TFPSubtractOperation class
Internally used class for subtraction operations
Declaration
TFPSubtractOperation = class(TMathOperation)Inheritance
- TFPSubtractOperation
- TMathOperation
- TFPBinaryOperation
- TFPExprNode
- TObject
Description
The TFPSubtractOperation class implements the subtraction operation between two numeric operands.
It extends the binary operation framework to provide subtraction-specific functionality for integers, floats, and currency values.
The operation handles type conversion automatically when operands have different numeric types, promoting the result to the more precise type as needed. The result type follows standard numeric promotion rules.
The subtraction operation computes the difference between the left operand (minuend) and the right operand (subtrahend), returning left - right.
This class is used internally by the TFPExpressionParser class to construct an AST (Abstract Syntax Tree). There is normally no need for you to use or instantiate this class directly.
See also
Methods
Check | public | Validate the subtraction operation for correctness |
GetNodeValue | public | Calculate the result of subtraction operation |
AsString | public | Get string representation of subtraction operation |
Inherited
From TMathOperation (1)
From TFPBinaryOperation (8)
CheckSameNodeTypes Create Destroy HasAggregate InitAggregate left Right UpdateAggregate
From TFPExprNode (3)
From TObject (40)
AfterConstruction BeforeDestruction CheckDisposed ClassInfo ClassName ClassNameIs ClassParent ClassType CleanupInstance DefaultHandler DefaultHandlerStr Dispatch DispatchStr Disposed DisposeOf Equals FieldAddress Free FreeInstance GetDisposed GetHashCode GetInterface GetInterfaceByStr GetInterfaceEntry GetInterfaceEntryByStr GetInterfaceTable GetInterfaceWeak GetLastCastErrorInfo InheritsFrom InitInstance InstanceSize MethodAddress MethodName newinstance QualifiedClassName SafeCallException StringMessageTable SystemHasExtendedRTTI ToString UnitName
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.