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Fix compatibility with older versions of VS (#4271)

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YexuanXiao 2024-12-23 23:26:11 +08:00 committed by GitHub
parent d8a79eafdc
commit 86dae01c23
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1 changed files with 10 additions and 2 deletions
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12
include/fmt/ostream.h
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@ -22,6 +22,14 @@
#include "chrono.h" // formatbuf
#ifdef _MSVC_STL_UPDATE
# define FMT_MSVC_STL_UPDATE _MSVC_STL_UPDATE
#elif defined(_MSC_VER) && _MSC_VER < 1912 // VS 15.5
# define FMT_MSVC_STL_UPDATE _MSVC_LANG
#else
# define FMT_MSVC_STL_UPDATE 0
#endif
FMT_BEGIN_NAMESPACE
namespace detail {
@ -35,7 +43,7 @@ class file_access {
friend auto get_file(BufType& obj) -> FILE* { return obj.*FileMemberPtr; }
};
#ifdef _MSVC_STL_UPDATE
#if FMT_MSVC_STL_UPDATE
template class file_access<file_access_tag, std::filebuf,
&std::filebuf::_Myfile>;
auto get_file(std::filebuf&) -> FILE*;
@ -109,7 +117,7 @@ inline void vprint(std::ostream& os, string_view fmt, format_args args) {
auto buffer = memory_buffer();
detail::vformat_to(buffer, fmt, args);
FILE* f = nullptr;
#if defined(_MSVC_STL_UPDATE) && FMT_USE_RTTI
#if FMT_MSVC_STL_UPDATE && FMT_USE_RTTI
if (auto* buf = dynamic_cast<std::filebuf*>(os.rdbuf()))
f = detail::get_file(*buf);
#elif defined(_WIN32) && defined(__GLIBCXX__) && FMT_USE_RTTI