leavelet/fmt
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Demacrify

Browse Source
This commit is contained in:
Victor Zverovich
2019-05-30 20:50:07 -07:00
parent 637bf3c6d9
commit 49f78a427b
2 changed files with 43 additions and 36 deletions
Download Patch File Download Diff File Expand all files Collapse all files

49
include/fmt/core.h
View File

@@ -187,25 +187,34 @@
# define FMT_ASSERT(condition, message) assert((condition) && message)
#endif
// libc++ supports string_view in pre-c++17.
#if (FMT_HAS_INCLUDE(<string_view>) && \
(__cplusplus > 201402L || defined(_LIBCPP_VERSION))) || \
(defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910)
# include <string_view>
# define FMT_STRING_VIEW std::basic_string_view
#elif FMT_HAS_INCLUDE("experimental/string_view") && __cplusplus >= 201402L
# include <experimental/string_view>
# define FMT_STRING_VIEW std::experimental::basic_string_view
#endif
// An enable_if helper to be used in template parameters. enable_if in template
// parameters results in much shorter symbols: https://godbolt.org/z/sWw4vP.
#define FMT_ENABLE_IF_T(...) typename std::enable_if<(__VA_ARGS__), int>::type
#define FMT_ENABLE_IF(...) FMT_ENABLE_IF_T(__VA_ARGS__) = 0
// libc++ supports string_view in pre-c++17.
#if (FMT_HAS_INCLUDE(<string_view>) && \
(__cplusplus > 201402L || defined(_LIBCPP_VERSION))) || \
(defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910)
# include <string_view>
# define FMT_USE_STRING_VIEW
#elif FMT_HAS_INCLUDE("experimental/string_view") && __cplusplus >= 201402L
# include <experimental/string_view>
# define FMT_USE_EXPERIMENTAL_STRING_VIEW
#endif
FMT_BEGIN_NAMESPACE
namespace internal {
#if defined(FMT_USE_STRING_VIEW)
template <typename Char> using std_string_view = std::basic_string_view<Char>;
#elif defined(FMT_USE_EXPERIMENTAL_STRING_VIEW)
template <typename Char>
using std_string_view = std::experimental::basic_string_view<Char>;
#else
template <typename T> struct std_string_view {};
#endif
template <typename> struct result_of;
#if (__cplusplus >= 201703L || \
@@ -396,11 +405,11 @@ template <typename Char> class basic_string_view {
FMT_NOEXCEPT : data_(s.data()),
size_(s.size()) {}
#ifdef FMT_STRING_VIEW
FMT_CONSTEXPR basic_string_view(FMT_STRING_VIEW<Char> s) FMT_NOEXCEPT
: data_(s.data()),
size_(s.size()) {}
#endif
template <
typename S,
FMT_ENABLE_IF(std::is_same<S, internal::std_string_view<Char>>::value)>
FMT_CONSTEXPR basic_string_view(S s) FMT_NOEXCEPT : data_(s.data()),
size_(s.size()) {}
/** Returns a pointer to the string data. */
FMT_CONSTEXPR const Char* data() const { return data_; }
@@ -486,12 +495,12 @@ inline basic_string_view<Char> to_string_view(const Char* s) {
return s;
}
#ifdef FMT_STRING_VIEW
template <typename Char>
inline basic_string_view<Char> to_string_view(FMT_STRING_VIEW<Char> s) {
template <typename Char,
FMT_ENABLE_IF(!std::is_empty<internal::std_string_view<Char>>::value)>
inline basic_string_view<Char> to_string_view(
internal::std_string_view<Char> s) {
return s;
}
#endif
// A base class for compile-time strings. It is defined in the fmt namespace to
// make formatting functions visible via ADL, e.g. format(fmt("{}"), 42).