Standard library header <cwchar>

namespace std {
 using size_t = /* see description */; // freestanding
 using mbstate_t = /* see description */; // freestanding
 using wint_t = /* see description */; // freestanding
 
 struct tm;
 
 int fwprintf(FILE* stream, const wchar_t* format, ...);
 int fwscanf(FILE* stream, const wchar_t* format, ...);
 int swprintf(wchar_t* s, size_t n, const wchar_t* format, ...);
 int swscanf(const wchar_t* s, const wchar_t* format, ...);
 int vfwprintf(FILE* stream, const wchar_t* format, va_list arg);
 int vfwscanf(FILE* stream, const wchar_t* format, va_list arg);
 int vswprintf(wchar_t* s, size_t n, const wchar_t* format, va_list arg);
 int vswscanf(const wchar_t* s, const wchar_t* format, va_list arg);
 int vwprintf(const wchar_t* format, va_list arg);
 int vwscanf(const wchar_t* format, va_list arg);
 int wprintf(const wchar_t* format, ...);
 int wscanf(const wchar_t* format, ...);
 wint_t fgetwc(FILE* stream);
 wchar_t* fgetws(wchar_t* s, int n, FILE* stream);
 wint_t fputwc(wchar_t c, FILE* stream);
 int fputws(const wchar_t* s, FILE* stream);
 int fwide(FILE* stream, int mode);
 wint_t getwc(FILE* stream);
 wint_t getwchar();
 wint_t putwc(wchar_t c, FILE* stream);
 wint_t putwchar(wchar_t c);
 wint_t ungetwc(wint_t c, FILE* stream);
 double wcstod(const wchar_t* nptr, wchar_t** endptr);
 float wcstof(const wchar_t* nptr, wchar_t** endptr);
 long double wcstold(const wchar_t* nptr, wchar_t** endptr);
 long int wcstol(const wchar_t* nptr, wchar_t** endptr, int base);
 long long int wcstoll(const wchar_t* nptr, wchar_t** endptr, int base);
 unsigned long int wcstoul(const wchar_t* nptr, wchar_t** endptr, int base);
 unsigned long long int wcstoull(const wchar_t* nptr, wchar_t** endptr, int base);
 wchar_t* wcscpy(wchar_t* s1, const wchar_t* s2); // freestanding
 wchar_t* wcsncpy(wchar_t* s1, const wchar_t* s2, size_t n); // freestanding
 wchar_t* wmemcpy(wchar_t* s1, const wchar_t* s2, size_t n); // freestanding
 wchar_t* wmemmove(wchar_t* s1, const wchar_t* s2, size_t n); // freestanding
 wchar_t* wcscat(wchar_t* s1, const wchar_t* s2); // freestanding
 wchar_t* wcsncat(wchar_t* s1, const wchar_t* s2, size_t n); // freestanding
 int wcscmp(const wchar_t* s1, const wchar_t* s2); // freestanding
 int wcscoll(const wchar_t* s1, const wchar_t* s2);
 int wcsncmp(const wchar_t* s1, const wchar_t* s2, size_t n); // freestanding
 size_t wcsxfrm(wchar_t* s1, const wchar_t* s2, size_t n);
 int wmemcmp(const wchar_t* s1, const wchar_t* s2, size_t n); // freestanding
 const wchar_t* wcschr(const wchar_t* s, wchar_t c); // freestanding
 wchar_t* wcschr(wchar_t* s, wchar_t c); // freestanding
 size_t wcscspn(const wchar_t* s1, const wchar_t* s2); // freestanding
 const wchar_t* wcspbrk(const wchar_t* s1, const wchar_t* s2); // freestanding
 wchar_t* wcspbrk(wchar_t* s1, const wchar_t* s2); // freestanding
 const wchar_t* wcsrchr(const wchar_t* s, wchar_t c); // freestanding
 wchar_t* wcsrchr(wchar_t* s, wchar_t c); // freestanding
 size_t wcsspn(const wchar_t* s1, const wchar_t* s2); // freestanding
 const wchar_t* wcsstr(const wchar_t* s1, const wchar_t* s2); // freestanding
 wchar_t* wcsstr(wchar_t* s1, const wchar_t* s2); // freestanding
 wchar_t* wcstok(wchar_t* s1, const wchar_t* s2, wchar_t** ptr); // freestanding
 const wchar_t* wmemchr(const wchar_t* s, wchar_t c, size_t n); // freestanding
 wchar_t* wmemchr(wchar_t* s, wchar_t c, size_t n); // freestanding
 size_t wcslen(const wchar_t* s); // freestanding
 wchar_t* wmemset(wchar_t* s, wchar_t c, size_t n); // freestanding
 size_t wcsftime(wchar_t* s, size_t maxsize, const wchar_t* format, const tm* timeptr);
 wint_t btowc(int c);
 int wctob(wint_t c);
 
 // multibyte / wide string and character conversion functions
 int mbsinit(const mbstate_t* ps);
 size_t mbrlen(const char* s, size_t n, mbstate_t* ps);
 size_t mbrtowc(wchar_t* pwc, const char* s, size_t n, mbstate_t* ps);
 size_t wcrtomb(char* s, wchar_t wc, mbstate_t* ps);
 size_t mbsrtowcs(wchar_t* dst, const char** src, size_t len, mbstate_t* ps);
 size_t wcsrtombs(char* dst, const wchar_t** src, size_t len, mbstate_t* ps);
}
 
#define NULL /* see description */ // freestanding
#define WCHAR_MAX /* see description */ // freestanding
#define WCHAR_MIN /* see description */ // freestanding
#define WEOF /* see description */ // freestanding