Abseil Common Libraries (C++) (grcp 依赖)
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59 lines
2.2 KiB
59 lines
2.2 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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//
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// -----------------------------------------------------------------------------
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// File: parse.h
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// -----------------------------------------------------------------------------
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//
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// This file defines the main parsing function for Abseil flags:
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// `absl::ParseCommandLine()`.
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#ifndef ABSL_FLAGS_PARSE_H_
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#define ABSL_FLAGS_PARSE_H_
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#include <string>
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#include <vector>
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#include "absl/flags/internal/parse.h"
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namespace absl {
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// ParseCommandLine()
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//
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// Parses the set of command-line arguments passed in the `argc` (argument
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// count) and `argv[]` (argument vector) parameters from `main()`, assigning
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// values to any defined Abseil flags. (Any arguments passed after the
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// flag-terminating delimiter (`--`) are treated as positional arguments and
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// ignored.)
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//
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// Any command-line flags (and arguments to those flags) are parsed into Abseil
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// Flag values, if those flags are defined. Any undefined flags will either
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// return an error, or be ignored if that flag is designated using `undefok` to
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// indicate "undefined is OK."
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//
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// Any command-line positional arguments not part of any command-line flag (or
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// arguments to a flag) are returned in a vector, with the program invocation
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// name at position 0 of that vector. (Note that this includes positional
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// arguments after the flag-terminating delimiter `--`.)
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//
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// After all flags and flag arguments are parsed, this function looks for any
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// built-in usage flags (e.g. `--help`), and if any were specified, it reports
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// help messages and then exits the program.
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std::vector<char*> ParseCommandLine(int argc, char* argv[]);
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} // namespace absl
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#endif // ABSL_FLAGS_PARSE_H_
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