Re: [Boost-users] [Review] Phoenix V3: mini-review starts February 19th

26 Feb 2011

      On Feb 25, 11:57 pm, Thomas Heller  wrote:
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On Saturday, February 26, 2011 08:49:25 AM alfC wrote:
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On Jan 31, 5:43 pm, "Hartmut Kaiser"  wrote:
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Hi List,
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PhoenixV3 is nearing its completion.
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With the port to Boost.Proto we tried to address the outstanding issues
of the review and would like to announce that themini-review will
start on February 19th.
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Thank you for the new version of Phoenix-3. I wonder if things like
phoenix-expression matching is now possible as "promised" in this
thread:
http://lists.boost.org/boost-users/2010/05/59491.php
Yes, stuff like this could be indeed made possible.
Though, I don't see where phoenix comes into the game in the examples in
this thread.
I was doing things like this with Phoenix2 by hacking the internals:

in a function call like this

integral( 'arbitrary phoenix expression'  , interval(2., 4.));

I was matching, first that the passed expresion is of the form #1/
( phoenix::_1 - #2), if so it checked that #2 is a 'double-type'
value, then extracted that value and then passed the whole thing to a
numerical intergrator that handle functions with sigularities at the
value of #2. If the expression didn't match then a generic integrator
is called.

Thanks,
Alfredo