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Move FMT_API from ostream class to members (#4584)

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Putting FMT_API on the class definition propagates it to the base class
detail::buffer<char>'s members. However, MSVC not emit definitions for
inline members unless it sees the symbols as FMT_API when compiling.

This fix removes the FMT_API declaration from the class itself and marks
individual non-inline members as FMT_API to address the issue.

Fixes https://github.com/fmtlib/fmt/issues/4576
This commit is contained in:
Fatih BAKIR
2025-10-20 07:49:23 -07:00
committed by GitHub
parent 08d38d6e78
commit d6bdb69c62
1 changed files with 5 additions and 5 deletions
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10
include/fmt/os.h
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@@ -365,17 +365,17 @@ FMT_INLINE_VARIABLE constexpr auto buffer_size = detail::buffer_size();
/// A fast buffered output stream for writing from a single thread. Writing from
/// multiple threads without external synchronization may result in a data race.
class FMT_API ostream : private detail::buffer<char> {
class ostream : private detail::buffer<char> {
private:
file file_;
ostream(cstring_view path, const detail::ostream_params& params);
FMT_API ostream(cstring_view path, const detail::ostream_params& params);
static void grow(buffer<char>& buf, size_t);
FMT_API static void grow(buffer<char>& buf, size_t);
public:
ostream(ostream&& other) noexcept;
~ostream();
FMT_API ostream(ostream&& other) noexcept;
FMT_API ~ostream();
operator writer() {
detail::buffer<char>& buf = *this;