char32_t - cppreference.com (original) (raw)
char32_t is an unsigned integer type used for 32-bit wide characters and is the same type as uint_least32_t.
[edit] Notes
On any given platform, by the definition of uint_least32_t, the width of type char32_t can be greater than 32 bits, but the actual values stored in an object of type char32_t will always have a width of 32 bits.
[edit] Example
#include <stdio.h> #include <uchar.h> int main(void) { const char32_t wc[] = U"zß水🍌"; // or "z\u00df\u6c34\U0001f34c" const size_t wc_sz = sizeof wc / sizeof *wc; printf("%zu UTF-32 code units: [ ", wc_sz); for (size_t n = 0; n < wc_sz; ++n) printf("%#x ", wc[n]); printf("]\n"); }
Possible output:
5 UTF-32 code units: [ 0x7a 0xdf 0x6c34 0x1f34c 0 ]
[edit] References
C17 standard (ISO/IEC 9899:2018):
7.28 Unicode utilities <uchar.h> (p: 292)
7.20.1.2 Minimum-width integer types (p: 212-213)
C11 standard (ISO/IEC 9899:2011):
7.28 Unicode utilities <uchar.h> (p: 398)
7.20.1.2 Minimum-width integer types (p: 290)
C99 standard (ISO/IEC 9899:1999):
7.18.1.2 Minimum-width integer types (p: 256)