* Fix compiler failures showing up on regression test matrix due to void return type.
* Fix gcc-3.4 failures showing up regression test matrix due to binding string literals to non-const references to char const*.
* Update tutorial documentation to match literate tests.
<boost/parameter/aux_/arg_list.hpp>
* Use parameter::value_type vice mpl::find.
"test/compose.cpp"
* Test that mpl::has_key evaluates to mpl::false_ for keyword tags that are not in parameter::aux::arg_list.
"test/singular.cpp"
* Test that mpl::has_key evaluates to mpl::false_ for keyword tags that are not in parameter::aux::tagged_argument or parameter::aux::tagged_argument_rref.
Also move BOOST_PARAMETER_TEMPLATE_KEYWORD macro definition to <boost/parameter/template_keyword.hpp>, but #include this new header file in <boost/parameter/name.hpp> for backward compatibility.
<boost/parameter/aux_/template_keyword.hpp>
* Apply a modified version of David Abrahams' patch from <https://svn.boost.org/trac10/ticket/2793> which eliminates the need to wrap function types in boost::function or std::function instantiations.
"test/function_type_tpl_param.cpp"
* Demonstrate that keyword types generated by BOOST_PARAMETER_TEMPLATE_KEYWORD now store function types as-is without wrapping them in boost::function or std::function instantiations.
"doc/reference.rst"
"doc/html/reference.html"
* Add BOOST_PARAMETER_DISABLE_PERFECT_FORWARDING as a configuration macro.
* Mention by what libraries other macros which are not a part of Parameter itself are defined.
* Mention which non-Boost.Parameter macros can be altered to affect the Boost.Parameter configuration.
User library tests have been reporting numerous failures due to internal compiler errors that occur when perfect forwarding is unsupported. Setting BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY to zero eliminates these failures. By doing this in Boost.Parameter, we relieve user code of the burden of doing this in their end. The trade-off is that our own tests need to define BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY explicitly in order to take advantage of the benefits of not having to wrap boost::ref() or std::ref() around non-const lvalues. As this was always a C++03 workaround, the change should be worth the trade-off.
On an unrelated note, Travis Cl just deprecated "sudo: false". See <https://blog.travis-ci.com/2018-10-04-combining-linux-infrastructures>.
"test/Jamfile.v2"
* Rearrange aliases to enable turning off certain tests when they fail for specific compiler configurations
* Reinstate test-suite statement until an undeprecated version can be found.
".travis.yml"
"appveyor.yml"
* Remove specification of alias names
* Change test/evaluate_category.cpp and test/preprocessor_eval_category.cpp so that the tests pass for msvc-8.0, msvc-9.0, msvc-10.0, and msvc-11.0.
* Change test/Jamfile.v2 so that the compose_fail test runs only for msvc-11.0.
* Ensure that file permissions for header and source files do not include execute.
Upon approval and merging of this commit, replace the definition of BOOST_PARAMETER_NESTED_KEYWORD in <boost/accumulators/accumulators_fwd.hpp> with #include <boost/parameter/nested_keyword.hpp>.
Also upgrade boost::parameter::aux::arg_list, boost::parameter::aux::tagged_argument, and boost::parameter::aux::tagged_argument_rref to model the MPL Associative Sequence concept.
