protected override void EmitWrite(ProtoBuf.Compiler.CompilerContext ctx, ProtoBuf.Compiler.Local valueFrom)
{
using (Compiler.Local list = ctx.GetLocalWithValue(ExpectedType, valueFrom))
{
MethodInfo moveNext, current, getEnumerator = GetEnumeratorInfo(ctx.Model, out moveNext, out current);
Helpers.DebugAssert(moveNext != null);
Helpers.DebugAssert(current != null);
Helpers.DebugAssert(getEnumerator != null);
Type enumeratorType = getEnumerator.ReturnType;
bool writePacked = WritePacked;
using (Compiler.Local iter = new Compiler.Local(ctx, enumeratorType))
using (Compiler.Local token = writePacked ? new Compiler.Local(ctx, ctx.MapType(typeof(SubItemToken))) : null)
{
if (writePacked)
{
ctx.LoadValue(fieldNumber);
ctx.LoadValue((int)WireType.String);
ctx.LoadReaderWriter();
ctx.EmitCall(ctx.MapType(typeof(ProtoWriter)).GetMethod("WriteFieldHeader"));
ctx.LoadValue(list);
ctx.LoadReaderWriter();
ctx.EmitCall(ctx.MapType(typeof(ProtoWriter)).GetMethod("StartSubItem"));
ctx.StoreValue(token);
ctx.LoadValue(fieldNumber);
ctx.LoadReaderWriter();
ctx.EmitCall(ctx.MapType(typeof(ProtoWriter)).GetMethod("SetPackedField"));
}
ctx.LoadAddress(list, ExpectedType);
ctx.EmitCall(getEnumerator);
ctx.StoreValue(iter);
using (ctx.Using(iter))
{
Compiler.CodeLabel body = ctx.DefineLabel(), next = ctx.DefineLabel();
ctx.Branch(next, false);
ctx.MarkLabel(body);
ctx.LoadAddress(iter, enumeratorType);
ctx.EmitCall(current);
Type itemType = Tail.ExpectedType;
if (itemType != ctx.MapType(typeof(object)) && current.ReturnType == ctx.MapType(typeof(object)))
{
ctx.CastFromObject(itemType);
}
Tail.EmitWrite(ctx, null);
ctx.MarkLabel(@next);
ctx.LoadAddress(iter, enumeratorType);
ctx.EmitCall(moveNext);
ctx.BranchIfTrue(body, false);
}
if (writePacked)
{
ctx.LoadValue(token);
ctx.LoadReaderWriter();
ctx.EmitCall(ctx.MapType(typeof(ProtoWriter)).GetMethod("EndSubItem"));
}
}
}
}
