[boost] Patch: function/lambda compatibility

From: Michael Hohmuth (hohmuth_at_[hidden])
Date: 2002-11-04 11:19:26

The following patch (in attachment 1) adds a "struct sig" to Boost's
function<> template, allowing it to be used in bind expressions like
this:

  function <unsigned(bool, double)> f1 = bind (func_impl, 15, _1, _2);
  function <unsigned(double)>       f2 = bind (f1, false, _1);
  function <unsigned()>             f3 = bind (f2, 4.0);

(A full test program is in attachment 2.)

Without the patch, the second bind would fail.

Regards,
Michael
-- 
hohmuth_at_[hidden]
http://home.pages.de/~hohmuth/