57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
/* Run-time assert-like macros.
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Copyright (C) 2014-2022 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Paul Eggert. */
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#ifndef _GL_ASSURE_H
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#define _GL_ASSURE_H
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#include <assert.h>
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#include "verify.h"
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/* Evaluate an assertion E that is guaranteed to be true.
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If NDEBUG is not defined, abort the program if E is false.
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If NDEBUG is defined, the compiler can assume E and behavior is
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undefined if E is false, fails to evaluate, or has side effects.
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Unlike standard 'assert', this macro evaluates E even when NDEBUG
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is defined, so as to catch typos, avoid some GCC warnings, and
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improve performance when E is simple enough.
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Also see the documentation for 'assume' in verify.h. */
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#ifdef NDEBUG
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# define affirm(E) assume (E)
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#else
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# define affirm(E) assert (E)
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#endif
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/* Check E's value at runtime, and report an error and abort if not.
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However, do nothing if NDEBUG is defined.
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Unlike standard 'assert', this macro compiles E even when NDEBUG
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is defined, so as to catch typos and avoid some GCC warnings.
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Unlike 'affirm', it is OK for E to use hard-to-optimize features,
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since E is not executed if NDEBUG is defined. */
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#ifdef NDEBUG
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# define assure(E) ((void) (0 && (E)))
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#else
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# define assure(E) assert (E)
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#endif
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#endif
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