Standard library header <cwctype>

 

C++

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Technical Specifications

 

Standard Library header files

Language Support
<cstddef> <limits> <climits> <cfloat> <cstdint> <new> <typeinfo> <exception> <ciso646>	<initializer_list> <csignal> <csetjmp> <cstdalign> <cstdarg> <cstdbool> <cstdlib> <ctime>
Diagnostics
<stdexcept> <cassert>	<cerrno> <system_error>
General utilities
<utility> <tuple> <bitset> <memory> <cstdlib> <cstring> <functional>	<type_traits> <ratio> <chrono> <ctime> <scoped_allocator> <typeindex>
Strings
<string> <cctype> <cwctype> <cstring>	<cwchar> <cstdlib> <cuchar>
Localization
<locale> <codecvt> <clocale>

Containers
<array> <deque> <forward_list> <list> <vector>	<map> <set> <unordered_map> <unordered_set> <queue> <stack>
Iterators
<iterator>
Algorithms
<algorithm>	<cstdlib>
Numerics
<cfenv> <complex> <random> <valarray>	<numeric> <cmath> <ctgmath> <cstdlib>
Input/Output
<iosfwd> <iostream> <ios> <streambuf> <istream> <ostream>	<iomanip> <sstream> <fstream> <cstdio> <cinttypes>
Regular expressions
<regex>
Thread support
<thread> <mutex> <atomic>	<shared_mutex> <condition_variable> <future>

 

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)