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Fix lookahead of soft keywords in the PEG parser (GH-20436)

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Automerge-Triggered-By: @gvanrossum
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Pablo Galindo 2020-05-27 00:15:52 +01:00 • committed by GitHub
parent 21fda91f8d
commit 404b23b85b
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4 changed files with 31 additions and 2 deletions
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9
Parser/pegen/pegen.c
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@ -718,6 +718,15 @@ _PyPegen_lookahead_with_name(int positive, expr_ty (func)(Parser *), Parser *p)
return (res != NULL) == positive;
}
int
_PyPegen_lookahead_with_string(int positive, expr_ty (func)(Parser *, const char*), Parser *p, const char* arg)
{
int mark = p->mark;
void *res = func(p, arg);
p->mark = mark;
return (res != NULL) == positive;
}
int
_PyPegen_lookahead_with_int(int positive, Token *(func)(Parser *, int), Parser *p, int arg)
{

1
Parser/pegen/pegen.h
View file

@ -119,6 +119,7 @@ int _PyPegen_is_memoized(Parser *p, int type, void *pres);
int _PyPegen_lookahead_with_name(int, expr_ty (func)(Parser *), Parser *);
int _PyPegen_lookahead_with_int(int, Token *(func)(Parser *, int), Parser *, int);
int _PyPegen_lookahead_with_string(int , expr_ty (func)(Parser *, const char*), Parser *, const char*);
int _PyPegen_lookahead(int, void *(func)(Parser *), Parser *);
Token *_PyPegen_expect_token(Parser *p, int type);