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