public IValue interpret(IValue lval, IValue rval)
{
if (lval is BooleanValue && rval is BooleanValue)
{
return(BooleanValue.ValueOf(((BooleanValue)lval).Value || ((BooleanValue)rval).Value));
}
else
{
throw new SyntaxError("Illegal: " + lval.GetType().Name + " + " + rval.GetType().Name);
}
}
public override IValue ConvertCSharpValueToIValue(Context context, Object value)
{
if (value is bool)
{
return(BooleanValue.ValueOf((bool)value));
}
else if (value is bool?)
{
return(BooleanValue.ValueOf(((bool?)value).Value));
}
else
{
return((IValue)value); // TODO for now
}
}
public IValue interpret(Context context, IValue lval, IValue rval)
{
bool equal = false;
switch (oper)
{
case EqOp.IS:
equal = lval == rval;
break;
case EqOp.IS_NOT:
equal = lval != rval;
break;
case EqOp.IS_A:
equal = isA(context, lval, rval);
break;
case EqOp.IS_NOT_A:
equal = !isA(context, lval, rval);
break;
case EqOp.EQUALS:
equal = lval.Equals(context, rval);
break;
case EqOp.NOT_EQUALS:
equal = !lval.Equals(context, rval);
break;
case EqOp.CONTAINS:
equal = lval.Contains(context, rval);
break;
case EqOp.NOT_CONTAINS:
equal = !lval.Contains(context, rval);
break;
case EqOp.ROUGHLY:
equal = lval.Roughly(context, (IValue)rval);
break;
}
return(BooleanValue.ValueOf(equal));
}
private BooleanValue compare(Context context, IValue lval, IValue rval)
{
Int32 cmp = lval.CompareTo(context, rval);
switch (oper)
{
case CmpOp.GT:
return(BooleanValue.ValueOf(cmp > 0));
case CmpOp.LT:
return(BooleanValue.ValueOf(cmp < 0));
case CmpOp.GTE:
return(BooleanValue.ValueOf(cmp >= 0));
case CmpOp.LTE:
return(BooleanValue.ValueOf(cmp <= 0));
default:
throw new SyntaxError("Illegal compare operand: " + oper.ToString());
}
}
