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Reject modernity, embrace tradition

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This commit is contained in:
Victor Zverovich 2024-08-30 11:00:38 -07:00
parent 64313e915c
commit c0fab5e2f7
1 changed files with 18 additions and 1 deletions
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19
include/fmt/format.h
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@ -46,6 +46,7 @@
# include <cstring> // std::memcpy
# include <initializer_list> // std::initializer_list
# include <limits> // std::numeric_limits
# include <new> // std::bad_alloc
# if defined(__GLIBCXX__) && !defined(_GLIBCXX_USE_DUAL_ABI)
// Workaround for pre gcc 5 libstdc++.
# include <memory> // std::allocator_traits
@ -789,6 +790,22 @@ template <typename T, typename Enable = void>
struct is_locale : std::false_type {};
template <typename T>
struct is_locale<T, void_t<decltype(T::classic())>> : std::true_type {};
// An allocator that uses malloc/free to allow removing dependency on the C++
// standard libary runtime.
template <typename T> struct allocator {
using value_type = T;
T* allocate(size_t n) {
FMT_ASSERT(n <= max_value<size_t>() / sizeof(T), "");
T* p = static_cast<T*>(malloc(n * sizeof(T)));
if (!p) FMT_THROW(std::bad_alloc());
return p;
}
void deallocate(T* p, size_t) { free(p); }
};
} // namespace detail
FMT_BEGIN_EXPORT
@ -811,7 +828,7 @@ enum { inline_buffer_size = 500 };
* converted to `std::string` with `to_string(out)`.
*/
template <typename T, size_t SIZE = inline_buffer_size,
typename Allocator = std::allocator<T>>
typename Allocator = detail::allocator<T>>
class basic_memory_buffer : public detail::buffer<T> {
private:
T store_[SIZE];