public object visitPrefixExpr(Expr.prefix pf)
{
object value = evaluate(pf.expr);
checkNumberOperand(pf.keyword, value);
if (pf.keyword.type == TokenType.PLUS_PLUS)
{
value = ((double)value) + 1.0;
}
else
{
value = ((double)value) - 1.0;
}
if (locals.TryGetValue(pf.expr, out int distance))
{
environment.assignAt(distance, new HelperFunctions.GetToken().evaluate(pf.expr), (double)value); //Assign value after change.
}
else
{
globals.assignAt(distance, new HelperFunctions.GetToken().evaluate(pf.expr), (double)value);
}
return(value);
}
public object visitPrefixExpr(Expr.prefix pf) //These two functions may need further resolution
{
resolve(pf.expr);
return(null);
}
public string visitPrefixExpr(Expr.prefix pf)
{
return(parenthesize("p" + pf.keyword.lexeme, new Expr[] { pf.expr }));
}