ConditionalAnd with variables
See original GitHub issueFirst, I want to say it’s a fascinating and high-quality module, congratulations and thank you for putting it up here!
I have a problem evaluating expressions with variables when using ConditionalAnd and null values:
Dictionary<string, object> dictValues = new Dictionary<string, object>();
string nullString = null;
dictValues[ "TestNullString" ] = nullString;
//pass dictValues as expEval.Variables into expression evaluation instance and then...
string expression = "!string.IsNullOrEmpty(TestNullString) && TestNullString.StartsWith(\"ABC\")";
var result = expEval.Evaluate(expression);
This throws a NullReferenceException with the second half, where “plain C#” would skip evaluating this part. The issue seems related to some that were discussed here recently, especially #51 and #53, but the fixes don’t address it. The exception details are:
at ExpressionEvaluator.DetermineInstanceOrStatic(Type& objType, Object& obj, ValueTypeNestingTrace& valueTypeNestingTrace) in EvaluatorTest\ExpressionEvaluator.cs
Issue Analytics
- State:
- Created 3 years ago
- Comments:10 (7 by maintainers)
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Hello @codingseb, I am a coworker of @HelgeL and we had another look at the problem. We figured out a way to realize left associativity and put together a solution that’s working for our cases and passes all of your test cases as well. I will add a few comments to it and than suggest a pull request for our fork. Maybe it will help you or others.
Just published version 1.4.13.0 with additionals corrections for this. And some Refactoring and simplification.