diff options
Diffstat (limited to 'math/math.h')
| -rw-r--r-- | math/math.h | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/math/math.h b/math/math.h index 275534be11..b5d6c43fcf 100644 --- a/math/math.h +++ b/math/math.h @@ -474,7 +474,24 @@ enum # include <bits/iscanonical.h> /* Return nonzero value if X is a signaling NaN. */ -# define issignaling(x) __MATH_TG ((x), __issignaling, (x)) +# ifndef __cplusplus +# define issignaling(x) __MATH_TG ((x), __issignaling, (x)) +# else + /* In C++ mode, __MATH_TG cannot be used, because it relies on + __builtin_types_compatible_p, which is a C-only builtin. On the + other hand, overloading provides the means to distinguish between + the floating-point types. The overloading resolution will match + the correct parameter (regardless of type qualifiers (i.e.: const + and volatile). */ +extern "C++" { +inline int issignaling (float __val) { return __issignalingf (__val); } +inline int issignaling (double __val) { return __issignaling (__val); } +inline int issignaling (long double __val) { return __issignalingl (__val); } +# if __HAVE_DISTINCT_FLOAT128 +inline int issignaling (_Float128 __val) { return __issignalingf128 (__val); } +# endif +} /* extern C++ */ +# endif /* Return nonzero value if X is subnormal. */ # define issubnormal(x) (fpclassify (x) == FP_SUBNORMAL) |