TFPBinaryOperation¶

Internally used class for binary operations with left and right operands

Declaration¶

Source position: fpexprpars.pp line 133

type

  TFPBinaryOperation = class(TFPExprNode)
  public
    constructor Create;
    destructor Destroy;
    procedure InitAggregate;
    procedure UpdateAggregate;
    function HasAggregate : Boolean;
    procedure Check;
    property left: TFPExprNode; {r}
    property Right: TFPExprNode; {r}
  end;

Inheritance¶

Description¶

This TFPBinaryOperation is the base class for all binary operations in the expression parser. Binary operations take two operands (left and right) and perform some operation to produce a result. It extends TFPExprNode to provide the foundation for all two-operand operations.

The class manages the operand nodes and provides common functionality such as aggregate handling, validation, and resource management that is shared by all binary operations.

Derived classes implement specific operations such as arithmetic operations (+, -, *, /), comparison operations (=, <, >), and logical operations (and, or, xor). Each operation defines its own evaluation logic while leveraging the common binary operation infrastructure.

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.

Properties¶

Member	Visibility	Description
left read only	public	Left operand of the binary operation
Right read only	public	Right operand of the binary operation

See all Properties

Methods¶

Member	Visibility	Description
Check	public	Validate the binary operation for correctness
Create	public	Create binary operation with left and right operands
Destroy	public	Destroy binary operation and free resources
HasAggregate	public	Check if binary operation contains aggregates
InitAggregate	public	Initialize aggregate processing for binary operation
UpdateAggregate	public	Update aggregate calculations for binary operation

See all Methods