std::experimental::basic_string_view<CharT,Traits>::at - cppreference.com
From cppreference.com
constexpr const_reference at(size_type pos) const; |
(library fundamentals TS) | |
Returns a reference to the character at specified location pos. Bounds checking is performed, exception of type std::out_of_range will be thrown on invalid access.
Parameters
| pos | - | position of the character to return |
Return value
Reference to the requested character.
Exceptions
Throws std::out_of_range if pos >= size().
Complexity
Constant.