Andreas Pokorny <andreas.pokorny@gmx.de> writes:
Hi, GCC-4.1.1 gives me the attached error message while compiling dynamic_image.
It boils down to:
dynamic_image.cpp:14: instantiated from here boost/mpl/aux_/preprocessed/gcc/template_arity.hpp:85: error: call of overloaded 'arity_helper( aux::type_wrapper< .... >,aux::arity_tag<1>)' is ambiguous boost/mpl/aux_/preprocessed/gcc/template_arity.hpp:30: note: candidates are: char (&aux::arity_helper(...))[1] boost/mpl/aux_/preprocessed/gcc/template_arity.hpp:37: note: char (&aux::arity_helper(::aux::type_wrapper<F<T1> >,aux::arity_tag<1>))[2] boost/mpl/aux_/preprocessed/gcc/template_arity.hpp:37: note: char (&aux::arity_helper(::aux::type_wrapper<F<T1> >,aux::arity_tag<1>))[2]
Is this a known mpl<->gcc-4.1.1 issue?
Looks like a clear GCC-4.1.1 bug to me. The error message says the overload on line 37 is ambiguous with itself! That said, if you're trying to use MPL lambda expressions with templates that have 6 or more arguments, I would expect an error here (if a more intelligible one). -- Dave Abrahams Boost Consulting www.boost-consulting.com