r23023 - gnucash/trunk/src/report/report-system - Reports: Add collector functionality for side effects..

[Geert Janssens]

Author: gjanssens
Date: 2013-06-02 06:31:51 -0400 (Sun, 02 Jun 2013)
New Revision: 23023
Trac: http://svn.gnucash.org/trac/changeset/23023

Modified:
   gnucash/trunk/src/report/report-system/collectors.scm
   gnucash/trunk/src/report/report-system/test/test-collectors.scm
Log:
Reports: Add collector functionality for side effects..
function-state->collector; turn a function/initial state into a collector
collector-do: Like collector-map, but only return the result of the first collector.
	It's assumed the other collectors are invoked for their side effects.

Author:    Peter Broadbery <p.broadbery at gmail.com>