janware/jw-python
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grammar.py: Add grammar_parse_ebnf_tokens()

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Add grammar_parse_ebnf_tokens(), to be used by external grammar parsers
and grammar_parse_ebnf()

Signed-off-by: Jan Lindemann <jan@janware.com>
This commit is contained in:
Jan Lindemann 2017-10-28 19:16:00 +02:00
commit 432d78cdc5
4 changed files with 216 additions and 91 deletions
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3
test/grammar/Makefile
View file

@ -1,5 +1,8 @@
TOPDIR = ../..
USE_PROJECT_LIB = true
MEMBERS += local.a($(OBJ))
GENERATED_STD = grammartest.l grammartest.y grammartest.ebnf include/grammartest.h
# These types are meant to be cut off the tree and turned into hand coded flex

6
test/grammar/generate.py
View file

@ -47,12 +47,6 @@ class GrammarCmd(jwutils.grammar.GrammarCmd):
with open(args.input, 'r') as infile:
contents = infile.read()
grammar = jwutils.grammar.grammar_parse_ebnf(contents)
slog(INFO, "grammar size is", len(grammar))
for t in grammar.keys():
slog(INFO, "key =", t)
slog(INFO, "grammar size is", len(grammar))
jwutils.grammar.dump_grammar(INFO, grammar)
grammar = super(GrammarCmd, self).processGrammar(args, grammar)
self._run(args, grammar)

2
test/grammar/grammartest-input.ebnf
View file

@ -5,7 +5,7 @@
'END.' ;
identifier = alphabetic character, { alphabetic character | digit } ;
number = [ "-" ], digit, { digit } ;
string = '"' , { all characters - '"' }, '"' ;
string = '"' , { all characters }, '"' ;
assignment = identifier , ":=" , ( number | identifier | string ) ;
alphabetic character = "A" | "B" | "C" | "D" | "E" | "F" | "G"
| "H" | "I" | "J" | "K" | "L" | "M" | "N"