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Fix string_view detection

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This commit is contained in:
Victor Zverovich 2018-03-26 07:00:41 -10:00
parent 6957d28cfb
commit 4fea018b2d
1 changed files with 4 additions and 3 deletions
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7
include/fmt/core.h
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@ -155,9 +155,10 @@
Type(const Type &) FMT_DELETED; \ Type(const Type &) FMT_DELETED; \
void operator=(const Type &) FMT_DELETED void operator=(const Type &) FMT_DELETED
#if (FMT_HAS_INCLUDE(<string_view>) && __cplusplus > 201402L) || \ // libc++ supports string_view in pre-c++17.
(defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910) || \ #if (FMT_HAS_INCLUDE(<string_view>) && \
_LIBCPP_VERSION // libc++ supports string_view in pre-c++17 (__cplusplus > 201402L || _LIBCPP_VERSION)) || \
(defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910)
# include <string_view> # include <string_view>
# define FMT_USE_STD_STRING_VIEW # define FMT_USE_STD_STRING_VIEW
// std::experimental::basic_string_view::remove_prefix isn't constexpr until // std::experimental::basic_string_view::remove_prefix isn't constexpr until