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std::wcsspn(3) C++ Standard Libary std::wcsspn(3) NAME std::wcsspn - std::wcsspn Synopsis Defined in header <cwchar> size_t wcsspn( const wchar_t* dest, const wchar_t* src ); Returns the length of the maximum initial segment of the wide string pointed to by dest, that consists of only the characters found in wide string pointed to by src. Parameters dest - pointer to the null-terminated wide string to be analyzed src - pointer to the null-terminated wide string that contains the characters to search for Return value The length of the maximum initial segment that contains only charac- ters from wide string pointed to by src Example // Run this code #include <cwchar> #include <iostream> #include <locale> int main() { wchar_t dest[] = L" "; const wchar_t src[] = L" "; const std::size_t len = std::wcsspn(dest, src); dest[len] = L'\0'; // terminates the segment to print it out std::wcout.imbue(std::locale("en_US.utf8")); std::wcout << L"The length of maximum initial segment is " << len << L".\n"; std::wcout << L"The segment is \"" << dest << L"\".\n"; } Possible output: The length of maximum initial segment is 6. The segment is " ". See also returns the length of the maximum initial segment that con- sists wcscspn of only the wide not found in another wide string (function) finds the first location of any wide character in one wide string, in wcspbrk another wide string (function) http://cppreference.com 2022.07.31 std::wcsspn(3)
NAME | Synopsis | Parameters | Return value | Example | Possible output: | See also
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