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是否已经有一个 constexpr std::bit_cast 与 g++ 一起使用

[英]Is there already a constexpr std::bit_cast to use with g++

原文 2019-11-29 10:18:01 3 1 c++/ c++20

I wonder if there is a usable constexpr std::bit_cast or equivalent already for g++-trunk in c++2a mode.我想知道在 c++2a 模式下是否有可用的constexpr std::bit_cast或等效的 g++-trunk 。 I need this for a compile-time-check.我需要这个来进行编译时检查。

1 个解决方案

根据cppreference ， std::bit_cast日， std::bit_cast尚未在任何主要 C++ 编译器中实现。

带有 std::array 的 std::bit_cast - std::bit_cast with std::array

没有编译器支持 constexpr memcpy 的 bit_cast 可能吗？ - is bit_cast without compiler support for constexpr memcpy possible?

C++11 中 std::bit_cast 的安全等效项 - Safe equivalent of std::bit_cast in C++11

通过 std::bit_cast()ed 指针对访问进行别名访问 - Aliasing accesses through a std::bit_cast()ed pointer

G ++和STD 11的constexpr有问题 - G++ and STD 11 has problems with constexpr

`bit_cast` arrays 到 arrays - `bit_cast` arrays to arrays

static_cast 之间有区别吗<unsigned> （有符号） vs std::bit_cast<unsigned> （签）？ - Is there difference between static_cast<unsigned>(signed) vs std::bit_cast<unsigned>(signed)?

文件 I/O 中的 std::bit_cast 与 reinterpret_cast - std::bit_cast vs reinterpret_cast in file I/O

std::bit_cast 和 std::start_lifetime_as 之间有什么有用的区别吗？ - Any useful difference between std::bit_cast and std::start_lifetime_as?

可以使用 std::bit_cast 从 std::span 转换<A>到 std::span<B>并像访问对象 B 一样访问吗？</a> - Can std::bit_cast be used to cast from std::span<A> to std::span<B> and access as if there was an array of object B?

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相关问题 带有 std::array 的 std::bit_cast - std::bit_cast with std::array 没有编译器支持 constexpr memcpy 的 bit_cast 可能吗？ - is bit_cast without compiler support for constexpr memcpy possible? C++11 中 std::bit_cast 的安全等效项 - Safe equivalent of std::bit_cast in C++11 通过 std::bit_cast()ed 指针对访问进行别名访问 - Aliasing accesses through a std::bit_cast()ed pointer G ++和STD 11的constexpr有问题 - G++ and STD 11 has problems with constexpr `bit_cast` arrays 到 arrays - `bit_cast` arrays to arrays static_cast 之间有区别吗<unsigned> （有符号） vs std::bit_cast<unsigned> （签）？ - Is there difference between static_cast<unsigned>(signed) vs std::bit_cast<unsigned>(signed)? 文件 I/O 中的 std::bit_cast 与 reinterpret_cast - std::bit_cast vs reinterpret_cast in file I/O std::bit_cast 和 std::start_lifetime_as 之间有什么有用的区别吗？ - Any useful difference between std::bit_cast and std::start_lifetime_as? 可以使用 std::bit_cast 从 std::span 转换<A>到 std::span<B>并像访问对象 B 一样访问吗？</a> - Can std::bit_cast be used to cast from std::span<A> to std::span<B> and access as if there was an array of object B?

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