1、constexpr产⽣背景 c++11以后，为了保证写出的代码⽐以往任何时候的执⾏效率都要好⽽进⾏了许多改善。其中，这种改善之⼀就是⽣成常量表达式，允许程序利⽤编译时的计算能⼒。常量表达式主要是允许⼀些计算发⽣在编译时期，⽽不是运⾏时期。这是⼀个很进步的优化：假如有些事情可以在编译...
如果具有静态或线程存储持续时间的对象由构造函数调用初始化，如果构造函数是constexpr构造函数，如果所有...
而不是SFINAE，这是因为导致lambda调用不是常量表达式的求值发生在被调用函数的函数体内部（即lambda的函数...
今天在阅读代码的时候看到了if constexpr语法,查了一下文档,是c++17引入的新语义。那么,为什么要引入if-constexpr呢?是为了解决什么痛点呢? 比如说我们有一个转换字符串的函数toStr,代码如下: template<typenameT>std::stringtoStr(Tt){if(std::is_same_v<T,std::string>)returnt;elsereturnstd::to_string(...
See also: https://www.codingame.com/playgrounds/2205/7-features-of-c17-that-will-simplify-your-code/inline-variables Share Improve this answer Follow edited Feb 1, 2021 at 20:37 answered Feb 1, 2021 at 20:25 zkoza 2,82933 gold badges1717 silver badges2525 bronze badges Add a com...
<eof> parser at end of file #0 0x000055e92c1808df llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x40728df) #1 0x000055e92c17e61c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin...
min_element()/max_element()/minmax_element() (same reason) numeric_limits<float/double/long double>::quiet_NaN()/signaling_NaN() (requires compiler magic, as far as I can tell) mutex’s default constructor (needs to be significantly overhauled after we can drop support for XP ...
Your open channel to Microsoft engineering teams c++17 wrong debug visualization on std::vector> Closed - Not a Bug16 0Votes lclorenzo castellani -Reported Mar 01, 2024 4:14 PM The inline debugger visualizzation of std::vector<std:tuple<double,bouble>> is wrong in...
min_element()/max_element()/minmax_element() (same reason) numeric_limits<float/double/long double>::quiet_NaN()/signaling_NaN() (requires compiler magic, as far as I can tell) mutex’s default constructor (needs to be significantly overhauled after we can drop support for XP targeting)...