|
RAD Studio VCL Reference
|
  |
   |
TCustomVariantType.CompareOp Method
|
RAD Studio VCL Reference
|
|
|
Implements any comparison operations of which the custom Variant type is capable.
function CompareOp(const Left: TVarData; const Right: TVarData; const Operator: TVarOp): Boolean; virtual;
virtual __fastcall Boolean CompareOp(const TVarData Left, const TVarData Right, const TVarOp Operator);
Override CompareOp to implement any comparison operators the custom Variant type supports. Descendants can implement comparison operators by overriding either the Compare or the CompareOp method.
Left is the value that appears to the left of the operator.
Right is the value that appears to the right of the operator.
Operator identifies the operator that appears between Left and Right. It can be any of the following values:
|
Value |
Operation |
|
opCmpEQ |
equality comparison |
|
opCmpNE |
inequality comparison |
|
opCmpLT |
less than |
|
opCmpLE |
less than or equal |
|
opCmpGT |
greater than |
|
opCmpGE |
greater than or equal |
CompareOp returns true if the comparison is true as specified. It returns false if the specified comparison does not hold true.
As implemented in TCustomVariantType, CompareOp raises a system error indicating an invalid operation.
|
Copyright(C) 2008 CodeGear(TM). All Rights Reserved.
|
|
What do you think about this topic? Send feedback!
|
Description