alfC
Hi,
I decided to try Phoenix3. I looked up at a couple of examples and since I use Boost.Units (which depends on Boost.MPL) heavily I tried to mix both only to find out that there is an obscure incompatibility between MPL and Phoenix3. The way to show this is just to compile the phoenix3/.../function.cpp example
https://svn.boost.org/svn/boost/sandbox/SOC/2010/phoenix3/libs/phoenix/examp... unction.cpp
with the following added line:
#include
I get this error message:
In file included from function.cpp:12: /home/user/usr/include/boost/mpl/multiplies.hpp:38: error: wrong number of template arguments (7, should be 5) /home/user/usr/include/boost/mpl/aux_/preprocessed/gcc/times.hpp:68: error: provided for ‘template
struct boost::mpl::times’
Thanks for the report. I just commited a fix.
The problem is with some macro definitions inside phoenix/core/limits.hpp.
It is the macro documented here:
http://www.boost.org/doc/libs/1_45_0/libs/mpl/doc/refmanual/limit-metafuncti...
arity.html
However, this fix might introduce new problems, whenever the PHOENIX_LIMIT
constant is set too high. The problem lies deep within the use of the
preprocessor in some mpl internal code.
Further investigation is needed!
The problematic code can be tested with for example this code:
// This is needed to generate the mpl code.
#define BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS
// define to something which is not the default:
// (default is 5)
#define BOOST_MPL_LIMIT_METAFUNCTION_ARITY 10
#include
The full code (almost identical to the example) follows -- Thank you, Alfredo
Regards, Thomas