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This header provides support for 16-bit and 32-bit characters, suitable to be encoded using UTF-16 and UTF-32.
In C++, char16_t and char32_t are fundamental types (and thus this header does not define such macros in C++).
Reference
C library:
- <cassert> (assert.h)
- <cctype> (ctype.h)
- <cerrno> (errno.h)
-
<cfenv> (fenv.h)C++11
- <cfloat> (float.h)
-
<cinttypes> (inttypes.h)C++11
- <ciso646> (iso646.h)
- <climits> (limits.h)
- <clocale> (locale.h)
- <cmath> (math.h)
- <csetjmp> (setjmp.h)
- <csignal> (signal.h)
- <cstdarg> (stdarg.h)
-
<cstdbool> (stdbool.h)C++11
- <cstddef> (stddef.h)
-
<cstdint> (stdint.h)C++11
- <cstdio> (stdio.h)
- <cstdlib> (stdlib.h)
- <cstring> (string.h)
-
<ctgmath> (tgmath.h)C++11
- <ctime> (time.h)
-
<cuchar> (uchar.h)C++11
- <cwchar> (wchar.h)
- <cwctype> (wctype.h)
Containers:
-
<array>C++11
- <deque>
-
<forward_list>C++11
- <list>
- <map>
- <queue>
- <set>
- <stack>
-
<unordered_map>C++11
-
<unordered_set>C++11
- <vector>
-
Input/Output:
Multi-threading:
-
<atomic>C++11
-
<condition_variable>C++11
-
<future>C++11
-
<mutex>C++11
-
<thread>C++11
-
Other:
- <algorithm>
- <bitset>
-
<chrono>C++11
-
<codecvt>C++11
- <complex>
- <exception>
- <functional>
-
<initializer_list>C++11
- <iterator>
- <limits>
- <locale>
- <memory>
- <new>
- <numeric>
-
<random>C++11
-
<ratio>C++11
-
<regex>C++11
- <stdexcept>
- <string>
-
<system_error>C++11
-
<tuple>C++11
-
<type_traits>C++11
-
<typeindex>C++11
- <typeinfo>
- <utility>
- <valarray>
- Reference
- <cuchar>
header
<cuchar> (uchar.h)
Unicode characters
Types
In C, this header defines two macros: char16_t and char32_t, which map to unsigned integral types of the appropriate size (the same as uint_least16_t and uint_least32_t, respectively).In C++, char16_t and char32_t are fundamental types (and thus this header does not define such macros in C++).
Macros
In C++, the following macros are defined by this header:| Macro | description |
|---|---|
| __STD_UTF_16__ | If defined, values of type char16_t have UTF-16 encoding. Otherwise, the encoding of char16_t is unspecified. (In C11, the macro expands to 1 when defined) |
| __STD_UTF_32__ | If defined, values of type char32_t have UTF-32 encoding. Otherwise, the encoding of char32_t is unspecified. (In C11, the macro expands to 1 when defined) |
Functions
- c16rtomb
- Convert 16-bit character to multibyte sequence (function)
- c32rtomb
- Convert 32-bit character to multibyte sequence (function)
- mbrtoc16
- Convert multibyte sequence to 16-bit character (function)
- mbrtoc32
- Convert multibyte sequence to 32-bit character (function)
Compatibility
This header, first introduced in C by a Technical Report extending C99, is fully supported by the latest standards of C and C++ (both published in 2011).
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Spotted an error? contact us