private bool EvalCondition(Expression expr, TemplateContext context)
{
object val = expr.Eval(context);
if (val is Boolean)
{
return((Boolean)val);
}
else if (val is Int32)
{
return(((Int32)val) != 0);
}
else if (val is Decimal)
{
return(((Decimal)val) != 0);
}
else if (val != null)
{
return(true);
}
else
{
return(false);
}
}
public override object Eval(TemplateContext context)
{
// evaluate right side
object val = rhs.Eval(context);
if (op == TokenType.Minus && val is Decimal)
{
return(-(Decimal)val);
}
else if (op == TokenType.Minus && val is Int32)
{
return(-(Int32)val);
}
else if (op == TokenType.Not && val is Boolean)
{
return(!(Boolean)val);
}
throw new ParserException("Unary operator can be applied to integer, decimal and boolean expressions.", Line, Column);
}
private bool EvalCondition(Expression expr, TemplateContext context)
{
object val = expr.Eval(context);
if (val is Boolean)
return (Boolean)val;
else if (val is Int32)
return ((Int32)val) != 0;
else if (val is Decimal)
return ((Decimal)val) != 0;
else if (val != null)
return true;
else
return false;
}
