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Warn about unsafe use of join

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This commit is contained in:
Victor Zverovich 2025-10-02 12:30:55 -04:00
parent d13e5d048d
commit b5b9317a3c
1 changed files with 8 additions and 2 deletions
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10
include/fmt/ranges.h
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@ -18,6 +18,12 @@
#include "format.h" #include "format.h"
#if FMT_HAS_CPP_ATTRIBUTE(clang::lifetimebound)
# define FMT_LIFETIMEBOUND [[clang::lifetimebound]]
#else
# define FMT_LIFETIMEBOUND
#endif
FMT_BEGIN_NAMESPACE FMT_BEGIN_NAMESPACE
FMT_EXPORT FMT_EXPORT
@ -821,12 +827,12 @@ auto join(Range&& r, string_view sep)
* *
* **Example**: * **Example**:
* *
* auto t = std::tuple<int, char>{1, 'a'}; * auto t = std::tuple<int, char>(1, 'a');
* fmt::print("{}", fmt::join(t, ", ")); * fmt::print("{}", fmt::join(t, ", "));
* // Output: 1, a * // Output: 1, a
*/ */
template <typename Tuple, FMT_ENABLE_IF(is_tuple_like<Tuple>::value)> template <typename Tuple, FMT_ENABLE_IF(is_tuple_like<Tuple>::value)>
FMT_CONSTEXPR auto join(const Tuple& tuple, string_view sep) FMT_CONSTEXPR auto join(const Tuple& tuple FMT_LIFETIMEBOUND, string_view sep)
-> tuple_join_view<Tuple, char> { -> tuple_join_view<Tuple, char> {
return {tuple, sep}; return {tuple, sep};
} }