id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
3739	Generalizing identity_property_map for arbitrary types	Noel Belcourt	Jeremiah Willcock	"On Tue, 8 Dec 2009, Belcourt, Kenneth wrote:

Hi,

I've found the property map library to be very useful and would like to 
propose a minor enhancement to permit the identity_property_map to work for 
arbitrary types.  The reason for this is that some computationally intensive 
algorithms suffer noticeable performance degradation when I convert them to 
generic algorithms using property maps.  Having a typed identity property map 
that returns, for example, the double passed into it significantly speeds up 
our algorithms, at least for those fields that are not mutable.

I've attached a patch, and could supply a motivating example, if anyone is 
interested.

-- Noel

I don't see a patch attached to your email.  Could you please file a 
feature request on Trac for property_map?  Thank you.

-- Jeremiah Willcock
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"	Feature Requests	closed	Boost 1.42.0	property_map	Boost 1.41.0	Not Applicable	fixed