std::experimental::basic_string_view<CharT,Traits>::operator[]
From cppreference.com
< cpp | experimental | basic string view
| constexpr const_reference operator[](size_type pos) const; |
(library fundamentals TS) | |
Returns a const reference to the character at specified location pos.
No bounds checking is performed: the behavior is undefined if pos >= size().
Parameters
| pos | - | position of the character to return |
Return value
Const reference to the requested character
Exceptions
Does not throw
Complexity
Constant.
Notes
Unlike std::basic_string::operator[], basic_string_view::operator[](size()) has undefined behavior instead of returning CharT().
Example
Run this code
#include <iostream> #include <experimental/string_view> int main() { std::string str = "Exemplar"; std::experimental::string_view v = str; std::cout << v[2] << '\n'; // v[2] = 'y'; // Error: cannot modify through a string view str[2] = 'y'; std::cout << v[2] << '\n'; }
Output:
e y
See also
| access specified character with bounds checking (public member function) |