Re: [boost] [property-map] Generalizing identity_property_map for arbitrary types

Subject: Re: [boost] [property-map] Generalizing identity_property_map for arbitrary types
From: Jeremiah Willcock (jewillco_at_[hidden])
Date: 2009-12-08 22:46:15

On Tue, 8 Dec 2009, Belcourt, Kenneth wrote:

>
> On Dec 8, 2009, at 3:57 PM, Jeremiah Willcock wrote:
>
>> On Tue, 8 Dec 2009, Belcourt, Kenneth wrote:
>> 
>>> 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.
>> 
>> I don't see a patch attached to your email.  Could you please file a
>> feature request on Trac for property_map?  Thank you.
>
> https://svn.boost.org/trac/boost/ticket/3739
>
> -- Noel

This is applied in r58246.  Thank you for your patch.

-- Jeremiah Willcock