61 lines
2.3 KiB
C
61 lines
2.3 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.
|
||
|
|
//
|
||
|
|
// -----------------------------------------------------------------------------
|
||
|
|
// File: parse.h
|
||
|
|
// -----------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// This file defines the main parsing function for Abseil flags:
|
||
|
|
// `absl::ParseCommandLine()`.
|
||
|
|
|
||
|
|
#ifndef ABSL_FLAGS_PARSE_H_
|
||
|
|
#define ABSL_FLAGS_PARSE_H_
|
||
|
|
|
||
|
|
#include <vector>
|
||
|
|
|
||
|
|
#include "absl/base/config.h"
|
||
|
|
#include "absl/flags/internal/parse.h"
|
||
|
|
|
||
|
|
namespace absl {
|
||
|
|
ABSL_NAMESPACE_BEGIN
|
||
|
|
|
||
|
|
// ParseCommandLine()
|
||
|
|
//
|
||
|
|
// Parses the set of command-line arguments passed in the `argc` (argument
|
||
|
|
// count) and `argv[]` (argument vector) parameters from `main()`, assigning
|
||
|
|
// values to any defined Abseil flags. (Any arguments passed after the
|
||
|
|
// flag-terminating delimiter (`--`) are treated as positional arguments and
|
||
|
|
// ignored.)
|
||
|
|
//
|
||
|
|
// Any command-line flags (and arguments to those flags) are parsed into Abseil
|
||
|
|
// Flag values, if those flags are defined. Any undefined flags will either
|
||
|
|
// return an error, or be ignored if that flag is designated using `undefok` to
|
||
|
|
// indicate "undefined is OK."
|
||
|
|
//
|
||
|
|
// Any command-line positional arguments not part of any command-line flag (or
|
||
|
|
// arguments to a flag) are returned in a vector, with the program invocation
|
||
|
|
// name at position 0 of that vector. (Note that this includes positional
|
||
|
|
// arguments after the flag-terminating delimiter `--`.)
|
||
|
|
//
|
||
|
|
// After all flags and flag arguments are parsed, this function looks for any
|
||
|
|
// built-in usage flags (e.g. `--help`), and if any were specified, it reports
|
||
|
|
// help messages and then exits the program.
|
||
|
|
std::vector<char*> ParseCommandLine(int argc, char* argv[]);
|
||
|
|
|
||
|
|
ABSL_NAMESPACE_END
|
||
|
|
} // namespace absl
|
||
|
|
|
||
|
|
#endif // ABSL_FLAGS_PARSE_H_
|