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fix: apply simpler expression with fewer workarounds
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1fafd1b447
@ -927,18 +927,17 @@ protected:
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using Constructor = void *(*)(const void *);
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/* Only enabled when the types are {copy,move}-constructible *and* when the type
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does not have a private operator new implementation. */
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does not have a private operator new implementation. A comma operator is used in the decltype
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argument to apply SFINAE to the public copy/move constructors.*/
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template <typename T, typename = enable_if_t<is_copy_constructible<T>::value>>
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static auto make_copy_constructor(const T *x) -> decltype(new T(*x), Constructor{}) {
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PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100(x);
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static auto make_copy_constructor(const T *) -> decltype(new T(std::declval<const T>()), Constructor{}) {
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return [](const void *arg) -> void * {
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return new T(*reinterpret_cast<const T *>(arg));
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};
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}
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template <typename T, typename = enable_if_t<std::is_move_constructible<T>::value>>
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static auto make_move_constructor(const T *x) -> decltype(new T(std::move(*const_cast<T *>(x))), Constructor{}) {
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PYBIND11_WORKAROUND_INCORRECT_MSVC_C4100(x);
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static auto make_move_constructor(const T *) -> decltype(new T(std::declval<T&&>()), Constructor{}) {
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return [](const void *arg) -> void * {
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return new T(std::move(*const_cast<T *>(reinterpret_cast<const T *>(arg))));
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};
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