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std::experimental::basic_string_view::operator[]

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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().

Contents

[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[], basic_string_view::operator[](size()) has undefined behavior instead of returning CharT().

[edit] Example

#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

[edit] See also

access specified character with bounds checking
(public member function) [edit]