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yield return Il代码讲解
本文主要是介绍yield return Il代码讲解，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！
.class nested private auto ansi sealed beforefieldinit '<GetEnumerator>d__12'
extends [System.Runtime]System.Object
implements class [System.Runtime]System.Collections.Generic.IEnumerator`1<object>,
[System.Runtime]System.Collections.IEnumerator,
[System.Runtime]System.IDisposable
//这个位置相当于以上等于 private class sealed <GetEnumerator>d__12：object，IEnumerator，IEnumerator，IDisposable
// nested ：嵌套
//implements ：实现接口
//extends：是继承父类，只要那个类不是声明为final或者那个类定义为abstract的就能继承，
{
.custom instance void [System.Runtime]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = (
01 00 00 00
)
// Fields 字段
.field private int32 '<>1__state'
.field private object '<>2__current'
.field public class School.ClassOfStudent '<>4__this'
.field private int32 '<index>5__1'
// Methods
//
.method public hidebysig specialname rtspecialname
instance void .ctor (
int32 '<>1__state'
) cil managed
//cil managed:托管代码
{
.custom instance void [System.Runtime]System.Diagnostics.DebuggerHiddenAttribute::.ctor() = (
01 00 00 00
)
// Method begins at RVA 0x2369
// Code size 15 (0xf)
.maxstack 8
// {
IL_0000: ldarg.0
// (no C# code)
IL_0001: call instance void [System.Runtime]System.Object::.ctor()
// this.<>1__state = <>1__state;
IL_0006: nop
IL_0007: ldarg.0
IL_0008: ldarg.1
IL_0009: stfld int32 School.ClassOfStudent/'<GetEnumerator>d__12'::'<>1__state'
// }
IL_000e: ret
} // end of method '<GetEnumerator>d__12'::.ctor
.method private final hidebysig newslot virtual
instance void System.IDisposable.Dispose () cil managed
{
.custom instance void [System.Runtime]System.Diagnostics.DebuggerHiddenAttribute::.ctor() = (
01 00 00 00
)
.override method instance void [System.Runtime]System.IDisposable::Dispose()
// Method begins at RVA 0x2379
// Code size 1 (0x1)
.maxstack 8
// }
IL_0000: ret
} // end of method '<GetEnumerator>d__12'::System.IDisposable.Dispose
.method private final hidebysig newslot virtual
instance bool MoveNext () cil managed
{
.override method instance bool [System.Runtime]System.Collections.IEnumerator::MoveNext()
// Method begins at RVA 0x237c
// Code size 133 (0x85)
.maxstack 3
.locals init (
[0] int32,
[1] int32,
[2] bool
)
// switch (<>1__state)
IL_0000: ldarg.0
IL_0001: ldfld int32 School.ClassOfStudent/'<GetEnumerator>d__12'::'<>1__state'
IL_0006: stloc.0
// (no C# code)
IL_0007: ldloc.0
IL_0008: brfalse.s IL_0012
IL_000a: br.s IL_000c
IL_000c: ldloc.0
IL_000d: ldc.i4.1
IL_000e: beq.s IL_0014
IL_0010: br.s IL_0016
IL_0012: br.s IL_0018
// return false;
IL_0014: br.s IL_004f
IL_0016: ldc.i4.0
IL_0017: ret
// <>1__state = -1;
IL_0018: ldarg.0
IL_0019: ldc.i4.m1
IL_001a: stfld int32 School.ClassOfStudent/'<GetEnumerator>d__12'::'<>1__state'
// <index>5__1 = 0;
IL_001f: nop
IL_0020: ldarg.0
IL_0021: ldc.i4.0
IL_0022: stfld int32 School.ClassOfStudent/'<GetEnumerator>d__12'::'<index>5__1'
// break;
IL_0027: br.s IL_0067
// <>2__current = <>4__this.students[<index>5__1];
IL_0029: nop
IL_002a: ldarg.0
IL_002b: ldarg.0
IL_002c: ldfld class School.ClassOfStudent School.ClassOfStudent/'<GetEnumerator>d__12'::'<>4__this'
IL_0031: ldfld class [System.Collections]System.Collections.Generic.List`1<class School.Student> School.ClassOfStudent::students
IL_0036: ldarg.0
IL_0037: ldfld int32 School.ClassOfStudent/'<GetEnumerator>d__12'::'<index>5__1'
IL_003c: callvirt instance !0 class [System.Collections]System.Collections.Generic.List`1<class School.Student>::get_Item(int32)
IL_0041: stfld object School.ClassOfStudent/'<GetEnumerator>d__12'::'<>2__current'
// <>1__state = 1;
IL_0046: ldarg.0
IL_0047: ldc.i4.1
IL_0048: stfld int32 School.ClassOfStudent/'<GetEnumerator>d__12'::'<>1__state'
// return true;
IL_004d: ldc.i4.1
IL_004e: ret
// <>1__state = -1;
IL_004f: ldarg.0
IL_0050: ldc.i4.m1
IL_0051: stfld int32 School.ClassOfStudent/'<GetEnumerator>d__12'::'<>1__state'
// <index>5__1++;
IL_0056: nop
IL_0057: ldarg.0
IL_0058: ldfld int32 School.ClassOfStudent/'<GetEnumerator>d__12'::'<index>5__1'
IL_005d: stloc.1
// if (<index>5__1 < <>4__this.students.Count)
IL_005e: ldarg.0
IL_005f: ldloc.1
IL_0060: ldc.i4.1
IL_0061: add
IL_0062: stfld int32 School.ClassOfStudent/'<GetEnumerator>d__12'::'<index>5__1'
IL_0067: ldarg.0
IL_0068: ldfld int32 School.ClassOfStudent/'<GetEnumerator>d__12'::'<index>5__1'
IL_006d: ldarg.0
IL_006e: ldfld class School.ClassOfStudent School.ClassOfStudent/'<GetEnumerator>d__12'::'<>4__this'
IL_0073: ldfld class [System.Collections]System.Collections.Generic.List`1<class School.Student> School.ClassOfStudent::students
IL_0078: callvirt instance int32 class [System.Collections]System.Collections.Generic.List`1<class School.Student>::get_Count()
IL_007d: clt
IL_007f: stloc.2
IL_0080: ldloc.2
IL_0081: brtrue.s IL_0029
// return false;
IL_0083: ldc.i4.0
IL_0084: ret
} // end of method '<GetEnumerator>d__12'::MoveNext
.method private final hidebysig specialname newslot virtual
instance object 'System.Collections.Generic.IEnumerator<System.Object>.get_Current' () cil managed
{
.custom instance void [System.Runtime]System.Diagnostics.DebuggerHiddenAttribute::.ctor() = (
01 00 00 00
)
.override method instance !0 class [System.Runtime]System.Collections.Generic.IEnumerator`1<object>::get_Current()
// Method begins at RVA 0x240d
// Code size 7 (0x7)
.maxstack 8
// return <>2__current;
IL_0000: ldarg.0
IL_0001: ldfld object School.ClassOfStudent/'<GetEnumerator>d__12'::'<>2__current'
IL_0006: ret
} // end of method '<GetEnumerator>d__12'::'System.Collections.Generic.IEnumerator<System.Object>.get_Current'
.method private final hidebysig newslot virtual
instance void System.Collections.IEnumerator.Reset () cil managed
{
.custom instance void [System.Runtime]System.Diagnostics.DebuggerHiddenAttribute::.ctor() = (
01 00 00 00
)
.override method instance void [System.Runtime]System.Collections.IEnumerator::Reset()
// Method begins at RVA 0x2415
// Code size 6 (0x6)
.maxstack 8
// throw new NotSupportedException();
IL_0000: newobj instance void [System.Runtime]System.NotSupportedException::.ctor()
IL_0005: throw
} // end of method '<GetEnumerator>d__12'::System.Collections.IEnumerator.Reset
.method private final hidebysig specialname newslot virtual
instance object System.Collections.IEnumerator.get_Current () cil managed
{
.custom instance void [System.Runtime]System.Diagnostics.DebuggerHiddenAttribute::.ctor() = (
01 00 00 00
)
.override method instance object [System.Runtime]System.Collections.IEnumerator::get_Current()
// Method begins at RVA 0x241c
// Code size 7 (0x7)
.maxstack 8
// return <>2__current;
IL_0000: ldarg.0
IL_0001: ldfld object School.ClassOfStudent/'<GetEnumerator>d__12'::'<>2__current'
IL_0006: ret
} // end of method '<GetEnumerator>d__12'::System.Collections.IEnumerator.get_Current
// Properties
.property instance object 'System.Collections.Generic.IEnumerator<System.Object>.Current'()
{
.get instance object School.ClassOfStudent/'<GetEnumerator>d__12'::'System.Collections.Generic.IEnumerator<System.Object>.get_Current'()
}
.property instance object System.Collections.IEnumerator.Current()
{
.get instance object School.ClassOfStudent/'<GetEnumerator>d__12'::System.Collections.IEnumerator.get_Current()
}
} // end of class <GetEnumerator>d__12
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