private bool HandleHelp(string firstArg, object target)
{
var arg = firstArg;
if (ArgumentPrefixes.Contains(firstArg[0].ToString()))
{
arg = firstArg.Substring(1);
}
Action <string> helpHandler = GetRegisteredHelpHandler(arg);
if (helpHandler != null)
{
helpHandler(m_helpGenerator.GetHelp(this));
return(true);
}
var definedHelpMethods = Type.GetMethodsWith <HelpAttribute>();
foreach (var method in definedHelpMethods)
{
var att = method.GetAttribute <HelpAttribute>();
var name = att.Name ?? method.Name;
if (name.Equals(arg, StringComparison.InvariantCultureIgnoreCase) ||
att.Aliases.CommaSplit().Any(s => s.Equals(arg, StringComparison.InvariantCultureIgnoreCase)))
{
try
{
VerifyMethodAndTarget(method, target);
var obj = method.IsStatic ? null : target;
MethodInvoker.Invoke(method, obj, new[] { m_helpGenerator.GetHelp(this) });
return(true);
}
catch (TargetParameterCountException ex)
{
throw new InvalidHelpHandlerException(method, ex);
}
catch (ArgumentException ex)
{
throw new InvalidHelpHandlerException(method, ex);
}
}
}
return(false);
}
/// <summary>
/// Gets a help string that describes all the parser information for the user
/// </summary>
public string GetHelpString()
{
return(HelpGenerator.GetHelp(Types.Select(t => new ParserRunner(t, Register, HelpGenerator))));
}