public IEnumerable <Command> ParseVMCommands(VMCommandsContext context, string[] lines)
{
var remainingLines = StripComments(lines);
return(remainingLines.Select(line => _commandFactory.Create(context, line)));
}
public Command Create(VMCommandsContext context, string line)
{
var commandFields = line.Split(' ');
var commandName = commandFields[0];
var segment = commandFields.Length > 1 ? commandFields[1] : null;
var index = commandFields.Length > 2 ? commandFields[2] : null;
switch (commandName)
{
case "push":
return(new Push(context, segment, index));
case "pop":
return(new Pop(context, segment, index));
case "add":
return(new Add());
case "sub":
return(new Sub());
case "eq":
return(new Eq());
case "lt":
return(new Lt());
case "gt":
return(new Gt());
case "neg":
return(new Neg());
case "and":
return(new And());
case "or":
return(new Or());
case "not":
return(new Not());
case "label":
return(new Label(context, segment));
case "goto":
return(new Goto(context, segment));
case "if-goto":
return(new IfGoto(context, segment));
case "function":
return(new Function(context, segment, index));
case "return":
return(new Return(context));
case "call":
return(new Call(context, segment, index));
default:
throw new NotSupportedException();
}
}