fc8dc48020
git-subtree-dir: third_party/abseil_cpp git-subtree-mainline:ffb2ae54begit-subtree-split:768eb2ca28
81 lines
3 KiB
C++
81 lines
3 KiB
C++
//
|
|
// 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_INTERNAL_USAGE_H_
|
|
#define ABSL_FLAGS_INTERNAL_USAGE_H_
|
|
|
|
#include <iosfwd>
|
|
#include <string>
|
|
|
|
#include "absl/base/config.h"
|
|
#include "absl/flags/declare.h"
|
|
#include "absl/flags/internal/commandlineflag.h"
|
|
#include "absl/strings/string_view.h"
|
|
|
|
// --------------------------------------------------------------------
|
|
// Usage reporting interfaces
|
|
|
|
namespace absl {
|
|
ABSL_NAMESPACE_BEGIN
|
|
namespace flags_internal {
|
|
|
|
// The format to report the help messages in.
|
|
enum class HelpFormat {
|
|
kHumanReadable,
|
|
};
|
|
|
|
// Outputs the help message describing specific flag.
|
|
void FlagHelp(std::ostream& out, const flags_internal::CommandLineFlag& flag,
|
|
HelpFormat format = HelpFormat::kHumanReadable);
|
|
|
|
// Produces the help messages for all flags matching the filter. A flag matches
|
|
// the filter if it is defined in a file with a filename which includes
|
|
// filter string as a substring. You can use '/' and '.' to restrict the
|
|
// matching to a specific file names. For example:
|
|
// FlagsHelp(out, "/path/to/file.");
|
|
// restricts help to only flags which resides in files named like:
|
|
// .../path/to/file.<ext>
|
|
// for any extension 'ext'. If the filter is empty this function produces help
|
|
// messages for all flags.
|
|
void FlagsHelp(std::ostream& out, absl::string_view filter,
|
|
HelpFormat format, absl::string_view program_usage_message);
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
// If any of the 'usage' related command line flags (listed on the bottom of
|
|
// this file) has been set this routine produces corresponding help message in
|
|
// the specified output stream and returns:
|
|
// 0 - if "version" or "only_check_flags" flags were set and handled.
|
|
// 1 - if some other 'usage' related flag was set and handled.
|
|
// -1 - if no usage flags were set on a commmand line.
|
|
// Non negative return values are expected to be used as an exit code for a
|
|
// binary.
|
|
int HandleUsageFlags(std::ostream& out,
|
|
absl::string_view program_usage_message);
|
|
|
|
} // namespace flags_internal
|
|
ABSL_NAMESPACE_END
|
|
} // namespace absl
|
|
|
|
ABSL_DECLARE_FLAG(bool, help);
|
|
ABSL_DECLARE_FLAG(bool, helpfull);
|
|
ABSL_DECLARE_FLAG(bool, helpshort);
|
|
ABSL_DECLARE_FLAG(bool, helppackage);
|
|
ABSL_DECLARE_FLAG(bool, version);
|
|
ABSL_DECLARE_FLAG(bool, only_check_args);
|
|
ABSL_DECLARE_FLAG(std::string, helpon);
|
|
ABSL_DECLARE_FLAG(std::string, helpmatch);
|
|
|
|
#endif // ABSL_FLAGS_INTERNAL_USAGE_H_
|