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/*
* Copyright 2015 WebAssembly Community Group participants
*
* 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
*
* http://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.
*/
//
// Command line helpers.
//
#ifndef wasm_support_command_line_h
#define wasm_support_command_line_h
#include <functional>
#include <map>
#include <string>
#include <utility>
#include <vector>
#include "wasm.h"
namespace wasm {
class Options {
public:
using Action = std::function<void(Options*, const std::string&)>;
enum class Arguments {
// No arguments.
Zero,
// One argument, in the form --flag A or --flag=A
One,
// Multiple arguments, in the form --flag A B C
N,
// An optional single argument, in the form --flag=A (we disallow --flag A
// as that would be ambiguous regarding whether A is another flag, or an
// argument to us).
Optional
};
bool debug;
std::map<std::string, std::string> extra;
Options(const std::string& command, const std::string& description);
~Options();
Options& add(const std::string& longName,
const std::string& shortName,
const std::string& description,
const std::string& category,
Arguments arguments,
const Action& action,
bool hidden = false);
Options& add_positional(const std::string& name,
Arguments arguments,
const Action& action);
void parse(int argc, const char* argv[]);
private:
struct Option {
std::string longName;
std::string shortName;
std::string description;
std::string category;
Arguments arguments;
Action action;
bool hidden;
size_t seen;
};
std::vector<Option> options;
Arguments positional;
std::string positionalName;
Action positionalAction;
// The category names, in the order in which help will be printed.
std::vector<std::string> categories;
};
} // namespace wasm
#endif // wasm_support_command_line_h
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