constexpr bool contains( basic_string_view sv ) const noexcept;
(1) (since C++23)constexpr bool contains( CharT c ) const noexcept;
(2) (since C++23)constexpr bool contains( const CharT* s ) const;
(3) (since C++23)Checks if the string view contains the given substring, where
1) the substring is a string view.
2) the substring is a single character.
3) the substring is a null-terminated character string.
All three overloads are equivalent to return find(x) != npos;, where x is the parameter.
true if the string view contains the provided substring, false otherwise.
[edit] Notes [edit] Example#include <string_view>
using namespace std::literals;
static_assert
(
// bool contains(basic_string_view x) const noexcept;
"https://cppreference.com"sv.contains("cpp"sv) == true and
"https://cppreference.com"sv.contains("php"sv) == false and
// bool contains(CharT x) const noexcept;
"C++23"sv.contains('+') == true and
"C++23"sv.contains('-') == false and
// bool contains(const CharT* x) const;
std::string_view("basic_string_view").contains("string") == true and
std::string_view("basic_string_view").contains("String") == false
);
int main() {}[edit] See also checks if the string view starts with the given prefix
std::basic_string<CharT,Traits,Allocator>) [edit]
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4