void EndMulti(ILGenerator il)
{
Debug.Assert(il != null);
Debug.Assert(ArgsCount > 2);
il_EmitSaveElem(il);
for (int i = 0, j = ArgsCount - 1; i < ArgsCount; i++, j--)
{
var index = Locals.Pop();
var array = Locals.Pop();
var var = ArgsLocs[j];
// x += xstep;
il.Emit(OpCodes.Ldloc, var);
il.Emit(OpCodes.Ldloc, StepLocs.Pop());
Generic.Operation(il, 1);
il.Emit(OpCodes.Stloc, var);
EmitLoopEnd(il, index, array);
}
}
void BeginMulti(ILGenerator il)
{
Debug.Assert(il != null);
Debug.Assert(ArgsCount > 2);
for (int i = 0; i < ArgsCount; i++)
{
LocalBuilder step =
il.DeclareLocal(TypeHelper <T> .ValueType);
il_EmitLoadArg(il, 1);
il_EmitLoadI4(il, i);
il_EmitLoadElem(il);
il.Emit(OpCodes.Stloc, step);
StepLocs.Push(step);
}
LocalBuilder lastIndex = null;
LocalBuilder lastArray = null;
for (int i = 0, t = ArgsCount; i < ArgsCount; i++, t--)
{
Type arrayType = TypeHelper <T> .GetArrayType(t);
var array = il.DeclareLocal(arrayType);
var index = il.DeclareLocal(IndexType);
var var = il.DeclareLocal(TypeHelper <T> .ValueType);
if (i == 0)
{
// a = (T[][][]) ar;
il_EmitLoadArg(il, 0);
il.Emit(OpCodes.Castclass, arrayType);
il.Emit(OpCodes.Stloc, array);
}
else
{
Debug.Assert(lastArray != null);
Debug.Assert(lastIndex != null);
// T[] b = a[i];
il.Emit(OpCodes.Ldloc, lastArray);
il.Emit(OpCodes.Ldloc, lastIndex);
il.Emit(OpCodes.Ldelem_Ref);
il.Emit(OpCodes.Stloc, array);
}
// T x = begins[0];
il_EmitLoadArg(il, 1);
il_EmitLoadI4(il, i + ArgsCount);
il_EmitLoadElem(il);
il.Emit(OpCodes.Stloc, var);
// i++;
il.Emit(OpCodes.Ldc_I4_0);
il.Emit(OpCodes.Stloc, index);
EmitLoopBegin(il);
ArgsLocs.Add(var);
Locals.Push(array);
Locals.Push(index);
lastArray = array;
lastIndex = index;
}
Debug.Assert(lastIndex != null);
Debug.Assert(lastArray != null);
// c[z] =
il.Emit(OpCodes.Ldloc, lastArray);
il.Emit(OpCodes.Ldloc, lastIndex);
il_EmitLoadAdress(il);
}