usage.h - mozsearch

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//

//  Copyright 2019 The Abseil Authors.

//

// 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

//

//      https://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.

#ifndef ABSL_FLAGS_USAGE_H_

#define ABSL_FLAGS_USAGE_H_

#include "absl/base/config.h"

#include "absl/strings/string_view.h"

// --------------------------------------------------------------------

// Usage reporting interfaces

namespace absl {

ABSL_NAMESPACE_BEGIN

// Sets the "usage" message to be used by help reporting routines.

// For example:

//  absl::SetProgramUsageMessage(

//      absl::StrCat("This program does nothing.  Sample usage:\n", argv[0],

//                   " <uselessarg1> <uselessarg2>"));

// Do not include commandline flags in the usage: we do that for you!

// Note: Calling SetProgramUsageMessage twice will trigger a call to std::exit.

void SetProgramUsageMessage(absl::string_view new_usage_message);

// Returns the usage message set by SetProgramUsageMessage().

absl::string_view ProgramUsageMessage();

ABSL_NAMESPACE_END

}  // namespace absl

#endif  // ABSL_FLAGS_USAGE_H_