Added simple form of concept composition

tests/test_BnfParser.py

@@ -6,7 +6,7 @@ from core.tokenizer import Tokenizer, TokenKind, LexerError
 from parsers.BaseParser import UnexpectedTokenErrorNode
 from parsers.BnfParser import BnfParser, UnexpectedEndOfFileError
 from parsers.ConceptLexerParser import StrMatch, Optional, ZeroOrMore, OrderedChoice, Sequence, OneOrMore, \
-    ConceptLexerParser, ConceptNode, ConceptMatch
+    ConceptLexerParser, ConceptNode, ConceptMatch, cnode
 from sdp.sheerkaDataProvider import Event
 
 
@@ -108,12 +108,12 @@ def test_i_can_use_the_result_of_regex_parsing_to_parse_a_text():
 
     res = concept_parser.parse(context, "twenty two")
     assert res.status
-    assert res.value.body == [("bar", 0, 2, "twenty two")]
+    assert res.value.body == [cnode("bar", 0, 2, "twenty two")]
 
     res = concept_parser.parse(context, "thirty one")
     assert res.status
-    assert res.value.body == [("bar", 0, 2, "thirty one")]
+    assert res.value.body == [cnode("bar", 0, 2, "thirty one")]
 
     res = concept_parser.parse(context, "twenty")
     assert res.status
-    assert res.value.body == [("foo", 0, 0, "twenty")]
+    assert res.value.body == [cnode("foo", 0, 0, "twenty")]