std::basic_string_view<CharT,Traits>::at - cppreference.com (original) (raw)

| constexpr const_reference at( size_type pos ) const; | | (since C++17) | | ------------------------------------------------------ | | ------------- |

Returns a const 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.

[edit] Parameters

[edit] Return value

Const reference to the requested character.

[edit] Exceptions

Throws std::out_of_range if pos >= size().

[edit] Complexity

Constant.

[edit] Example

Possible output:

0: a 1: b 2: c 3: d 4: e 5: f 6: Whooops. Index is out of range. basic_string_view::at: __pos (which is 6) >= this->size() (which is 6)

[edit] See also

| | accesses the specified character (public member function) [edit] | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | accesses the specified character with bounds checking (public member function of std::basic_string<CharT,Traits,Allocator>) [edit] |