std::basic_string_view<CharT,Traits>::front

constexpr const_reference front() const;
 (since C++17)

Returns reference to the first character in the view. The behavior is undefined if empty() == true.

Parameters

(none)

Return value

reference to the first character, equivalent to operator[](0).

Complexity

Constant.

Example

#include <string_view>
#include <iostream>
 
int main() {
    for (std::string_view str{"ABCDEF"}; !str.empty(); str.remove_prefix(1))
        std::cout << str.front() << ' ' << str << '\n';
}

Output:

A ABCDEF
B BCDEF
C CDEF
D DEF
E EF
F F

See also

(C++17)
 accesses the last character
(public member function)
(C++17)
 checks whether the view is empty
(public member function)
(C++11)
 accesses the first character
(public member function of std::basic_string<CharT,Traits,Allocator>)