29 lines
1.0 KiB
C
29 lines
1.0 KiB
C
#ifndef INTERNAL_STATIC_ASSERT_H /* -*- C -*- */
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#define INTERNAL_STATIC_ASSERT_H
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/**
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* @file
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* @brief C11 shim for _Static_assert.
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* @author \@shyouhei
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* @copyright This file is a part of the programming language Ruby.
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* Permission is hereby granted, to either redistribute and/or
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* modify this file, provided that the conditions mentioned in the
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* file COPYING are met. Consult the file for details.
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*/
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#include <assert.h> /* for static_assert */
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#include "compilers.h" /* for __has_extension */
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#if defined(static_assert)
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/* Take assert.h definition */
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# define STATIC_ASSERT(name, expr) static_assert(expr, # name ": " # expr)
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#elif __has_extension(c_static_assert) || GCC_VERSION_SINCE(4, 6, 0)
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# define STATIC_ASSERT(name, expr) \
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__extension__ _Static_assert(expr, # name ": " # expr)
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#else
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# define STATIC_ASSERT(name, expr) \
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typedef int static_assert_ ## name ## _check[1 - 2 * !(expr)]
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#endif /* static_assert */
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#endif /* INTERNAL_STATIC_ASSERT_H */
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