std::string;s1;=;"Hello\0World"; auto;s2=;"Hello\0World"s;s1.size()的值是5s2.size()的值是11#include; #include; using;namespace;std::string_literals; int;main();{ ;;const;char*;s;=;R"Hello World"; ;;std::cout;<<;s; ...
std::chrono::duration还定义operator""s,以表示文字秒,但它是算术文字:10.0s和10s是十秒钟,但是"10"s是一根绳子。 例 二次 代码语言:javascript 复制 #include<string>#include<iostream>intmain(){using namespace std::string_literals;std::string s1="abc\0\0def";std::string s2="abc\0\0def"s;...
usingnamespacestd::string_literals, or usingnamespacestd::literals::string_literals. std::chrono::durationalso definesoperator""s, to represent literal seconds, but it is an arithmetic literal:10.0sand10sare ten seconds, but"10"sis a string. ...
对这些运算符的访问能用usingnamespacestd::literals、usingnamespacestd::string_literals及usingnamespacestd::literals::string_literals获得。 std::chrono::duration亦定义operator""s以表示字面量的秒,但它是算术字面量:10.0s与10s是十秒,但"10"s是字符串。 S S s(C++14 起)...
std::literals::complex_literals (C++14) std::literals::string_literals (C++14) std::literals::string_view_literals (C++17) This page tries to list all the symbols that are available from thestandard libraryin the namespacestd::literals::string_literals. The symbols are written as follows: ...
Access to these operators can be gained with using namespace std::literals, using namespace std::string_literals, and using namespace std::literals::string_literals. std::chrono::duration also defines operator""s, to represent literal seconds, but it is an arithmetic literal: 10.0s and ...
std::literals::string_view_literals::operator""sv 在标头<string_view>定义 constexprstd::string_view operator""sv(constchar*str,std::size_tlen)noexcept; (1)(C++17 起) constexprstd::u8string_view operator""sv(constchar8_t*str,std::size_tlen)noexcept; ...
这些运算符在命名空间中声明。std::literals::string_view_literals,两者都是literals和string_view_literals是内联命名空间。可以通过以下方式访问这些操作员using namespace std::literals,,,using namespace std::string_view_literals,和using namespace std::literals::string_view_literals... ...
usingnamespacestd::literals, usingnamespacestd::string_view_literals, or usingnamespacestd::literals::string_view_literals. Example Run this code #include <iostream>#include <string_view>#include <typeinfo>voidprint_each_character(conststd::string_viewsw){for(charc:sw)std::cout<<(c=='\0'...
These operators are declared in the namespace std::literals::string_view_literals, where both literals and string_view_literals are inline namespaces. Access to these operators can be gained with using namespace std::literals, using namespace std::string_view_literals, and using namespace std:...