Generalizing identity_property_map for arbitrary types

[Noel Belcourt]

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 _ Unsubscribe & other changes: ​http://lists.boost.org/mailman/listinfo.cgi/boost

[Jeremiah Willcock]

(In [58246]) Applied patch from #3739; fixes #3739