Ruby: include/ruby/internal/attr/const.h File Reference

Ruby 3.4.8p72 (2025-12-17 revision 995b59f66677d44767ce9faac6957e5543617ff9)

Macros
const.h File Reference

Defines RBIMPL_ATTR_CONST. More...

`#include "ruby/internal/compiler_since.h"`
`#include "ruby/internal/has/attribute.h"`
`#include "ruby/internal/has/declspec_attribute.h"`
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## Macros
#define | RBIMPL_ATTR_CONST() /* void */
| Wraps (or simulates) `__attribute__((const))`
#define | RBIMPL_ATTR_CONST_UNLESS_DEBUG() RBIMPL_ATTR_CONST()
| Enables RBIMPL_ATTR_CONST if and only if.

## Detailed Description

Defines RBIMPL_ATTR_CONST.

Author
  Ruby developers ruby-.nosp@m.core.nosp@m.@ruby.nosp@m.-lan.nosp@m.g.org

Copyright
  This file is a part of the programming language Ruby. Permission is hereby granted, to either redistribute and/or modify this file, provided that the conditions mentioned in the file COPYING are met. Consult the file for details.

Warning
  Symbols prefixed with either `RBIMPL` or `rbimpl` are implementation details. Don't take them as canon. They could rapidly appear then vanish. The name (path) of this header file is also an implementation detail. Do not expect it to persist at the place it is now. Developers are free to move it anywhere anytime at will.

Note
  To ruby-core: remember that this header can be possibly recursively included from extension libraries written in C++. Do not expect for instance `__VA_ARGS__` is always available. We assume C99 for ruby itself but we don't assume languages of extension libraries. They could be written in C++98.

Definition in file const.h.

## Macro Definition Documentation

## ◆ RBIMPL_ATTR_CONST

#define RBIMPL_ATTR_CONST | ( |  | ) | /* void */

Wraps (or simulates) `__attribute__((const))`

Definition at line 36 of file const.h.

## ◆ RBIMPL_ATTR_CONST_UNLESS_DEBUG

#define RBIMPL_ATTR_CONST_UNLESS_DEBUG | ( |  | ) | RBIMPL_ATTR_CONST()

Enables RBIMPL_ATTR_CONST if and only if.

! RUBY_DEBUG.

Definition at line 41 of file const.h.