private void ProcessArguments()
{
while (Arguments.Count > 0)
{
// When we detect the SwitchEscape symbol, we stop processing.
if (Arguments[0] == SwitchEscape)
{
Arguments.RemoveAt(0);
break;
}
var cmdOption =
Options.FirstOrDefault(
option => option.Name == Arguments[0] || option.ShortName == Arguments[0]);
if (cmdOption == null)
{
throw new SyntaxErrorException($"Unknown switch `{Arguments[0]}'");
}
if (cmdOption is ISwitchOption)
{
TrySetValue(cmdOption, cmdOption.EnumValue);
}
// A boolean switch, e.g., '-v' can be specified as an unary switch '-v' or as a binary switch '-v [true|false]'
else if (cmdOption is BoolOption && (Arguments.Count == 1 || IsSwitch(Arguments[1])))
{
TrySetValue(cmdOption, true.ToString());
}
else
{
if (Arguments.Count == 1)
{
throw new SyntaxErrorException($"Switch `{cmdOption.Name}' requires an argument.");
}
if (IsSwitch(Arguments[1]))
{
throw new SyntaxErrorException($"Switch '{cmdOption.Name}' requires an argument.");
}
TrySetValue(cmdOption, Arguments[1]);
Arguments.RemoveAt(0);
}
Arguments.RemoveAt(0);
ProcessedOptions.Add(cmdOption);
if (cmdOption is ICommandOption)
{
break; // Stop option handling when reaching a subcommand switch
}
}
}
/// <summary>
/// Override this method to implement validation of options and arguments after processing.
/// </summary>
protected virtual void ValidateArguments()
{
if (Usage.IsDefined || HasUnprocessedHelp())
{
// Stop validation when '--help' switch is used
return;
}
// Check if all required options have been specified.
foreach (var option in Options.Where(arg => arg.Required))
{
if (ProcessedOptions.Contains(option) == false)
{
throw new SyntaxErrorException($"Required switch `{option.Name}' is missing.");
}
}
}
