TFPFunctionCallBack.GetNodeValue procedure

Member of TFPFunctionCallBackpublicIn unit fpExprPars

Get callback function result

Declaration

pascal

procedure GetNodeValue(var Result: TFPExpressionResult); override

Arguments

Result

Returns the callback function result

Description

The GetNodeValue method evaluates the callback function by calling the registered callback procedure with the function parameters and returns the computed result. It bridges the expression tree evaluation with external function implementations.

An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.