How is the assignment itself implemented in terms of MethodHandles? What do you have to work with?
What I'm thinking is that you could implement the side-effect as part of a MethodHandles#filterArguments call (one that doesn't actually change the argument)? Just wrap that around a MethodHandles#identity call. Won't that do it for you? If you have the assignment implementation, but it returns null/void/whatever, then use MethodHandles#foldArguments to insert a second copy in front, and have the assignment be the map to the right. I think that'll work. ~~ Robert. On Fri, Jun 10, 2011 at 6:10 PM, Charles Oliver Nutter <head...@headius.com> wrote: > I have a case in JRuby where I need to return one of the incoming > arguments as the result of the call, and I can't figure out how to do > it with MethodHandle alone. > > Basically, any Ruby code that looks like this: > > a.foo = 'bar' > > ...or this: > > a[1] = 'bar' > > ...needs to return the RHS, not the result of the assignment call. > Without invokedynamic I do this by passing my call site cache into > another method that does the call and then just returns the RHS rather > than the result of the call. I'm trying to formulate a set of > MethodHandle transforms that will do the same thing without me > introducing a piece of generalized Java code into the call path. > > I'd also like to avoid storing the RHS off into a temporary local > variable, but I'll do that before I'll break inlining for the call > itself by putting a piece of Java code in the call path. > > Thoughts? > > - Charlie > > -- > You received this message because you are subscribed to the Google Groups > "JVM Languages" group. > To post to this group, send email to jvm-languages@googlegroups.com. > To unsubscribe from this group, send email to > jvm-languages+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/jvm-languages?hl=en. > > -- You received this message because you are subscribed to the Google Groups "JVM Languages" group. To post to this group, send email to jvm-languages@googlegroups.com. To unsubscribe from this group, send email to jvm-languages+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/jvm-languages?hl=en.
