Yeah, returning a tied value is what I was grudgingly working on, as I didn't think it would be very efficient.

I was hoping I could return a non-tied value for rvalue context as 'reading' a var is often a more frequent operation than 'writing' to it.

I've used lvalues for many functions, where I don't need to check the value, but do want assignments to structures to be checked for valid member names. I use structures more often than objects, which is why I shook my head at the discouragement against lvalue accessor subs.

Of course if you want to do something contingent on value change...then it seems perl only offers a tied-type solution.

It's too bad a "wantlvalue" keyword wasn't introduced with lvalue subs -- it would have been at least as useful as 'wantarray'. Imagine all the dual-use functions that return different values based on scalar or array context that would not be do-able w/o knowing return context. It seems that's an equivalent case to knowing whether or not the return context is lvalue or not.

In reply to Re^2: can sub check context for lvalue vs rvalue context? by perl-diddler
in thread can sub check context for lvalue vs rvalue context? by perl-diddler

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