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    TFPExprIdentifierDefs.AddVariable

    Add a variable to the identifier collection

    Declaration

    Source position: fpexprpars.pp line 587

    public 
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;

    Description

    The AddVariable method creates and adds a new variable identifier to the collection with the specified name and value. The variable can then be referenced in expressions by its name to retrieve the stored value.