protected override object CompileUnaryExpression(UnaryExpression expression)
{
object value = CompileExpression(expression.Expression);
UnaryOperatorType @operator = expression.Operator;
if (expression.Expression is IdentifierExpression identifierExpression)
{
if (CompilerContext.ContainsPropety(identifierExpression.Name) == false)
{
CompilerContext.ErrorHandler.ThrowError(new SyntaxError($"Identifier '{identifierExpression.Name}' is not defined", null));
return(null);
}
CompilerContext.DeleteProperty(identifierExpression);
return(null);
}
if (expression.Expression is Function function)
{
if (CompilerContext.ContainsFunction(function.Name) == false)
{
CompilerContext.ErrorHandler.ThrowError(new SyntaxError($"Function '{function.Name}' is not defined", null));
return(null);
}
CompilerContext.DeleteFunction(function);
return(null);
}
if (DustType.GetDustType(value) == DustType.Number)
{
switch (@operator)
{
case UnaryOperatorType.PLUS_PLUS:
if (DustType.GetDustType(value) == DustType.Int)
{
return((int)value + 1);
}
return(Convert.ToSingle(value) + 1);
case UnaryOperatorType.MINUS_MINUS:
if (DustType.GetDustType(value) == DustType.Int)
{
return((int)value - 1);
}
return(Convert.ToSingle(value) - 1);
case UnaryOperatorType.TIMES_TIMES:
if (DustType.GetDustType(value) == DustType.Int)
{
return(Math.Pow((int)value, 2));
}
return(Math.Pow(Convert.ToSingle(value), 2));
case UnaryOperatorType.DIVIDE_DIVIDE:
if (DustType.GetDustType(value) == DustType.Int)
{
return(Math.Sqrt((int)value));
}
return(Math.Sqrt(Convert.ToSingle(value)));
}
}
if (DustType.GetDustType(value) == DustType.Bool)
{
switch (@operator)
{
case UnaryOperatorType.BANG:
if (DustType.GetDustType(value) == DustType.Bool)
{
return(!(bool)value);
}
break;
}
}
return(null);
}
