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Fix finding string_view on libstdc++ <= c++14

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This commit is contained in:
Mark Harris 2020-09-02 12:51:28 +10:00
parent 6cccdc24bc
commit 59010a4470
1 changed files with 2 additions and 1 deletions
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3
include/fmt/core.h
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@ -227,10 +227,11 @@
// libc++ supports string_view in pre-c++17. // libc++ supports string_view in pre-c++17.
#if (FMT_HAS_INCLUDE(<string_view>) && \ #if (FMT_HAS_INCLUDE(<string_view>) && \
(__cplusplus > 201402L || defined(_LIBCPP_VERSION))) || \ (__cplusplus > 201703L || (__cplusplus > 201402L && defined(_LIBCPP_VERSION)))) || \
(defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910) (defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910)
# include <string_view> # include <string_view>
# define FMT_USE_STRING_VIEW # define FMT_USE_STRING_VIEW
// libstdc++ supports experimental/string_view in c++14
#elif FMT_HAS_INCLUDE("experimental/string_view") && __cplusplus >= 201402L #elif FMT_HAS_INCLUDE("experimental/string_view") && __cplusplus >= 201402L
# include <experimental/string_view> # include <experimental/string_view>
# define FMT_USE_EXPERIMENTAL_STRING_VIEW # define FMT_USE_EXPERIMENTAL_STRING_VIEW