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Is it possible to find which variables were modified during expression evaluation? #165
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Hi @mercurial-moon.
Thanks for your issue.For now there is no event for variable assignation equivalent to PreEvaluateVariable or EvaluateVariable.
As I do not have so much time to continue developping ExpressionEvaluator I don't know when I could add this.But for your case, there is maybe an alternative way by inheritance.
using CodingSeb.ExpressionEvaluator; public class YourEvaluator : ExpressionEvaluator { protected override void AssignVariable(string varName, object value) { // Do What you want here for pre assignation // Here we redo what ExpressionEvaluator would do base.AssignVariable(varName,value) // Do What you want here for postassignation }
I hope it helps
Reacted by Mercurial
Hi,
For an expression like
a = b * cwe know that
awould be modified after evaluating the expression.Is there a mechanism in
ExpressionEvaluatorwhich tells us thatawill/could be modified after evaluating the expression.ExpressionEvaluatorhas aPreEvaluateVariableevent but that is fired for all variables in the expression, i`m looking to find the variables on the left hand side of the expression.This could be done in string processing but was hoping if there is a better way where I could have the expression engine to tell me.