So, you go through all the trouble of cloning the closures and creating the one-off "butted" type. Even if inlined or the compiler otherwise does know the context, it still can't easily figure out that whole methods can be removed.

If the function knew it was called in numeric context, it could return Array but compute_length();. If optimized over, the property contains no closures, so is easily cut down to just the desired function call.

In reply to Re^4: Contexts and Perl 6 by John M. Dlugosz
in thread Contexts and Perl 6 by John M. Dlugosz

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