On Sunday, 28 September 2014 at 09:04:42 UTC, Nordlöw wrote:
On Sunday, 28 September 2014 at 08:58:27 UTC, Nordlöw wrote:
In my strive to add msgpacking support for std.container.Array
I've been blocked by the fact that std.container.Array.opIndex
only has one overload which is non-const probably because it
returns a ref T. This doesn't place nicely with serialization.
Shouldn't inout be used here?
Further I've tried tagging all opIndex in array.d with inout as
inout ref T opIndex(size_t i) inout
but then I get another error
array.d(479,30): Error:
cast(string)this._data.refCountedPayload()._payload[i] is not
an lvalue
Probably you want:
ref inout(T) opIndex(size_t i) inout
Instead. What you wrote was basically the same as:
ref T opIndex(size_t i) inout inout
While compiling, the "inout(T)" obtained from "_payload[i]" is
"value-converted" into a "T" (makes it an lvalue), and then the
return (which is "ref") fails.
This is the whole "function attributes on left side confusion" -
fiasco thing...
