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

constexpr const_reference front() const;

(since C++17)

Returns reference to the first character in the view.

If empty() is true, the behavior is undefined.

(until C++26)

If empty() is true:

If the implementation is hardened, a contract violation occurs.
If the implementation is not hardened, the behavior is undefined.

(since C++26)

Return value

data_[0]

Complexity

Constant.

Example

#include <iostream>
#include <string_view>

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

back	accesses the last character (public member function)
empty	checks whether the view is empty (public member function)
front (DR*)	accesses the first character (public member function of `std::basic_string<CharT,Traits,Allocator>`)

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

Return value

Complexity

Example

See also