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Efficient Processing, Compilation, and Execution of Expression Trees at Runtime

License: MIT License

C# 100.00%
expression-tree linq-expressions linq expression-evaluator expression-comparer

expression-utils's People

Contributors

jsboige avatar khazuar avatar leo-labs avatar majorius1 avatar nifdee avatar saraedum avatar suzgupta avatar

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Forkers

saraedum sdemkiv leo-labs myintelligenceagency majorius1 mat3oo myk0la999

expression-utils's Issues

PartialEvaluation is not strict about .Value

Trying to use PartialEvaluator.PartialEvalBody(where, ExpressionInterpreter.Instance); to remove the closure from u => u.UserID.Value > 1 where UserID is a ulong? produces the following error:

 ---> Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: Operator '>' cannot be applied to operands of type 'int' and 'ulong'
   at CallSite.Target(Closure , CallSite , Object , Object )
   at System.Dynamic.UpdateDelegates.UpdateAndExecute2[T0,T1,TRet](CallSite site, T0 arg0, T1 arg1)
   at MiaPlaza.ExpressionUtils.Evaluating.ExpressionInterpreter.ExpressionInterpretationVisitor.uncheckedConvert(Object original, Type target)
   at System.Dynamic.UpdateDelegates.UpdateAndExecute3[T0,T1,T2,TRet](CallSite site, T0 arg0, T1 arg1, T2 arg2)
   at MiaPlaza.ExpressionUtils.Evaluating.ExpressionInterpreter.ExpressionInterpretationVisitor.GetResultFromUnary(UnaryExpression exp)
   at MiaPlaza.ExpressionUtils.ExpressionResultVisitor`1.DispatchVisitor.VisitUnary(UnaryExpression node)
   at System.Linq.Expressions.UnaryExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at MiaPlaza.ExpressionUtils.ExpressionResultVisitor`1.GetResultFromExpression(Expression expression)
   at MiaPlaza.ExpressionUtils.Evaluating.ExpressionInterpreter.ExpressionInterpretationVisitor.GetResultFromExpression(Expression exp)
   at MiaPlaza.ExpressionUtils.Evaluating.ExpressionInterpreter.ExpressionInterpretationVisitor.GetResultFromUnary(UnaryExpression exp)
   at MiaPlaza.ExpressionUtils.ExpressionResultVisitor`1.DispatchVisitor.VisitUnary(UnaryExpression node)
   at System.Linq.Expressions.UnaryExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at MiaPlaza.ExpressionUtils.ExpressionResultVisitor`1.GetResultFromExpression(Expression expression)
   at MiaPlaza.ExpressionUtils.Evaluating.ExpressionInterpreter.ExpressionInterpretationVisitor.GetResultFromExpression(Expression exp)
   at MiaPlaza.ExpressionUtils.Evaluating.ExpressionInterpreter.Interpret(Expression exp)
   --- End of inner exception stack trace ---
   at MiaPlaza.ExpressionUtils.Evaluating.ExpressionInterpreter.Interpret(Expression exp)
   at MiaPlaza.ExpressionUtils.Evaluating.ExpressionInterpreter.MiaPlaza.ExpressionUtils.Evaluating.IExpressionEvaluator.Evaluate(Expression unparametrizedExpression)
   at MiaPlaza.ExpressionUtils.PartialEvaluator.SubtreeEvaluator.Visit(Expression exp)).Invoke()```

Do not use Exceptions for program flow

E.g. in ParameterSubstituter exceptions are used for the program flow. This is in general considered bad practice and especially annoying when debugging since those exceptions will result in a context switch which is very expensive (slow).

New release

@Khazuar can you add more people on nuget to be maintainers of this so that we could upload updates there?

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