constexpr函数 函数或函数模板可以声明为constexpr。 满足以下全部条件时,函数是适于 constexpr的: 如果它是构造函数或析构函数(C++20 起),那么它的类没有任何虚基类。 它不是虚函数。 (C++20 前) 它的返回类型(如果存在)是字面类型。 它的每个形参类型都是字面类型。
static constexpr struct change_these_options_to_select_what_will_be_printed { constexpr static int longest_macro_name { 45 }; constexpr static bool titles = 1; constexpr static bool counters = 1; constexpr static bool attributes = 1; constexpr static bool standard_values = 1; constexpr ...
constexprstaticstd::string_view value = name(); }; namespace s1 {classMyClass;}intmain(){static_assert(TypeName<s1::MyClass>::value =="s1::MyClass");std::cout<<"FULLNAME void> "<<TypeName<void>::fullname_intern()<<std::endl;std::cout<<"FULLNAME int> "<<TypeName<int>::full...
* This function is used to implement "perfect forwarding". */template<typename_Tp>constexpr_Tp&&forward(typenamestd::remove_reference<_Tp>::type&&__t)noexcept{static_assert(!std::is_lvalue_reference<_Tp>::value,"template argument"" substituting _Tp is an lvalue reference type");returnstatic...
比如gcc有几个控制参数 -fconstexpr-depth=n，限制嵌套计算深度，防止递归函数递归到算不完。。。这个...
defined _MSC_VER #define CONSTEXPR_SETTINGS constexpr #else #define CONSTEXPR_SETTINGS #endif namespace { using aux::session_impl; // std::string is not a literal, so this can't be constexpr aux::array<str_setting_entry_t, settings_pack::num_string_settings> const str_settings ({{ ...
frozen - a header-only, constexpr alternative to gperf for C++14 users. [Apache-2.0] Hashmaps - Implementation of open addressing hash table algorithms in C++. [MIT] hat-trie - C++ implementation of a fast and memory efficient HAT-trie. [MIT] Hopscotch map - A fast header-only hash ma...
propagate_const−ostream_joiner−randint observer_ptr−Detection idiom Standard library extensions v3(library fundamentals TS v3) scope_exit−scope_fail−scope_success−unique_resource Parallelism library extensions v2 (parallelism TS v2)
cpp constexpr cpp 的运行时容器,函数库有stl, constexpr库可以考虑 Sprout ,https://github.com/bolero-MURAKAMI/Sprout.git 最后编辑于:2017.12.10 14:05:05
// To mitigate this thundering herd problem, we 'll just align the wake up time // to 128ms. We can experiment with 256ms or 64ms, though 128ms seems fine static constexpr const uint64_t alignment = 128; static_assert(std::is_same<decltype(alignment), const uint64_t>::value...