C#特性-迭代器(上)及一些研究过程中的副产品

L_001f: pop L_0020: ldloc.0

L_0021: ldc.i4.3 L_0022: box int32

L_0027: callvirt instance int32 [mscorlib]System.Collections.ArrayList::Add(object) L_002c: pop

L_002d: ldloc.0 L_002e: callvirt instance class [mscorlib]System.Collections.IEnumerator [mscorlib]System.Collections.ArrayList::GetEnumerator()

L_0033: stloc.2 L_0034: br.s L_0048

L_0036: ldloc.2 L_0037: callvirt instance object [mscorlib]System.Collections.IEnumerator::get_Current()

L_003c: stloc.1 L_003d: ldloc.1

L_003e: callvirt instance string [mscorlib]System.Object::ToString() L_0043: call void [mscorlib]System.Console::WriteLine(string)

L_0048: ldloc.2 L_0049: callvirt instance bool [mscorlib]System.Collections.IEnumerator::MoveNext()

L_004e: brtrue.s L_0036 L_0050: leave.s L_0063

L_0052: ldloc.2 L_0053: isinst [mscorlib]System.IDisposable

L_0058: stloc.3 L_0059: ldloc.3

L_005a: brfalse.s L_0062 L_005c: ldloc.3

L_005d: callvirt instance void [mscorlib]System.IDisposable::Dispose() L_0062: endfinally

L_0063: call string [mscorlib]System.Console::ReadLine() L_0068: pop

L_0069: ret .try L_0034 to L_0052 finally handler L_0052 to L_0063

} ?

从.locals init 那里可以看出编译器为我们添加了两个局部变量，一个就是迭代器。

复制代码
L_002d: ldloc.0
L_002e: callvirt instance class [mscorlib]System.Collections.IEnumerator [mscorlib]System.Collections.ArrayList::GetEnumerator()