Standard library header <cwctype>

 

C++

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Standard Library headers

Note: a slash '/' in a revision mark means that the header was deprecated and/or removed.

Language Support
<cstddef> <cstdlib> <version> (C++20) <limits> <climits>	<cfloat> <cstdint> (C++11) <new> <typeinfo>	<source_location> (C++20) <exception> <initializer_list> (C++11)   <compare> (C++20)	<coroutine> (C++20) <csignal> <csetjmp> <cstdarg>
Concepts
<concepts> (C++20)
Diagnostics
<stdexcept>	<cassert>	<cerrno>	<system_error> (C++11)
General utilities
<utility> <memory> <memory_resource> (C++17) <scoped_allocator> (C++11)   <expected> (C++23)	<bitset> <tuple> (C++11) <optional> (C++17) <any> (C++17)	<variant> (C++17) <type_traits> (C++11) <ratio> (C++11) <chrono> (C++11)	<typeindex> (C++11) <functional> <stacktrace> (C++23) <ctime>
Strings
<string> <string_view> (C++17) <cstring>	<charconv> (C++17) <format> (C++20)	<cctype> <cwctype>	<cwchar> <cuchar> (C++11)
Localization
<locale> <clocale>	<codecvt> (C++11/17)
Containers
<span> (C++20) <array> (C++11) <vector>	<deque> <forward_list> (C++11) <list>	<map> <set> <queue>	<unordered_map> (C++11) <unordered_set> (C++11) <stack>
Iterators
<iterator>
Ranges
<ranges> (C++20)
Algorithms
<algorithm>	<execution> (C++17)
Numerics
<complex> <random> (C++11)	<valarray> <numeric>	<bit> (C++20) <numbers> (C++20)	<cfenv> (C++11) <cmath>
Input/Output
<iosfwd> <ios> <iomanip> <streambuf>	<istream> <ostream> <iostream>	<syncstream> (C++20) <spanstream> (C++23) <sstream> <fstream>	<cstdio> <cinttypes> (C++11) <strstream> (C++98/)
Regular expressions
<regex> (C++11)
Filesystem support
<filesystem> (C++17)
Thread support
<thread> (C++11) <atomic> (C++11) <mutex> (C++11)	<shared_mutex> (C++14) <condition_variable> (C++11)   <future> (C++11)	<stop_token> (C++20) <semaphore> (C++20)	<latch> (C++20) <barrier> (C++20)
C compatibility
<cstdbool> (C++11/17/20) <ccomplex> (C++11/17/20)	<ctgmath> (C++11/17/20) <cstdalign> (C++11/17/20)	<ciso646> (until C++20) <stdatomic.h>

 

This header was originally in the C standard library as <wctype.h>.

This header is part of the C-style null-terminated wide strings library.

Types

wctrans_t	scalar type that holds locale-specific character mapping
wctype_t	scalar type that holds locale-specific character classification
wint_t	integer type that can hold any valid wide character and at least one more value

Macros

WEOF	a non-character value of type wint_t used to indicate errors (macro constant)

Functions

Character classification
iswalnum	checks if a wide character is alphanumeric (function)
iswalpha	checks if a wide character is alphabetic (function)
iswlower	checks if a wide character is lowercase (function)
iswupper	checks if a wide character is an uppercase character (function)
iswdigit	checks if a wide character is a digit (function)
iswxdigit	checks if a character is a hexadecimal character (function)
iswcntrl	checks if a wide character is a control character (function)
iswgraph	checks if a wide character is a graphical character (function)
iswspace	checks if a wide character is a space character (function)
iswblank (C++11)	checks if a wide character is a blank character (function)
iswprint	checks if a wide character is a printing character (function)
iswpunct	checks if a wide character is a punctuation character (function)
iswctype	classifies a wide character according to the specified LC_CTYPE category (function)
wctype	looks up a character classification category in the current C locale (function)
Character manipulation
towlower	converts a wide character to lowercase (function)
towupper	converts a wide character to uppercase (function)
towctrans	performs character mapping according to the specified LC_CTYPE mapping category (function)
wctrans	looks up a character mapping category in the current C locale (function)