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A brief discussion on the comparison of simple types of expression tree expression tree demo

A brief discussion on the comparison of simple types of expression tree expression tree demo

Updated: February 15, 2017 11:25:58 Submission: jingxian
Below, the editor will bring you a brief discussion on the simple type comparison of c# expression tree Expression. The editor thinks it is quite good, so I will share it with you now and give you a reference. Let's take a look with the editor

Examples are as follows:

using System;
using ;

class DynamicPredicate
{
  public static Expression<Func<T, T, bool>> Generate<T>(string op)
  {
    ParameterExpression x = (typeof(T), "x");
    ParameterExpression y = (typeof(T), "y");
    return <Func<T, T, bool>>
    (
      ((">")) ? (x, y) :
        (("<")) ? (x, y) :
          ((">=")) ? (x, y) :
            (("<=")) ? (x, y) :
              (("!=")) ? (x, y) :
                (x, y),
      x,
      y
    );
  }
}

static void Main()
  {
    string op = ">=";
    var integerPredicate = <int>(op).Compile();
    var floatPredicate = <float>(op).Compile();

    int iA = 12, iB = 4;
    ("{0} {1} {2} : {3}",
              iA, op, iB, integerPredicate(iA, iB));

    float fA = 867.0f, fB = 867.0f;
    ("{0} {1} {2} : {3}",
              fA, op, fB, floatPredicate(fA, fB));

    ("{0} {1} {2} : {3}",
              fA, ">", fB, <float>(">").Compile()(fA, fB));

    ();
  }

The above article briefly discusses the simple type comparison of c# expression tree Expression is all the content I have shared with you. I hope you can give you a reference and I hope you can support me more.

  • expression
  • Expression tree
  • c#

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