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30 lines
992 B
C
30 lines
992 B
C
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef ACCESSIBILITY_BASE_COMPILER_SPECIFIC_H_
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#define ACCESSIBILITY_BASE_COMPILER_SPECIFIC_H_
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#if !defined(__GNUC__) && !defined(__clang__) && !defined(_MSC_VER)
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#error Unsupported compiler.
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#endif
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// Annotate a variable indicating it's ok if the variable is not used.
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// (Typically used to silence a compiler warning when the assignment
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// is important for some other reason.)
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// Use like:
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// int x = ...;
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// BASE_ALLOW_UNUSED_LOCAL(x);
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#define BASE_ALLOW_UNUSED_LOCAL(x) false ? (void)x : (void)0
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// Annotate a typedef or function indicating it's ok if it's not used.
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// Use like:
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// typedef Foo Bar ALLOW_UNUSED_TYPE;
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#if defined(__GNUC__) || defined(__clang__)
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#define BASE_ALLOW_UNUSED_TYPE __attribute__((unused))
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#else
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#define BASE_ALLOW_UNUSED_TYPE
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#endif
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#endif // ACCESSIBILITY_BASE_COMPILER_SPECIFIC_H_
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