public override void Execute(Interpreter interpreter, TokenMarker tokenMarker)
{
// TAB is only valid inside a PRINT command.
if (!(interpreter.CurrentCommandToken is PrintToken))
{
throw new Exceptions.SyntaxErrorException();
}
// Make sure next token is a '('.
if (tokenMarker.Token == null || !(tokenMarker.Token is OpenParenToken))
{
throw new Exceptions.SyntaxErrorException();
}
var valueToken = interpreter.ExpressionEvaluator.Evaluate(tokenMarker);
if (!(valueToken is NumericValueToken numericValueToken))
{
throw new Exceptions.TypeMismatchException();
}
// Make sure last token in expression ended in a ')'.
if (!(tokenMarker.PeekPrev() is CloseParenToken))
{
throw new Exceptions.SyntaxErrorException();
}
var newColumn = numericValueToken.IntValue;
if (newColumn < 0 || newColumn > 255)
{
throw new Exceptions.IllegalQuantityException();
}
// If the current cursor column is already beyond the new column, don't move the cursor
if (interpreter.Console.CursorColumn > newColumn)
{
return;
}
interpreter.Console.Tab(newColumn);
}
public override void Execute(Interpreter interpreter, TokenMarker tokenMarker)
{
// SPC is only valid inside a PRINT command
if (!(interpreter.CurrentCommandToken is PrintToken))
{
throw new Exceptions.SyntaxErrorException();
}
// Make sure next token is a '('.
if (tokenMarker.Token == null || !(tokenMarker.Token is OpenParenToken))
{
throw new Exceptions.SyntaxErrorException();
}
var valueToken = interpreter.ExpressionEvaluator.Evaluate(tokenMarker);
if (!(valueToken is NumericValueToken numericValueToken))
{
throw new Exceptions.TypeMismatchException();
}
// Make sure last token in expression ended in a ')'.
if (!(tokenMarker.PeekPrev() is CloseParenToken))
{
throw new Exceptions.SyntaxErrorException();
}
var value = numericValueToken.IntValue;
if (value < 0 || value > 255)
{
throw new Exceptions.IllegalQuantityException();
}
interpreter.Console.Spc(value);
}