Abseil Common Libraries (C++) (grcp 依赖)
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60 lines
2.2 KiB
60 lines
2.2 KiB
// |
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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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ABSL_NAMESPACE_BEGIN |
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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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ABSL_NAMESPACE_END |
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} // namespace absl |
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#endif // ABSL_FLAGS_PARSE_H_
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