| 1 | // Copyright 2013 The Flutter Authors. All rights reserved. |
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| 2 | // Use of this source code is governed by a BSD-style license that can be |
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| 3 | // found in the LICENSE file. |
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| 4 | |
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| 5 | #ifndef FLUTTER_FML_COMPILER_SPECIFIC_H_ |
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| 6 | #define FLUTTER_FML_COMPILER_SPECIFIC_H_ |
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| 7 | |
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| 8 | #if !defined(__GNUC__) && !defined(__clang__) && !defined(_MSC_VER) |
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| 9 | #error Unsupported compiler. |
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| 10 | #endif |
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| 11 | |
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| 12 | // Annotate a variable indicating it's ok if the variable is not used. |
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| 13 | // (Typically used to silence a compiler warning when the assignment |
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| 14 | // is important for some other reason.) |
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| 15 | // Use like: |
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| 16 | // int x = ...; |
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| 17 | // FML_ALLOW_UNUSED_LOCAL(x); |
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| 18 | #define FML_ALLOW_UNUSED_LOCAL(x) false ? (void)x : (void)0 |
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| 19 | |
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| 20 | // Annotate a typedef or function indicating it's ok if it's not used. |
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| 21 | // Use like: |
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| 22 | // typedef Foo Bar ALLOW_UNUSED_TYPE; |
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| 23 | #if defined(__GNUC__) || defined(__clang__) |
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| 24 | #define FML_ALLOW_UNUSED_TYPE __attribute__((unused)) |
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| 25 | #else |
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| 26 | #define FML_ALLOW_UNUSED_TYPE |
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| 27 | #endif |
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| 28 | |
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| 29 | #endif // FLUTTER_FML_COMPILER_SPECIFIC_H_ |
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| 30 | |
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