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gh-119981: use do { ... } while(0) in some multi-line macros #119982

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Merged
merged 6 commits into from
Jun 3, 2024
Merged

gh-119981: use do { ... } while(0) in some multi-line macros #119982

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6143080
use do { ... } while(0) in some macros
picnixz Jun 3, 2024
5e200d4
fixup
picnixz Jun 3, 2024
e003ac3
fixup
picnixz Jun 3, 2024
12a0c8e
Merge branch 'main' into use-do-while-in-macros
picnixz Jun 3, 2024
86db9ba
address review
picnixz Jun 3, 2024
1129661
fixup
picnixz Jun 3, 2024
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97 changes: 52 additions & 45 deletions Python/symtable.c
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Original file line number Diff line number Diff line change
Expand Up @@ -601,16 +601,17 @@ error_at_directive(PySTEntryObject *ste, PyObject *name)
global: set of all symbol names explicitly declared as global
*/

#define SET_SCOPE(DICT, NAME, I) { \
PyObject *o = PyLong_FromLong(I); \
if (!o) \
return 0; \
if (PyDict_SetItem((DICT), (NAME), o) < 0) { \
#define SET_SCOPE(DICT, NAME, I) \
do { \
PyObject *o = PyLong_FromLong(I); \
if (!o) \
return 0; \
if (PyDict_SetItem((DICT), (NAME), o) < 0) { \
Py_DECREF(o); \
return 0; \
} \
Py_DECREF(o); \
return 0; \
} \
Py_DECREF(o); \
}
} while(0)

/* Decide on scope of name, given flags.

Expand Down Expand Up @@ -1562,39 +1563,45 @@ symtable_enter_type_param_block(struct symtable *st, identifier name,
return --(ST)->recursion_depth,(X)

#define VISIT(ST, TYPE, V) \
if (!symtable_visit_ ## TYPE((ST), (V))) \
VISIT_QUIT((ST), 0);

#define VISIT_SEQ(ST, TYPE, SEQ) { \
int i; \
asdl_ ## TYPE ## _seq *seq = (SEQ); /* avoid variable capture */ \
for (i = 0; i < asdl_seq_LEN(seq); i++) { \
TYPE ## _ty elt = (TYPE ## _ty)asdl_seq_GET(seq, i); \
if (!symtable_visit_ ## TYPE((ST), elt)) \
VISIT_QUIT((ST), 0); \
} \
}

#define VISIT_SEQ_TAIL(ST, TYPE, SEQ, START) { \
int i; \
asdl_ ## TYPE ## _seq *seq = (SEQ); /* avoid variable capture */ \
for (i = (START); i < asdl_seq_LEN(seq); i++) { \
TYPE ## _ty elt = (TYPE ## _ty)asdl_seq_GET(seq, i); \
if (!symtable_visit_ ## TYPE((ST), elt)) \
VISIT_QUIT((ST), 0); \
} \
}

#define VISIT_SEQ_WITH_NULL(ST, TYPE, SEQ) { \
int i = 0; \
asdl_ ## TYPE ## _seq *seq = (SEQ); /* avoid variable capture */ \
for (i = 0; i < asdl_seq_LEN(seq); i++) { \
TYPE ## _ty elt = (TYPE ## _ty)asdl_seq_GET(seq, i); \
if (!elt) continue; /* can be NULL */ \
if (!symtable_visit_ ## TYPE((ST), elt)) \
VISIT_QUIT((ST), 0); \
} \
}
do { \
if (!symtable_visit_ ## TYPE((ST), (V))) { \
VISIT_QUIT((ST), 0); \
} \
} while(0)

#define VISIT_SEQ(ST, TYPE, SEQ) \
do { \
int i; \
asdl_ ## TYPE ## _seq *seq = (SEQ); /* avoid variable capture */ \
for (i = 0; i < asdl_seq_LEN(seq); i++) { \
TYPE ## _ty elt = (TYPE ## _ty)asdl_seq_GET(seq, i); \
if (!symtable_visit_ ## TYPE((ST), elt)) \
VISIT_QUIT((ST), 0); \
} \
} while(0)

#define VISIT_SEQ_TAIL(ST, TYPE, SEQ, START) \
do { \
int i; \
asdl_ ## TYPE ## _seq *seq = (SEQ); /* avoid variable capture */ \
for (i = (START); i < asdl_seq_LEN(seq); i++) { \
TYPE ## _ty elt = (TYPE ## _ty)asdl_seq_GET(seq, i); \
if (!symtable_visit_ ## TYPE((ST), elt)) \
VISIT_QUIT((ST), 0); \
} \
} while(0)

#define VISIT_SEQ_WITH_NULL(ST, TYPE, SEQ) \
do { \
int i = 0; \
asdl_ ## TYPE ## _seq *seq = (SEQ); /* avoid variable capture */ \
for (i = 0; i < asdl_seq_LEN(seq); i++) { \
TYPE ## _ty elt = (TYPE ## _ty)asdl_seq_GET(seq, i); \
if (!elt) continue; /* can be NULL */ \
if (!symtable_visit_ ## TYPE((ST), elt)) \
VISIT_QUIT((ST), 0); \
} \
} while(0)

static int
symtable_record_directive(struct symtable *st, identifier name, int lineno,
Expand Down Expand Up @@ -2261,11 +2268,11 @@ symtable_visit_expr(struct symtable *st, expr_ty e)
break;
case Slice_kind:
if (e->v.Slice.lower)
VISIT(st, expr, e->v.Slice.lower)
VISIT(st, expr, e->v.Slice.lower);
if (e->v.Slice.upper)
VISIT(st, expr, e->v.Slice.upper)
VISIT(st, expr, e->v.Slice.upper);
if (e->v.Slice.step)
VISIT(st, expr, e->v.Slice.step)
VISIT(st, expr, e->v.Slice.step);
break;
case Name_kind:
if (!symtable_add_def(st, e->v.Name.id,
Expand Down
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