| Name | Description | Notes | Source | Availability | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
__STDC_ |
Indicator of equivalence of
char16_t and UTF-16 |
L | ? | M | Predefined | C11 | |||||
ATOMIC_ |
Lock-free property of type atomic_ |
? | M | <stdatomic.h> |
C11 | ||||||
atomic_ |
Atomic character type | ? | T | <stdatomic.h> |
C11 | ||||||
char16_t |
Potential 16-bit Unicode-character type | ? | T | <uchar.h> |
C11 | ||||||
char16_t is an unsigned integer type of at least 16 bits, the
same type that uint_ is an alias of,
so it has the range 0 to UINT_, which
is at least 65535. It is intended to
hold characters
encoded in UTF-16. However, this is only guaranteed if
__STDC_ is predefined (which
expands to 1 if it is).
The functions mbrtoc16 and
c16rtomb can be used
to convert between sequences of
char16_t and char. Character constants of type
char16_t take the form u'x'. String
literals of type
char16_t[] take the form u"abc".
atomic_
is an alias for _Atomic
char16_t. This type is lock-free always if
ATOMIC_ is
2, sometimes if 1, and never if 0.
