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<iso646.h> Header - C
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C Standard Library

<assert.h>(C89) <complex.h>(C99)op <ctype.h>(C89) <errno.h>(C89) <fenv.h>(C99) <float.h>(C89) <inttypes.h>(C99) <iso646.h>(NA1) <limits.h>(C89) <locale.h>(C89) <math.h>(C89) <setjmp.h>(C89) <signal.h>(C89) <stdalign.h>(C11) <stdarg.h>(C89) <stdatomic.h>(C11)op <stdbool.h>(C99) <stddef.h>(C89) <stdint.h>(C99) <stdio.h>(C89) <stdlib.h>(C89) <stdnoreturn.h>(C11) <string.h>(C89) <tgmath.h>(C99) <threads.h>(C11)op <time.h>(C89) <uchar.h>(C11) <wchar.h>(NA1) <wctype.h>(NA1)

op - Optional Header v · d · e

The <iso646.h> header is part of the standard library of the C programming language which provides a set of object-like macros as an alternative spelling for C operators that contain &, |, ~, !, and ^. This header was added in Normative Addendum 1 in order to provide support for international character sets that might not have these symbols. This header provides eleven such macros.


Macros

The header provides the following macro definitions:

Macro Name Description Since
and Expands to && NA1
and_eq Expands to &= NA1
bitand Expands to & NA1
bitor Expands to | NA1
compl Expands to ~ NA1
not Expands to ! NA1
not_eq Expands to != NA1
or Expands to || NA1
xor Expands to ^ NA1
xor_eq Expands to ^= NA1
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