# <iso646.h>

<head><title>&lt;iso646.h&gt;</title></head>

# `<iso646.h>`

[added with
[Amendment 1](https://docs.qualcomm.com/doc/80-N3040-23/topic/cpp_lib_over.html#Amendment%201)]

* * *

Include the standard header **`<iso646.h>`**
to provide readable alternatives to certain operators or punctuators.
The standard header `<iso646.h>` is available even in a
[freestanding implementation](https://docs.qualcomm.com/doc/80-N3040-23/topic/cpp_lib_over.html#freestanding%20implementation).

    #define and && [keyword in C++]
    #define and_eq &= [keyword in C++]
    #define bitand & [keyword in C++]
    #define bitor | [keyword in C++]
    #define compl ~ [keyword in C++]
    #define not ! [keyword in C++]
    #define not_eq != [keyword in C++]
    #define or || [keyword in C++]
    #define or_eq |= [keyword in C++]
    #define xor ^ [keyword in C++]
    #define xor_eq ^= [keyword in C++]Copy to clipboard

## `and`

    #define and && [keyword in C++]Copy to clipboard

The macro yields the operator `&&`.

## `and_eq`

    #define and_eq &= [keyword in C++]Copy to clipboard

The macro yields the operator `&=`.

## `bitand`

    #define bitand & [keyword in C++]Copy to clipboard

The macro yields the operator `&`.

## `bitor`

    #define bitor | [keyword in C++]Copy to clipboard

The macro yields the operator `|`.

## `compl`

    #define compl ~ [keyword in C++]Copy to clipboard

The macro yields the operator `~`.

## `not`

    #define not ! [keyword in C++]Copy to clipboard

The macro yields the operator `!`.

## `not_eq`

    #define not_eq != [keyword in C++]Copy to clipboard

The macro yields the operator `!=`.

## `or`

    #define or || [keyword in C++]Copy to clipboard

The macro yields the operator `||`.

## `or_eq`

    #define or_eq |= [keyword in C++]Copy to clipboard

The macro yields the operator `|=`.

## `xor`

    #define xor ^ [keyword in C++]Copy to clipboard

The macro yields the operator `^`.

## `xor_eq`

    #define xor_eq ^= [keyword in C++]Copy to clipboard

The macro yields the operator `^=`.

* * *

See also the
**[Table of Contents](https://docs.qualcomm.com/doc/80-N3040-23/topic/cpp_index.html#Table%20of%20Contents)** and the
**[Index](https://docs.qualcomm.com/doc/80-N3040-23/topic/_cpp_index.html)**.

*[Copyright](https://docs.qualcomm.com/doc/80-N3040-23/topic/cpp_crit_pjp.html) © 1992-2006by P.J. Plauger and Jim Brodie. All rights reserved.*

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Last Published: Oct 06, 2026

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