public override IExpression Rewrite(IEquality equality)
{
base.Rewrite(equality);
var cc2 = equality.RightOperand as CompileTimeConstant;
if (cc2 != null && ExpressionHelper.IsNumericZero(cc2) && equality.LeftOperand.Type.TypeCode == PrimitiveTypeCode.Boolean)
{
return(IfThenElseReplacer.InvertCondition(equality.LeftOperand));
}
return(equality);
}
public override IExpression Rewrite(ILogicalNot logicalNot)
{
if (logicalNot.Type is Dummy)
{
return(IfThenElseReplacer.InvertCondition(this.Rewrite(logicalNot.Operand)));
}
else if (logicalNot.Operand.Type.TypeCode == PrimitiveTypeCode.Int32)
{
return new Equality()
{
LeftOperand = this.Rewrite(logicalNot.Operand),
RightOperand = new CompileTimeConstant()
{
Value = 0, Type = this.host.PlatformType.SystemInt32
},
Type = this.host.PlatformType.SystemBoolean,
}
}
;
else
{
var castIfPossible = logicalNot.Operand as CastIfPossible;
if (castIfPossible != null)
{
var mutableLogicalNot = logicalNot as LogicalNot;
if (mutableLogicalNot != null)
{
var operand = new CheckIfInstance()
{
Locations = castIfPossible.Locations,
Operand = castIfPossible.ValueToCast,
Type = this.host.PlatformType.SystemBoolean,
TypeToCheck = castIfPossible.TargetType,
};
mutableLogicalNot.Operand = operand;
return(mutableLogicalNot);
}
}
return(base.Rewrite(logicalNot));
}
}