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Diffstat (limited to 'include')
-rw-r--r-- | include/ftl/ignore.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/include/ftl/ignore.h b/include/ftl/ignore.h new file mode 100644 index 0000000000..1468fa2498 --- /dev/null +++ b/include/ftl/ignore.h @@ -0,0 +1,42 @@ +/* + * Copyright 2025 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#pragma once + +namespace android::ftl { + +// An alternative to `std::ignore` that makes it easy to ignore multiple values. +// +// Examples: +// +// void ftl_ignore_multiple(int arg1, const char* arg2, std::string arg3) { +// // When invoked, all the arguments are ignored. +// ftl::ignore(arg1, arg2, arg3); +// } +// +// void ftl_ignore_single(int arg) { +// // It can be used like std::ignore to ignore a single value +// ftl::ignore = arg; +// } +// +inline constexpr struct { + // NOLINTNEXTLINE(misc-unconventional-assign-operator, readability-named-parameter) + constexpr auto operator=(auto&&) const -> decltype(*this) { return *this; } + // NOLINTNEXTLINE(readability-named-parameter) + constexpr void operator()(auto&&...) const {} +} ignore; + +} // namespace android::ftl
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