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constexpr size_type size()constnoexcept; | (since C++17) | |
constexpr size_type length()constnoexcept; | (since C++17) | |
Returns the number ofCharT elements in the view, i.e.std::distance(begin(), end()).
Contents |
(none)
The number ofCharT elements in the view.
Constant.
#include <iostream>#include <string_view> // Print a string surrounded by single quotes, its// length and whether it is considered empty.void check_string(std::string_view ref){std::cout<<std::boolalpha<<"'"<< ref<<"' has "<< ref.size()<<" character(s); emptiness: "<< ref.empty()<<'\n';} int main(int argc,char**argv){// An empty string check_string(""); // Almost always not empty: argv[0]if(argc>0) check_string(argv[0]);}
Possible output:
'' has 0 character(s); emptiness: true'./a.out' has 7 character(s); emptiness: false
| checks whether the view is empty (public member function)[edit] | |
| returns the maximum number of characters (public member function)[edit] | |
| returns the number of characters (public member function of std::basic_string<CharT,Traits,Allocator>)[edit] |
