Standard library header <cwctype>

 

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Standard library headers

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

 

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 wide 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)