diff options
Diffstat (limited to 'third_party/fuchsia/repo/sdk/lib/fit/include/lib/fit/internal/compiler.h')
| -rw-r--r-- | third_party/fuchsia/repo/sdk/lib/fit/include/lib/fit/internal/compiler.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/third_party/fuchsia/repo/sdk/lib/fit/include/lib/fit/internal/compiler.h b/third_party/fuchsia/repo/sdk/lib/fit/include/lib/fit/internal/compiler.h new file mode 100644 index 000000000..1bd806414 --- /dev/null +++ b/third_party/fuchsia/repo/sdk/lib/fit/include/lib/fit/internal/compiler.h @@ -0,0 +1,21 @@ +// Copyright 2020 The Fuchsia Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#ifndef LIB_FIT_INCLUDE_LIB_FIT_INTERNAL_COMPILER_H_ +#define LIB_FIT_INCLUDE_LIB_FIT_INTERNAL_COMPILER_H_ + +// Annotate a class or function with C++17's [[nodiscard]] or similar where supported by the +// compiler. +// +// C++14 doesn't support [[nodiscard]], but Clang allows __attribute__((warn_unused_result)) +// to be placed on class declarations. GCC only allows the attribute to be used on methods. +#if __cplusplus >= 201703L +#define LIB_FIT_NODISCARD [[nodiscard]] +#elif defined(__clang__) +#define LIB_FIT_NODISCARD __attribute__((__warn_unused_result__)) +#else +#define LIB_FIT_NODISCARD /* nothing */ +#endif + +#endif // LIB_FIT_INCLUDE_LIB_FIT_INTERNAL_COMPILER_H_ |