public override void EmitStatement(EmitContext ec)
{
var storey = (AsyncTaskStorey)Storey;
storey.Instance.Emit(ec);
ec.Emit(OpCodes.Call, storey.StateMachineMethod.Spec);
if (storey.Task != null)
{
//
// async.$builder.Task;
//
var pe_task = new PropertyExpr(storey.Task, loc)
{
InstanceExpression = new FieldExpr(storey.Builder, loc)
{
InstanceExpression = storey.Instance
},
Getter = storey.Task.Get
};
pe_task.Emit(ec);
}
ec.Emit(OpCodes.Ret);
}
public override void EmitStatement(EmitContext ec)
{
var storey = (AsyncTaskStorey)Storey;
storey.Instance.Emit(ec);
var move_next_entry = storey.StateMachineMethod.Spec;
if (storey.MemberName.Arity > 0)
{
move_next_entry = MemberCache.GetMember(storey.Instance.Type, move_next_entry);
}
ec.Emit(OpCodes.Call, move_next_entry);
//
// Emits return <async-storey-instance>.$builder.Task;
//
if (storey.Task != null)
{
var builder_field = storey.Builder.Spec;
var task_get = storey.Task.Get;
if (storey.MemberName.Arity > 0)
{
builder_field = MemberCache.GetMember(storey.Instance.Type, builder_field);
task_get = MemberCache.GetMember(builder_field.MemberType, task_get);
}
var pe_task = new PropertyExpr(storey.Task, loc)
{
InstanceExpression = new FieldExpr(builder_field, loc)
{
InstanceExpression = storey.Instance
},
Getter = task_get
};
pe_task.Emit(ec);
}
ec.Emit(OpCodes.Ret);
}
public void EmitInitializer(EmitContext ec)
{
//
// Some predefined types are missing
//
if (builder == null)
{
return;
}
var instance = (TemporaryVariableReference)Instance;
var builder_field = builder.Spec;
if (MemberName.Arity > 0)
{
builder_field = MemberCache.GetMember(instance.Type, builder_field);
}
//
// Inflated factory method when task is of generic type
//
if (builder_factory.DeclaringType.IsGeneric)
{
var task_return_type = return_type.TypeArguments;
var bt = builder_factory.DeclaringType.MakeGenericType(Module, task_return_type);
builder_factory = MemberCache.GetMember(bt, builder_factory);
builder_start = MemberCache.GetMember(bt, builder_start);
}
//
// stateMachine.$builder = AsyncTaskMethodBuilder<{task-type}>.Create();
//
instance.AddressOf(ec, AddressOp.Store);
ec.Emit(OpCodes.Call, builder_factory);
ec.Emit(OpCodes.Stfld, builder_field);
//
// stateMachine.$builder.Start<{storey-type}>(ref stateMachine);
//
instance.AddressOf(ec, AddressOp.Store);
ec.Emit(OpCodes.Ldflda, builder_field);
if (Task != null)
{
ec.Emit(OpCodes.Dup);
}
instance.AddressOf(ec, AddressOp.Store);
ec.Emit(OpCodes.Call, builder_start.MakeGenericMethod(Module, instance.Type));
//
// Emits return stateMachine.$builder.Task;
//
if (Task != null)
{
var task_get = Task.Get;
if (MemberName.Arity > 0)
{
task_get = MemberCache.GetMember(builder_field.MemberType, task_get);
}
var pe_task = new PropertyExpr(Task, Location)
{
InstanceExpression = EmptyExpression.Null, // Comes from the dup above
Getter = task_get
};
pe_task.Emit(ec);
}
}
