From cd61547b63d72aa645e6e72a8d56cdd071a78232 Mon Sep 17 00:00:00 2001
From: IRainman <a.rainman@gmail.com>
Date: Tue, 30 Dec 2025 00:11:16 +0300
Subject: [PATCH] FASTFLOAT_HAS_BIT_CAST fix for old standards.

---
 include/fast_float/float_common.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/include/fast_float/float_common.h b/include/fast_float/float_common.h
index 6e51143..7191b04 100644
--- a/include/fast_float/float_common.h
+++ b/include/fast_float/float_common.h
@@ -251,11 +251,14 @@ using parse_options = parse_options_t<char>;
 #endif
 
 namespace fast_float {
+#if FASTFLOAT_HAS_BIT_CAST
 template <typename To, typename From>
 fastfloat_really_inline constexpr To bit_cast(const From &from) noexcept {
-#if FASTFLOAT_HAS_BIT_CAST
   return std::bit_cast<To>(from);
+}
 #else
+template <typename To, typename From>
+fastfloat_really_inline To bit_cast(const From &from) noexcept {
   // Implementation of std::bit_cast for pre-C++20.
   static_assert(sizeof(To) == sizeof(From),
                 "bit_cast requires source and destination to be the same size");
@@ -263,8 +266,8 @@ fastfloat_really_inline constexpr To bit_cast(const From &from) noexcept {
   // The cast suppresses a bogus -Wclass-memaccess on GCC.
   std::memcpy(static_cast<void *>(&to), &from, sizeof(to));
   return to;
-#endif
 }
+#endif
 
 fastfloat_really_inline constexpr bool cpp20_and_in_constexpr() noexcept {
 #if FASTFLOAT_HAS_IS_CONSTANT_EVALUATED