IL查看泛型

查看泛型的IL

我们在开发中经常用到泛型，下面一起通过IL来查看泛型背后做了那些工作

示例代码

示例代码如下：

using@H_404_12@ System;

{

    public@H_404_12@ class@H_404_12@ GenericExample

    {

        static@H_404_12@ T GetT<T>(T value@H_404_12@)

        {

            return@H_404_12@ value@H_404_12@;

        }

int@H_404_12@ a = GetT(3);

404_12@);

            Console.WriteLine("value1:{0}\t Value2:{1}"@H_404_12@,a,str);

    }

}

 

IL查看

通过这可以看到泛型在解释时，也会生成一个新的Class GetT(!!T):!!T

IL代码如下

.method public@H_404_12@ hidebysig static@H_404_12@

string@H_404_12@[] args

    ) cil managed 

// Code size 38 (0x26)@H_404_12@

    .maxstack 3

    .entrypoint

    .locals init (

        [0] int32 a,

        [1] string@H_404_12@ str

    )

    IL_0000: nop

    IL_0001: ldc.i4.3

    IL_0002: call !!0 MyCollection.GenericExample::GetT<int32>(!!0)

    IL_0007: stloc.0

    IL_0008: ldstr "I'am String"@H_404_12@

    IL_000d: call !!0 MyCollection.GenericExample::GetT<string@H_404_12@>(!!0)

    IL_0012: stloc.1

    IL_0013: ldstr "value1:{0}\t Value2:{1}"@H_404_12@

    IL_0018: ldloc.0

    IL_0019: Box [mscorlib]system.int32

    IL_001e: ldloc.1

    IL_001f: call void@H_404_12@ [mscorlib]System.Console::WriteLine(string@H_404_12@,object@H_404_12@,1)">object@H_404_12@)

    IL_0024: nop

    IL_0025: ret

} // end of method GenericExample::Main

泛型在运行时自动转换

通过上面的IL代码可知：泛型在运行时会自动转化类型