bit_cast<double>(u64v2); static_assert(std::bit_cast<std::uint64_t>(f64v2) == u64v2); // 往返测试 int main() { std::cout << "std::bit_cast<std::uint64_t>(" << std::fixed << f64v << ") == 0x" << std::hex << u64v << '\n' << "std::bit_cast<double>...
const在您的示例中,您通过左值引用将位字段传递给std::bit_cast. 位字段不能绑定到引用。相反,所发生的情况是,引用类型的新对象被创建为具有位字段值的临时对象。然后,将该临时对象绑定到bit_cast参数中的引用,并将bit_cast其作为源进行操作。 所以,这里什么也没有发生。在这两种情况下,源对象都已经是您尝试的...
bit_cast是C++20支持的按字节进行转换的方法,如: auto a = std::bit_cast<std::array<char, sizeof(p)>>(p); 在头文件中定义如下: //Defined in header <bit> template< class To, class From > constexpr To bit_cast( const From& from ) noexcept; 通过重新解释 From 的对象表示来获取 To...
int intValue2 = std::bit_cast<int>(floatValue2); std::cout << "floatValue2: " << floatValue2 << ", intValue2: " << intValue2 << std::endl; // 示例3:数组的类型转换 int intArray[4] = {1, 2, 3, 4}; float floatArray[4] = std::bit_cast<float[4]>(intArray); std...
大多数情况下不应该用指针或引用类型间的reinterpret_cast(或等价的显式转型)转译对象表示,因为类型别名使用规则。 在std::bit_cast前,需要翻译对象表示为另一类型的对象表示时,能使用std::memcpy: template <class To, class From> typenamestd::enable_if_t< sizeof(To) == sizeof(From) &&std::is_trivia...
在std::bit_cast 前,需要翻译对象表示为另一类型的对象表示时,能使用 std::memcpy: template <class To, class From> typename std::enable_if< (sizeof(To) == sizeof(From)) && std::is_trivially_copyable<From>::value && std::is_trivial<To>::value, // 此实现要求 To 可平凡默认构造 To...
class T2, class T1> T2 cpp11_bit_cast(T1 t1) { static_assert(sizeof(T1)==sizeof(T2), "Types must match sizes"); static_assert(std::is_pod<T1>::value, "Requires POD input"); static_assert(std::is_pod<T2>::value, "Requires POD output"...
Before std::bit_cast, std::memcpy can be used when it is needed to interpret the object representation as one of another type: template <class To, class From> typename std::enable_if< (sizeof(To) == sizeof(From)) && std::is_trivially_copyable<From>::value && std::is_trivial<To...
问std::bit_cast在C++11中的安全等价ENtemplate<classT2,classT1>T2cpp11_bit_cast(T1t1){static_...
Bug type: Language Service Describe the bug OS and Version: Windows 10.0.19043 Build 19043 VS Code Version: 1.62.3 C/C++ Extension Version: v1.7.1 The bug Intellisense marks std::bit_cast<>() as not being defined even though it is, also ...