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Make enable_if_t more std-like and move to fmt namespace

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This commit is contained in:
Victor Zverovich
2019-06-01 09:35:02 -07:00
parent 78daa50ffc
commit 67feef5589
3 changed files with 10 additions and 6 deletions
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12
include/fmt/core.h
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@ -199,6 +199,11 @@
#endif #endif
FMT_BEGIN_NAMESPACE FMT_BEGIN_NAMESPACE
// An implementation of enable_if_t for pre-C++14 systems.
template <bool B, class T = void>
using enable_if_t = typename std::enable_if<B, T>::type;
namespace internal { namespace internal {
#if defined(FMT_USE_STRING_VIEW) #if defined(FMT_USE_STRING_VIEW)
@ -210,10 +215,9 @@ using std_string_view = std::experimental::basic_string_view<Char>;
template <typename T> struct std_string_view {}; template <typename T> struct std_string_view {};
#endif #endif
// An enable_if helper to be used in template parameters. enable_if in template // An enable_if helper to be used in template parameters which results in much
// parameters results in much shorter symbols: https://godbolt.org/z/sWw4vP. // shorter symbols: https://godbolt.org/z/sWw4vP.
template <bool B> using enable_if_t = typename std::enable_if<B, int>::type; #define FMT_ENABLE_IF(...) enable_if_t<__VA_ARGS__, int> = 0
#define FMT_ENABLE_IF(...) internal::enable_if_t<__VA_ARGS__> = 0
#if (__cplusplus >= 201703L || \ #if (__cplusplus >= 201703L || \
(defined(_MSVC_LANG) && _MSVC_LANG >= 201703L)) && \ (defined(_MSVC_LANG) && _MSVC_LANG >= 201703L)) && \

2
include/fmt/format-inl.h
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@ -674,7 +674,7 @@ template <int GRISU_VERSION> struct grisu_shortest_handler {
} }
}; };
template <typename Double, enable_if_t<sizeof(Double) == sizeof(uint64_t)>> template <typename Double, enable_if_t<sizeof(Double) == sizeof(uint64_t), int>>
FMT_API bool grisu_format(Double value, buffer<char>& buf, int precision, FMT_API bool grisu_format(Double value, buffer<char>& buf, int precision,
unsigned options, int& exp) { unsigned options, int& exp) {
FMT_ASSERT(value >= 0, "value is negative"); FMT_ASSERT(value >= 0, "value is negative");

2
include/fmt/format.h
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@ -2245,7 +2245,7 @@ FMT_CONSTEXPR bool do_check_format_string(basic_string_view<Char> s,
} }
template <typename... Args, typename S, template <typename... Args, typename S,
internal::enable_if_t<is_compile_string<S>::value>> enable_if_t<is_compile_string<S>::value, int>>
void check_format_string(S format_str) { void check_format_string(S format_str) {
typedef typename S::char_type char_t; typedef typename S::char_type char_t;
FMT_CONSTEXPR_DECL bool invalid_format = FMT_CONSTEXPR_DECL bool invalid_format =