add weak table implementation

* libguile/weak-table.c:
* libguile/weak-table.h: New files, implementing open-addressed weak
  hash tables, similar to the implementation of weak sets.  This will
  let us remove weak pairs.

* libguile.h:
* libguile/Makefile.am:
* libguile/evalext.c:
* libguile/gc.c:
* libguile/init.c:
* libguile/print.c:
* libguile/tags.h: Update all the pieces for the new files and tc7.
This commit is contained in:
Andy Wingo 2011-10-23 23:23:47 +02:00
commit 7005c60fcb
9 changed files with 1146 additions and 1 deletions

1050
libguile/weak-table.c Normal file

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