std::wcstok

std::wcstok

Finds the next token in a null-terminated wide string pointed to by str. The separator characters are identified by null-terminated wide string pointed to by delim.

This function is designed to be called multiples times to obtain successive tokens from the same string.

• If str != NULL, the call is treated as the first call to std::wcstok for this particular wide string. The function searches for the first wide character which is not contained in delim.

Parameters

Return value

Pointer to the beginning of the next token or null pointer if there are no more tokens.

Note

This function is destructive: it writes the L'\0' characters in the elements of the string str. In particular, a wide string literal cannot be used as the first argument of std::wcstok.

Unlike std::strtok, this function does not update static storage: it stores the parser state in the user-provided location.

Unlike most other tokenizers, the delimiters in std::wcstok can be different for each subsequent token, and can even depend on the contents of the previous tokens.

Example

​

#include <cwchar>
#include <iostream>
 
int main()
{
    wchar_t input[100] = L"A bird came down the walk";
    wchar_t* buffer;
    wchar_t* token = std::wcstok(input, L" ", &buffer
    while (token) {
        std::wcout << token << '\n';
        token = std::wcstok(nullptr, L" ", &buffer
    }
}

​

Output:

​

A
bird
came
down
the
walk

​

See also

| C documentation for wcstok |

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http://en.cppreference.com/w/cpp/string/wide/wcstok