Ruby 3.4.1p0 (2024-12-25 revision 48d4efcb85000e1ebae42004e963b5d0cedddcf2)
cpp_attribute.h File Reference

Defines RBIMPL_HAS_CPP_ATTRIBUTE. More...

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Macros

#define RBIMPL_HAS_CPP_ATTRIBUTE(_)
 Wraps (or simulates) __has_cpp_attribute.
 

Detailed Description

Defines RBIMPL_HAS_CPP_ATTRIBUTE.

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

Macro Definition Documentation

◆ RBIMPL_HAS_CPP_ATTRIBUTE

#define RBIMPL_HAS_CPP_ATTRIBUTE ( _)
Value:
((RBIMPL_HAS_CPP_ATTRIBUTE0(_) <= __cplusplus) ? RBIMPL_HAS_CPP_ATTRIBUTE0(_) : 0)
#define _(args)
This was a transition path from K&R to ANSI.
Definition stdarg.h:35

Wraps (or simulates) __has_cpp_attribute.

Definition at line 82 of file cpp_attribute.h.