On Dec 16, 3:51 am, Meikel Brandmeyer <m...@kotka.de> wrote: > Hi, > > Am 16.12.2011 um 01:58 schrieb Cedric Greevey: > > > I know that every fn is a class; I am questioning the very need for > > "prim interfaces". > > If you don't have an interface, you can't redef the function at runtime. > Since the class of the function changes, you'll have the call sites wired to > the wrong class. Hence you have to recompile the call sites. For a macro this > is to be expected, but for a function... With method handles we could emulate Factor's solution to this problem. Every function class has a static collection of call sites it is installed in so when the function is superseded by a new version all of those call sites can be invalidated appropriately. Of course this approach would introduce a dependency on Java 7, increase memory usage, and still not solve the higher-order use case.
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