std::basic_string_view<CharT,Traits>::starts_with (3) - Linux Manuals

std::basic_string_view<CharT,Traits>::starts_with: std::basic_string_view<CharT,Traits>::starts_with

NAME

std::basic_string_view<CharT,Traits>::starts_with - std::basic_string_view<CharT,Traits>::starts_with

Synopsis


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


ends_with checks if the string view ends with the given suffix
            (public member function)
(C++20)


starts_with checks if the string starts with the given prefix
            (public member function of std::basic_string<CharT,Traits,Allocator>)
(C++20)


ends_with checks if the string ends with the given suffix
            (public member function of std::basic_string<CharT,Traits,Allocator>)
(C++20)
            compares two views
compare (public member function)

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