TFPExprIdentifierDefs¶

Collection class for expression identifier definitions

Declaration¶

Source position: fpexprpars.pp line 575

type

  TFPExprIdentifierDefs = class(TCollection)
  public
    function IndexOfIdentifier : Integer;
    function FindIdentifier : TFPExprIdentifierDef;
    function IdentifierByName : TFPExprIdentifierDef;
    function AddVariable(const AName: ShortString; 
                    AResultType: TResultType; 
                    ACallback: TFPExprVariableCallBack)
                     : TFPExprIdentifierDef;
    function AddVariable(const AName: ShortString; 
                    AResultType: TResultType; 
                    ACallback: TFPExprVariableEvent)
                     : TFPExprIdentifierDef;
    function AddVariable(const AName: ShortString; 
                    AResultType: TResultType; const AValue: AnsiString)
                     : TFPExprIdentifierDef;
    function AddBooleanVariable : TFPExprIdentifierDef;
    function AddIntegerVariable : TFPExprIdentifierDef;
    function AddFloatVariable : TFPExprIdentifierDef;
    function AddCurrencyVariable : TFPExprIdentifierDef;
    function AddStringVariable : TFPExprIdentifierDef;
    function AddDateTimeVariable : TFPExprIdentifierDef;
    function AddFunction(const AName: ShortString; 
                    const AResultType: AnsiChar; 
                    const AParamTypes: AnsiString; 
                    ACallBack: TFPExprFunctionCallBack)
                     : TFPExprIdentifierDef;
    function AddFunction(const AName: ShortString; 
                    const AResultType: AnsiChar; 
                    const AParamTypes: AnsiString; 
                    ACallBack: TFPExprFunctionEvent)
                     : TFPExprIdentifierDef;
    function AddFunction(const AName: ShortString; 
                    const AResultType: AnsiChar; 
                    const AParamTypes: AnsiString; 
                    ANodeClass: TFPExprFunctionClass)
                     : TFPExprIdentifierDef;
    property Identifiers[AIndex : Integer]: TFPExprIdentifierDef; {rw}
  end;

Inheritance¶

Description¶

This collection class manages a set of TFPExprIdentifierDef objects, providing methods for adding, removing, and searching identifier definitions. I t serves as a registry for all available variables and functions in an expression context.

Properties¶

Member	Visibility	Description
Identifiers	public	Access to identifier definitions by index

See all Properties

Methods¶

Member	Visibility	Description
AddBooleanVariable	public	Add a boolean variable to the collection
AddCurrencyVariable	public	Add a currency variable to the collection
AddDateTimeVariable	public	Add a datetime variable to the collection
AddFloatVariable	public	Add a float variable to the collection
AddFunction	public	Add a function to the collection
AddIntegerVariable	public	Add an integer variable to the collection
AddStringVariable	public	Add a string variable to the collection
AddVariable	public	Add a variable to the identifier collection
FindIdentifier	public	Find an identifier by name
IdentifierByName	public	Get an identifier by name
IndexOfIdentifier	public	Find the index of an identifier by name

See all Methods