3.3 KiB
[string.view.access]
27 Strings library [strings]
27.3 String view classes [string.view]
27.3.3 Class template basic_string_view [string.view.template]
27.3.3.6 Element access [string.view.access]
constexpr const_reference operator[](size_type pos) const;
Hardened preconditions: pos < size() is true.
[Note 1:
This precondition is stronger than the one on basic_string::operator[].
â end note]
Returns: data_[pos].
Throws: Nothing.
constexpr const_reference at(size_type pos) const;
Returns: data_[pos].
Throws: out_of_range if pos >= size().
constexpr const_reference front() const;
Hardened preconditions: empty() is false.
Returns: data_[0].
Throws: Nothing.
constexpr const_reference back() const;
Hardened preconditions: empty() is false.
Returns: data_[size() - 1].
Throws: Nothing.
constexpr const_pointer data() const noexcept;
Returns: data_.
[Note 2:
Unlike basic_string::data() and string-literals,data() can return a pointer to a buffer that is not null-terminated.
Therefore it is typically a mistake to pass data() to a function that takes just a const charT* and expects a null-terminated string.
â end note]