private void RunImpl()
{
Console.Title = Title;
Console.CancelKeyPress += OnCancelKeyPress;
Console.WriteLine(Greeting);
string input;
while (true)
{
Console.ForegroundColor = ConsoleColor.White;
string prompt = (Interpreter.Status == InterpreterStatus.WaitingMoreInput ? PromptMoreInput : Prompt);
Console.Write(prompt);
var result = ReadInput(out input);
//Check the result type - it may be the response to "Abort?" question, not a script to execute.
switch (result)
{
case ReadResult.AbortYes: return; //exit
case ReadResult.AbortNo: continue; //while loop
case ReadResult.Script: break; //do nothing, continue to evaluate script
}
Interpreter.ClearOutputBuffer();
Interpreter.EvaluateAsync(input);
while (Interpreter.IsBusy())
{
Thread.Sleep(50);
}
switch (Interpreter.Status)
{
case InterpreterStatus.Ready: //success
Console.WriteLine(Interpreter.GetOutput());
break;
case InterpreterStatus.SyntaxError:
Console.WriteLine(Interpreter.GetOutput()); //write all output we have
Console.ForegroundColor = ConsoleColor.Red;
foreach (var err in Interpreter.ParsedScript.ParserMessages)
{
Console.WriteLine(string.Empty.PadRight(prompt.Length + err.Location.Column) + "^"); //show err location
Console.WriteLine(err.Message); //print message
}
break;
case InterpreterStatus.RuntimeError:
ReportException();
break;
default: break;
} //switch
}
} //Run method
//This method allows custom implementation of running a sample in Grammar Explorer
// By default it evaluates a parse tree using default interpreter
public virtual string RunSample(ParseTree parsedSample)
{
var interpreter = new ScriptInterpreter(this);
interpreter.Evaluate(parsedSample);
return interpreter.GetOutput();
}
