3
我使用ILGenerator.Emit生成動態類型。我正在生成一個方法體,它將方法參數的類型存儲在一個數組中。爲了實際存儲數組中的元素,我正在遍歷給定方法的參數並構建必要的IL以存儲元素。在第二次迭代中,Break指令出現在Stelem.ref (L_003d以下)指令之後。這經常發生在第二次迭代,我不明白爲什麼。下面是代碼:ILGenerator在將元素存儲在數組中時發出Break指令
ilGenerator.Emit(OpCodes.Ldc_I4, exampleMethod.GetParameters().Length);
ilGenerator.Emit(OpCodes.Newarr, typeof(Type));
ilGenerator.Emit(OpCodes.Stloc, typeArray);
for (int idx = 0; idx < exampleMethod.GetParameters().Length; idx++)
{
ilGenerator.Emit(OpCodes.Ldloc, typeArray);
ilGenerator.Emit(OpCodes.Ldc_I4, idx);
ilGenerator.Emit(OpCodes.Ldarg, idx + 1);
ilGenerator.Emit(OpCodes.Box, typeof(int));
ilGenerator.EmitCall(OpCodes.Callvirt, typeof(object).GetMethod("GetType"), null);
ilGenerator.Emit(OpCodes.Stelem_Ref, idx);//second iteration causes a break to be output in the IL
}
ilGenerator.Emit(OpCodes.Ret);
和IL輸出是這裏
.method public virtual instance int32 Add3(int32, int32, int32) cil managed
{
.maxstack 3
.locals init (
[0] class [mscorlib]System.Type[] typeArray)
L_0000: ldc.i4 3
L_0005: newarr [mscorlib]System.Type
L_000a: stloc.0
L_000b: ldloc.0
L_000c: ldc.i4 0
L_0011: ldarg A_0
L_0015: nop
L_0016: nop
L_0017: box int32
L_001c: callvirt instance class [mscorlib]System.Type [mscorlib]System.Object::GetType()
L_0021: stelem.ref
L_0022: nop
L_0023: nop
L_0024: nop
L_0025: nop
L_0026: ldloc.0
L_0027: ldc.i4 1
L_002c: ldarg A_1
L_0030: nop
L_0031: nop
L_0032: box int32
L_0037: callvirt instance class [mscorlib]System.Type [mscorlib]System.Object::GetType()
L_003c: stelem.ref
**L_003d: break**
L_003e: nop
L_003f: nop
L_0040: nop
L_0041: ldloc.0
L_0042: ldc.i4 2
L_0047: ldarg A_2
L_004b: nop
L_004c: nop
L_004d: box int32
L_0052: callvirt instance class [mscorlib]System.Type [mscorlib]System.Object::GetType()
L_0057: stelem.ref
L_0058: ldarg.0
L_0059: nop
L_005a: nop
L_005b: nop
L_005c: ret
}
任何指針或建議,將不勝感激。
非常感謝
德莫特
非常感謝您的快速回復和解釋,我永遠不會那麼做。無論如何,你做了什麼建議和它的工作。再次歡呼。 – Dermot 2010-11-03 10:36:21