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Add [[trivial_abi]] to Detail::unique_ptr when compiled with Clang 

This decreases code size and improves performance of passing around
`unique_ptr` instances by value somewhat. It virtually guarantees
problems when combining code compiled with Clang and GCC, but that
was never supported anyway.
This commit is contained in:
Martin Hořeňovský 2021-09-30 20:10:56 +02:00
parent eb452e9b35
commit 1d79683ea8
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1 changed files with 10 additions and 1 deletions
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11
src/catch2/internal/catch_unique_ptr.hpp
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@ -11,13 +11,22 @@
#include <cassert> #include <cassert>
#include <type_traits> #include <type_traits>
#if defined(__clang__) && defined(__has_attribute)
# if __has_attribute(trivial_abi)
# define TRIVIAL_ABI [[clang::trivial_abi]]
# endif
#endif
#if !defined(TRIVIAL_ABI)
# define TRIVIAL_ABI
#endif
namespace Catch { namespace Catch {
namespace Detail { namespace Detail {
// reimplementation of unique_ptr for improved compilation times // reimplementation of unique_ptr for improved compilation times
// Does not support custom deleters (and thus does not require EBO) // Does not support custom deleters (and thus does not require EBO)
// Does not support arrays // Does not support arrays
template <typename T> template <typename T>
class unique_ptr { class TRIVIAL_ABI unique_ptr {
T* m_ptr; T* m_ptr;
public: public:
constexpr unique_ptr(std::nullptr_t = nullptr): constexpr unique_ptr(std::nullptr_t = nullptr):