implement procedure-callers
authorAndy Wingo <wingo@pobox.com>
Tue, 17 Mar 2009 23:44:26 +0000 (00:44 +0100)
committerAndy Wingo <wingo@pobox.com>
Tue, 17 Mar 2009 23:44:26 +0000 (00:44 +0100)
commitb190790255a44ae848b2ee3b313ae5da084e3cff
tree38885666fe7cade55fb7502341bf92f0bfcc75a0
parent4f96d42b2d7a3d135f061c7096a8d6ff49881b62
implement procedure-callers

* module/system/xref.scm: Implement procedure-callers, as the inverse of
  procedure-callees, with a cache invalidated by changes in modules.

* module/ice-9/boot-9.scm (module-use!): Don't poke module observers when
  module-use! is called for an already-used module.
module/ice-9/boot-9.scm
module/system/xref.scm