24 Strings library [strings]

24.4 String view classes [string.view]

constexpr basic_string_view() noexcept;

Effects: Constructs an empty basic_string_view.

Postconditions: size_ == 0 and data_ == nullptr.

constexpr basic_string_view(const charT* str);

Requires: [str, str + traits::length(str)) is a valid range.

Effects: Constructs a basic_string_view, with the postconditions in Table 59 .

Table 59 — basic_string_view(const charT*) effects

Complexity:

O (traits::length(str))

constexpr basic_string_view(const charT* str, size_type len);

Requires: [str, str + len) is a valid range.

Effects: Constructs a basic_string_view, with the postconditions in Table 60 .

Table 60 — basic_string_view(const charT*, size_type) effects