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//===-- CommandObjectSyntax.cpp ---------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "CommandObjectSyntax.h"
#include "CommandObjectHelp.h"
#include "lldb/Interpreter/Args.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/CommandObjectMultiword.h"
#include "lldb/Interpreter/CommandReturnObject.h"
#include "lldb/Interpreter/Options.h"
using namespace lldb;
using namespace lldb_private;
//-------------------------------------------------------------------------
// CommandObjectSyntax
//-------------------------------------------------------------------------
CommandObjectSyntax::CommandObjectSyntax(CommandInterpreter &interpreter)
: CommandObjectParsed(
interpreter, "syntax",
"Shows the correct syntax for a given debugger command.",
"syntax <command>") {
CommandArgumentEntry arg;
CommandArgumentData command_arg;
// Define the first (and only) variant of this arg.
command_arg.arg_type = eArgTypeCommandName;
command_arg.arg_repetition = eArgRepeatPlain;
// There is only one variant this argument could be; put it into the argument
// entry.
arg.push_back(command_arg);
// Push the data for the first argument into the m_arguments vector.
m_arguments.push_back(arg);
}
CommandObjectSyntax::~CommandObjectSyntax() = default;
bool CommandObjectSyntax::DoExecute(Args &command,
CommandReturnObject &result) {
CommandObject::CommandMap::iterator pos;
CommandObject *cmd_obj;
const size_t argc = command.GetArgumentCount();
if (argc == 0) {
result.AppendError("Must call 'syntax' with a valid command.");
result.SetStatus(eReturnStatusFailed);
return false;
}
cmd_obj = m_interpreter.GetCommandObject(command[0].ref);
bool all_okay = llvm::all_of(
command.entries().drop_front(), [&cmd_obj](const Args::ArgEntry &e) {
if (!cmd_obj || !cmd_obj->IsMultiwordObject())
return false;
if (!(cmd_obj = cmd_obj->GetSubcommandObject(e.ref)))
return false;
return true;
});
if (!all_okay) {
std::string cmd_string;
command.GetCommandString(cmd_string);
StreamString error_msg_stream;
const bool generate_apropos = true;
const bool generate_type_lookup = false;
CommandObjectHelp::GenerateAdditionalHelpAvenuesMessage(
&error_msg_stream, cmd_string, "", "", generate_apropos,
generate_type_lookup);
result.AppendErrorWithFormat("%s", error_msg_stream.GetData());
result.SetStatus(eReturnStatusFailed);
return false;
}
Stream &output_strm = result.GetOutputStream();
if (cmd_obj->GetOptions() != nullptr) {
output_strm.Printf("\nSyntax: %s\n", cmd_obj->GetSyntax().str().c_str());
output_strm.Printf(
"(Try 'help %s' for more information on command options syntax.)\n",
cmd_obj->GetCommandName().str().c_str());
result.SetStatus(eReturnStatusSuccessFinishNoResult);
} else {
output_strm.Printf("\nSyntax: %s\n", cmd_obj->GetSyntax().str().c_str());
result.SetStatus(eReturnStatusSuccessFinishNoResult);
}
return result.Succeeded();
}
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