private static int EvaluateLine(string line, int pc, MachineState state)
{
var tokens = Tokenizer.TryTokenize(line);
if (!tokens.HasValue)
{
Error(() => {
ErrorSpan(tokens.Location);
Console.WriteLine();
Console.Error.WriteLine(tokens.FormatErrorMessageFragment());
});
Console.WriteLine("Press any key to try this line again");
Console.ReadKey(true);
return(pc);
}
var parsed = Parser.TryParse(tokens.Value);
if (!parsed.HasValue)
{
Error(() => {
ErrorSpan(tokens.Location);
Console.WriteLine();
Console.Error.WriteLine(parsed.FormatErrorMessageFragment());
});
Console.WriteLine("Press any key to try this line again");
Console.ReadKey(true);
return(pc);
}
if (parsed.Remainder.Any())
{
Error(() => {
Console.WriteLine("Failed to parse entire line");
foreach (var token in parsed.Remainder)
{
Console.WriteLine($" - {token}");
}
});
Console.WriteLine("Press any key to try this line again");
Console.ReadKey(true);
return(pc);
}
return(parsed.Value.Evaluate(pc, state));
}
private static int EvaluateLine(string line, int pc, MachineState state)
{
var tokens = Tokenizer.TryTokenize(line);
if (!tokens.HasValue)
{
Error(() => {
ErrorSpan(tokens.Location);
Console.WriteLine();
Console.Error.WriteLine(tokens.FormatErrorMessageFragment());
});
Console.WriteLine("Press any key to try this line again");
Console.ReadKey(true);
return(pc);
}
var parsed = Parser.TryParseLine(tokens.Value);
if (!parsed.HasValue)
{
Error(() => {
ErrorSpan(tokens.Location);
Console.WriteLine();
Console.Error.WriteLine(parsed.FormatErrorMessageFragment());
});
Console.WriteLine("Press any key to try this line again");
Console.ReadKey(true);
return(pc);
}
if (parsed.Remainder.Any())
{
Error(() => {
Console.WriteLine("Failed to parse entire line");
foreach (var token in parsed.Remainder)
{
Console.WriteLine($" - {token}");
}
});
Console.WriteLine("Press any key to try this line again");
Console.ReadKey(true);
return(pc);
}
try
{
return(parsed.Value.Evaluate(pc, state));
}
catch (ExecutionException ee)
{
var c = Console.ForegroundColor;
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine($"Runtime Error: {ee.Message}");
Console.ForegroundColor = c;
return(pc + 1);
}
}