Abseil Common Libraries (C++) (grcp 依赖)
https://abseil.io/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
81 lines
2.9 KiB
81 lines
2.9 KiB
// |
|
// 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/commandlineflag.h" |
|
#include "absl/flags/declare.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 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_
|
|
|