https://svn.boost.org/trac10/ticket/11886 <p> type_traits/detail/template_arity_spec.hpp says that it's deprecated but is still included in several places, mostly in function_types: </p> <p> grep -nr template_arity_spec.hpp . ./function_types/result_type.hpp:16:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./function_types/components.hpp:18:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./function_types/is_function_pointer.hpp:13:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./function_types/member_function_pointer.hpp:13:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./function_types/function_reference.hpp:13:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./function_types/function_arity.hpp:16:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./function_types/parameter_types.hpp:16:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./function_types/member_object_pointer.hpp:13:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./function_types/is_member_object_pointer.hpp:13:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./function_types/is_function.hpp:12:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./function_types/is_callable_builtin.hpp:13:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./function_types/is_member_pointer.hpp:12:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./function_types/function_pointer.hpp:13:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./function_types/is_nonmember_callable_builtin.hpp:13:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./function_types/is_member_function_pointer.hpp:13:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./function_types/is_function_reference.hpp:13:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./iostreams/detail/is_dereferenceable.hpp:13:# include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./type_traits/detail/bool_trait_def.hpp:21:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./type_traits/detail/size_t_trait_def.hpp:14:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./type_traits/detail/type_trait_def.hpp:14:#include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; ./detail/is_incrementable.hpp:7:# include &lt;boost/type_traits/detail/template_arity_spec.hpp&gt; </p> en-us /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/11886 Trac 1.4.3 Braden McDaniel <braden@…> Wed, 10 Feb 2016 12:14:06 GMT https://svn.boost.org/trac10/ticket/11886#comment:1 https://svn.boost.org/trac10/ticket/11886#comment:1 <ul> <li><strong>cc</strong> <span class="trac-author">braden@…</span> added </li> </ul> Ticket akim.demaille@… Mon, 19 Sep 2016 07:55:24 GMT