Implemented FunctionParser

_concepts.txt

@@ -103,3 +103,5 @@ def concept q from q ? as question(q) pre is_question()
 set_is_lesser(__PRECEDENCE, q)
 def concept x is a 'concept' as isinstance(x, Concept) pre is_question()
 def concept x is a y as isa(x,y) pre is_question()
+def concept explain x values where x as get_results() | filter(f"id=={x}") | format_d
+set_isa(c:explain x values:, __COMMAND)

_concepts_lite.txt

@@ -1,13 +1,8 @@
 def concept one as 1
 def concept two as 2
-def concept plus from a plus b as a + b
 def concept explain as get_results() | filter("id == 0") | recurse(2)
 set_isa(c:explain:, __COMMAND)
 def concept explain last as get_last_results() | filter("id == 0") | recurse(2)
 set_isa(c:explain last:, __COMMAND)
-def concept precedence a > precedence b as set_is_greater_than(BuiltinConcepts.PRECEDENCE, a, b)
-set_isa(c:precedence a > precedence b:, __COMMAND)
-def concept x is a command as set_isa(x, __COMMAND)
-set_isa(c:x is a command:, __COMMAND)
-def concept q from q ? as question(q) pre in_context(BuiltinConcepts.EVAL_QUESTION_REQUESTED)
-def concept x is a 'concept' as isinstance(x, Concept) pre in_context(BuiltinConcepts.EVAL_QUESTION_REQUESTED)
+def concept explain x as get_results() | filter(f"id == {x}") | recurse(3) where x
+set_isa(c:explain x:, __COMMAND)

src/core/builtin_concepts.py

@@ -16,6 +16,8 @@ class BuiltinConcepts(Enum):
     SHEERKA = "sheerka"
 
     # processing instructions during sheerka.execute()
+    # The instruction may alter how the actions work
+    DEBUG = "debug" # activate all debug information
     EVAL_BODY_REQUESTED = "eval body"  # to evaluate the body
     EVAL_WHERE_REQUESTED = "eval where"  # to evaluate the where clause
     RETURN_BODY_REQUESTED = "return body"  # returns the body of the concept instead of the concept itself

src/core/builtin_helpers.py

@@ -6,14 +6,16 @@ from core.ast.nodes import CallNodeConcept
 from core.ast.visitors import UnreferencedNamesVisitor
 from core.builtin_concepts import BuiltinConcepts
 from core.concept import Concept, NotInit, ConceptParts
+from core.sheerka.services.SheerkaExecute import SheerkaExecute
 from core.tokenizer import Keywords
 # from evaluators.BaseEvaluator import BaseEvaluator
-from parsers.BaseNodeParser import SourceCodeNode, ConceptNode, UnrecognizedTokensNode
+from parsers.BaseNodeParser import SourceCodeNode, ConceptNode, UnrecognizedTokensNode, SourceCodeWithConceptNode
 from parsers.BaseParser import BaseParser, ErrorNode
 
 PARSE_STEPS = [BuiltinConcepts.BEFORE_PARSING, BuiltinConcepts.PARSING, BuiltinConcepts.AFTER_PARSING]
 EVAL_STEPS = PARSE_STEPS + [BuiltinConcepts.BEFORE_EVALUATION, BuiltinConcepts.EVALUATION,
                             BuiltinConcepts.AFTER_EVALUATION]
+PARSERS = ["EmptyString", "ShortTermMemory", "AtomNode", "BnfNode", "SyaNode", "Python"]
 
 
 def is_same_success(context, return_values):
@@ -342,6 +344,37 @@ def parse_unrecognized(context, source, parsers, who=None, prop=None, filter_fun
         return no_python
 
 
+def parse_function(context, source, tokens=None, start=0):
+    """
+    Helper function to parse what is supposed to be a function
+    :param context:
+    :param source:
+    :param tokens:
+    :param start: start index for the source code node
+    :return:
+    """
+    sheerka = context.sheerka
+    from parsers.FunctionParser import FunctionParser
+    parser = FunctionParser()
+    desc = f"Parsing function '{source}'"
+    with context.push(BuiltinConcepts.PARSE_CODE, source, desc=desc) as sub_context:
+        sheerka_execution = sheerka.services[SheerkaExecute.NAME]
+        res = parser.parse(sub_context, sheerka_execution.get_parser_input(source, tokens))
+
+        if not isinstance(res, list):
+            res = [res]
+
+        for r in [r for r in res if sheerka.isinstance(r.body, BuiltinConcepts.PARSER_RESULT)]:
+            r.body.body.start += start
+            r.body.body.end += start
+            if isinstance(r.body.body, SourceCodeWithConceptNode):
+                for n in [r.body.body.first, r.body.body.last] + r.body.body.nodes:
+                    n.start += start
+                    n.end += start
+
+    return res
+
+
 def evaluate(context,
              source,
              evaluators="all",
@@ -415,7 +448,12 @@ def get_lexer_nodes(return_values, start, tokens):
 
             end = start + len(tokens) - 1
             lexer_nodes.append(
-                [SourceCodeNode(ret_val.body.body, start, end, tokens, ret_val.body.source, ret_val)])
+                [SourceCodeNode(start,
+                                end,
+                                tokens,
+                                ret_val.body.source,
+                                python_node=ret_val.body.body,
+                                return_value=ret_val)])
 
         elif ret_val.who == "parsers.ExactConcept":
             concepts = ret_val.body.body if hasattr(ret_val.body.body, "__iter__") else [ret_val.body.body]
@@ -479,6 +517,81 @@ def get_lexer_nodes_from_unrecognized(context, unrecognized_tokens_node, parsers
     return get_lexer_nodes(res.body.body, unrecognized_tokens_node.start, unrecognized_tokens_node.tokens)
 
 
+def update_compiled(context, concept, errors, parsers=None):
+    """
+    recursively iterate thru concept.compiled to replace LexerNode into concepts or list of ReturnValueConcept
+    When parsing using a LexerNodeParser (SyaNodeParser, BnfNodeParser...)
+    the result will be a LexerNode.
+    In the specific case of a ConceptNode, the compiled variables will also be LexerNode (UnrecognizedTokensNode...)
+    This function iterate thru the compile to transform these nodes into concept of compiled AST
+    :param context:
+    :param concept:
+    :param errors: a list the must be initialized by the caller
+    :param parsers: to customize the parsers to use
+    :return:
+    """
+
+    sheerka = context.sheerka
+    parsers = parsers or PARSERS
+
+    def _validate_concept(c):
+        """
+        Recursively browse the compiled properties in order to find unrecognized
+        :param c:
+        :return:
+        """
+        for k, v in c.compiled.items():
+            if isinstance(v, Concept):
+                _validate_concept(v)
+
+            elif isinstance(v, SourceCodeWithConceptNode):
+                from parsers.PythonWithConceptsParser import PythonWithConceptsParser
+                parser_helper = PythonWithConceptsParser()
+                res = parser_helper.parse_nodes(context, v.get_all_nodes())
+                if res.status:
+                    c.compiled[k] = [res]
+                else:
+                    errors.append(sheerka.new(BuiltinConcepts.ERROR, body=f"Cannot parse '{v.source}'"))
+
+            elif isinstance(v, UnrecognizedTokensNode):
+                res = parse_unrecognized(context, v.source, parsers)
+                res = only_successful(context, res)  # only key successful parsers
+                if res.status:
+                    c.compiled[k] = res.body.body
+                else:
+                    errors.append(sheerka.new(BuiltinConcepts.ERROR, body=f"Cannot parse '{v.source}'"))
+
+    def _get_source(compiled, var_name):
+        if var_name not in compiled:
+            return None
+        if not isinstance(compiled[var_name], list):
+            return None
+        if not len(compiled[var_name]) == 1:
+            return None
+        if not sheerka.isinstance(compiled[var_name][0], BuiltinConcepts.RETURN_VALUE):
+            return None
+        if not sheerka.isinstance(compiled[var_name][0].body, BuiltinConcepts.PARSER_RESULT):
+            return None
+        if compiled[var_name][0].body.name == "parsers.ShortTermMemory":
+            return None
+
+        return compiled[var_name][0].body.source
+
+    _validate_concept(concept)
+
+    # Special case where the values of the variables are the names of the variable
+    # example : Concept("a plus b").def_var("a").def_var("b")
+    # and the user has entered 'a plus b'
+    # Chances are that we are talking about the concept itself, and not an instantiation (like '10 plus 2')
+    # This means that 'a' and 'b' don't have any real value
+    if len(concept.metadata.variables) > 0:
+        for name, value in concept.metadata.variables:
+            if _get_source(concept.compiled, name) != name:
+                break
+        else:
+            concept.metadata.is_evaluated = True
+
+
 def get_names(sheerka, concept_node):
     """
     Finds all the names referenced by the concept_node
@@ -603,10 +716,11 @@ def remove_from_ret_val(sheerka, return_values, concept_key):
     return return_values
 
 
-def set_is_evaluated(concepts):
+def set_is_evaluated(concepts, check_nb_variables=False):
     """
     set is_evaluated to True
     :param concepts:
+    :param check_nb_variables: only set is_evaluated if the concept has variables
     :return:
     """
     if concepts is None:
@@ -614,6 +728,8 @@ def set_is_evaluated(concepts):
 
     if hasattr(concepts, "__iter__"):
         for c in concepts:
-            c.metadata.is_evaluated = True
+            if not check_nb_variables or check_nb_variables and len(c.metadata.variables) > 0:
+                c.metadata.is_evaluated = True
     else:
-        concepts.metadata.is_evaluated = True
+        if not check_nb_variables or check_nb_variables and len(concepts.metadata.variables) > 0:
+            concepts.metadata.is_evaluated = True

src/core/concept.py

@@ -130,7 +130,7 @@ class Concept:
         if isinstance(other, simplec):
             return self.name == other.name and self.body == other.body
 
-        if isinstance(other, (CC, CB, CV, CMV)):
+        if isinstance(other, (CC, CB, CV, CMV, CIO)):
             return other == self
 
         if not isinstance(other, Concept):
@@ -726,4 +726,45 @@ class CMV:
         return txt + ")"
 
 
+class CIO:
+    """
+    Concept id only
+    only test the id
+    """
+
+    def __init__(self, concept, source=None):
+        if isinstance(concept, str):
+            self.concept_name = concept
+            self.concept_id = None
+            self.concept = None
+        elif isinstance(concept, Concept):
+            self.concept_id = concept.id
+            self.concept = concept
+        self.source = source
+        self.start = -1
+        self.end = -1
+
+    def set_concept(self, concept):
+        self.concept = concept
+        self.concept_id = concept.id
+
+    def __eq__(self, other):
+        if id(self) == id(other):
+            return True
+
+        if isinstance(other, Concept):
+            return self.concept_id == other.id
+
+        if not isinstance(other, CIO):
+            return False
+
+        return self.concept_id == other.concept_id
+
+    def __hash__(self):
+        return hash(self.concept_id)
+
+    def __repr__(self):
+        return f"CIO(concept='{self.concept}')" if self.concept else f"CIO(name='{self.concept_name}')"
+
+
 simplec = namedtuple("concept", "name body")  # for simple concept (tests purposes only)

src/core/sheerka/ExecutionContext.py

@@ -1,7 +1,7 @@
 import logging
 import time
 
-from core.builtin_concepts import BuiltinConcepts
+from core.builtin_concepts import BuiltinConcepts, ParserResultConcept
 from core.concept import Concept
 from core.sheerka.services.SheerkaExecute import NO_MATCH
 from core.sheerka.services.SheerkaShortTermMemory import SheerkaShortTermMemory
@@ -309,6 +309,15 @@ class ExecutionContext:
     def in_private_context(self, concept_key):
         return concept_key in self.private_hints
 
+    def add_to_private_hints (self, concept_key):
+        self.private_hints.add(concept_key)
+
+    def add_to_protected_hints(self, concept_key):
+        self.protected_hints.add(concept_key)
+
+    def add_to_global_hints(self, concept_key):
+        self.global_hints.add(concept_key)
+
     @staticmethod
     def _is_return_value(obj):
         return isinstance(obj, Concept) and obj.key == str(BuiltinConcepts.RETURN_VALUE)
@@ -358,7 +367,11 @@ class ExecutionContext:
             ret_val = self.values["return_values"]
             if not isinstance(ret_val, Concept) or not ret_val.key == str(BuiltinConcepts.RETURN_VALUE):
                 return None
-            return ret_val.status
+            if ret_val.status:
+                return True
+            if isinstance(ret_val.body, ParserResultConcept):
+                return "Almost"
+            return False
 
     def as_bag(self):
         """

src/core/sheerka/Sheerka.py

@@ -558,6 +558,12 @@ class Sheerka(Concept):
         return self._get_unknown(metadata)
 
     def resolve(self, concept):
+        """
+        Try to find a concept by its name, id, or c:: definition
+        A new instance (using new_from_template()) is returned when it's possible
+        :param concept:
+        :return:
+        """
 
         def new_instances(concepts):
             if hasattr(concepts, "__iter__"):
@@ -567,6 +573,9 @@ class Sheerka(Concept):
         if concept is None:
             return None
 
+        # ##############
+        # PREPROCESS
+        # ##############
         # if the entry is a concept token, use its values.
         if isinstance(concept, Token):
             if concept.type != TokenKind.CONCEPT:
@@ -578,6 +587,9 @@ class Sheerka(Concept):
             (tmp := core.utils.unstr_concept(concept)) != (None, None):
             concept = tmp
 
+        # ##############
+        # PROCESS
+        # ##############
         # if the entry is a tuple
         # concept[0] is the name
         # concept[1] is the id
@@ -599,7 +611,7 @@ class Sheerka(Concept):
         if isinstance(concept, str):
             if self.is_known(found := self.get_by_name(concept)):
                 instances = new_instances(found)
-                core.builtin_helpers.set_is_evaluated(instances)
+                core.builtin_helpers.set_is_evaluated(instances, check_nb_variables=True)
                 return instances
 
         return None

src/core/sheerka/services/SheerkaAdmin.py

@@ -5,7 +5,7 @@ from core.sheerka.services.sheerka_service import BaseService
 
 CONCEPTS_FILE = "_concepts_lite.txt"
 CONCEPTS_FILE_ALL_CONCEPTS = "_concepts.txt"
-CONCEPTS_FILE_TO_USE = CONCEPTS_FILE_ALL_CONCEPTS
+CONCEPTS_FILE_TO_USE = CONCEPTS_FILE
 
 class SheerkaAdmin(BaseService):
     NAME = "Admin"
@@ -47,6 +47,9 @@ class SheerkaAdmin(BaseService):
         if concept_file == "full":
             concept_file = CONCEPTS_FILE_ALL_CONCEPTS
 
+        elif not concept_file.startswith("_concepts"):
+            concept_file = f"_concepts_{concept_file}.txt"
+
         try:
             start = time.time_ns()
             nb_lines = 0

src/core/sheerka/services/SheerkaExecute.py

@@ -2,7 +2,7 @@ import core.utils
 from cache.Cache import Cache
 from core.builtin_concepts import BuiltinConcepts, ReturnValueConcept
 from core.sheerka.services.sheerka_service import BaseService
-from core.tokenizer import Tokenizer, TokenKind, Keywords, Token
+from core.tokenizer import Tokenizer, TokenKind, Token
 
 NO_MATCH = "** No Match **"
 
@@ -88,6 +88,20 @@ class ParserInput:
 
         return self.pos < self.end
 
+    def seek(self, pos):
+        """
+        Move the token offset to position pos
+        :param pos:
+        :return: True is pos is a valid position False otherwise
+        """
+        if pos < 0 or pos >= self.end:
+            self.token = None
+            return False
+
+        self.pos = pos
+        self.token = self.tokens[self.pos]
+        return True
+
     def is_empty(self):
         if self.text.strip() == "":
             return True
@@ -116,7 +130,6 @@ class ParserInput:
             tokens = [tokens]
 
         switcher = {
-            TokenKind.KEYWORD: lambda t: Keywords(t.value).value,
             TokenKind.CONCEPT: lambda t: core.utils.str_concept(t.value),
         }
 

src/core/sheerka/services/SheerkaModifyConcept.py

@@ -31,6 +31,7 @@ class SheerkaModifyConcept(BaseService):
 
         if old_version == concept:
             # the concept is not modified
+            # This is an important sanity check. Do no remove because you don't understand it
             return self.sheerka.ret(
                 self.NAME, False,
                 self.sheerka.new(

src/core/sheerka/services/SheerkaVariableManager.py

@@ -2,6 +2,7 @@ from dataclasses import dataclass
 from typing import List
 
 from cache.Cache import Cache
+from core.builtin_concepts import BuiltinConcepts
 from core.sheerka.services.sheerka_service import ServiceObj, BaseService
 
 
@@ -48,6 +49,7 @@ class SheerkaVariableManager(BaseService):
 
         variable = Variable(context.event.get_digest(), who, key, value, None)
         self.sheerka.cache_manager.put(self.VARIABLES_ENTRY, variable.get_key(), variable)
+        return self.sheerka.ret(self.NAME, True, self.sheerka.new(BuiltinConcepts.SUCCESS))
 
     def load(self, who, key):
         variable = self.sheerka.cache_manager.get(self.VARIABLES_ENTRY, who + "|" + key)

src/core/tokenizer.py

@@ -62,6 +62,7 @@ class Token:
 
     _strip_quote: str = field(default=None, repr=False, compare=False, hash=None)
     _str_value: str = field(default=None, repr=False, compare=False, hash=None)
+    _repr_value: str = field(default=None, repr=False, compare=False, hash=None)
 
     def __repr__(self):
         if self.type == TokenKind.IDENTIFIER:
@@ -82,7 +83,7 @@ class Token:
         if self._strip_quote:
             return self._strip_quote
 
-        self._strip_quote = self._to_str(True)
+        self._strip_quote = self.value[1:-1] if self.type == TokenKind.STRING else self.value
         return self._strip_quote
 
     @property
@@ -90,18 +91,36 @@ class Token:
         if self._str_value:
             return self._str_value
 
-        self._str_value = self._to_str(False)
+        self._str_value = self.to_str(False)
         return self._str_value
 
+    @property
+    def repr_value(self):
+        if self._repr_value:
+            return self._repr_value
+
+        if self.type == TokenKind.EOF:
+            self._repr_value = "<EOF>"
+        elif self.type == TokenKind.WHITESPACE:
+            self._repr_value = "<ws>"
+        elif self.type == TokenKind.NEWLINE:
+            self._repr_value = "<nl>"
+        else:
+            self._repr_value = self.str_value
+        return self._repr_value
+
     @staticmethod
     def is_whitespace(token):
         return token and token.type == TokenKind.WHITESPACE
 
-    def _to_str(self, strip_quote):
+    def to_str(self, strip_quote):
         if strip_quote and self.type == TokenKind.STRING:
             return self.value[1:-1]
         elif self.type == TokenKind.KEYWORD:
             return self.value.value
+        elif self.type == TokenKind.CONCEPT:
+            from core.utils import str_concept
+            return str_concept(self.value)
         else:
             return str(self.value)
 
@@ -136,8 +155,6 @@ class Tokenizer:
     Class that can iterate on the tokens
     """
 
-    KEYWORDS = set(x.value for x in Keywords)
-
     def __init__(self, text, yield_eof=True, parse_word=False):
         self.text = text
         self.text_len = len(text)
@@ -175,9 +192,7 @@ class Tokenizer:
                 from core.concept import VARIABLE_PREFIX
                 if self.i + 1 < self.text_len and self.text[self.i + 1].isalpha():
                     identifier = self.eat_identifier(self.i)
-                    token_type = TokenKind.KEYWORD if identifier in self.KEYWORDS else TokenKind.IDENTIFIER
-                    value = Keywords(identifier) if identifier in self.KEYWORDS else identifier
-                    yield Token(token_type, value, self.i, self.line, self.column)
+                    yield Token(TokenKind.IDENTIFIER, identifier, self.i, self.line, self.column)
                     self.i += len(identifier)
                     self.column += len(identifier)
                 elif self.i + 7 < self.text_len and \
@@ -335,11 +350,9 @@ class Tokenizer:
                 yield Token(TokenKind.WORD, word, self.i, self.line, self.column)
                 self.i += len(word)
                 self.column += len(word)
-            elif c.isalpha() or c == "_":
+            elif c.isalpha():
                 identifier = self.eat_identifier(self.i)
-                token_type = TokenKind.KEYWORD if identifier in self.KEYWORDS else TokenKind.IDENTIFIER
-                value = Keywords(identifier) if identifier in self.KEYWORDS else identifier
-                yield Token(token_type, value, self.i, self.line, self.column)
+                yield Token(TokenKind.IDENTIFIER, identifier, self.i, self.line, self.column)
                 self.i += len(identifier)
                 self.column += len(identifier)
             elif c.isdigit():
@@ -457,7 +470,7 @@ class Tokenizer:
 
         i = start_index + 1
         escape = False
-        #newline = None
+        # newline = None
         while i < self.text_len:
             c = self.text[i]
             result += c

src/core/utils.py

@@ -296,6 +296,28 @@ def dict_product(a, b):
     return res
 
 
+def get_n_clones(obj, n):
+    objs = [obj]
+    for i in range(n - 1):
+        objs.append(obj.clone())
+    return objs
+
+
+def obj_product(list_of_objs, new_items, add_item):
+    if list_of_objs is None or len(list_of_objs) == 0:
+        return list_of_objs
+
+    res = []
+
+    for obj in list_of_objs:
+        instances = get_n_clones(obj, len(new_items))
+        res.extend(instances)
+        for instance, item in zip(instances, new_items):
+            add_item(instance, item)
+
+    return res
+
+
 def strip_quotes(text):
     if not isinstance(text, str):
         return text

src/evaluators/AddConceptEvaluator.py

@@ -1,6 +1,7 @@
 import core.utils
 from core.builtin_concepts import ParserResultConcept, ReturnValueConcept, BuiltinConcepts
 from core.concept import Concept, DEFINITION_TYPE_BNF, DEFINITION_TYPE_DEF
+from core.sheerka.services.SheerkaExecute import ParserInput
 from core.tokenizer import TokenKind, Tokenizer
 from evaluators.BaseEvaluator import OneReturnValueEvaluator
 from parsers.BaseParser import NotInitializedNode
@@ -67,7 +68,8 @@ class AddConceptEvaluator(OneReturnValueEvaluator):
             elif isinstance(part_ret_val, NameNode):
                 source = str(part_ret_val)
             elif isinstance(part_ret_val, ReturnValueConcept) and part_ret_val.status:
-                source = part_ret_val.value.source
+                source = part_ret_val.value.source.as_text() if isinstance(part_ret_val.value.source,
+                                                                           ParserInput) else part_ret_val.value.source
             else:
                 raise Exception("Unexpected")
             setattr(concept.metadata, prop, source)
@@ -143,7 +145,9 @@ class AddConceptEvaluator(OneReturnValueEvaluator):
         #
         if isinstance(ret_value.value, ParserResultConcept) and len(concept_name) > 1:
             variables = set()
-            tokens = ret_value.value.tokens or list(Tokenizer(ret_value.value.source, yield_eof=False))
+            source = ret_value.value.source.as_text() if isinstance(ret_value.value.source,
+                                                                    ParserInput) else ret_value.value.source
+            tokens = ret_value.value.tokens or list(Tokenizer(source, yield_eof=False))
             tokens = [t.str_value for t in tokens]
             for identifier in [i for i in concept_name if str(i).isalnum()]:
                 if identifier in tokens:

src/evaluators/LexerNodeEvaluator.py

@@ -1,7 +1,7 @@
 from core.builtin_concepts import ParserResultConcept, BuiltinConcepts
 from evaluators.BaseEvaluator import OneReturnValueEvaluator
 from parsers.BaseNodeParser import SourceCodeNode, ConceptNode
-from parsers.PythonParser import LexerNodeParserHelperForPython, PythonNode
+from parsers.PythonWithConceptsParser import PythonWithConceptsParser
 
 
 class LexerNodeEvaluator(OneReturnValueEvaluator):
@@ -82,19 +82,10 @@ class LexerNodeEvaluator(OneReturnValueEvaluator):
     def evaluate_python_code(self, context, nodes):
         sheerka = context.sheerka
 
-        helper = LexerNodeParserHelperForPython()
-        result = helper.parse(context, nodes)
-
-        if isinstance(result, PythonNode):
-            return sheerka.ret(
-                self.name,
-                True,
-                sheerka.new(
-                    BuiltinConcepts.PARSER_RESULT,
-                    parser=self,
-                    source=result.source,
-                    body=result,
-                    try_parsed=None))
+        parser = PythonWithConceptsParser()
+        result = parser.parse_nodes(context, nodes)
+        if result:
+            return result
         else:
             return sheerka.ret(
                 self.name,

src/evaluators/PythonEvaluator.py

@@ -40,6 +40,7 @@ class Expando:
     def __repr__(self):
         return f"{dir(self)}"
 
+
 @dataclass
 class PythonEvalError:
     error: Exception
@@ -59,13 +60,19 @@ class PythonEvaluator(OneReturnValueEvaluator):
         self.globals = {}
 
     def matches(self, context, return_value):
-        return return_value.status and \
-               isinstance(return_value.value, ParserResultConcept) and \
-               isinstance(return_value.value.value, PythonNode)
+        if not return_value.status or not isinstance(return_value.value, ParserResultConcept):
+            return False
+        body = return_value.value.value
+        return isinstance(body, PythonNode) or (
+            hasattr(body, "python_node") and isinstance(body.python_node, PythonNode))
+        # return return_value.status and \
+        #        isinstance(return_value.value, ParserResultConcept) and \
+        #        isinstance(return_value.value.value, PythonNode)
 
     def eval(self, context, return_value):
         sheerka = context.sheerka
-        node = return_value.value.value
+        node = return_value.value.value if isinstance(return_value.value.value, PythonNode) else \
+            return_value.value.value.python_node
 
         context.log(f"Evaluating python node {node}.", self.name)
 

src/parsers/AtomNodeParser.py

@@ -4,8 +4,8 @@ from core import builtin_helpers
 from core.builtin_concepts import BuiltinConcepts
 from core.concept import DEFINITION_TYPE_BNF, Concept
 from core.sheerka.services.SheerkaExecute import ParserInput
-from core.tokenizer import Tokenizer
-from core.utils import strip_tokens
+from core.tokenizer import Tokenizer, TokenKind
+from core.utils import strip_tokens, make_unique
 from parsers.BaseNodeParser import BaseNodeParser, ConceptNode, UnrecognizedTokensNode, SourceCodeNode
 from parsers.BaseParser import UnexpectedTokenErrorNode, ErrorNode
 
@@ -228,6 +228,34 @@ class AtomNodeParser(BaseNodeParser):
         """
         return len(concept.metadata.variables) == 0 and concept.metadata.definition_type != DEFINITION_TYPE_BNF
 
+    def get_concepts(self, token, to_keep, custom=None, to_map=None, strip_quotes=False):
+
+        def new_instances(list_of_concepts):
+            if list_of_concepts is None:
+                return None
+
+            return [self.context.sheerka.new_from_template(c, c.id) for c in list_of_concepts]
+
+        if token.type == TokenKind.WHITESPACE:
+            return None
+
+        def as_list(a):
+            if a is None:
+                return a
+
+            return a if isinstance(a, list) else [a]
+
+        concepts_by_name = as_list(self.sheerka.resolve(token.value))
+        concepts_by_first_keyword = new_instances(super().get_concepts(token, self._is_eligible))
+
+        if concepts_by_name is None:
+            return concepts_by_first_keyword
+
+        if concepts_by_first_keyword is None:
+            return concepts_by_name
+
+        return make_unique(concepts_by_name + concepts_by_first_keyword, lambda c: c.id)
+
     def get_concepts_sequences(self):
 
         forked = []
@@ -242,13 +270,6 @@ class AtomNodeParser(BaseNodeParser):
                 concept_parser_helpers.extend(forked)
                 forked.clear()
 
-        def _get_concepts_by_name(name):
-            other_concepts = self.sheerka.get_by_name(name)
-            if isinstance(other_concepts, list):
-                return other_concepts
-
-            return [other_concepts] if self.sheerka.is_known(other_concepts) else []
-
         concept_parser_helpers = [AtomConceptParserHelper(self.context)]
 
         while self.parser_input.next_token(False):
@@ -263,8 +284,8 @@ class AtomNodeParser(BaseNodeParser):
                     if concept_parser.eat_token(token, pos):
                         concept_parser.lock()
 
-                concepts = self.get_concepts(token, self._is_eligible, custom=_get_concepts_by_name)
-                #self.context.log(f"concepts found for {token=}: {concepts}", who=self.name)
+                concepts = self.get_concepts(token, self._is_eligible)
+                # self.context.log(f"concepts found for {token=}: {concepts}", who=self.name)
                 if not concepts:
                     for concept_parser in concept_parser_helpers:
                         concept_parser.eat_unrecognized(token, pos)
@@ -303,12 +324,13 @@ class AtomNodeParser(BaseNodeParser):
 
     def get_by_name(self):
         """
-        Try to recognize the full parser input as a concept name
+        Use the whole input to recognize the concepts
+        It will use the name of the concept, but also its compact form (c::)
         :return:
         """
         source = self.parser_input.as_text()
-        concepts = self.sheerka.get_by_name(source.strip())
-        if not self.sheerka.is_known(concepts):
+        concepts = self.sheerka.resolve(source.strip())
+        if concepts is None:
             return None
 
         concepts = [concepts] if isinstance(concepts, Concept) else concepts
@@ -316,17 +338,27 @@ class AtomNodeParser(BaseNodeParser):
         start, end = self.get_tokens_boundaries(self.parser_input.as_tokens())
         for concept in concepts:
             parser_helper = AtomConceptParserHelper(None)
-            parser_helper.sequence.append(ConceptNode(
-                concept,
-                start,
-                end,
-                strip_tokens(self.parser_input.as_tokens(), True), source))
+            parser_helper.sequence.append(ConceptNode(concept,
+                                                      start,
+                                                      end,
+                                                      strip_tokens(self.parser_input.as_tokens(), True), source))
             res.append(parser_helper)
 
         return res
 
     def get_valid(self, concept_parser_helpers):
         valid_parser_helpers = []  # be careful, it will be a list of list
+        already_seen = set()
+
+        def compute_hash_code(ph):
+            """
+            compute a hash code for already seen parser helper
+            :param ph:
+            :return:
+            """
+            return "#".join(
+                [f"c:|{n.concept.id}:" if isinstance(n, ConceptNode) else n.source for n in ph.sequence])
+
         for parser_helper in concept_parser_helpers:
             if parser_helper.has_error():
                 continue
@@ -335,16 +367,18 @@ class AtomNodeParser(BaseNodeParser):
                 continue
 
             for node in parser_helper.sequence:
-                if isinstance(node, ConceptNode):
-                    if len(node.concept.metadata.variables) > 0:
-                        node.concept.metadata.is_evaluated = True  # Do not try to evaluate those concepts
+                # if isinstance(node, ConceptNode):
+                #     if len(node.concept.metadata.variables) > 0:
+                #         node.concept.metadata.is_evaluated = True  # Do not try to evaluate those concepts
                 node.tokens = self.parser_input.tokens[node.start:node.end + 1]
                 node.fix_source()
 
-            if parser_helper in valid_parser_helpers:
+            parser_helper_hash_code = compute_hash_code(parser_helper)
+            if parser_helper_hash_code in already_seen:
                 continue
 
             valid_parser_helpers.append(parser_helper)
+            already_seen.add(parser_helper_hash_code)
 
         return valid_parser_helpers
 

src/parsers/BaseNodeParser.py

@@ -7,7 +7,7 @@ import core.utils
 from core.builtin_concepts import BuiltinConcepts
 from core.concept import VARIABLE_PREFIX, Concept, DEFINITION_TYPE_BNF, ConceptParts
 from core.sheerka.services.SheerkaExecute import ParserInput
-from core.tokenizer import TokenKind, LexerError, Token, Keywords
+from core.tokenizer import TokenKind, LexerError, Token
 from parsers.BaseParser import Node, BaseParser, ErrorNode
 
 DEBUG_COMPILED = True
@@ -46,14 +46,18 @@ class LexerNode(Node):
     def clone(self):
         pass
 
+    def to_short_str(self):
+        raise NotImplementedError
+
 
 class UnrecognizedTokensNode(LexerNode):
     def __init__(self, start, end, tokens):
         super().__init__(start, end, tokens)
-        self.is_frozen = False
+        self.is_frozen = False  # TODO: Remove as it seems to now be useless
         self.parenthesis_count = 0
 
     def freeze(self):
+        # TODO: Remove as it seems to now be useless
         self.is_frozen = True
 
     def reset(self):
@@ -61,6 +65,7 @@ class UnrecognizedTokensNode(LexerNode):
         self.tokens.clear()
         self.is_frozen = False
         self.parenthesis_count = 0
+        self.source = ""
 
     def add_token(self, token, pos):
         if self.is_frozen:
@@ -135,7 +140,7 @@ class UnrecognizedTokensNode(LexerNode):
         return hash((self.start, self.end, self.source))
 
     def __repr__(self):
-        return f"UnrecognizedTokensNode(start={self.start}, end={self.end}, source='{self.source}')"
+        return f"UnrecognizedTokensNode(source='{self.source}', start={self.start}, end={self.end})"
 
     def clone(self):
         clone = UnrecognizedTokensNode(self.start, self.end, self.tokens[:])
@@ -143,6 +148,9 @@ class UnrecognizedTokensNode(LexerNode):
         clone.parenthesis_count = self.parenthesis_count
         return clone
 
+    def to_short_str(self):
+        return f"UTN('{self.source}')"
+
 
 class ConceptNode(LexerNode):
     """
@@ -209,15 +217,30 @@ class ConceptNode(LexerNode):
         #     bag["compiled"] = self.concept.compiled
         return bag
 
+    def to_short_str(self):
+        return f'CN({self.concept})'
+
 
 class SourceCodeNode(LexerNode):
     """
     Returned when some source code (like Python source code is recognized)
     """
 
-    def __init__(self, node, start, end, tokens=None, source=None, return_value=None):
+    def __init__(self, start, end, tokens=None, source=None, python_node=None, return_value=None):
+        """
+
+        :param start: start position (index of the first token)
+        :param end: end position (index of the last token)
+        :param tokens:
+        :param source: tokens as string
+        :param python_node: PythonNode found (when the SourceCodeNode is validated)
+        :param return_value: ReturnValueConcept returned when the source was validated
+
+        When return_value is provided,
+        You should have return_value.body.body == node
+        """
         super().__init__(start, end, tokens, source)
-        self.node = node  # The PythonNode (or whatever language node) that is found
+        self.python_node = python_node  # The PythonNode (or whatever language node) that is found
         self.return_value = return_value  # original result of the parsing
 
     def __eq__(self, other):
@@ -232,7 +255,7 @@ class SourceCodeNode(LexerNode):
         if not isinstance(other, SourceCodeNode):
             return False
 
-        return self.node == other.node and \
+        return self.python_node == other.python_node and \
                self.start == other.start and \
                self.end == other.end and \
                self.source == other.source
@@ -243,6 +266,9 @@ class SourceCodeNode(LexerNode):
     def __repr__(self):
         return f"SourceCodeNode(start={self.start}, end={self.end}, source='{self.source}')"
 
+    def to_short_str(self):
+        return f"SCN('{self.source}')"
+
 
 class SourceCodeWithConceptNode(LexerNode):
     """
@@ -254,17 +280,22 @@ class SourceCodeWithConceptNode(LexerNode):
     So I push all the nodes into one big bag
     """
 
-    def __init__(self, first_node, last_node, content_nodes=None):
+    def __init__(self, first_node, last_node, content_nodes=None, has_unrecognized=False):
         super().__init__(9999, -1, None)  # why not sys.maxint ?
         self.first = first_node
         self.last = last_node
         self.nodes = content_nodes or []
-        self.has_unrecognized = False
+        self.has_unrecognized = has_unrecognized
+        self._all_nodes = None
         self.fix_all_pos()
 
+        self.python_node = None  # if the source code node is validated against a python parse, here is the PythonNode
+        self.return_value = None  # return_value that produced the PythonNode
+
     def add_node(self, node):
         self.nodes.append(node)
         self.fix_pos(node)
+        self._all_nodes = None
 
         return self
 
@@ -304,6 +335,9 @@ class SourceCodeWithConceptNode(LexerNode):
         return f"SourceCodeWithConceptNode(start={self.start}, end={self.end}, source='{self.source}')"
 
     def fix_all_pos(self):
+        if self.first is None:  # to ease some unit test where only the python_node is necessary
+            return
+
         for n in [self.first, self.last] + self.nodes:
             self.fix_pos(n)
 
@@ -334,10 +368,20 @@ class SourceCodeWithConceptNode(LexerNode):
         self.source += self.last.source
         return self
 
+    def get_all_nodes(self):
+        if self._all_nodes:
+            return self._all_nodes
+
+        self._all_nodes = [self.first, *self.nodes, self.last]
+        return self._all_nodes
+
     def clone(self):
-        clone = SourceCodeWithConceptNode(self.first, self.last, self.nodes)
+        clone = SourceCodeWithConceptNode(self.first, self.last, self.nodes.copy(), self.has_unrecognized)
         return clone
 
+    def to_short_str(self):
+        return f"SCWC({self.first}" + ", ".join(n.to_short_str for n in self.nodes) + f"{self.last})"
+
 
 @dataclass()
 class GrammarErrorNode(ErrorNode):
@@ -479,7 +523,7 @@ class SCWC(HelperWithPos):
         TODO: create a common function or whatever...
         :return:
         """
-        source = self.first.source
+        source = self.first.source if hasattr(self.first, "source") else self.first
         for n in self.content:
             source += " "
             if hasattr(n, "source"):
@@ -488,7 +532,7 @@ class SCWC(HelperWithPos):
                 source += str(n.concept)
             else:
                 source += " unknown"
-        source += self.last.source
+        source += self.last.source if hasattr(self.last, "source") else self.last
         return source
 
 
@@ -514,7 +558,7 @@ class CN(HelperWithPos):
         self.concept = concept if isinstance(concept, Concept) else None
 
     def fix_source(self, str_tokens):
-        self.source = "".join([s.value if isinstance(s, Keywords) else s for s in str_tokens])
+        self.source = "".join(str_tokens)
         return self
 
     def __eq__(self, other):
@@ -660,7 +704,7 @@ class UTN(HelperWithPos):
         return hash((self.source, self.start, self.end))
 
     def __repr__(self):
-        txt = f"UTN( source='{self.source}'"
+        txt = f"UTN(source='{self.source}'"
         if self.start is not None:
             txt += f", start={self.start}"
         if self.end is not None:
@@ -733,7 +777,7 @@ class BaseNodeParser(BaseParser):
         else:
             name = token.value
 
-        custom_concepts = custom(name) if custom else []
+        custom_concepts = custom(name) if custom else []  # to get extra concepts using an alternative method
 
         result = []
         if name in self.concepts_by_first_keyword:
@@ -746,6 +790,7 @@ class BaseNodeParser(BaseParser):
 
                 concept = to_map(self, concept) if to_map else concept
                 result.append(concept)
+
             return core.utils.make_unique(result + custom_concepts,
                                           lambda c: c.concept.id if hasattr(c, "concept") else c.id)
 

src/parsers/BaseParser.py

@@ -5,8 +5,9 @@ import core.utils
 from core.builtin_concepts import BuiltinConcepts, ParserResultConcept
 from core.concept import Concept
 from core.sheerka.ExecutionContext import ExecutionContext
+from core.sheerka.services.SheerkaExecute import ParserInput
 from core.sheerka_logger import get_logger
-from core.tokenizer import TokenKind, Keywords, Token, Tokenizer
+from core.tokenizer import TokenKind, Token, Tokenizer, LexerError
 
 
 # # keep a cache for the parser input
@@ -118,6 +119,20 @@ class BaseParser:
     def __repr__(self):
         return self.name
 
+    def reset_parser(self, context, parser_input: ParserInput):
+        self.context = context
+        self.sheerka = context.sheerka
+        self.parser_input = parser_input
+        self.error_sink.clear()
+
+        try:
+            self.parser_input.reset(False)
+            self.parser_input.next_token()
+        except LexerError as e:
+            self.add_error(self.sheerka.new(BuiltinConcepts.ERROR, body=e), False)
+            return False
+        return True
+
     def parse(self, context, parser_input):
         pass
 
@@ -227,15 +242,14 @@ class BaseParser:
             tokens = [tokens]
 
         switcher = {
-            TokenKind.KEYWORD: lambda t: Keywords(t.value).value,
-            TokenKind.CONCEPT: lambda t: core.utils.str_concept(t.value),
+         #   TokenKind.CONCEPT: lambda t: core.utils.str_concept(t.value),
         }
 
         if custom_switcher:
             switcher.update(custom_switcher)
 
         for token in tokens:
-            value = switcher.get(token.type, lambda t: t.value)(token)
+            value = switcher.get(token.type, lambda t: t.str_value)(token)
             res += value
             if tracker is not None and token.type in custom_switcher:
                 tracker[value] = token.value

src/parsers/DefaultParser.py

@@ -201,12 +201,12 @@ class DefaultParser(BaseParser):
 
     def parse_statement(self):
         token = self.parser_input.token
-        if token.value == Keywords.DEF:
+        if token.value == Keywords.DEF.value:
             self.parser_input.next_token()
             self.context.log("Keyword DEF found.", self.name)
             return self.parse_def_concept(token)
-        else:
-            return self.parse_isa_concept()
+
+        return self.add_error(CannotHandleErrorNode([token], ""))
 
     def parse_def_concept(self, def_token):
         """
@@ -250,44 +250,15 @@ class DefaultParser(BaseParser):
 
         return concept_found
 
-    def parse_isa_concept(self):
-        concept_name = self.parse_concept_name()
-        if isinstance(concept_name, DefaultParserErrorNode):
-            return concept_name
-
-        keyword = []
-        token = self.parser_input.token
-        if token.value != Keywords.ISA:
-            return self.add_error(CannotHandleErrorNode([token], ""))
-        keyword.append(token)
-        self.parser_input.next_token()
-
-        set_name = self.parse_concept_name()
-        return IsaConceptNode(keyword, concept_name, set_name)
-
-    def parse_concept_name(self):
-        tokens = []
-        token = self.parser_input.token
-
-        while not (token.type == TokenKind.EOF or token.type == TokenKind.KEYWORD):
-            tokens.append(token)
-            self.parser_input.next_token()
-            token = self.parser_input.token
-
-        if len(tokens) == 0:
-            return self.add_error(UnexpectedTokenErrorNode([token], "Unexpected token", []))
-        else:
-            return NameNode(tokens)
-
     def regroup_tokens_by_parts(self, keywords_tokens):
 
-        def_concept_parts = [Keywords.CONCEPT,
-                             Keywords.FROM,
-                             Keywords.AS,
-                             Keywords.WHERE,
-                             Keywords.PRE,
-                             Keywords.POST,
-                             Keywords.RET]
+        def_concept_parts = [Keywords.CONCEPT.value,
+                             Keywords.FROM.value,
+                             Keywords.AS.value,
+                             Keywords.WHERE.value,
+                             Keywords.PRE.value,
+                             Keywords.POST.value,
+                             Keywords.RET.value]
 
         # tokens found, when trying to recognize the parts
         tokens_found_by_parts = {
@@ -307,7 +278,7 @@ class DefaultParser(BaseParser):
         while token.type != TokenKind.EOF:
             if token.value in def_concept_parts:
                 keywords_tokens.append(token)  # keep track of the keywords
-                keyword = token.value
+                keyword = Keywords(token.value)
                 if tokens_found_by_parts[keyword]:
                     # a part is defined more than once
                     self.add_error(SyntaxErrorNode([token], f"Too many '{keyword.value}' declarations."))
@@ -327,7 +298,7 @@ class DefaultParser(BaseParser):
     def get_concept_name(self, first_token, tokens_found_by_parts):
         name_first_token_index = 1
         token = self.parser_input.token
-        if first_token.value != Keywords.CONCEPT:
+        if first_token.value != Keywords.CONCEPT.value:
             self.add_error(UnexpectedTokenErrorNode([token], "Syntax error.", [Keywords.CONCEPT]))
             name_first_token_index = 0
 
@@ -353,7 +324,7 @@ class DefaultParser(BaseParser):
             self.add_error(SyntaxErrorNode([], "Empty declaration"), False)
             return None, NotInitializedNode()
 
-        if definition_tokens[1].value == Keywords.BNF:
+        if definition_tokens[1].value == Keywords.BNF.value:
             return self.get_concept_bnf_definition(current_concept_def, definition_tokens)
 
         return self.get_concept_simple_definition(definition_tokens)
@@ -381,7 +352,7 @@ class DefaultParser(BaseParser):
             return DEFINITION_TYPE_BNF, parsing_result
 
     def get_concept_simple_definition(self, definition_tokens):
-        start = 2 if definition_tokens[1].value == Keywords.DEF else 1
+        start = 2 if definition_tokens[1].value == Keywords.DEF.value else 1
         tokens = core.utils.strip_tokens(definition_tokens[start:])
         if len(tokens) == 0:
             self.add_error(SyntaxErrorNode([definition_tokens[start]], "Empty declaration"), False)

src/parsers/ExactConceptParser.py

@@ -2,9 +2,9 @@ import logging
 
 import core.builtin_helpers
 from core.builtin_concepts import ReturnValueConcept, BuiltinConcepts
-from core.concept import VARIABLE_PREFIX, ConceptParts
+from core.concept import VARIABLE_PREFIX
 from core.sheerka.services.SheerkaExecute import ParserInput
-from core.tokenizer import Keywords, TokenKind, LexerError
+from core.tokenizer import TokenKind, LexerError
 from core.utils import str_concept
 from parsers.BaseParser import BaseParser
 
@@ -56,6 +56,7 @@ class ExactConceptParser(BaseParser):
             concepts = result if isinstance(result, list) else [result]
 
             for concept in concepts:
+                # update the variables of the freshly recognized concept
                 if concept in already_recognized:
                     context.log(f"Recognized concept {concept} again. Skipping.", self.name)
                     # example
@@ -105,7 +106,7 @@ class ExactConceptParser(BaseParser):
                 break
             if t.type == TokenKind.NEWLINE or t.type == TokenKind.WHITESPACE:
                 continue
-            res.append(t.value.value if isinstance(t.value, Keywords) else t.value)
+            res.append(t.value)
         return res
 
     def combinations(self, iterable):

src/parsers/ExpressionParser.py

@@ -191,23 +191,8 @@ class ExpressionParser(BaseParser):
     def __init__(self, **kwargs):
         super().__init__("Expression", 50, False)
 
-    def reset_parser(self, context, parser_input: ParserInput):
-        self.context = context
-        self.sheerka = context.sheerka
-        self.parser_input = parser_input
-        self.error_sink.clear()
-
-        try:
-            self.parser_input.reset(False)
-            self.parser_input.next_token()
-        except LexerError as e:
-            self.add_error(self.sheerka.new(BuiltinConcepts.ERROR, body=e), False)
-            return False
-        return True
-
     def parse(self, context, parser_input: ParserInput):
         """
-        parser_input can be string, but text can also be an list of tokens
         :param context:
         :param parser_input:
         :return:

src/parsers/FunctionParser.py

@@ -0,0 +1,407 @@
+from dataclasses import dataclass
+from typing import List
+
+from core.builtin_concepts import BuiltinConcepts
+from core.builtin_helpers import get_lexer_nodes_from_unrecognized, update_compiled
+from core.sheerka.services.SheerkaExecute import ParserInput
+from core.tokenizer import TokenKind, Token
+from core.utils import get_n_clones
+from parsers.BaseNodeParser import SourceCodeNode, SourceCodeWithConceptNode, UnrecognizedTokensNode
+from parsers.BaseParser import BaseParser, UnexpectedTokenErrorNode, UnexpectedEof, Node
+from parsers.PythonWithConceptsParser import PythonWithConceptsParser
+
+# No need to check for Python code as the source code node will resolve to python code anyway
+# I only look for concepts, so
+PARSERS = ["BnfNode", "SyaNode", "AtomNode"]
+
+
+@dataclass
+class FunctionParserNode(Node):
+    pass
+
+
+@dataclass()
+class NamesNode(FunctionParserNode):
+    start: int  # index of the first token
+    end: int  # index of the last token
+    tokens: List[Token]
+
+    def __repr__(self):
+        return f"NameNode('{self.str_value()}')"
+
+    def str_value(self):
+        if self.tokens is None:
+            return None
+
+        return "".join([t.str_value for t in self.tokens])
+
+    def to_unrecognized(self):
+        return UnrecognizedTokensNode(self.start, self.end, self.tokens).fix_source()
+
+
+@dataclass()
+class FunctionParameter:
+    """
+    class the represent result of the parameter parsing
+    """
+    value: NamesNode  # value parsed
+    separator: NamesNode = None  # holds the value and the position of the separator
+
+    def add_sep(self, start, end, tokens):
+        self.separator = NamesNode(start, end, tokens)
+
+    def value_to_unrecognized(self):
+        return UnrecognizedTokensNode(self.value.start, self.value.end, self.value.tokens).fix_source()
+
+    def separator_to_unrecognized(self):
+        if self.separator is None:
+            return None
+        return UnrecognizedTokensNode(self.separator.start, self.separator.end, self.separator.tokens).fix_source()
+
+
+@dataclass
+class FunctionNode(FunctionParserNode):
+    first: NamesNode  # beginning of the function (it should represent the name of the function)
+    last: NamesNode  # last part of the function (it should be the trailing parenthesis)
+    parameters: list
+
+
+class FN(FunctionNode):
+    """
+    Test class only
+    It matches with FunctionNode but with less constraints
+
+    Thereby,
+    FN("first", "last", ["param1," ...]) can be compared to
+    FunctionNode(NamesNode("first"), NamesNode("second"),  [FunctionParameter(NamesNodes("param1"), NamesNodes(", ")])
+
+    Note that FunctionParameter can easily be defined with a single string
+        * "param" -> FunctionParameter(NamesNode("param"), None)
+        * "param, " -> FunctionParameter(NamesNode("param"), NamesNode(", "))
+    For more complicated situations, you can use a tuple (value, sep) to define the value part and the separator part
+    """
+
+    def __init__(self, first, last, parameters):
+        self.first = first
+        self.last = last
+        self.parameters = []
+        for param in parameters:
+            if isinstance(param, tuple):
+                self.parameters.append(param)
+            elif isinstance(param, str) and (pos := param.find(",")) != -1:
+                self.parameters.append((param[:pos], param[pos:]))
+            else:
+                self.parameters.append((param, None))
+
+    def __eq__(self, other):
+        if id(self) == id(other):
+            return True
+
+        if isinstance(other, FN):
+            return self.first == other.first and self.last == other.last and self.parameters == other.parameters
+
+        if isinstance(other, FunctionNode):
+            if self.first != other.first.str_value() or self.last != other.last.str_value():
+                return False
+            if len(self.parameters) != len(other.parameters):
+                return False
+            for self_parameter, other_parameter in zip(self.parameters, other.parameters):
+                value = other_parameter.value.str_value() if isinstance(self_parameter[0],
+                                                                        str) else other_parameter.value
+                sep = other_parameter.separator.str_value() if other_parameter.separator else None
+                if self_parameter[0] != value or self_parameter[1] != sep:
+                    return False
+
+            return True
+
+        return False
+
+    def __hash__(self):
+        return hash((self.first, self.last, self.parameters))
+
+
+class FunctionParser(BaseParser):
+    """
+    The parser will be used to parse func(x, y, z)
+    where x, y and z can be source code, concepts or other functions
+    It will return a  SourceCodeNode or SourceCodeNodeWithConcept
+    """
+
+    def __init__(self, sep=",", longest_concepts_only=True, **kwargs):
+        """
+
+        :param sep:
+        :param longest_concepts_only: When multiples concepts are found, only keep the longest one
+        so 'twenty one' will resolve to [[c:twenty one:]], not [[c:twenty one:], [c:twenty:, c:one:]]
+        :param kwargs:
+        """
+        super().__init__("Function", 55, True)
+        self.sep = sep
+        self.longest_concepts_only = longest_concepts_only
+        self.record_errors = True
+
+    def add_error(self, error, next_token=True):
+        if not self.record_errors:
+            return
+
+        return super().add_error(error, next_token)
+
+    def parse(self, context, parser_input: ParserInput):
+        """
+
+        :param context:
+        :param parser_input:
+        :return:
+        """
+
+        if not isinstance(parser_input, ParserInput):
+            return None
+
+        context.log(f"Parsing '{parser_input}' with FunctionParser", self.name)
+        sheerka = context.sheerka
+
+        if parser_input.is_empty():
+            return sheerka.ret(self.name,
+                               False,
+                               sheerka.new(BuiltinConcepts.IS_EMPTY))
+
+        if not self.reset_parser(context, parser_input):
+            return self.sheerka.ret(
+                self.name,
+                False,
+                context.sheerka.new(BuiltinConcepts.ERROR, body=self.error_sink))
+
+        node = self.parse_function()
+
+        if self.parser_input.next_token():
+            self.add_error(UnexpectedTokenErrorNode("Only one function supported",
+                                                    self.parser_input.token,
+                                                    [TokenKind.EOF]))
+
+        if self.has_error:
+            if node is None:
+                body = context.sheerka.new(BuiltinConcepts.NOT_FOR_ME,
+                                           body=parser_input.as_text(),
+                                           reason=self.error_sink)
+            else:
+                body = context.sheerka.new(BuiltinConcepts.ERROR, body=self.error_sink)
+            return self.sheerka.ret(self.name, False, body)
+
+        source_code_nodes = self.to_source_code_node(node)
+
+        res = []
+        for source_code_node in source_code_nodes:
+            value = self.get_return_value_body(context.sheerka,
+                                               self.parser_input.as_text(),
+                                               source_code_node,
+                                               source_code_node)
+
+            res.append(self.sheerka.ret(self.name, source_code_node.python_node is not None, value))
+
+        return res[0] if len(res) == 1 else res
+
+    def parse_function(self):
+
+        start = self.parser_input.pos
+        token = self.parser_input.token
+        if token.type != TokenKind.IDENTIFIER:
+            self.add_error(UnexpectedTokenErrorNode(f"{token.repr_value} is not a identifier",
+                                                    token,
+                                                    [TokenKind.IDENTIFIER]))
+            return None
+
+        if not self.parser_input.next_token():
+            self.add_error(UnexpectedEof(f"Unexpected EOF while parsing left parenthesis"))
+            return None
+
+        token = self.parser_input.token
+        if token.type != TokenKind.LPAR:
+            self.add_error(UnexpectedTokenErrorNode(f"{token.repr_value} is not a left parenthesis",
+                                                    token,
+                                                    [TokenKind.LPAR]))
+            return None
+
+        start_node = NamesNode(start, start + 1, self.parser_input.tokens[start:start + 2])
+        if not self.parser_input.next_token():
+            self.add_error(UnexpectedEof(f"Unexpected EOF after left parenthesis"))
+            return FunctionNode(start_node, None, None)
+
+        params = self.parse_parameters()
+        if self.has_error:
+            return FunctionNode(start_node, None, params)
+
+        token = self.parser_input.token
+        if token.type != TokenKind.RPAR:
+            self.add_error(UnexpectedTokenErrorNode(f"Right parenthesis not found",
+                                                    token,
+                                                    [TokenKind.RPAR]))
+            return FunctionNode(start_node, None, params)
+
+        return FunctionNode(start_node,
+                            NamesNode(self.parser_input.pos, self.parser_input.pos, [token]),
+                            params)
+
+    def parse_parameters(self):
+        nodes = []
+        while True:
+            param_value = self.parse_parameter_value()
+            if not param_value:
+                break
+
+            function_parameter = FunctionParameter(param_value)
+            nodes.append(function_parameter)
+
+            token = self.parser_input.token
+            if token.type == TokenKind.EOF:
+                self.add_error(UnexpectedEof(f"Unexpected EOF while parsing parameters"))
+                return None
+
+            if token.type == TokenKind.RPAR:
+                break
+
+            if token.value == self.sep:
+                sep_pos = self.parser_input.pos
+                self.parser_input.next_token()
+                function_parameter.add_sep(sep_pos,
+                                           self.parser_input.pos - 1,
+                                           self.parser_input.tokens[sep_pos: self.parser_input.pos])
+
+        return nodes
+
+    def parse_parameter_value(self):
+        # check if the parameter is a function
+        start_pos = self.parser_input.pos
+        self.record_errors = False
+        func = self.parse_function()
+        self.record_errors = True
+        if func:
+            self.parser_input.next_token()
+            return func
+
+        # otherwise, eat until LPAR or separator
+        self.parser_input.seek(start_pos)
+        self.record_errors = True
+        tokens = []
+        while True:
+            token = self.parser_input.token
+            # if token is None:
+            #     break
+
+            if token.value == self.sep or token.type == TokenKind.RPAR:
+                break
+
+            tokens.append(token)
+            if not self.parser_input.next_token(skip_whitespace=False):
+                break
+
+        return NamesNode(start_pos, self.parser_input.pos - 1, tokens) if len(tokens) else None
+
+    def to_source_code_node(self, function_node: FunctionNode):
+        python_parser = PythonWithConceptsParser()
+
+        if len(function_node.parameters) == 0:
+            # validate the source
+            nodes_to_parse = [function_node.first.to_unrecognized(), function_node.last.to_unrecognized()]
+            python_parsing_res = python_parser.parse_nodes(self.context, nodes_to_parse)
+            python_node = python_parsing_res.body.body if python_parsing_res.status else None
+
+            return [SourceCodeNode(start=function_node.first.start,
+                                   end=function_node.last.end,
+                                   tokens=function_node.first.tokens + function_node.last.tokens,
+                                   python_node=python_node,
+                                   return_value=python_parsing_res)]
+
+        def update_source_code_node(scn, nodes, sep):
+            if hasattr(nodes, "__iter__"):
+                for n in nodes:
+                    scn.add_node(n)
+            else:
+                scn.add_node(nodes)
+
+            if sep:
+                scn.add_node(sep.to_unrecognized())
+
+        res = [SourceCodeWithConceptNode(function_node.first.to_unrecognized(), function_node.last.to_unrecognized())]
+        for param in function_node.parameters:
+            if isinstance(param.value, NamesNode):
+                unrecognized = param.value.to_unrecognized()
+                # try to recognize concepts
+                nodes_sequences = get_lexer_nodes_from_unrecognized(self.context,
+                                                                    unrecognized,
+                                                                    PARSERS)
+            else:
+                # the parameter is also a function
+                nodes_sequences = self.to_source_code_node(param.value)
+
+            if self.longest_concepts_only:
+                nodes_sequences = self.get_longest_concepts(nodes_sequences)
+
+            if nodes_sequences is None:
+                # no concept found
+                for source_code_node in res:
+                    update_source_code_node(source_code_node, unrecognized, param.separator)
+
+            elif len(nodes_sequences) == 1:
+                # only one result
+                # It is the same code than when there are multiple results
+                # But here, we save the creation of the tmp_res object (not sure it worth it)
+                for source_code_node in res:
+                    update_source_code_node(source_code_node, nodes_sequences[0], param.separator)
+            else:
+                # multiple result, make the cartesian product
+                tmp_res = []
+                for source_code_node in res:
+                    instances = get_n_clones(source_code_node, len(nodes_sequences))
+                    tmp_res.extend(instances)
+                    for instance, node_sequence in zip(instances, nodes_sequences):
+                        update_source_code_node(instance, node_sequence, param.separator)
+                res = tmp_res
+
+        # check if it is a valid source code
+        for source_code_node in res:
+            source_code_node.fix_all_pos()
+            source_code_node.pseudo_fix_source()
+
+            python_parsing_res = python_parser.parse_nodes(self.context, source_code_node.get_all_nodes())
+            if python_parsing_res.status:
+                source_code_node.python_node = python_parsing_res.body.body
+                source_code_node.return_value = python_parsing_res
+
+                # make sure that concepts found can be evaluated
+                errors = []
+                for c in source_code_node.python_node.concepts.values():
+                    update_compiled(self.context, c, errors)
+
+        return res
+
+    @staticmethod
+    def get_longest_concepts(nodes_sequences):
+        """
+        The longest sequences are the ones that have the less number of concepts
+        For example
+        'twenty one' resolves to
+            [c:twenty one:]
+            [c:twenty:, c:one:]
+        [c:twenty one:] has only one concept, so it's the longest one (two tokens against one token twice)
+        :param nodes_sequences:
+        :return:
+        """
+        if nodes_sequences is None:
+            return None
+
+        res = []
+        min_len = -1
+        for current_sequence in nodes_sequences:
+            # awful hack to remove when NodeSequence and ConceptSequence will be implemented
+            current_len = len(current_sequence) if hasattr(current_sequence, "__len__") else 1
+            if len(res) == 0:
+                res.append(current_sequence)
+                min_len = current_len
+            elif current_len == min_len:
+                res.append(current_sequence)
+            elif current_len < min_len:
+                res.clear()
+                res.append(current_sequence)
+                min_len = current_len
+
+        return res

src/parsers/PythonParser.py

@@ -4,9 +4,8 @@ from dataclasses import dataclass
 
 import core.utils
 from core.builtin_concepts import BuiltinConcepts
-from core.sheerka.services.SheerkaExecute import ParserInput, SheerkaExecute
+from core.sheerka.services.SheerkaExecute import ParserInput
 from core.tokenizer import LexerError, TokenKind
-from parsers.BaseNodeParser import ConceptNode
 from parsers.BaseParser import BaseParser, Node, ErrorNode
 
 log = logging.getLogger(__name__)
@@ -70,87 +69,6 @@ class PythonGetNamesVisitor(ast.NodeVisitor):
         self.names.add(node.id)
 
 
-class LexerNodeParserHelperForPython:
-    """Helper class to parse mix of concepts and Python"""
-
-    def __init__(self):
-        self.identifiers = {}  # cache for already created identifier (the key is id(concept))
-        self.identifiers_key = {}  # number of identifiers with the same root (prefix)
-
-    def _get_identifier(self, concept):
-        """
-        Get an identifier for a concept.
-        Make sure to return the same identifier if the same concept
-        Make sure to return a different identifier if same name but different concept
-
-        Internal function because I don't want identifiers, identifiers_key and python_ids_mappings
-        to be instance variables
-        I would like to keep this parser as stateless as possible
-        :param concept:
-        :return:
-        """
-        if id(concept) in self.identifiers:
-            return self.identifiers[id(concept)]
-
-        identifier = "__C__" + self._sanitize(concept.key or concept.name)
-        if concept.id:
-            identifier += "__" + concept.id
-
-        if identifier in self.identifiers_key:
-            self.identifiers_key[identifier] += 1
-            identifier += f"_{self.identifiers_key[identifier]}"
-        else:
-            self.identifiers_key[identifier] = 0
-
-        identifier += "__C__"
-
-        self.identifiers[id(concept)] = identifier
-        return identifier
-
-    @staticmethod
-    def _sanitize(identifier):
-        res = ""
-        for c in identifier:
-            res += c if c.isalnum() else "0"
-        return res
-
-    def parse(self, context, nodes):
-        source = ""
-        to_parse = ""
-
-        concepts = {}  # the key is the Python identifier
-
-        for node in nodes:
-            if isinstance(node, ConceptNode):
-                source += node.source
-                if to_parse:
-                    to_parse += " "
-                concept = node.concept
-                python_id = self._get_identifier(concept)
-                to_parse += python_id
-                concepts[python_id] = concept
-            else:
-                source += node.source
-                to_parse += node.source
-
-        with context.push(BuiltinConcepts.PARSE_CODE,
-                          {"language": "Python", "source": to_parse},
-                          desc="Trying Python for '" + to_parse + "'") as sub_context:
-            sub_context.add_inputs(to_parse=to_parse)
-            python_parser = PythonParser()
-            parser_input = context.sheerka.services[SheerkaExecute.NAME].get_parser_input(to_parse)
-            result = python_parser.parse(sub_context, parser_input)
-            sub_context.add_values(return_values=result)
-
-        if result.status:
-            python_node = result.body.body
-            python_node.source = source
-            python_node.concepts = concepts
-            return python_node
-
-        return result.body  # the error
-
-
 class PythonParser(BaseParser):
     """
     Parse Python scripts

src/parsers/PythonWithConceptsParser.py

@@ -1,8 +1,8 @@
 from core.builtin_concepts import BuiltinConcepts
 from core.sheerka.services.SheerkaExecute import SheerkaExecute
+from parsers.BaseNodeParser import ConceptNode
 from parsers.BaseNodeParser import SourceCodeWithConceptNode
 from parsers.BaseParser import BaseParser
-from parsers.BaseNodeParser import ConceptNode
 from parsers.PythonParser import PythonParser
 from parsers.UnrecognizedNodeParser import UnrecognizedNodeParser
 
@@ -12,8 +12,6 @@ unrecognized_nodes_parser = UnrecognizedNodeParser()
 class PythonWithConceptsParser(BaseParser):
     def __init__(self, **kwargs):
         super().__init__("PythonWithConcepts", 20)
-        self.identifiers = None
-        self.identifiers_key = None
 
     @staticmethod
     def sanitize(identifier):
@@ -33,11 +31,15 @@ class PythonWithConceptsParser(BaseParser):
                 yield node
 
     def parse(self, context, parser_input):
-        sheerka = context.sheerka
         nodes = self.get_input_as_lexer_nodes(parser_input, unrecognized_nodes_parser)
+        return self.parse_nodes(context, nodes)
+
+    def parse_nodes(self, context, nodes):
         if not nodes:
             return None
 
+        sheerka = context.sheerka
+
         source = ""
         to_parse = ""
         identifiers = {}

src/parsers/SyaNodeParser.py

@@ -5,10 +5,12 @@ from typing import List
 
 from core import builtin_helpers
 from core.builtin_concepts import BuiltinConcepts
+from core.builtin_helpers import parse_function
 from core.concept import Concept, DEFINITION_TYPE_BNF
 from core.sheerka.services.SheerkaComparisonManager import SheerkaComparisonManager
 from core.sheerka.services.SheerkaExecute import ParserInput
 from core.tokenizer import Token, TokenKind, Tokenizer
+from core.utils import get_n_clones
 from parsers.BaseNodeParser import UnrecognizedTokensNode, ConceptNode, SourceCodeNode, SyaAssociativity, \
     SourceCodeWithConceptNode, BaseNodeParser
 from parsers.BaseParser import ErrorNode
@@ -17,39 +19,73 @@ PARSERS = ["BnfNode", "AtomNode", "Python"]
 
 function_parser_res = namedtuple("FunctionParserRes", 'to_out function')
 
+DEBUG_PUSH = "PUSH"
+DEBUG_PUSH_UNREC = "PUSH_UNREC"
+DEBUG_POP = "POP"
+DEBUG_EAT = "EAT"
+DEBUG_RECOG = "RECOG"
+
+
+@dataclass()
+class DebugInfo:
+    """
+    Debug item to trace how the sya parser worked
+    Possible action:
+    PUSH: push the token or the concept to the stack
+    PUSH_UNREC: push the token to the UnrecognizedTokensNode
+    POP: pop item to out
+    EAT: eat the current token (it means that it was part of the concept currently being parsed)
+    RECOG: when tokens from UnrecognizedTokensNode are parsed and recognized
+    """
+    pos: int = -1  # position of the parser input
+    token: Token = None  # current token
+    concept: Concept = None  # current concept if ay
+    action: str = None  # action taken
+
+    def __repr__(self):
+        token_repr = self.token.repr_value if isinstance(self.token, Token) else self.token
+        msg = f"{self.pos:3}:{token_repr}" if self.pos != -1 else "  _:"
+        if self.concept:
+            msg += f"({self.concept})"
+        return msg + f" => {self.action}"
+
 
 class ParenthesisMismatchErrorNode(ErrorNode):
 
     def __init__(self, error_int):
         if isinstance(error_int, tuple):
-            self.token = error_int[0]
+            if isinstance(error_int[0], Token):
+                self.token_value = error_int[0].value
+                self.token = error_int[0]
+            else:
+                self.token_value = error_int[0]
+                self.token = None
             self.pos = error_int[1]
         elif isinstance(error_int, Token):
             self.token = error_int
+            self.token_value = error_int.value
             self.pos = -1
         else:  # isinstance(UnrecognizedTokensNode)
             for i, t in reversed(list(enumerate(error_int.tokens))):
                 if t.type == TokenKind.LPAR:
                     self.token = t
+                    self.token_value = t.value
                     self.pos = i + error_int.start
 
     def __eq__(self, other):
         if id(self) == id(other):
             return True
 
-        if isinstance(other, tuple):
-            return other[0] == self.token.value and other[1] == self.pos
-
         if not isinstance(other, ParenthesisMismatchErrorNode):
             return False
 
-        return self.token == other.token and self.pos == other.pos
+        return self.token_value == other.token_value and self.pos == other.pos
 
     def __hash__(self):
         return hash(self.pos)
 
     def __repr__(self):
-        return f"ParenthesisMismatchErrorNode('{self.token.value}', {self.pos}"
+        return f"ParenthesisMismatchErrorNode('{self.token_value}', {self.pos}"
 
 
 @dataclass()
@@ -211,8 +247,9 @@ class SyaConceptParserHelper:
 
 
 class InFixToPostFix:
-    def __init__(self, context):
+    def __init__(self, context, debug_enabled=False):
         self.context = context
+        self.debug_enabled = debug_enabled
 
         self.is_locked = False  # when locked, cannot process input
 
@@ -227,6 +264,8 @@ class InFixToPostFix:
         self.false_positives = []  # concepts that looks like known one, but not (for debug purpose)
         self.forked = []  # use to fork InFixToPostFix when multiple parsers recognize the unrecognized_tokens
 
+        self.parsing_function = False  # indicate that we are currently parsing a function
+
     def __repr__(self):
         return f"InFixToPostFix({self.debug})"
 
@@ -243,6 +282,8 @@ class InFixToPostFix:
         return len(self.sequence) + len(self.errors)
 
     def _add_error(self, error):
+        if self.debug_enabled:
+            self.debug.append(DebugInfo(action=f"=> ERROR {error}"))
         self.errors.append(error)
 
     def _is_lpar(self, token):
@@ -294,7 +335,11 @@ class InFixToPostFix:
                 item.error = "Not enough suffix parameters"
             else:
                 item.error = f"token '{item.expected[0].strip_quote}' not found"
+            if self.debug_enabled:
+                self.debug.append(DebugInfo(action=f"ERROR {item.error}"))
 
+        if self.debug_enabled:
+            self.debug.append(DebugInfo(action=f"{DEBUG_POP} {item}"))
         if isinstance(item, SyaConceptParserHelper) and item.potential_pos != -1:
             self.out.insert(item.potential_pos, item)
         else:
@@ -345,6 +390,26 @@ class InFixToPostFix:
         for i, token in enumerate(parser_helper.tokens):
             self.unrecognized_tokens.add_token(token, parser_helper.start + i)
 
+    def _remove_debug_info_if_needed(self):
+        """
+        Before trying to manage the unrecognized, a line is added to explain the token which has triggered
+        the recognition try
+        This line is useless if self.unrecognized_tokens was irrelevant
+        :return:
+        """
+        if len(self.debug) > 0 and self.debug[-1].action == "??":
+            self.debug.pop()
+
+    def _debug_nodes(self, nodes_sequences):
+        res = "["
+        first = True
+        for sequence in nodes_sequences:
+            if not first:
+                res += ", "
+            res += "[" + ", ".join([n.to_short_str() for n in sequence]) + "]"
+            first = False
+        return res + "]"
+
     def get_errors(self):
         def has_error(item):
             if isinstance(item, SyaConceptParserHelper) and item.error:
@@ -439,41 +504,40 @@ class InFixToPostFix:
 
         self.unrecognized_tokens.fix_source()
 
-        # try to recognize concepts
-        nodes_sequences = builtin_helpers.get_lexer_nodes_from_unrecognized(
-            self.context,
-            self.unrecognized_tokens,
-            PARSERS)
-
-        if nodes_sequences:
-            # There are more than one solution found
-            # In the case, we create a new InfixToPostfix for each new possibility
-            if len(nodes_sequences) > 1:
-                for node_sequence in nodes_sequences[1:]:
-                    clone = self.clone()
-                    for node in node_sequence:
-                        clone._put_to_out(node)
-                    clone.unrecognized_tokens = UnrecognizedTokensNode(-1, -1, [])
-                    self.forked.append(clone)
-
-            # Do not forget the first result that will go with the current InfixToPostfix
-            for node in nodes_sequences[0]:
-                self._put_to_out(node)
-        else:
+        if self.unrecognized_tokens.parenthesis_count > 0:
+            # parenthesis mismatch detected, do not try to resolve the unrecognized
+            self._add_error(ParenthesisMismatchErrorNode(self.unrecognized_tokens))
             self._put_to_out(self.unrecognized_tokens)
+        else:
+            # try to recognize concepts
+            nodes_sequences = builtin_helpers.get_lexer_nodes_from_unrecognized(
+                self.context,
+                self.unrecognized_tokens,
+                PARSERS)
 
-        # # try to recognize concepts
-        # nodes = self._get_lexer_nodes_from_unrecognized()
-        # if nodes:
-        #     for node in nodes:
-        #         self._put_to_out(node)
-        # else:
-        #     self._put_to_out(self.unrecognized_tokens)
+            if nodes_sequences:
+                # There are more than one solution found
+                # In the case, we create a new InfixToPostfix for each new possibility
+                if self.debug_enabled:
+                    self.debug.append(DebugInfo(action=f"{DEBUG_RECOG} {self._debug_nodes(nodes_sequences)}"))
+                if len(nodes_sequences) > 1:
+                    for node_sequence in nodes_sequences[1:]:
+                        clone = self.clone()
+                        for node in node_sequence:
+                            clone._put_to_out(node)
+                        clone.unrecognized_tokens = UnrecognizedTokensNode(-1, -1, [])
+                        self.forked.append(clone)
+
+                # Do not forget the first result that will go with the current InfixToPostfix
+                for node in nodes_sequences[0]:
+                    self._put_to_out(node)
+            else:
+                self._put_to_out(self.unrecognized_tokens)
 
         # create another instance
         self.unrecognized_tokens = UnrecognizedTokensNode(-1, -1, [])
 
-    def get_functions_from_unrecognized(self, token, pos):
+    def get_functions_names_from_unrecognized(self, token, pos):
         """
         The unrecognized ends with an lpar '('
         It means that its a function like foo(something)
@@ -489,19 +553,32 @@ class InFixToPostFix:
             self.context,
             self.unrecognized_tokens,
             PARSERS)
-        if nodes_sequences is None:
-            return None
+
+        if not nodes_sequences:
+            nodes_sequences = [[self.unrecognized_tokens.clone()]]
 
         res = []
         for sequence in nodes_sequences:
-            if isinstance(sequence[-1], UnrecognizedTokensNode):
-                function = sequence[-1]
-            else:
-                function = UnrecognizedTokensNode(sequence[-1].start, sequence[-1].end, sequence[-1].tokens)
-            function.add_token(token, pos).fix_source()
+            last_node = sequence[-1]
 
-            res.append(function_parser_res(sequence[:-1], function))
+            if len(last_node.tokens) > 1:
+                if isinstance(last_node, UnrecognizedTokensNode):
+                    to_out = [UnrecognizedTokensNode(last_node.start, pos - 2, last_node.tokens[:-1]).fix_source()]
+                    function_name = UnrecognizedTokensNode(pos - 1, pos - 1, [last_node.tokens[-1]])
+                    function_name.add_token(token, pos)
+                else:
+                    to_out = [last_node.fix_source()]
+                    function_name = None
 
+            else:  # len(last_node.tokens) == 1
+                if not isinstance(last_node, UnrecognizedTokensNode):
+                    function_name = UnrecognizedTokensNode(last_node.start, last_node.end, last_node.tokens)
+                else:
+                    function_name = last_node
+                function_name.add_token(token, pos)
+                to_out = []
+
+            res.append(function_parser_res(sequence[:-1] + to_out, function_name))
         return res
 
     def pop_stack_to_out(self):
@@ -614,6 +691,8 @@ class InFixToPostFix:
                     self.unrecognized_tokens.pop(TokenKind.WHITESPACE)
 
                 current_concept.end = pos
+                if self.debug_enabled:
+                    self.debug.append(DebugInfo(pos, token, None, "??"))
                 self.manage_unrecognized()
                 # manage that some clones may have been forked
                 for forked in self.forked:
@@ -673,17 +752,53 @@ class InFixToPostFix:
         if self.is_locked:
             return
 
+        if self.parsing_function:
+            if self.debug_enabled:
+                self.debug.append(DebugInfo(pos, token, None, DEBUG_PUSH_UNREC))
+
+            self.unrecognized_tokens.add_token(token, pos)
+
+            if self.unrecognized_tokens.parenthesis_count == 0:
+                self.unrecognized_tokens.fix_source()
+                res = parse_function(self.context,
+                                     self.unrecognized_tokens.source,
+                                     self.unrecognized_tokens.tokens[:],
+                                     self.unrecognized_tokens.start)
+
+                instances = get_n_clones(self, len(res))
+                self.forked.extend(instances[1:])
+                for instance, res_i in zip(instances, res):
+
+                    if res_i.status or instance.context.sheerka.isinstance(res_i.body, BuiltinConcepts.PARSER_RESULT):
+                        # 1. we manage to recognize a function
+                        # 2. we almost manage, ex func(one two). It's not a function but almost
+                        instance._put_to_out(res_i.body.body)
+                        instance.unrecognized_tokens.reset()
+                    else:
+                        # it is not a function, try to recognized the token
+                        # This situation is unlikely to occur
+                        instance.manage_unrecognized()
+
+                    instance.parsing_function = False
+
+            return True
+
         if self.handle_expected_token(token, pos):
             # a token is found, let's check if it's part of a concepts being parsed
             # example Concept(name="foo", definition="foo a bar b").def_var("a").def_var("b")
             # if the token 'bar' is found, it has to be considered as part of the concept foo
-            self.debug.append(token)
+            if self.debug_enabled:
+                self._remove_debug_info_if_needed()
+                self.debug.append(DebugInfo(pos, token, None, DEBUG_EAT))
             return True
 
         elif self._is_lpar(token):
-            self.debug.append(token)
+
+            if self.debug_enabled:
+                self.debug.append(DebugInfo(pos, token, None, DEBUG_PUSH_UNREC))
 
             if self.unrecognized_tokens.is_empty() or self.unrecognized_tokens.is_whitespace():
+
                 # first, remove what was in the buffer
                 self.manage_unrecognized()
                 for forked in self.forked:
@@ -691,40 +806,65 @@ class InFixToPostFix:
                     forked.eat_token(token, pos)
 
                 self.stack.append((token, pos))
+
             else:
                 # the parenthesis is part of the unrecognized
-                # So it's a function
+                # So it's maybe a function call
 
-                list_of_results = self.get_functions_from_unrecognized(token, pos)
-                if list_of_results:
-                    instances = [self]
-                    for i in range(len(list_of_results) - 1):
-                        clone = self.clone()
-                        self.forked.append(clone)
-                        instances.append(clone)
+                list_of_results = self.get_functions_names_from_unrecognized(token, pos)
+                instances = [self]
+                for i in range(len(list_of_results) - 1):
+                    clone = self.clone()
+                    self.forked.append(clone)
+                    instances.append(clone)
 
-                    # Manage the result for self and its clones
-                    for instance, parsing_res in zip(instances, list_of_results):
-                        for to_out in parsing_res.to_out:
-                            instance._put_to_out(to_out)
+                # Manage the result for self and its clones
+                for instance, parsing_res in zip(instances, list_of_results):
+
+                    for to_out in parsing_res.to_out:
+                        instance._put_to_out(to_out)
+
+                    if parsing_res.function:
+                        instance.unrecognized_tokens = parsing_res.function
+                        instance.parsing_function = True
+                    else:
+                        # special case of "twenty two(". It's not considered as a function
+                        # The manage_unrecognized() what somewhat done by get_functions_names_from_unrecognized()
+                        # So we just put the unrecognized to out
+
+                        instance.unrecognized_tokens.reset()
 
                         # make sure to pop the current concept
                         if self._stack_isinstance(SyaConceptParserHelper):
                             self.pop_stack_to_out()
 
-                        instance._put_to_out(")")  # mark where the function should end
-                        instance.stack.append(parsing_res.function)
-                        instance.unrecognized_tokens = UnrecognizedTokensNode(-1, -1, [])  # reset unrecognized
-                else:
-                    self._put_to_out(")")  # mark where the function should end
-                    self.eat_unrecognized(token, pos)  # add the '(' to the rest of the unknown
-                    self.stack.append(self.unrecognized_tokens.fix_source())
-                    self.unrecognized_tokens = UnrecognizedTokensNode(-1, -1, [])
+                        instance.stack.append((token, pos))
+
+                #         # instance._put_to_out(")")  # mark where the function should end
+                #         # instance.stack.append(parsing_res.function)
+                #         # instance.unrecognized_tokens = UnrecognizedTokensNode(-1, -1, [])  # reset unrecognized
+                # else:
+                #     # handle when there are multiple pending tokens
+                #     if len(self.unrecognized_tokens.tokens) > 1:
+                #         unrecognized = UnrecognizedTokensNode(self.unrecognized_tokens.start,
+                #                                               pos - 2,
+                #                                               self.unrecognized_tokens.tokens[:-1])
+                #         unrecognized.fix_source()
+                #         self._put_to_out(unrecognized)
+                #         last_token = self.unrecognized_tokens.tokens[-1]
+                #         self.unrecognized_tokens.reset()
+                #         self.unrecognized_tokens.add_token(last_token, pos - 1)
+                #
+                #     self.eat_unrecognized(token, pos)  # add the '(' to the rest of the unknown
+                #     self.parsing_function = True
+                #     # self.stack.append(self.unrecognized_tokens.fix_source())
+                #     # self.unrecognized_tokens = UnrecognizedTokensNode(-1, -1, [])
 
             return True
 
         elif self._is_rpar(token):
-            self.debug.append(token)
+            if self.debug_enabled:
+                self.debug.append(DebugInfo(pos, token, None, DEBUG_EAT))
 
             # first, remove what was in the buffer
             self.manage_unrecognized()
@@ -775,32 +915,36 @@ class InFixToPostFix:
 
         return False
 
-    def eat_concept(self, sya_concept_def, token, pos):
+    def eat_concept(self, sya_concept_def, token, pos, first_pass=True):
         """
         a concept is found
         :param sya_concept_def:
         :param token:
         :param pos:
+        :param first_pass: When not called from a fork after manage_unrecognized()
         :return:
         """
 
         if self.is_locked:
             return
-        self.debug.append(sya_concept_def)
 
         parser_helper = SyaConceptParserHelper(sya_concept_def, pos)
 
-        if self.unrecognized_tokens.last_token_type() == TokenKind.WHITESPACE:
-            parser_helper.remember_whitespace = self.unrecognized_tokens.tokens[-1]
+        if first_pass:
+            if self.debug_enabled:
+                self.debug.append(DebugInfo(pos, token, sya_concept_def, "??"))
 
-        if Token.is_whitespace(parser_helper.last_token_before_first_token):
-            self.unrecognized_tokens.pop(TokenKind.WHITESPACE)
+            if self.unrecognized_tokens.last_token_type() == TokenKind.WHITESPACE:
+                parser_helper.remember_whitespace = self.unrecognized_tokens.tokens[-1]
 
-        # First, try to recognize the tokens that are waiting
-        self.manage_unrecognized()
-        for forked in self.forked:
-            # manage the fact that some clone may have been forked
-            forked.eat_concept(sya_concept_def, token, pos)
+            if Token.is_whitespace(parser_helper.last_token_before_first_token):
+                self.unrecognized_tokens.pop(TokenKind.WHITESPACE)
+
+            # First, try to recognize the tokens that are waiting
+            self.manage_unrecognized()
+            for forked in self.forked:
+                # manage the fact that some clone may have been forked
+                forked.eat_concept(sya_concept_def, token, pos, first_pass=False)
 
         # then, check if this new concept is linked to the previous ones
         # ie, is the previous concept fully matched ?
@@ -823,6 +967,9 @@ class InFixToPostFix:
                 self.manage_parameters_when_new_concept(parser_helper)
                 self._put_to_out(parser_helper.fix_concept())
             else:
+                if self.debug_enabled:
+                    self._remove_debug_info_if_needed()
+                    self.debug.append(DebugInfo(pos, token, sya_concept_def, DEBUG_PUSH))
                 self.stack.append(parser_helper)
                 self.manage_parameters_when_new_concept(parser_helper)
 
@@ -836,11 +983,12 @@ class InFixToPostFix:
         if self.is_locked:
             return
 
-        self.debug.append(token)
+        if self.debug_enabled:
+            self.debug.append(DebugInfo(pos, token, None, DEBUG_PUSH_UNREC))
 
         self.unrecognized_tokens.add_token(token, pos)
 
-    def finalize(self):
+    def finalize(self, pos):
         """
         Put the remaining items from the stack to out
         :return:
@@ -850,8 +998,14 @@ class InFixToPostFix:
             return
 
         if len(self.stack) == 0 and len(self.out) == 0:
+            # check for parenthesis mismatch
+            if self.unrecognized_tokens.parenthesis_count > 0:
+                self._add_error(ParenthesisMismatchErrorNode(self.unrecognized_tokens))
             return  # no need to pop the buffer, as no concept is found
 
+        if self.debug_enabled:
+            self.debug.append(DebugInfo(pos, "<EOF>", None, "??"))
+
         while len(self.stack) > 0:
             parser_helper = self.stack[-1]
 
@@ -863,7 +1017,7 @@ class InFixToPostFix:
             self.manage_unrecognized()
             for forked in self.forked:
                 # manage that some clones may have been forked
-                forked.finalize()
+                forked.finalize(pos)
 
             failed_to_match = sum(map(lambda e: e.type != TokenKind.VAR_DEF, parser_helper.expected))
             if failed_to_match > 0:
@@ -878,10 +1032,10 @@ class InFixToPostFix:
         self.manage_unrecognized()
         for forked in self.forked:
             # manage that some clones may have been forked
-            forked.finalize()
+            forked.finalize(pos)
 
     def clone(self):
-        clone = InFixToPostFix(self.context)
+        clone = InFixToPostFix(self.context, self.debug_enabled)
         clone.is_locked = self.is_locked
         clone.out = self.out[:]
         clone.stack = [i.clone() if hasattr(i, "clone") else i for i in self.stack]
@@ -983,7 +1137,7 @@ class SyaNodeParser(BaseNodeParser):
                 res.extend(forked)
                 forked.clear()
 
-        res = [InFixToPostFix(context)]
+        res = [InFixToPostFix(context, context.in_context(BuiltinConcepts.DEBUG))]
         while self.parser_input.next_token(False):
             for infix_to_postfix in res:
                 infix_to_postfix.reset()
@@ -1027,7 +1181,7 @@ class SyaNodeParser(BaseNodeParser):
         # make sure that remaining items in stack are moved to out
         for infix_to_postfix in res:
             infix_to_postfix.reset()
-            infix_to_postfix.finalize()
+            infix_to_postfix.finalize(self.parser_input.pos)
         _add_forked_to_res()
 
         return res
@@ -1058,14 +1212,14 @@ class SyaNodeParser(BaseNodeParser):
         start = item.start
         end = item.end
         has_unrecognized = False
-        concept = sheerka.new_from_template(item.concept, item.concept.id)
+        concept = sheerka.new_from_template(item.concept, item.concept.key)
         for param_index in reversed(range(len(concept.metadata.variables))):
             inner_item = self.postfix_to_item(sheerka, postfixed)
             if inner_item.start < start:
                 start = inner_item.start
             if inner_item.end > end:
                 end = inner_item.end
-            has_unrecognized |= isinstance(inner_item, UnrecognizedTokensNode)
+            has_unrecognized |= isinstance(inner_item, (UnrecognizedTokensNode, SourceCodeWithConceptNode))
 
             param_name = concept.metadata.variables[param_index][0]
             param_value = inner_item.concept if hasattr(inner_item, "concept") else \
@@ -1128,6 +1282,7 @@ class SyaNodeParser(BaseNodeParser):
             if has_unrecognized:
                 # Manage some sick cases where missing parenthesis mess the order or the sequence
                 # example "foo bar(one plus two"
+                # too lazy to fix the why...
                 sequence.sort(key=attrgetter("start"))
 
             ret.append(

src/parsers/UnrecognizedNodeParser.py

@@ -2,7 +2,7 @@ from dataclasses import dataclass
 
 import core.utils
 from core.builtin_concepts import BuiltinConcepts
-from core.builtin_helpers import only_successful, parse_unrecognized, get_lexer_nodes
+from core.builtin_helpers import only_successful, parse_unrecognized, get_lexer_nodes, update_compiled
 from core.concept import Concept
 from parsers.BaseNodeParser import ConceptNode, UnrecognizedTokensNode, SourceCodeNode, SourceCodeWithConceptNode
 from parsers.BaseParser import BaseParser, ErrorNode
@@ -38,6 +38,7 @@ class UnrecognizedNodeParser(BaseParser):
 
         sequences_found = [[]]
         has_unrecognized = False
+        self.error_sink.clear()
 
         for node in nodes:
             if isinstance(node, ConceptNode):
@@ -93,7 +94,7 @@ class UnrecognizedNodeParser(BaseParser):
                     sheerka.new(
                         BuiltinConcepts.PARSER_RESULT,
                         parser=self,
-                        source=parser_input,
+                        source=parser_input.source,
                         body=choice,
                         try_parsed=choice)))
 
@@ -105,56 +106,8 @@ class UnrecognizedNodeParser(BaseParser):
             return ret
 
     def validate_concept_node(self, context, concept_node):
-
-        sheerka = context.sheerka
         errors = []
-
-        def _validate_concept(concept):
-            """
-            Recursively browse the compiled properties in order to find unrecognized
-            :param concept:
-            :return:
-            """
-            for k, v in concept.compiled.items():
-                if isinstance(v, Concept):
-                    _validate_concept(v)
-
-                elif isinstance(v, UnrecognizedTokensNode):
-                    res = parse_unrecognized(context, v.source, PARSERS)
-                    res = only_successful(context, res)  # only key successful parsers
-                    if res.status:
-                        concept.compiled[k] = res.body.body
-                    else:
-                        errors.append(sheerka.new(BuiltinConcepts.ERROR, body=f"Cannot parse '{v.source}'"))
-
-        def _get_source(compiled, var_name):
-            if var_name not in compiled:
-                return None
-            if not isinstance(compiled[var_name], list):
-                return None
-            if not len(compiled[var_name]) == 1:
-                return None
-            if not sheerka.isinstance(compiled[var_name][0], BuiltinConcepts.RETURN_VALUE):
-                return None
-            if not sheerka.isinstance(compiled[var_name][0].body, BuiltinConcepts.PARSER_RESULT):
-                return None
-            if compiled[var_name][0].body.name == "parsers.ShortTermMemory":
-                return None
-
-            return compiled[var_name][0].body.source
-
-        _validate_concept(concept_node.concept)
-
-        # Special case where the values of the variables are the names of the variable
-        # example : Concept("a plus b").def_var("a").def_var("b")
-        # and the user has entered 'a plus b'
-        # Chances are that we are talking about the concept itself, and not an instantiation (like '10 plus 2')
-        # This means that 'a' and 'b' don't have any real value
-        for name, value in concept_node.concept.metadata.variables:
-            if not _get_source(concept_node.concept.compiled, name) == name:
-                break
-        else:
-            concept_node.concept.metadata.is_evaluated = True
+        update_compiled(context, concept_node.concept, errors)
 
         if len(errors) > 0:
             return context.sheerka.ret(self.name, False, errors)

src/repl/SheerkaPromptCompleter.py

@@ -173,8 +173,11 @@ class SheerkaPromptCompleter(Completer):
                 break
 
         m = NAME.match(text[:i][::-1])
-        func_name = m.group(0)[::-1]
-        return FuncFound(func_name, i - len(func_name), paren_index) if m else None
+        if m:
+            func_name = m.group(0)[::-1]
+            return FuncFound(func_name, i - len(func_name), paren_index)
+
+        return None
 
     @staticmethod
     def after_pipe(text, pos):

tests/core/test_SheerkaEvaluateConcept.py

@@ -88,6 +88,15 @@ class TestSheerkaEvaluateConcept(TestUsingMemoryBasedSheerka):
         assert evaluated.variables() == {"a": Property("a", expected)}
         assert evaluated.metadata.is_evaluated
 
+    def test_i_can_evaluate_when_the_body_is_the_name_of_the_concept(self):
+        # to prove that I can distinguish from a string
+        sheerka, context, concept = self.init_concepts(Concept("foo", body="'foo'"), eval_body=True, create_new=True)
+
+        evaluated = sheerka.evaluate_concept(context, concept)
+
+        assert evaluated.key == concept.key
+        assert evaluated.body == "foo"
+
     def test_i_can_evaluate_metadata_using_do_not_resolve(self):
         sheerka, context, concept = self.init_concepts(Concept("foo"), eval_body=True)
         concept.compiled[ConceptParts.BODY] = DoNotResolve("do not resolve")

tests/core/test_tokenizer.py

@@ -1,5 +1,5 @@
 import pytest
-from core.tokenizer import Tokenizer, Token, TokenKind, LexerError, Keywords
+from core.tokenizer import Tokenizer, Token, TokenKind, LexerError
 
 
 def test_i_can_tokenize():
@@ -156,19 +156,6 @@ def test_i_can_parse_numbers(text):
     assert tokens[0].value == text
 
 
-@pytest.mark.parametrize("text, expected", [
-    ("def", Keywords.DEF),
-    ("concept", Keywords.CONCEPT),
-    ("as", Keywords.AS),
-    ("pre", Keywords.PRE),
-    ("post", Keywords.POST)
-])
-def test_i_can_recognize_keywords(text, expected):
-    tokens = list(Tokenizer(text))
-    assert tokens[0].type == TokenKind.KEYWORD
-    assert tokens[0].value == expected
-
-
 @pytest.mark.parametrize("text, expected", [
     ("c:key:", ("key", None)),
     ("c:key|id:", ("key", "id")),

tests/evaluators/test_LexerNodeEvaluator.py

@@ -27,7 +27,7 @@ class TestLexerNodeEvaluator(TestUsingMemoryBasedSheerka):
         for fragment in fragments:
             if isinstance(fragment, str):
                 node = PythonNode(fragment, ast.parse(fragment.strip(), mode="eval"))
-                nodes.append(SourceCodeNode(node, 0, 0, [], fragment))
+                nodes.append(SourceCodeNode(0, 0, [], fragment, node))
             else:
                 nodes.append(ConceptNode(fragment, 0, 0, [], fragment.name))
 
@@ -82,10 +82,9 @@ class TestLexerNodeEvaluator(TestUsingMemoryBasedSheerka):
         wrapper = result.body
         return_value = result.body.body
 
-        assert result.who == evaluator.name
+        assert result.who == "parsers.PythonWithConcepts"
         assert result.status
         assert context.sheerka.isinstance(wrapper, BuiltinConcepts.PARSER_RESULT)
-        assert wrapper.parser == evaluator
         assert wrapper.source == "foo + 1"
 
         assert return_value == PythonNode('foo + 1', ast.parse("__C__foo__C__ + 1", mode="eval"))

tests/evaluators/test_PythonEvaluator.py

@@ -1,8 +1,12 @@
+import ast
+
 import pytest
 from core.builtin_concepts import ReturnValueConcept, ParserResultConcept, BuiltinConcepts
 from core.concept import Concept, CB, NotInit
 from core.sheerka.services.SheerkaExecute import ParserInput
+from core.tokenizer import Tokenizer
 from evaluators.PythonEvaluator import PythonEvaluator, PythonEvalError
+from parsers.BaseNodeParser import SourceCodeNode, SourceCodeWithConceptNode
 from parsers.PythonParser import PythonNode, PythonParser
 
 from tests.TestUsingMemoryBasedSheerka import TestUsingMemoryBasedSheerka
@@ -12,10 +16,28 @@ def get_concept_name(concept):
     return concept.name
 
 
+def get_source_code_node(source_code, concepts=None):
+    if source_code:
+        python_node = PythonNode(source_code, ast.parse(source_code, f"<source>", 'eval'))
+    else:
+        python_node = PythonNode("", None)
+
+    if concepts is None:
+        tokens = list(Tokenizer(source_code, yield_eof=False))
+        return SourceCodeNode(0, len(tokens), tokens, python_node=python_node)
+    else:
+        python_node.concepts = concepts
+        scwcn = SourceCodeWithConceptNode(None, None)
+        scwcn.python_node = python_node
+        return scwcn
+
+
 class TestPythonEvaluator(TestUsingMemoryBasedSheerka):
 
     @pytest.mark.parametrize("ret_val, expected", [
         (ReturnValueConcept("some_name", True, ParserResultConcept(value=PythonNode("", None))), True),
+        (ReturnValueConcept("some_name", True, ParserResultConcept(value=get_source_code_node(""))), True),
+        (ReturnValueConcept("some_name", True, ParserResultConcept(value=get_source_code_node("", {}))), True),
         (ReturnValueConcept("some_name", True, ParserResultConcept(value="other thing")), False),
         (ReturnValueConcept("some_name", False, "not relevant"), False),
         (ReturnValueConcept("some_name", True, Concept()), False)
@@ -39,6 +61,19 @@ class TestPythonEvaluator(TestUsingMemoryBasedSheerka):
         assert evaluated.status
         assert evaluated.value == expected
 
+    @pytest.mark.parametrize("source_code_node, expected", [
+        (get_source_code_node("1 + 1"), 2),
+        (get_source_code_node("one + one", {"one": Concept("one", body="1")}), 2)
+    ])
+    def test_i_can_eval_source_code_node(self, source_code_node, expected):
+        context = self.get_context()
+        return_value = context.sheerka.ret("parsers.??", True, ParserResultConcept(value=source_code_node))
+
+        evaluated = PythonEvaluator().eval(context, return_value)
+
+        assert evaluated.status
+        assert evaluated.value == expected
+
     def test_i_can_eval_using_context(self):
         context = self.get_context()
         parsed = PythonParser().parse(context, ParserInput("test_using_context('value for param1', 10)"))
@@ -239,3 +274,18 @@ class TestPythonEvaluator(TestUsingMemoryBasedSheerka):
         PythonEvaluator().update_globals_with_context(my_globals, context)
 
         assert my_globals == {"self": foo, "b": "'Initialized!'"}
+
+    def test_i_can_use_sheerka_locals(self):
+        sheerka, context = self.init_concepts()
+
+        def func(i):
+            return i + 1
+
+        sheerka.locals["func"] = func
+
+        parsed = PythonParser().parse(context, ParserInput("func(10)"))
+        python_evaluator = PythonEvaluator()
+        evaluated = python_evaluator.eval(context, parsed)
+
+        assert evaluated.status
+        assert evaluated.value == 11

tests/non_reg/test_sheerka_non_reg.py

@@ -348,8 +348,8 @@ as:
             "def concept one as 1",
             "def concept two as 2",
             "def concept number",
-            "one isa number",
-            "two isa number",
+            "set_isa(one, number)",
+            "set_isa(two, number)",
             "def concept twenties from bnf 'twenty' number as 20 + number"
         ]),
         ("When using isa and concept twenty", [
@@ -357,8 +357,8 @@ as:
             "def concept two as 2",
             "def concept twenty as 20",
             "def concept number",
-            "one isa number",
-            "two isa number",
+            "set_isa(one, number)",
+            "set_isa(two, number)",
             "def concept twenties from bnf twenty number as 20 + number"
         ]),
     ])
@@ -408,8 +408,8 @@ as:
         sheerka.evaluate_user_input("def concept one as 1")
         sheerka.evaluate_user_input("def concept two as 2")
         sheerka.evaluate_user_input("def concept number")
-        sheerka.evaluate_user_input("one isa number")
-        sheerka.evaluate_user_input("two isa number")
+        sheerka.evaluate_user_input("set_isa(one, number)")
+        sheerka.evaluate_user_input("set_isa(two, number)")
         sheerka.evaluate_user_input("def concept twenties from bnf 'twenty' number as 20 + number")
 
         res = sheerka.evaluate_user_input("twenty one")
@@ -450,8 +450,8 @@ as:
             "def concept one as 1",
             "def concept twenty as 20",
             "def concept number",
-            "one isa number",
-            "twenty isa number",
+            "set_isa(one, number)",
+            "set_isa(twenty, number)",
             "def concept twenties from bnf twenty number as twenty + number"
         ]
 
@@ -563,7 +563,7 @@ as:
         definitions = [
             "def concept two as 2",
             "def concept number",
-            "two isa number",
+            "set_isa(two, number)",
             "def concept plus_one from bnf number=n1 'plus_one' as n1 + 1",
         ]
 
@@ -574,15 +574,6 @@ as:
         assert res[0].status
         assert res[0].body == 3
 
-    def test_i_can_say_that_a_concept_isa_another_concept(self):
-        sheerka = self.get_sheerka()
-        sheerka.evaluate_user_input("def concept foo")
-        sheerka.evaluate_user_input("def concept bar")
-
-        res = sheerka.evaluate_user_input("foo isa bar")
-        assert len(res) == 1
-        assert res[0].status
-        assert sheerka.isinstance(res[0].body, BuiltinConcepts.SUCCESS)
 
     def test_eval_does_not_break_valid_result(self):
         sheerka = self.get_sheerka()
@@ -662,9 +653,9 @@ as:
             "def concept three as 3",
             "def concept twenty as 20",
             "def concept number",
-            "one isa number",
-            "two isa number",
-            "three isa number",
+            "set_isa(one, number)",
+            "set_isa(two, number)",
+            "set_isa(three, number)",
             "def concept twenties from bnf twenty number where number <= 2 as twenty + number"
         ]
 
@@ -759,7 +750,7 @@ as:
         definitions = [
             "def concept one as 1",
             "def concept number",
-            "one isa number",
+            "set_isa(one, number)",
             "def concept hundreds from bnf number=n1 'hundred' ('and' number=n2)? where n1<10 and n2<100 as n1 * 100 + n2",
         ]
 
@@ -782,7 +773,7 @@ as:
         sheerka.evaluate_user_input("def concept two as 2")
         sheerka.evaluate_user_input("def concept twenties from bnf 'twenty' (one|two)=unit as 20 + unit")
 
-        res = sheerka.evaluate_user_input("twenties isa number")
+        res = sheerka.evaluate_user_input("set_isa(twenties, number)")
         assert len(res) == 1
         assert res[0].status
 
@@ -950,11 +941,11 @@ as:
             "def concept two as 2",
             "def concept twenty as 20",
             "def concept number",
-            "one isa number",
-            "two isa number",
-            "twenty isa number",
+            "set_isa(one, number)",
+            "set_isa(two, number)",
+            "set_isa(twenty, number)",
             "def concept twenties from bnf twenty number where number < 10 as twenty + number",
-            "twenties isa number",
+            "set_isa(twenties, number)",
         ]
 
         sheerka = self.init_scenario(init)
@@ -975,7 +966,7 @@ as:
 
         sheerka = self.init_scenario(init)
 
-        res = sheerka.evaluate_user_input("last_created_concept() isa number")
+        res = sheerka.evaluate_user_input("set_isa(last_created_concept(), number)")
 
         assert res[0].status
         assert sheerka.isa(sheerka.new("one"), sheerka.new("number"))
@@ -1021,7 +1012,7 @@ as:
             "def concept one",
             "def concept foo",
             "def concept number",
-            "one isa number",
+            "set_isa(one, number)",
             "def concept x is a y as isa(x,y) pre in_context(BuiltinConcepts.EVAL_QUESTION_REQUESTED)",
             "def concept x is a y as set_isa(x,y)",
         ]
@@ -1041,7 +1032,7 @@ as:
         init = [
             "def concept one as 1",
             "def concept number",
-            "one isa number",
+            "set_isa(one, number)",
             "def concept one as 10",  # to make sure that it won't be rejected because of the cast
             "def concept x is a y as isa(x,y) pre in_context(BuiltinConcepts.EVAL_QUESTION_REQUESTED)",
             "def concept x is a y as set_isa(x,y)",
@@ -1069,7 +1060,7 @@ as:
             "def concept one",
             "def concept foo",
             "def concept number",
-            "one isa number",
+            "set_isa(one, number)",
             "def concept q from q ? as question(q)",
             "def concept is_a from x is a y as isa(x,y) pre in_context(BuiltinConcepts.EVAL_QUESTION_REQUESTED)",
             "set_is_greater_than(BuiltinConcepts.PRECEDENCE, c:is_a:, c:q:)"
@@ -1125,6 +1116,34 @@ as:
         assert len(res) == 1
         assert res[0].status
 
+    def test_i_can_eval_concepts_fed_with_functions(self):
+        init = [
+            "def concept inc a as a + 1",
+            "def concept one as 1"
+        ]
+
+        def times_five(i):
+            return i * 5
+
+        sheerka = self.init_scenario(init)
+        sheerka.locals["times_five"] = times_five
+
+        res = sheerka.evaluate_user_input("eval inc times_five(one)")
+        assert len(res) == 1
+        assert res[0].status
+        assert res[0].body == 6
+
+    def test_i_can_define_a_concept_when_where_clause_contains_the_name_of_the_variable(self):
+        init = [
+            "def concept x is a y as isa(x,y) pre is_question()",
+        ]
+        sheerka = self.init_scenario(init)
+
+        res = sheerka.evaluate_user_input("def concept a x b where a is a number as a + b")
+        assert len(res) == 1
+        assert res[0].status
+        assert sheerka.isinstance(res[0].body, BuiltinConcepts.NEW_CONCEPT)
+
 
 class TestSheerkaNonRegFile(TestUsingFileBasedSheerka):
     def test_i_can_def_several_concepts(self):
@@ -1197,15 +1216,15 @@ class TestSheerkaNonRegFile(TestUsingFileBasedSheerka):
         self.init_scenario([
             "def concept one as 1",
             "def concept number",
-            "one isa number",
+            "set_isa(one, number)",
             "def concept twenty as 20",
-            "twenty isa number",
+            "set_isa(twenty, number)",
             "def concept twenties from bnf twenty number where number < 10 as twenty + number",
-            "twenties isa number",
+            "set_isa(twenties, number)",
             "def concept thirty as 30",
-            "thirty isa number",
+            "set_isa(thirty, number)",
             "def concept thirties from bnf thirty number where number < 10 as thirty + number",
-            "thirties isa number",
+            "set_isa(thirties, number)",
         ])
 
         sheerka = self.get_sheerka()  # another instance

tests/parsers/parsers_utils.py

@@ -1,4 +1,4 @@
-from core.concept import CC, Concept, ConceptParts, DoNotResolve
+from core.concept import CC, Concept, ConceptParts, DoNotResolve, CIO
 from core.tokenizer import Tokenizer, TokenKind, Token
 from parsers.BaseNodeParser import scnode, utnode, cnode, SCWC, CNC, short_cnode, SourceCodeWithConceptNode, CN, UTN, \
     SCN
@@ -13,7 +13,7 @@ def _index(tokens, expr, index):
     :param index:
     :return:
     """
-    expected = [token.value for token in Tokenizer(expr) if token.type != TokenKind.EOF]
+    expected = [token.str_value for token in Tokenizer(expr) if token.type != TokenKind.EOF]
     for i in range(0, len(tokens) - len(expected) + 1):
         for j in range(len(expected)):
             if tokens[i + j] != expected[j]:
@@ -74,6 +74,14 @@ def get_node(
     if isinstance(sub_expr, (scnode, utnode, DoNotResolve)):
         return sub_expr
 
+    if isinstance(sub_expr, CIO):
+        sub_expr.set_concept(concepts_map[sub_expr.concept_name])
+        if sub_expr.source:
+            node = get_node(concepts_map, expression_as_tokens, sub_expr.source, sya=sya)
+            sub_expr.start = node.start
+            sub_expr.end = node.end
+        return sub_expr
+
     if isinstance(sub_expr, cnode):
         # for cnode, map the concept key to the one from concepts_maps if needed
         if sub_expr.concept_key.startswith("#"):
@@ -192,7 +200,7 @@ def compute_expected_array(concepts_map, expression, expected, sya=False, init_e
     :param exclude_body: do not include ConceptParts.BODY in comparison
     :return:
     """
-    expression_as_tokens = [token.value for token in Tokenizer(expression) if token.type != TokenKind.EOF]
+    expression_as_tokens = [token.str_value for token in Tokenizer(expression) if token.type != TokenKind.EOF]
     return [get_node(
         concepts_map,
         expression_as_tokens,

tests/parsers/test_AtomsParser.py

@@ -34,6 +34,11 @@ class TestAtomsParser(TestUsingMemoryBasedSheerka):
 
     @pytest.mark.parametrize("text, expected", [
         ("foo", ["foo"]),
+        ("c:foo:", [CN("foo", source="c:foo:")]),
+        ("c:|1001:", [CN("foo", source="c:|1001:")]),
+        (" foo", ["foo"]),
+        ("foo ", ["foo"]),
+        (" foo ", ["foo"]),
         ("foo bar", ["foo", "bar"]),
         ("foo bar twenties", ["foo", "bar", "twenties"]),
         ("a plus b", [CN("plus", 0, 4)]),
@@ -347,3 +352,27 @@ class TestAtomsParser(TestUsingMemoryBasedSheerka):
 
         assert res.status
         assert lexer_nodes[0].concept.metadata.is_evaluated == expected_is_evaluated
+
+    def test_the_parser_always_return_a_new_instance_of_the_concept(self):
+        concepts_map = {
+            "foo": Concept("foo"),
+        }
+
+        sheerka, context, parser = self.init_parser(concepts_map, create_new=True, use_sheerka=True)
+        res = parser.parse(context, ParserInput("foo"))
+
+        assert res.status
+        assert id(res.body.body[0].concept) != id(sheerka.get_by_name("foo"))
+
+    def test_i_can_only_parse_when_the_name_is_an_identifier(self):
+        # to prove that I can distinguish string from actual concept name
+        concepts_map = {
+            "foo": Concept("foo"),
+        }
+
+        sheerka, context, parser = self.init_parser(concepts_map, create_new=True, use_sheerka=True)
+        res = parser.parse(context, ParserInput("'foo'"))
+
+        assert not res.status
+        assert sheerka.isinstance(res.body, BuiltinConcepts.NOT_FOR_ME)
+

tests/parsers/test_DefaultParser.py

@@ -6,13 +6,16 @@ from core.builtin_concepts import ParserResultConcept, BuiltinConcepts, ReturnVa
 from core.concept import DEFINITION_TYPE_BNF, DEFINITION_TYPE_DEF, Concept, CV
 from core.sheerka.services.SheerkaExecute import ParserInput
 from core.tokenizer import Keywords, Tokenizer, LexerError
+from parsers.BaseNodeParser import SCN, SCWC
 from parsers.BnfNodeParser import OrderedChoice, ConceptExpression, StrMatch
 from parsers.BnfParser import BnfParser
-from parsers.DefaultParser import DefaultParser, NameNode, SyntaxErrorNode, CannotHandleErrorNode, IsaConceptNode
+from parsers.DefaultParser import DefaultParser, NameNode, SyntaxErrorNode, CannotHandleErrorNode
 from parsers.DefaultParser import UnexpectedTokenErrorNode, DefConceptNode
+from parsers.FunctionParser import FunctionParser
 from parsers.PythonParser import PythonParser, PythonNode
 
 from tests.TestUsingMemoryBasedSheerka import TestUsingMemoryBasedSheerka
+from tests.parsers.parsers_utils import get_node, compute_expected_array
 
 
 def get_def_concept(name, where=None, pre=None, post=None, body=None, definition=None, bnf_def=None, ret=None):
@@ -52,6 +55,18 @@ def get_concept_part(part):
                 parser=PythonParser(),
                 value=node))
 
+    if isinstance(part, FN):
+        # node = PythonNode(part.strip(), ast.parse(part.strip(), mode="eval"))
+        nodes = compute_expected_array({}, part.source, [SCWC(part.first, part.last, *part.content)])
+        return ReturnValueConcept(
+            who="parsers.Default",
+            status=True,
+            value=ParserResultConcept(
+                source=part.source,
+                parser=FunctionParser(),
+                value=nodes[0],
+                try_parsed=nodes[0]))
+
     if isinstance(part, PN):
         node = PythonNode(part.source.strip(), ast.parse(part.source.strip(), mode=part.mode))
         return ReturnValueConcept(
@@ -84,6 +99,17 @@ class PN:
     mode: str  # compilation mode
 
 
+@dataclass
+class FN:
+    """
+    Function Node
+    """
+    source: str
+    first: str
+    last: str
+    content: list
+
+
 class TestDefaultParser(TestUsingMemoryBasedSheerka):
 
     def init_parser(self, *concepts):
@@ -117,7 +143,7 @@ class TestDefaultParser(TestUsingMemoryBasedSheerka):
     def test_i_can_parse_complex_def_concept_statement(self):
         text = """def concept a mult b
 where a,b
-pre isinstance(b, int)
+pre isinstance(a, int) and isinstance(b, int)
 post isinstance(res, a)
 as res = a * b
 ret a if isinstance(a, Concept) else self
@@ -128,8 +154,8 @@ ret a if isinstance(a, Concept) else self
         expected_concept = get_def_concept(
             name="a mult b",
             where="a,b\n",
-            pre="isinstance(b, int)\n",
-            post="isinstance(res, a)\n",
+            pre="isinstance(a, int) and isinstance(b, int)\n",
+            post=FN("isinstance(res, a)\n", "isinstance(", ")", ["res", ", ", "a"]),
             body=PN("res = a * b\n", "exec"),
             ret="a if isinstance(a, Concept) else self\n"
         )
@@ -354,24 +380,21 @@ def concept add one to a as
         assert context.sheerka.isinstance(res.value, BuiltinConcepts.NOT_FOR_ME)
         assert isinstance(res.value.body[0], CannotHandleErrorNode)
 
-    def test_i_can_parse_is_a(self):
-        text = "the name of my 'concept' isa the name of the set"
-        sheerka, context, parser = self.init_parser()
-        res = parser.parse(context, ParserInput(text))
-        expected = IsaConceptNode([],
-                                  concept=NameNode(list(Tokenizer("the name of my 'concept'"))),
-                                  set=NameNode(list(Tokenizer("the name of the set"))))
-
-        assert res.status
-        assert res.who == parser.name
-        assert res.value.source == text
-        assert isinstance(res.value, ParserResultConcept)
-        assert res.value.value == expected
+    # def test_i_can_parse_is_a(self):
+    #     text = "the name of my 'concept' isa the name of the set"
+    #     sheerka, context, parser = self.init_parser()
+    #     res = parser.parse(context, ParserInput(text))
+    #     expected = IsaConceptNode([],
+    #                               concept=NameNode(list(Tokenizer("the name of my 'concept'"))),
+    #                               set=NameNode(list(Tokenizer("the name of the set"))))
+    #
+    #     assert res.status
+    #     assert res.who == parser.name
+    #     assert res.value.source == text
+    #     assert isinstance(res.value, ParserResultConcept)
+    #     assert res.value.value == expected
 
     @pytest.mark.parametrize("text", [
-        "concept",
-        "isa number",
-        "name isa",
         "def",
         "def concept_name"
     ])
@@ -383,6 +406,19 @@ def concept add one to a as
         assert sheerka.isinstance(res.body, BuiltinConcepts.ERROR)
         assert isinstance(res.body.body[0], UnexpectedTokenErrorNode)
 
+    @pytest.mark.parametrize("text", [
+        "concept",
+        "isa number",
+        "name isa",
+    ])
+    def test_i_cannot_parse_not_for_me_entries(self, text):
+        sheerka, context, parser = self.init_parser()
+        res = parser.parse(context, ParserInput(text))
+
+        assert not res.status
+        assert sheerka.isinstance(res.body, BuiltinConcepts.NOT_FOR_ME)
+        assert isinstance(res.body.body[0], CannotHandleErrorNode)
+
     @pytest.mark.parametrize("text, error_msg, error_text", [
         ("'name", "Missing Trailing quote", "'name"),
         ("foo isa 'name", "Missing Trailing quote", "'name"),

tests/parsers/test_FunctionParser.py

@@ -0,0 +1,176 @@
+import pytest
+from core.builtin_concepts import BuiltinConcepts
+from core.concept import Concept
+from core.sheerka.services.SheerkaExecute import ParserInput
+from parsers.BaseNodeParser import SCN, SCWC, CN, UTN, CNC
+from parsers.FunctionParser import FunctionParser, FN
+
+from tests.TestUsingMemoryBasedSheerka import TestUsingMemoryBasedSheerka
+from tests.parsers.parsers_utils import compute_expected_array
+
+cmap = {
+    "one": Concept("one"),
+    "two": Concept("two"),
+    "twenties": Concept("twenties", definition="'twenty' (one|two)=unit").def_var("unit"),
+    "plus": Concept("a plus b").def_var("a").def_var("b"),
+}
+
+
+class TestFunctionParser(TestUsingMemoryBasedSheerka):
+    sheerka = None
+
+    @classmethod
+    def setup_class(cls):
+        t = cls()
+        cls.sheerka, context, _ = t.init_parser(cmap)
+
+    def init_parser(self, concepts_map=None):
+        if concepts_map is not None:
+            sheerka, context, *concepts = self.init_concepts(*concepts_map.values(), create_new=True)
+        else:
+            sheerka = TestFunctionParser.sheerka
+            context = self.get_context(sheerka)
+
+        parser = FunctionParser()
+        return sheerka, context, parser
+
+    def test_i_can_detect_empty_expression(self):
+        sheerka, context, parser = self.init_parser()
+        res = parser.parse(context, ParserInput(""))
+
+        assert not res.status
+        assert sheerka.isinstance(res.body, BuiltinConcepts.IS_EMPTY)
+
+    def test_input_must_be_a_parser_input(self):
+        sheerka, context, parser = self.init_parser()
+        parser.parse(context, "not a parser input") is None
+
+    def test_i_cannot_parse_when_not_a_function(self):
+        sheerka, context, parser = self.init_parser()
+        res = parser.parse(context, ParserInput("not a function"))
+
+        assert not res.status
+        assert sheerka.isinstance(res.body, BuiltinConcepts.NOT_FOR_ME)
+
+    @pytest.mark.parametrize("expression, expected", [
+        ("func()", FN("func(", ")", [])),
+        ("concept(one)", FN("concept(", ")", ["one"])),
+        ("func(one)", FN("func(", ")", ["one"])),
+        ("func(a long two, 'three', ;:$*)", FN("func(", ")", ["a long two, ", "'three', ", ";:$*"])),
+        ("func(func1(one), two, func2(func3(), func4(three)))", FN("func(", ")", [
+            (FN("func1(", ")", ["one"]), ", "),
+            "two, ",
+            (FN("func2(", ")", [
+                (FN("func3(", ")", []), ", "),
+                (FN("func4(", ")", ["three"]), None),
+            ]), None)
+        ])),
+    ])
+    def test_i_can_parse_function(self, expression, expected):
+        sheerka, context, parser = self.init_parser()
+
+        parser.reset_parser(context, ParserInput(expression))
+        res = parser.parse_function()
+
+        assert res == expected
+
+    @pytest.mark.parametrize("text, expected", [
+        ("func()", SCN("func()")),
+        (" func()", SCN("func()")),
+        ("func(one)", SCWC("func(", ")", CN("one"))),
+        ("func(one, unknown, two)", SCWC("func(", ")", CN("one"), ", ", UTN("unknown"), (", ", 1), CN("two"))),
+        ("func(one, twenty two)", SCWC("func(", ")", "one", ", ", CN("twenties", source="twenty two"))),
+        ("func(one plus two, three)", SCWC("func(", ")", CNC("plus", a="one", b="two"), ", ", UTN("three"))),
+        ("func(func1(one), two)", SCWC("func(", (")", 1), SCWC("func1(", ")", "one"), ", ", "two"))
+    ])
+    def test_i_can_parse(self, text, expected):
+        sheerka, context, parser = self.init_parser()
+        resolved_expected = compute_expected_array(cmap, text, [expected])[0]
+
+        res = parser.parse(context, ParserInput(text))
+        parser_result = res.body
+        expression = res.body.body
+
+        assert res.status
+        assert sheerka.isinstance(parser_result, BuiltinConcepts.PARSER_RESULT)
+        assert expression == resolved_expected
+        assert expression.python_node is not None
+        assert expression.return_value is not None
+
+    def test_i_can_parse_when_multiple_results_when_requested(self):
+        sheerka, context, parser = self.init_parser()
+        parser.longest_concepts_only = False
+        text = "func(one, twenty two)"
+        expected = [SCWC("func(", ")", "one", ", ", "twenty ", "two"),
+                    SCWC("func(", ")", "one", ", ", CN("twenties", source="twenty two"))]
+        all_resolved_expected = compute_expected_array(cmap, text, expected)
+
+        results = parser.parse(context, ParserInput(text))
+
+        assert len(results) == 2
+
+        for res, resolved_expected in zip(results, all_resolved_expected):
+            parser_result = res.body
+            expressions = res.body.body
+
+            assert sheerka.isinstance(parser_result, BuiltinConcepts.PARSER_RESULT)
+            assert expressions == resolved_expected
+
+    @pytest.mark.parametrize("text, expected_error_type", [
+        ("one", BuiltinConcepts.NOT_FOR_ME),
+        ("$*!", BuiltinConcepts.NOT_FOR_ME),
+        ("func(", BuiltinConcepts.ERROR),
+        ("func(one", BuiltinConcepts.ERROR),
+        ("func(one, two, ", BuiltinConcepts.ERROR),
+        ("func(one) and func(two)", BuiltinConcepts.ERROR),
+        ("one func(one)", BuiltinConcepts.NOT_FOR_ME),
+    ])
+    def test_i_cannot_parse(self, text, expected_error_type):
+        sheerka, context, parser = self.init_parser()
+
+        res = parser.parse(context, ParserInput(text))
+
+        assert not res.status
+        assert sheerka.isinstance(res.body, expected_error_type)
+
+    @pytest.mark.parametrize("text, expected", [
+        ("func(one two)", SCWC("func(", ")", "one", "two")),
+    ])
+    def test_i_can_detect_non_function(self, text, expected):
+        sheerka, context, parser = self.init_parser()
+        resolved_expected = compute_expected_array(cmap, text, [expected])[0]
+
+        res = parser.parse(context, ParserInput(text))
+        parser_result = res.body
+        expression = res.body.body
+
+        assert not res.status
+        assert sheerka.isinstance(parser_result, BuiltinConcepts.PARSER_RESULT)
+        assert expression == resolved_expected
+        assert expression.python_node is None
+        assert expression.return_value is None
+
+    @pytest.mark.parametrize("sequence, expected", [
+        (None, None),
+        ([["a"]], [["a"]]),
+        ([["a"], ["b", "c"]], [["a"]]),
+        ([["b", "c"], ["a"]], [["a"]]),
+        ([["b", "c"], ["a"], ["d", "e"], ["f"]], [["a"], ["f"]]),
+    ])
+    def test_i_can_get_the_longest_concept_sequence(self, sequence, expected):
+        assert FunctionParser.get_longest_concepts(sequence) == expected
+
+    def test_concepts_found_are_fully_initialized(self):
+        sheerka, context, parser = self.init_parser()
+
+        res = parser.parse(context, ParserInput("func(one plus three)"))
+        concept = res.body.body.nodes[0].concept
+
+        assert res.status
+        assert isinstance(concept.compiled["a"], Concept)
+
+        # three is not recognized,
+        # so it will be transformed into list of ReturnValueConcept that indicate how to recognized it
+        assert isinstance(concept.compiled["b"], list)
+        for item in concept.compiled["b"]:
+            assert sheerka.isinstance(item, BuiltinConcepts.RETURN_VALUE)

tests/parsers/test_PythonWithConceptsParser.py

@@ -104,6 +104,25 @@ class TestPythonWithConceptsParser(TestUsingMemoryBasedSheerka):
         assert result.status
         assert return_value.concepts["__C__foo0et000000__1001__C__"] == foo
 
+    def test_i_can_parse_when_multiple_concepts(self):
+        sheerka, context, foo, bar = self.init_concepts("foo", "bar")
+        input_return_value = ret_val("func(", foo, ", ", bar, ")")
+
+        parser = PythonWithConceptsParser()
+        result = parser.parse(context, input_return_value.body)
+        parser_result = result.value
+        return_value = result.value.value
+
+        assert result.status
+        assert result.who == parser.name
+        assert context.sheerka.isinstance(parser_result, BuiltinConcepts.PARSER_RESULT)
+        assert parser_result.source == "func(foo, bar)"
+        assert isinstance(return_value, PythonNode)
+        assert return_value.source == "func(foo, bar)"
+        assert return_value.get_dump(return_value.ast_) == to_str_ast("func(__C__foo__1001__C__, __C__bar__1002__C__)")
+        assert return_value.concepts["__C__foo__1001__C__"] == foo
+        assert return_value.concepts["__C__bar__1002__C__"] == bar
+
     def test_python_ids_mappings_are_correct_when_concepts_with_the_same_name(self):
         context = self.get_context()
         foo1 = Concept("foo")

tests/parsers/test_SyaNodeParser.py

@@ -1,14 +1,14 @@
 import pytest
 from core.builtin_concepts import BuiltinConcepts
-from core.concept import Concept, CC
+from core.concept import Concept, CIO
 from core.sheerka.services.SheerkaComparisonManager import SheerkaComparisonManager
 from core.sheerka.services.SheerkaExecute import ParserInput
 from core.tokenizer import Tokenizer
 from parsers.BaseNodeParser import utnode, ConceptNode, cnode, short_cnode, UnrecognizedTokensNode, \
-    SCWC, CNC, UTN, SourceCodeWithConceptNode
+    SCWC, CNC, UTN, SCN, CN
 from parsers.PythonParser import PythonNode
 from parsers.SyaNodeParser import SyaNodeParser, SyaConceptParserHelper, SyaAssociativity, \
-    NoneAssociativeSequenceErrorNode, TooManyParametersFound
+    NoneAssociativeSequenceErrorNode, TooManyParametersFound, InFixToPostFix, ParenthesisMismatchErrorNode
 
 import tests.parsers.parsers_utils
 from tests.TestUsingMemoryBasedSheerka import TestUsingMemoryBasedSheerka
@@ -633,21 +633,25 @@ class TestSyaNodeParser(TestUsingMemoryBasedSheerka):
             assert res_i.out == expected_array
 
     @pytest.mark.parametrize("expression, expected", [
-        # I can't manage source code functions :-(
-        # ("function(one plus three) minus two", []),
+        # ("function(one plus three) minus two",
+        #  [SCWC("function(", ")", CNC("plus", a="one", b="three")), "two", "minus"]),
+        ("two minus function(one plus three)",
+         ["two", SCWC("function(", ")", CNC("plus", a="one", b="three")), "minus"]),
+        ("func1() minus func2()", [SCN("func1()"), SCN("func2()"), "minus"]),
+        ("func1() comes with func2()", [SCN("func1()"), UTN(" comes with "), SCN("func2()")]),
 
-        # ("(one plus two) ", ["one", "two", "plus"]),
-        # ("(one prefixed) ", ["one", "prefixed"]),
-        # ("(suffixed one) ", ["one", "suffixed"]),
-        # ("(one ? two : three)", ["one", "two", "three", "?"]),
-        # ("square(square(one))", ["one", ("square", 1), "square"]),
-        # ("square ( square ( one ) )", ["one", ("square", 1), "square"]),
-        #
-        # ("square(one plus three) minus two", ["one", "three", "plus", "square", "two", "minus"]),
-        # ("square( one plus three ) minus two", ["one", "three", "plus", "square", "two", "minus"]),
-        # ("one minus square( two plus three ) ", ["one", "two", "three", "plus", "square", "minus"]),
-        #
-        # ("((one prefixed) prefixed)", ["one", "prefixed", ("prefixed", 1)]),
+        ("(one plus two) ", ["one", "two", "plus"]),
+        ("(one prefixed) ", ["one", "prefixed"]),
+        ("(suffixed one) ", ["one", "suffixed"]),
+        ("(one ? two : three)", ["one", "two", "three", "?"]),
+        ("square(square(one))", ["one", ("square", 1), "square"]),
+        ("square ( square ( one ) )", ["one", ("square", 1), "square"]),
+
+        ("square(one plus three) minus two", ["one", "three", "plus", "square", "two", "minus"]),
+        ("square( one plus three ) minus two", ["one", "three", "plus", "square", "two", "minus"]),
+        ("one minus square( two plus three ) ", ["one", "two", "three", "plus", "square", "minus"]),
+
+        ("((one prefixed) prefixed)", ["one", "prefixed", ("prefixed", 1)]),
         ("( ( one prefixed ) prefixed)", ["one", "prefixed", ("prefixed", 1)]),
         ("( ( square( one ) prefixed ) prefixed)", ["one", "square", "prefixed", ("prefixed", 1)]),
 
@@ -666,6 +670,7 @@ class TestSyaNodeParser(TestUsingMemoryBasedSheerka):
     ])
     def test_i_can_pos_fix_when_parenthesis(self, expression, expected):
         sheerka, context, parser = self.init_parser()
+        context.add_to_protected_hints(BuiltinConcepts.DEBUG)
 
         res = parser.infix_to_postfix(context, ParserInput(expression))
         expected_array = compute_expected_array(cmap, expression, expected)
@@ -675,34 +680,30 @@ class TestSyaNodeParser(TestUsingMemoryBasedSheerka):
 
     @pytest.mark.parametrize("expression, expected_sequences", [
         # composition
-        ("function(suffixed one)", [[SCWC("function(", ")", "one", "suffixed")]]),
-        ("function(one prefixed)", [[SCWC("function(", ")", "one", "prefixed")]]),
-        ("function(if one then two else three end)", [[SCWC("function(", ")", "one", "two", "three", "if")]]),
-        ("function(suffixed twenty two)", [
-            [SCWC("function(", ")", "twenty ", "suffixed", "two")],
-            [SCWC("function(", ")", short_cnode("twenties", "twenty two"), "suffixed")]]),
-        ("function(twenty two prefixed)", [
-            [SCWC("function(", ")", "twenty ", "two", "prefixed")],
-            [SCWC("function(", ")", short_cnode("twenties", "twenty two"), "prefixed")],
-        ]),
-        ("function(if one then twenty two else three end)", [
-            ["')'", "one", "twenty ", "two"],  # error
-            [SCWC("function(", ")", "one", short_cnode("twenties", "twenty two"), "three", "if")]
-        ]),
-        ("func1(func2(one two) three)", [
-            [SCWC("func1(", (")", 1), SCWC("func2(", ")", "one", "two"), "three")]]),
+        ("function(suffixed one)", [[SCWC("function(", ")", CNC("suffixed", a="one"))]]),
+        ("function(one prefixed)", [[SCWC("function(", ")", CNC("prefixed", a="one"))]]),
+        ("function(if one then two else three end)",
+         [[SCWC("function(", ")", CNC("if", a="one", b="two", c="three", end=14))]]),
+        ("function(suffixed twenty two)",
+         [[SCWC("function(", ")", CNC("suffixed", a=CIO("twenties", source="twenty two")))]]),
+        ("function(twenty two prefixed)",
+         [[SCWC("function(", ")", CNC("prefixed", a=CIO("twenties", source="twenty two")))]]),
+        ("function(if one then twenty two else three end)",
+         [[SCWC("function(", ")", CNC("if", a="one", b=CIO("twenties", source="twenty two"), c="three", end=16))]]),
+        ("func1(func2(one two) three)",
+         [[SCWC("func1(", (")", 1), SCWC("func2(", ")", "one", "two"), "three")]]),
 
         ("twenty two(suffixed one)", [
-            ["twenty ", SCWC("two(", ")", "one", "suffixed")],
-            [SCWC("twenty two(", ")", "one", "suffixed")],
+            ["twenty ", SCWC("two(", ")", CNC("suffixed", a="one"))],
+            [CN("twenties", source="twenty two"), "one", "suffixed"],
         ]),
         ("twenty two(one prefixed)", [
-            ["twenty ", SCWC("two(", ")", "one", "prefixed")],
-            [SCWC("twenty two(", ")", "one", "prefixed")],
+            ["twenty ", SCWC("two(", ")", CNC("prefixed", a="one"))],
+            [CN("twenties", source="twenty two"), "one", "prefixed"],
         ]),
         ("f1(one plus two mult three) plus f2(suffixed x$!# prefixed)", [
-            [SCWC("f1(", ")", "one", "two", "three", "mult", "plus"),
-             SCWC("f2(", (")", 1), "x$!#", "prefixed", "suffixed"),
+            [SCWC("f1(", ")", CN("plus", source="one plus two mult three")),
+             SCWC("f2(", (")", 1), CN("suffixed", source="suffixed x$!# prefixed")),
              ("plus", 1)]
         ]),
 
@@ -715,12 +716,10 @@ class TestSyaNodeParser(TestUsingMemoryBasedSheerka):
 
         # Sequence
         ("if one then two else three end function(x$!#)", [
-            ["one", "two", "three", "if", SCWC(" function(", ")", "x$!#")]]),
-        ("one prefixed function(two)", [["one", "prefixed", SCWC(" function(", ")", "two")]]),
-        ("suffixed one function(two)", [["one", "suffixed", SCWC(" function(", ")", "two")]]),
-        (
-            "func1(suffixed one func2(two))",
-            [[SCWC("func1(", (")", 1), "one", "suffixed", SCWC(" func2(", ")", "two"))]]),
+            ["one", "two", "three", "if", UTN(" ", start=13, end=13), SCWC("function(", ")", "x$!#")]]),
+        ("one prefixed function(two)", [["one", "prefixed", UTN(" ", start=3, end=3), SCWC("function(", ")", "two")]]),
+        ("suffixed one function(two)", [["one", "suffixed", UTN(" ", start=3, end=3), SCWC("function(", ")", "two")]]),
+        ("func(one, two, three)", [[SCWC("func(", ")", "one", ", ", "two", (", ", 1), "three")]]),
     ])
     def test_i_can_post_fix_when_parenthesis_and_unknown(self, expression, expected_sequences):
         sheerka, context, parser = self.init_parser()
@@ -737,6 +736,7 @@ class TestSyaNodeParser(TestUsingMemoryBasedSheerka):
         ("one plus ( 1 + ", ("(", 4)),
         ("one( 1 + ", ("(", 1)),
         ("one ( 1 + ", ("(", 2)),
+        ("function(", ("(", 1)),
         ("function( 1 + ", ("(", 1)),
         ("function ( 1 + ", ("(", 2)),
         ("one plus ) 1 + ", (")", 4)),
@@ -754,7 +754,16 @@ class TestSyaNodeParser(TestUsingMemoryBasedSheerka):
         res = parser.infix_to_postfix(context, ParserInput(expression))
 
         assert len(res) == 1
-        assert res[0].errors == [expected]
+        assert res[0].errors == [ParenthesisMismatchErrorNode(expected)]
+
+    def test_i_can_detect_parenthesis_mismatch_error_special_case(self):
+        sheerka, context, parser = self.init_parser()
+        expression = "one ? function( : two"
+        expected = [ParenthesisMismatchErrorNode(("(", 5)), ParenthesisMismatchErrorNode(("(", 5))]
+        res = parser.infix_to_postfix(context, ParserInput(expression))
+
+        assert len(res) == 1
+        assert res[0].errors == expected
 
     @pytest.mark.parametrize("expression, expected", [
         ("one ? one two : three", ("?", ":")),
@@ -802,29 +811,6 @@ class TestSyaNodeParser(TestUsingMemoryBasedSheerka):
         assert len(res) == 1
         assert res[0].out == expected_array
 
-    def test_i_cannot_post_fix_using_concept_short_name(self):
-        concepts_map = {
-            "infixed": self.from_def_concept("infixed", "a infixed b", ["a", "b"]),
-            "suffixed": self.from_def_concept("suffixed", "suffixed a", ["a"]),
-            "prefixed": self.from_def_concept("prefixed", "a prefixed", ["a"]),
-        }
-        sheerka, context, parser = self.init_parser(concepts_map)
-
-        res = parser.infix_to_postfix(context, ParserInput("desc(infixed)"))
-        assert len(res) == 1
-        assert isinstance(res[0].out[0], SourceCodeWithConceptNode)
-        assert res[0].out[0].nodes[0].error == 'Not enough prefix parameters'
-
-        res = parser.infix_to_postfix(context, ParserInput("desc(suffixed)"))
-        assert len(res) == 1
-        assert isinstance(res[0].out[0], SourceCodeWithConceptNode)
-        assert res[0].out[0].nodes[0].error == 'Not enough suffix parameters'
-
-        res = parser.infix_to_postfix(context, ParserInput("desc(prefixed)"))
-        assert len(res) == 1
-        assert isinstance(res[0].out[0], SourceCodeWithConceptNode)
-        assert res[0].out[0].nodes[0].error == 'Not enough prefix parameters'
-
     @pytest.mark.parametrize("expression", [
         "one ? two : three",
         "one?two:three",
@@ -861,7 +847,7 @@ class TestSyaNodeParser(TestUsingMemoryBasedSheerka):
         expression = "a plus plus equals b"
         res = parser.infix_to_postfix(context, ParserInput(expression))
         expected_array = tests.parsers.parsers_utils.compute_debug_array(res)
-        assert expected_array == [
+        assert len(expected_array) == len([
             ["T(a)", "C(a plus b)", "C(a plus b)", "T(equals)", "T(b)"],
             ["T(a)", "C(a plus b)", "C(a plus plus)", "T(equals)", "T(b)"],
             ["T(a)", "C(a plus b)", "C(a plus equals b)", "T(equals)", "T(b)"],
@@ -871,27 +857,7 @@ class TestSyaNodeParser(TestUsingMemoryBasedSheerka):
             ["T(a)", "C(a plus equals b)", "C(a plus b)", "T(equals)", "T(b)"],
             ["T(a)", "C(a plus equals b)", "C(a plus plus)", "T(equals)", "T(b)"],
             ["T(a)", "C(a plus equals b)", "C(a plus equals b)", "T(equals)", "T(b)"],
-        ]
-
-    def test_non_reg(self):
-        concepts_map = {
-            "plus": Concept("a plus b").def_var("a").def_var("b"),
-            "complex infix": Concept("a complex infix b ").def_var("a").def_var("b"),
-        }
-
-        sya_def = {
-            # concepts_map["plus"]: (1, SyaAssociativity.Right),
-            # concepts_map["plus plus"]: (1, SyaAssociativity.Right),
-            # concepts_map["plus equals"]: (1, SyaAssociativity.Right),
-        }
-
-        sheerka, context, parser = self.init_parser(concepts_map, sya_def)
-
-        expression = "a plus complex infix b"
-        res = parser.infix_to_postfix(context, ParserInput(expression))
-
-        res = parser.parse(context, ParserInput(expression))
-        pass
+        ])
 
     def test_i_can_use_string_instead_of_identifier(self):
         concepts_map = {
@@ -945,6 +911,81 @@ class TestSyaNodeParser(TestUsingMemoryBasedSheerka):
         assert len(res) == 1
         assert res[0].out == expected_array
 
+    @pytest.mark.parametrize("expression, expected_debugs", [
+        ("one", [["  0:one => PUSH_UNREC"]]),
+        ("one plus two", [[
+            '  0:one => PUSH_UNREC',
+            '  1:<ws> => PUSH_UNREC',
+            '  2:plus(SyaConceptDef(concept=(1005)a plus b, precedence=1, associativity=right)) => ??',
+            "  _: => RECOG [[CN((1001)one)]]",
+            "  _: => POP ConceptNode(concept='(1001)one', source='one', start=0, end=0)",
+            '  2:plus(SyaConceptDef(concept=(1005)a plus b, precedence=1, associativity=right)) => PUSH',
+            '  3:<ws> => EAT',
+            '  4:two => PUSH_UNREC',
+            '  5:<EOF> => ??',
+            "  _: => RECOG [[CN((1002)two)]]",
+            "  _: => POP ConceptNode(concept='(1002)two', source='two', start=4, end=4)",
+            '  _: => POP SyaConceptParserHelper(concept=(1005)a plus b, start=2, error=None)']]),
+        ("suffixed one", [[
+            '  0:suffixed(SyaConceptDef(concept=(1009)suffixed a, precedence=1, associativity=right)) => PUSH',
+            '  1:<ws> => EAT',
+            '  2:one => PUSH_UNREC',
+            '  3:<EOF> => ??',
+            "  _: => RECOG [[CN((1001)one)]]",
+            "  _: => POP ConceptNode(concept='(1001)one', source='one', start=2, end=2)",
+            '  _: => POP SyaConceptParserHelper(concept=(1009)suffixed a, start=0, error=None)'
+        ]]),
+        ("one ? twenty one : three", [[
+            '  0:one => PUSH_UNREC',
+            '  1:<ws> => PUSH_UNREC',
+            '  2:?(SyaConceptDef(concept=(1011)a ? b : c, precedence=1, associativity=right)) => ??',
+            "  _: => RECOG [[CN((1001)one)]]",
+            "  _: => POP ConceptNode(concept='(1001)one', source='one', start=0, end=0)",
+            '  2:?(SyaConceptDef(concept=(1011)a ? b : c, precedence=1, associativity=right)) => PUSH',
+            '  3:<ws> => EAT',
+            '  4:twenty => PUSH_UNREC',
+            '  5:<ws> => PUSH_UNREC',
+            '  6:one => PUSH_UNREC',
+            '  7:<ws> => PUSH_UNREC',
+            '  8:: => ??',
+            "  _: => RECOG [[UTN('twenty '), CN((1001)one)], [CN((1016)twenties)]]",
+            "  _: => POP UnrecognizedTokensNode(source='twenty ', start=4, end=5)",
+            "  _: => POP ConceptNode(concept='(1001)one', source='one', start=6, end=6)",
+            "  _: => => ERROR Too many parameters found for '(1011)a ? b : c' before token 'Token(:)'",
+            '  8:: => EAT',
+        ], [
+            '  0:one => PUSH_UNREC',
+            '  1:<ws> => PUSH_UNREC',
+            '  2:?(SyaConceptDef(concept=(1011)a ? b : c, precedence=1, associativity=right)) => ??',
+            '  _: => RECOG [[CN((1001)one)]]',
+            "  _: => POP ConceptNode(concept='(1001)one', source='one', start=0, end=0)",
+            '  2:?(SyaConceptDef(concept=(1011)a ? b : c, precedence=1, associativity=right)) => PUSH',
+            '  3:<ws> => EAT',
+            '  4:twenty => PUSH_UNREC',
+            '  5:<ws> => PUSH_UNREC',
+            '  6:one => PUSH_UNREC',
+            '  7:<ws> => PUSH_UNREC',
+            '  8:: => ??',
+            "  _: => RECOG [[UTN('twenty '), CN((1001)one)], [CN((1016)twenties)]]",
+            "  _: => POP ConceptNode(concept='(1016)twenties', source='twenty one', start=4, end=6, ConceptParts.BODY='DoNotResolve(value='twenty one')', unit='(1001)one')",
+            '  9:<ws> => EAT',
+            ' 10:three => PUSH_UNREC',
+            ' 11:<EOF> => ??',
+            '  _: => RECOG [[CN((1003)three)]]',
+            "  _: => POP ConceptNode(concept='(1003)three', source='three', start=10, end=10)",
+            '  _: => POP SyaConceptParserHelper(concept=(1011)a ? b : c, start=2, error=None)'
+        ]]),
+    ])
+    def test_i_can_debug(self, expression, expected_debugs):
+        sheerka, context, parser = self.init_parser()
+        context.add_to_private_hints(BuiltinConcepts.DEBUG)
+        res = parser.infix_to_postfix(context, ParserInput(expression))
+
+        assert len(res) == len(expected_debugs)
+        for res_i, expected_debug in zip(res, expected_debugs):
+            actual_debug = [str(di) for di in res_i.debug]
+            assert actual_debug == expected_debug
+
     def test_i_can_parse_when_concept_atom_only(self):
         sheerka, context, parser = self.init_parser()
 
@@ -1032,17 +1073,11 @@ class TestSyaNodeParser(TestUsingMemoryBasedSheerka):
         assert concept_suffixed_a == cmap["two"]
 
     @pytest.mark.parametrize("text, expected_status, expected_result", [
-        ("function(suffixed one)", True, [
-            SCWC("function(", ")", CNC("suffixed", 2, 4, a="one"))]),
-        ("function(one plus two mult three)", True, [
-            SCWC("function(", ")", CNC("plus", 2, 10, a="one", b=CC("mult", a="two", b="three")))]),
-        ("f1(one prefixed) plus f2(suffixed two)", True, [
+        ("f1(one prefixed) plus f2(suffixed two)", False, [
             CNC("plus",
                 a=SCWC("f1(", ")", CNC("prefixed", a="one")),
                 b=SCWC("f2(", (")", 1), CNC("suffixed", a="two")))
         ]),
-        ("function(suffixed x$!#)", False, [
-            SCWC("function(", ")", CNC("suffixed", 2, 7, a="x$!#"))]),
         ("one is a concept", True, [CNC("is a concept", c="one")]),
         ("a is a concept", False, [CNC("is a concept", c=UTN("a"))]),
     ])
@@ -1058,6 +1093,19 @@ class TestSyaNodeParser(TestUsingMemoryBasedSheerka):
         assert context.sheerka.isinstance(wrapper, BuiltinConcepts.PARSER_RESULT)
         assert lexer_nodes == expected_array
 
+    @pytest.mark.parametrize("text", [
+        "function(suffixed one)",
+        "function(one plus two mult three)",
+        "function(suffixed x$!#)"
+    ])
+    def test_i_cannot_parse_when_function_only(self, text):
+        sheerka, context, parser = self.init_parser()
+
+        res = parser.parse(context, ParserInput(text))
+
+        assert not res.status
+        assert sheerka.isinstance(res.body, BuiltinConcepts.NOT_FOR_ME)
+
     @pytest.mark.parametrize("text", [
         "foo bar (one",
         "foo bar one",
@@ -1082,14 +1130,13 @@ class TestSyaNodeParser(TestUsingMemoryBasedSheerka):
         ("one plus two foo bar baz", [CNC("plus", a="one", b="two"), UTN(" foo bar baz")]),
         ("one plus two foo bar", [CNC("plus", a="one", b="two"), UTN(" foo bar")]),
         ("foo bar one plus two", [UTN("foo bar "), CNC("plus", a="one", b="two")]),
-        ("foo bar (one plus two", [UTN("foo bar ("), CNC("plus", a="one", b="two")]),
         ("one plus two a long other b", [CNC("plus", a="one", b="two"), UTN(" a long other b")]),
         ("one plus two a long infixed", [CNC("plus", a="one", b="two"), UTN(" a long infixed")]),
         ("one plus two a long", [CNC("plus", a="one", b="two"), UTN(" a long")]),
         ("one ? a long infixed : two", [CNC("?", a="one", b=UTN("a long infixed"), c="two")]),
         ("one ? a long infix : two", [CNC("?", a="one", b=UTN("a long infix"), c="two")]),
     ])
-    def test_i_cannot_parse_when_one_part_is_recognized_but_not_the_rest(self, text, expected_result):
+    def test_i_can_almost_parse_when_one_part_is_recognized_but_not_the_rest(self, text, expected_result):
         """
         We test that the parsed concept seems like a known one, but it was not.
         The parser has to detected that the predication was incorrect
@@ -1194,3 +1241,57 @@ class TestSyaNodeParser(TestUsingMemoryBasedSheerka):
 
         assert not res.status
         assert sheerka.isinstance(res.body, BuiltinConcepts.IS_EMPTY)
+
+    @pytest.mark.parametrize("expression, expected", [
+        ("function(", ([], "function(")),
+        ("before the function(", (["before the "], "function(")),
+        ("one two function(", (["one", "two", UTN(" ", 3, 3)], "function(")),
+        ("one(", ([], "one(")),
+        ("one before the function(", (["one", " before the "], "function(")),
+    ])
+    def test_i_can_get_functions_names_from_unrecognized(self, expression, expected):
+        sheerka, context, parser = self.init_parser()
+        infix_to_postfix = InFixToPostFix(context)
+
+        tokens = list(Tokenizer(expression, yield_eof=False))
+        for pos, token in enumerate(tokens[:-1]):
+            infix_to_postfix.eat_unrecognized(token, pos)
+
+        resolved_to_out = compute_expected_array(cmap, expression, expected[0])
+        resolved_function_name = compute_expected_array(cmap, expression, [expected[1]])
+        actual = infix_to_postfix.get_functions_names_from_unrecognized(tokens[-1], len(tokens) - 1)
+
+        assert len(actual) == 1
+
+        assert actual[0].to_out == resolved_to_out
+        actual[0].function.fix_source()
+        assert actual[0].function == resolved_function_name[0]
+
+    @pytest.mark.parametrize("expression, expected_list", [
+        ("twenty two function(", [(["twenty ", "two", UTN(" ", 3, 3)], "function("),
+                                  ([CN("twenties", source="twenty two"), UTN(" ", 3, 3)], "function(")]),
+        ("twenty two(", [(["twenty "], "two("),
+                         ([CN("twenties", source="twenty two")], None)]),
+    ])
+    def test_i_can_get_functions_names_from_unrecognized_when_multiple_results(self, expression, expected_list):
+        sheerka, context, parser = self.init_parser()
+        infix_to_postfix = InFixToPostFix(context)
+
+        tokens = list(Tokenizer(expression, yield_eof=False))
+        for pos, token in enumerate(tokens[:-1]):
+            infix_to_postfix.eat_unrecognized(token, pos)
+
+        actual_list = infix_to_postfix.get_functions_names_from_unrecognized(tokens[-1], len(tokens) - 1)
+
+        assert len(actual_list) == len(expected_list)
+
+        for actual, expected in zip(actual_list, expected_list):
+            resolved_to_out = compute_expected_array(cmap, expression, expected[0])
+
+            assert actual.to_out == resolved_to_out
+            if actual.function:
+                actual.function.fix_source()
+                resolved_function_name = compute_expected_array(cmap, expression, [expected[1]])
+                assert actual.function == resolved_function_name[0]
+            else:
+                assert actual.function is None

tests/parsers/test_UnrecognizedNodeParser.py

@@ -31,9 +31,9 @@ def get_input_nodes_from(my_concepts_map, full_expr, *args):
 
         if isinstance(n, SCWC):
             n.first = _get_real_node(n.first)
-            n.last = _get_real_node(n.first)
+            n.last = _get_real_node(n.last)
             n.content = tuple(_get_real_node(nn) for nn in n.content)
-            return SourceCodeWithConceptNode(n.first, n.last, list(n.content))
+            return SourceCodeWithConceptNode(n.first, n.last, list(n.content)).pseudo_fix_source()
 
         if isinstance(n, (UnrecognizedTokensNode, ConceptNode, SourceCodeNode, SourceCodeWithConceptNode)):
             return n
@@ -254,6 +254,7 @@ class TestUnrecognizedNodeParser(TestUsingMemoryBasedSheerka):
 
         assert res.status
         assert sheerka.isinstance(parser_result, BuiltinConcepts.PARSER_RESULT)
+        assert parser_result.source == expression
         assert len(actual_nodes) == 1
         assert actual_nodes[0] == scnode(0, 4, expression)
 
@@ -270,6 +271,7 @@ class TestUnrecognizedNodeParser(TestUsingMemoryBasedSheerka):
 
         assert not res.status
         assert sheerka.isinstance(parser_result, BuiltinConcepts.PARSER_RESULT)
+        assert parser_result.source == expression
         assert len(actual_nodes) == 1
         assert actual_nodes[0] == nodes[0]
 
@@ -287,6 +289,7 @@ class TestUnrecognizedNodeParser(TestUsingMemoryBasedSheerka):
 
         assert res.status
         assert sheerka.isinstance(parser_result, BuiltinConcepts.PARSER_RESULT)
+        assert parser_result.source == expression
         assert len(actual_nodes) == 1
         expected_array = compute_expected_array(
             concepts_map,
@@ -306,6 +309,7 @@ class TestUnrecognizedNodeParser(TestUsingMemoryBasedSheerka):
 
         assert res.status
         assert sheerka.isinstance(parser_result, BuiltinConcepts.PARSER_RESULT)
+        assert parser_result.source == expression
         assert len(actual_nodes) == 1
 
         expected_array = compute_expected_array(
@@ -328,8 +332,9 @@ class TestUnrecognizedNodeParser(TestUsingMemoryBasedSheerka):
         parser_result = res.body
         actual_nodes = res.body.body
 
-        assert not res.status # status is False to let PythonWithConceptParser validate the code
+        assert not res.status  # status is False to let PythonWithConceptParser validate the code
         assert sheerka.isinstance(parser_result, BuiltinConcepts.PARSER_RESULT)
+        assert parser_result.source == expression
         assert len(actual_nodes) == 1
         assert actual_nodes[0].nodes[0].concept.metadata.is_evaluated  # 'a plus b' is recognized as concept definition
 
@@ -348,9 +353,37 @@ class TestUnrecognizedNodeParser(TestUsingMemoryBasedSheerka):
 
         assert not res.status  # status is False to let PythonWithConceptParser validate the code
         assert sheerka.isinstance(parser_result, BuiltinConcepts.PARSER_RESULT)
+        assert parser_result.source == expression
         assert len(actual_nodes) == 1
         assert not actual_nodes[0].nodes[0].concept.metadata.is_evaluated  # 'a plus b' need to be evaluated
 
+    def test_i_can_parse_unrecognized_sya_concept_that_references_source_code(self):
+        sheerka, context, parser = self.init_parser()
+
+        expression = "hello get_user_name(twenty one)"
+        tmp_node = CNC("hello_sya",
+                       source="hello get_user_name(twenty one)",
+                       a=SCWC("get_user_name(", ")", CNC("twenties", source="twenty one", unit="one")))
+        nodes = get_input_nodes_from(concepts_map, expression, tmp_node)
+        parser_input = ParserResultConcept("parsers.xxx", source=expression, value=nodes)
+
+        res = parser.parse(context, parser_input)
+        parser_result = res.body
+        actual_nodes = res.body.body
+
+        assert res.status
+        assert sheerka.isinstance(parser_result, BuiltinConcepts.PARSER_RESULT)
+        assert parser_result.source == expression
+        assert len(actual_nodes) == 1
+
+        expected_array = compute_expected_array(
+            concepts_map,
+            expression, [CN("hello_sya", source="hello get_user_name(twenty one)")],
+            exclude_body=True)
+        assert actual_nodes == expected_array
+        assert isinstance(actual_nodes[0].concept.compiled["a"], list)
+        assert sheerka.isinstance(actual_nodes[0].concept.compiled["a"][0], BuiltinConcepts.RETURN_VALUE)
+
     def test_i_can_parse_sequences(self):
         sheerka, context, parser = self.init_parser()