Merge remote-tracking branch 'upstream/master'

1 files changed, 12 insertions, 0 deletions

diff --git a/common/albit.h b/common/albit.h
index ad596208..82a4a00d 100644
--- a/common/albit.h
+++ b/common/albit.h
@@ -2,7 +2,9 @@
 #define AL_BIT_H
 
 #include <cstdint>
+#include <cstring>
 #include <limits>
+#include <new>
 #include <type_traits>
 #if !defined(__GNUC__) && (defined(_WIN32) || defined(_WIN64))
 #include <intrin.h>
@@ -10,6 +12,16 @@
 
 namespace al {
 
+template<typename To, typename From>
+std::enable_if_t<sizeof(To) == sizeof(From) && std::is_trivially_copyable_v<From>
+    && std::is_trivially_copyable_v<To>,
+To> bit_cast(const From &src) noexcept
+{
+    alignas(To) char dst[sizeof(To)];
+    std::memcpy(&dst[0], &src, sizeof(To));
+    return *std::launder(reinterpret_cast<To*>(&dst[0]));
+}
+
 #ifdef __BYTE_ORDER__
 enum class endian {
     little = __ORDER_LITTLE_ENDIAN__,