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assert: Support types without operator== (int) [BZ #21972]

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This commit is contained in:
Florian Weimer
2017-08-21 13:03:29 +02:00
parent 41e673c1e7
commit b5889d25e9
5 changed files with 128 additions and 7 deletions
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16
assert/assert.h
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@ -85,7 +85,12 @@ __END_DECLS
/* When possible, define assert so that it does not add extra
parentheses around EXPR. Otherwise, those added parentheses would
suppress warnings we'd expect to be detected by gcc's -Wparentheses. */
# if !defined __GNUC__ || defined __STRICT_ANSI__
# if defined __cplusplus
# define assert(expr) \
(static_cast <bool> (expr) \
? void (0) \
: __assert_fail (#expr, __FILE__, __LINE__, __ASSERT_FUNCTION))
# elif !defined __GNUC__ || defined __STRICT_ANSI__
# define assert(expr) \
((expr) \
? __ASSERT_VOID_CAST (0) \
@ -93,12 +98,11 @@ __END_DECLS
# else
/* The first occurrence of EXPR is not evaluated due to the sizeof,
but will trigger any pedantic warnings masked by the __extension__
for the second occurrence. The explicit comparison against zero is
required to support function pointers and bit fields in this
context, and to suppress the evaluation of variable length
arrays. */
for the second occurrence. The ternary operator is required to
support function pointers and bit fields in this context, and to
suppress the evaluation of variable length arrays. */
# define assert(expr) \
((void) sizeof ((expr) == 0), __extension__ ({ \
((void) sizeof ((expr) ? 1 : 0), __extension__ ({ \
if (expr) \
; /* empty */ \
else \