(0989400a925cd201defdca9eb28eb87200b30785)
Defines RBIMPL_ASSUME / RBIMPL_UNREACHABLE. More...
#include "ruby/internal/config.h"#include "ruby/internal/cast.h"#include "ruby/internal/compiler_since.h"#include "ruby/internal/has/builtin.h"#include "ruby/internal/warning_push.h"
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Macros | |
| #define | RBIMPL_UNREACHABLE_RETURN(_) __builtin_unreachable() |
Wraps (or simulates) __builtin_unreachable. More... | |
| #define | RBIMPL_UNREACHABLE __builtin_unreachable |
Wraps (or simulates) __builtin_unreachable. More... | |
| #define | RBIMPL_ASSUME __builtin_assume |
Wraps (or simulates) __assume. More... | |
Detailed Description
Defines RBIMPL_ASSUME / RBIMPL_UNREACHABLE.
- 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
RBIMPLorrbimplare 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.
These macros must be defined at once because:
- RBIMPL_ASSUME could fallback to RBIMPL_UNREACHABLE.
- RBIMPL_UNREACHABLE could fallback to RBIMPL_ASSUME.
Definition in file assume.h.
Macro Definition Documentation
◆ RBIMPL_ASSUME
| #define RBIMPL_ASSUME __builtin_assume |
◆ RBIMPL_UNREACHABLE
| #define RBIMPL_UNREACHABLE __builtin_unreachable |
