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bpo-41215: Don't use NULL by default in the PEG parser keyword list by pablogsal · Pull Request #21355 · python/cpython · GitHub

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bpo-41215: Don't use NULL by default in the PEG parser keyword list #21355

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Merged
miss-islington merged 2 commits into from
Jul 6, 2020
Conversation 10 Commits 2 Checks 0 Files changed
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bpo-41215: Don't use NULL by default in the PEG parser keyword list #21355

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bpo-41215: Don't use NULL by default in the PEG parser keyword list
pablogsal Jul 6, 2020
6689654
Update Misc/NEWS.d/next/Core and Builtins/2020-07-06-18-36-33.bpo-412…
pablogsal Jul 6, 2020
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Core and Builtins/2020-07-06-18-36-33.bpo-41215.vFGFIz.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
Use non-NULL default values in the PEG parser keyword list to overcome a bug that was preventing
Python from being properly compiled when using the XLC compiler. Patch by Pablo Galindo.
4 changes: 2 additions & 2 deletions Parser/parser.c
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Expand Up @@ -9,8 +9,8 @@ extern int Py_DebugFlag;
#endif
static const int n_keyword_lists = 9;
static KeywordToken *reserved_keywords[] = {
NULL,
NULL,
(KeywordToken[]) {{NULL, -1}},
(KeywordToken[]) {{NULL, -1}},
(KeywordToken[]) {
{"if", 510},
{"in", 518},
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7 changes: 5 additions & 2 deletions Parser/pegen.c
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Expand Up @@ -525,10 +525,13 @@ _PyPegen_dummy_name(Parser *p, ...)
static int
_get_keyword_or_name_type(Parser *p, const char *name, int name_len)
{
if (name_len >= p->n_keyword_lists || p->keywords[name_len] == NULL) {
assert(name_len != 0);
if (name_len >= p->n_keyword_lists ||
p->keywords[name_len] == NULL ||
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p->keywords[name_len]->type == -1) {
return NAME;
}
for (KeywordToken *k = p->keywords[name_len]; k->type != -1; k++) {
for (KeywordToken *k = p->keywords[name_len]; k != NULL && k->type != -1; k++) {
if (strncmp(k->str, name, name_len) == 0) {
return k->type;
}
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2 changes: 1 addition & 1 deletion Tools/peg_generator/pegen/c_generator.py
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Expand Up @@ -440,7 +440,7 @@ def _setup_keywords(self) -> None:
num_groups = max(groups) + 1 if groups else 1
for keywords_length in range(num_groups):
if keywords_length not in groups.keys():
self.print("NULL,")
self.print("(KeywordToken[]) {{NULL, -1}},")
else:
self.print("(KeywordToken[]) {")
with self.indent():
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