xref: /llvm-project-15.0.7/lldb/source/Commands/CommandObjectHelp.h (revision 91688716)

//===-- CommandObjectHelp.h -------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef LLDB_SOURCE_COMMANDS_COMMANDOBJECTHELP_H
#define LLDB_SOURCE_COMMANDS_COMMANDOBJECTHELP_H

#include "lldb/Host/OptionParser.h"
#include "lldb/Interpreter/CommandObject.h"
#include "lldb/Interpreter/Options.h"

namespace lldb_private {

// CommandObjectHelp

class CommandObjectHelp : public CommandObjectParsed {
public:
  CommandObjectHelp(CommandInterpreter &interpreter);

  ~CommandObjectHelp() override;

  void HandleCompletion(CompletionRequest &request) override;

  static void GenerateAdditionalHelpAvenuesMessage(
      Stream *s, llvm::StringRef command, llvm::StringRef prefix,
      llvm::StringRef subcommand, bool include_upropos = true,
      bool include_type_lookup = true);

  class CommandOptions : public Options {
  public:
    CommandOptions() = default;

    ~CommandOptions() override = default;

    Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_arg,
                          ExecutionContext *execution_context) override {
      Status error;
      const int short_option = m_getopt_table[option_idx].val;

      switch (short_option) {
      case 'a':
        m_show_aliases = false;
        break;
      case 'u':
        m_show_user_defined = false;
        break;
      case 'h':
        m_show_hidden = true;
        break;
      default:
        llvm_unreachable("Unimplemented option");
      }

      return error;
    }

    void OptionParsingStarting(ExecutionContext *execution_context) override {
      m_show_aliases = true;
      m_show_user_defined = true;
      m_show_hidden = false;
    }

    llvm::ArrayRef<OptionDefinition> GetDefinitions() override;

    // Instance variables to hold the values for command options.

    bool m_show_aliases;
    bool m_show_user_defined;
    bool m_show_hidden;
  };

  Options *GetOptions() override { return &m_options; }

protected:
  bool DoExecute(Args &command, CommandReturnObject &result) override;

private:
  CommandOptions m_options;
};

} // namespace lldb_private

#endif // LLDB_SOURCE_COMMANDS_COMMANDOBJECTHELP_H