Abseil Common Libraries (C++) (grcp 依赖)
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41 lines
1.4 KiB
41 lines
1.4 KiB
6 years ago
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// Copyright 2019 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef ABSL_FLAGS_USAGE_H_
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#define ABSL_FLAGS_USAGE_H_
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#include "absl/strings/string_view.h"
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// --------------------------------------------------------------------
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// Usage reporting interfaces
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namespace absl {
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// Sets the "usage" message to be used by help reporting routines.
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// For example:
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// absl::SetProgramUsageMessage(
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// absl::StrCat("This program does nothing. Sample usage:\n", argv[0],
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// " <uselessarg1> <uselessarg2>"));
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// Do not include commandline flags in the usage: we do that for you!
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// Note: Calling SetProgramUsageMessage twice will trigger a call to std::exit.
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void SetProgramUsageMessage(absl::string_view new_usage_message);
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// Returns the usage message set by SetProgramUsageMessage().
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absl::string_view ProgramUsageMessage();
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} // namespace absl
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#endif // ABSL_FLAGS_USAGE_H_
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