std::basic_string_view<CharT,Traits>::starts_with
< cpp | string | basic string view
constexpr bool starts_with(basic_string_view x) const noexcept; |
(1) | (since C++20) |
constexpr bool starts_with(CharT x) const noexcept; |
(2) | (since C++20) |
constexpr bool starts_with(const CharT* x) const; |
(3) | (since C++20) |
Checks if the string view begins with the given prefix, where
1) the prefix is a string view. Effectively returns size() >= x.size() && compare(0, x.size(), x) == 0
2) the prefix is a single character. Effectively returns !empty() && Traits::eq(front(), x)
3) the prefix is a C-style string. Effectively returns starts_with(basic_string_view(x))
Parameters
x | - | a character sequence or a single character to compare to the start of the string view |
Return value
true if the string view begins with the provided prefix, false otherwise.
Example
This section is incomplete Reason: no example |
See also
(C++20) |
checks if the string view ends with the given suffix (public member function) |
(C++20) |
checks if the string starts with the given prefix (public member function of std::basic_string<CharT,Traits,Allocator> ) |
(C++20) |
checks if the string ends with the given suffix (public member function of std::basic_string<CharT,Traits,Allocator> ) |
compares two views (public member function) |