public override string Execute(string input, TextWriter output)
{
// A bit awkward, but we need to set up a match against the whole input
// along with the resulting separators and everything, because that's
// what the Replacer eats.
var regex = new Regex(@"\A(?s:.*)\z");
var matches = new List <MatchContext>();
matches.Add(new MatchContext(regex.Match(input), regex, Replacer));
var separators = new List <MatchContext>();
var startRegex = new Regex(@"\A");
separators.Add(new MatchContext(startRegex.Match(input), startRegex, Replacer));
var endRegex = new Regex(@"\z");
separators.Add(new MatchContext(endRegex.Match(input), endRegex, Replacer));
string evalInput = Replacer.Process(input, matches, separators, 0);
string source = ChildStage.Execute(input, output);
if (Config.Reverse)
{
string temp = source;
source = evalInput;
evalInput = temp;
}
var interpreter = new Interpreter(source.Split(new[] { '\n' }).Select(line => line.Replace('¶', '\n')).ToList());
var evalOutput = new StringWriter();
interpreter.Execute(evalInput, evalOutput);
string result = evalOutput.ToString();
if (RegisterWithHistory)
{
History.RegisterResult(HistoryIndex, result);
}
return(result);
}
public override string Execute(string input, TextWriter output)
{
string result = input;
if (Config.Random)
{
while (true)
{
if (Random.RNG.Next(2) == 0)
{
break;
}
result = ChildStage.Execute(result, output).ToString();
}
}
else if (Config.RegexParam != null)
{
while (Config.RegexParam.Match(result).Success ^ Config.Reverse)
{
result = ChildStage.Execute(result, output).ToString();
}
}
else
{
bool limitedIterations = false;
int iterationCount = 0;
if (Config.StringParam != null)
{
limitedIterations = true;
// A bit awkward, but we need to set up a match against the whole input
// along with the resulting separators and everything, because that's
// what the Replacer eats.
var regex = new Regex(@"\A(?s:.*)\z");
var matches = new List <MatchContext>();
matches.Add(new MatchContext(regex.Match(input), regex, Replacer));
var separators = new List <MatchContext>();
var startRegex = new Regex(@"\A");
separators.Add(new MatchContext(startRegex.Match(input), startRegex, Replacer));
var endRegex = new Regex(@"\z");
separators.Add(new MatchContext(endRegex.Match(input), endRegex, Replacer));
string countString = Replacer.Process(input, matches, separators, 0);
var countRegex = new Regex(@"-?\d+");
var countMatch = countRegex.Match(countString);
iterationCount = countMatch.Success ? int.Parse(countMatch.Value) : 0;
}
else if (Config.GetLimitCount() > 0)
{
limitedIterations = true;
iterationCount = Config.GetLimit(0).End;
}
if (limitedIterations && iterationCount < 0)
{
for (int i = 0; i < -iterationCount; ++i)
{
result = ChildStage.Execute(result, output).ToString();
}
}
else
{
int i = 0;
string lastResult;
do
{
if (limitedIterations && i >= iterationCount)
{
break;
}
++i;
lastResult = result;
result = ChildStage.Execute(lastResult, output).ToString();
} while (lastResult != result);
}
}
if (RegisterWithHistory)
{
History.RegisterResult(HistoryIndex, result);
}
return(result);
}