std::basic_string_view<CharT,Traits>::operator[]
From cppreference.com
< cpp | string | basic string view
| constexpr const_reference operator[]( size_type pos ) const; |
(since C++17) | |
Returns a const reference to the character at specified location pos.
No bounds checking is performed: the behavior is undefined if pos >= size().
Contents[hide] |
[edit] Parameters
| pos | - | position of the character to return |
[edit] Return value
Const reference to the requested character.
[edit] Exceptions
Does not throw.
[edit] Complexity
Constant.
[edit] Notes
Unlike std::basic_string::operator[], std::basic_string_view::operator[](size()) has undefined behavior instead of returning CharT().
[edit] Example
Run this code
#include <iostream> #include <string_view> int main() { std::string str = "Exemplar"; std::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
[edit] See also
| accesses the specified character with bounds checking (public member function) | |
| accesses the specified character (public member function of std::basic_string<CharT,Traits,Allocator>)
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