Standard library header <cwchar>

 

C++

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Standard library headers

Named requirements

Feature test macros (C++20)

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Concepts library (C++20)

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Diagnostics library

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Containers library

Iterators library

Ranges library (C++20)

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Input/output library

Filesystem library (C++17)

Regular expressions library (C++11)

Concurrency support library (C++11)

Execution support library (C++26)

Technical specifications

Symbols index

External libraries

 

Standard library headers

Language support <cfloat> <climits> <compare> (C++20) <coroutine> (C++20) <csetjmp> <csignal> <cstdarg> <cstddef> <cstdint> (C++11) <cstdlib> <exception> <initializer_list> (C++11)    <limits> <new> <source_location> (C++20) <stdfloat> (C++23) <typeinfo> <version> (C++20) Concepts <concepts> (C++20) Diagnostics <cassert> <cerrno> <debugging> (C++26) <stacktrace> (C++23) <stdexcept> <system_error> (C++11) Memory management <memory> <memory_resource> (C++17) <scoped_allocator> (C++11) Metaprogramming <type_traits> (C++11) <ratio> (C++11)

General utilities <any> (C++17) <bitset> <bit> (C++20) <charconv> (C++17) <expected> (C++23) <format> (C++20) <functional> <optional> (C++17) <tuple> (C++11) <typeindex> (C++11) <utility> <variant> (C++17) Containers <array> (C++11) <deque> <flat_map> (C++23) <flat_set> (C++23) <forward_list> (C++11) <inplace_vector> (C++26)    <list> <map> <mdspan> (C++23) <queue> <set> <span> (C++20) <stack> <unordered_map> (C++11) <unordered_set> (C++11) <vector> Iterators <iterator> Ranges <generator> (C++23) <ranges> (C++20)

Algorithms <algorithm> <numeric> Strings <cctype> <cstring> <cuchar> (C++11) <cwchar> <cwctype> <string_view> (C++17) <string> Text processing <clocale> <codecvt> (C++11/17/26*) <locale> <regex> (C++11) <text_encoding> (C++26)    Numerics <cfenv> (C++11) <cmath> <complex> <linalg> (C++26) <numbers> (C++20) <random> (C++11) <valarray> Time <chrono> (C++11) <ctime> C compatibility <ccomplex> (C++11/17/20*) <ciso646> (until C++20) <cstdalign> (C++11/17/20*) <cstdbool> (C++11/17/20*) <ctgmath> (C++11/17/20*)

Input/output <cinttypes> (C++11) <cstdio> <filesystem> (C++17) <fstream> <iomanip> <iosfwd> <iostream> <ios> <istream> <ostream> <print> (C++23) <spanstream> (C++23) <sstream> <streambuf> <strstream> (C++98/26*) <syncstream> (C++20) Concurrency support <atomic> (C++11) <barrier> (C++20) <condition_variable> (C++11) <future> (C++11) <hazard_pointer> (C++26) <latch> (C++20) <mutex> (C++11) <rcu> (C++26) <semaphore> (C++20) <shared_mutex> (C++14) <stdatomic.h> (C++23) <stop_token> (C++20) <thread> (C++11) Execution support <execution> (C++17)

 

This header is part of the null-terminated wide and multibyte strings libraries. It also provides some C-style I/O functions and conversion fom C-style Date.

Macros

NULL	implementation-defined null pointer constant (macro constant)
WEOF	a non-character value of type wint_t used to indicate errors (macro constant)
WCHAR_MIN	the smallest valid value of wchar_t (macro constant)
WCHAR_MAX	the largest valid value of wchar_t (macro constant)

Types

Template:cpp/string/multibyte/dcl list mbstate tTemplate:cpp/chrono/c/dcl list tm

size_t	unsigned integer type returned by the sizeof operator (typedef)
wint_t	integer type that can hold any valid wide character and at least one more value

Functions

Template:cpp/string/wide/dcl list wcscpyTemplate:cpp/string/wide/dcl list wcsncpyTemplate:cpp/string/wide/dcl list wcscatTemplate:cpp/string/wide/dcl list wcsncatTemplate:cpp/string/wide/dcl list wcsxfrmTemplate:cpp/string/wide/dcl list wcslenTemplate:cpp/string/wide/dcl list wcscmpTemplate:cpp/string/wide/dcl list wcsncmpTemplate:cpp/string/wide/dcl list wcscollTemplate:cpp/string/wide/dcl list wcschrTemplate:cpp/string/wide/dcl list wcsrchrTemplate:cpp/string/wide/dcl list wcsspnTemplate:cpp/string/wide/dcl list wcscspnTemplate:cpp/string/wide/dcl list wcspbrkTemplate:cpp/string/wide/dcl list wcsstrTemplate:cpp/string/wide/dcl list wcstokTemplate:cpp/string/wide/dcl list wmemcpyTemplate:cpp/string/wide/dcl list wmemmoveTemplate:cpp/string/wide/dcl list wmemcmpTemplate:cpp/string/wide/dcl list wmemchrTemplate:cpp/string/wide/dcl list wmemsetTemplate:cpp/string/multibyte/dcl list mbsinitTemplate:cpp/string/multibyte/dcl list btowcTemplate:cpp/string/multibyte/dcl list wctobTemplate:cpp/string/multibyte/dcl list mbrlenTemplate:cpp/string/multibyte/dcl list mbrtowcTemplate:cpp/string/multibyte/dcl list wcrtombTemplate:cpp/string/multibyte/dcl list mbsrtowcsTemplate:cpp/string/multibyte/dcl list wcsrtombsTemplate:cpp/io/c/dcl list fgetwcTemplate:cpp/io/c/dcl list fgetwsTemplate:cpp/io/c/dcl list fputwcTemplate:cpp/io/c/dcl list fputwsTemplate:cpp/io/c/dcl list getwcharTemplate:cpp/io/c/dcl list putwcharTemplate:cpp/io/c/dcl list ungetwcTemplate:cpp/io/c/dcl list fwideTemplate:cpp/io/c/dcl list fwscanfTemplate:cpp/io/c/dcl list vfwscanfTemplate:cpp/io/c/dcl list fwprintfTemplate:cpp/io/c/dcl list vfwprintfTemplate:cpp/chrono/c/dcl list wcsftimeTemplate:cpp/string/wide/dcl list wcstolTemplate:cpp/string/wide/dcl list wcstoulTemplate:cpp/string/wide/dcl list wcstof

String manipulation

String examination

Wide character array manipulation

Multibyte/wide character conversion

Input/Output

String conversions

Notes

• NULL is also defined in the following headers:
  • <cstddef>
  • <cstring>
  • <ctime>
  • <clocale>
  • <cstdio>
• std::size_t is also defined in the following headers:
  • <cstddef>
  • <ctime>
  • <cstdio>
• std::wint_t is also defined in the following headers:
  • <cwctype>
• std::tm is also defined in the following headers:
  • <ctime>