diff options
Diffstat (limited to 'libcxx/include/ios')
| -rw-r--r-- | libcxx/include/ios | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/libcxx/include/ios b/libcxx/include/ios index cbea478a74a..dfeb1f62eed 100644 --- a/libcxx/include/ios +++ b/libcxx/include/ios @@ -585,9 +585,22 @@ public: typedef typename traits_type::pos_type pos_type; typedef typename traits_type::off_type off_type; +#if defined(_LIBCPP_CXX03_LANG) +private: + struct __bool_tag {}; + typedef void (basic_ios::*_BoolType)(__bool_tag) const; + void __true_value(__bool_tag) const {} + +public: + _LIBCPP_ALWAYS_INLINE + operator _BoolType() const { + return !fail() ? &basic_ios::__true_value : nullptr; + } +#else _LIBCPP_ALWAYS_INLINE - _LIBCPP_EXPLICIT - operator bool() const {return !fail();} + _LIBCPP_EXPLICIT operator bool() const {return !fail();} +#endif + _LIBCPP_ALWAYS_INLINE bool operator!() const {return fail();} _LIBCPP_ALWAYS_INLINE iostate rdstate() const {return ios_base::rdstate();} _LIBCPP_ALWAYS_INLINE void clear(iostate __state = goodbit) {ios_base::clear(__state);} |
