On Feb 4, 2016, at 05:03 , Charles Jenkins <[email protected]> wrote:
>
> am I tilting at a windmill?
The problem is that the protocol in unspecific as to what kind of types it can
be applied to, and your intentions don’t work if the type is a struct**. In
fact, you only apply it to classes (Fluent.Sequence and Fluent.Group). So, you
can fix the errors by saying that it’s a class-only protocol:
> protocol SKActionCollection: class {
and eliminating the ‘mutating’ keywords.
** Because structs constructed in a expression are literals and can’t be
mutated even if they have mutating methods. That why ‘(a + a)++’ doesn’t
compile, even if ‘a’ is a mutable variable.
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