diff options
| -rw-r--r-- | Parser/parsetok.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Parser/parsetok.c b/Parser/parsetok.c index 6017e5f..386b82f 100644 --- a/Parser/parsetok.c +++ b/Parser/parsetok.c @@ -92,6 +92,9 @@ PyParser_ParseFileFlags(FILE *fp, char *filename, grammar *g, int start, /* Parse input coming from the given tokenizer structure. Return error code. */ +static char yield_msg[] = +"%s:%d: Warning: 'yield' will become a reserved keyword in the future\n"; + static node * parsetok(struct tok_state *tok, grammar *g, int start, perrdetail *err_ret, int flags) @@ -135,6 +138,15 @@ parsetok(struct tok_state *tok, grammar *g, int start, perrdetail *err_ret, if (len > 0) strncpy(str, a, len); str[len] = '\0'; + + /* Warn about yield as NAME */ + if (type == NAME && !ps->p_generators && + len == 5 && str[0] == 'y' && strcmp(str, "yield") == 0) + PySys_WriteStderr(yield_msg, + err_ret->filename==NULL ? + "<string>" : err_ret->filename, + tok->lineno); + if ((err_ret->error = PyParser_AddToken(ps, (int)type, str, tok->lineno, &(err_ret->expected))) != E_OK) { |