[DEV] add v1.76.0

libs/hana/example/tutorial/integral.cpp

@@ -23,6 +23,7 @@
 namespace hana = boost::hana;
 
 
+namespace support {
 template <typename T, typename = std::enable_if_t<
   !hana::Constant<T>::value
 >>
@@ -44,6 +45,7 @@ template <typename T, typename = std::enable_if_t<
 constexpr auto sqrt(T const&) {
   return hana::integral_c<typename T::value_type, sqrt(T::value)>;
 }
+} // end namespace support
 
 
 namespace then {
@@ -51,7 +53,7 @@ namespace mpl = boost::mpl;
 
 template <typename N>
 struct sqrt
-  : mpl::integral_c<typename N::value_type, ::sqrt(N::value)>
+  : mpl::integral_c<typename N::value_type, support::sqrt(N::value)>
 { };
 
 template <typename X, typename Y>
@@ -96,6 +98,8 @@ struct _point {
 template <typename X, typename Y>
 constexpr _point<X, Y> point(X x, Y y) { return {x, y}; }
 
+using support::sqrt; // avoid conflicts with ::sqrt
+
 //! [distance-hana]
 template <typename P1, typename P2>
 constexpr auto distance(P1 p1, P2 p2) {

libs/hana/example/tutorial/introspection.cpp

@@ -139,3 +139,20 @@ BOOST_HANA_CONSTANT_CHECK(has_member(hana::type_c<Foo>));
 BOOST_HANA_CONSTANT_CHECK(!has_member(hana::type_c<Bar>));
 //! [nested_template]
 }
+
+namespace template_specialization {
+//! [template_specialization]
+template <typename T, typename U>
+struct Foo;
+
+template <typename T>
+struct Bar;
+
+auto is_binary_template = hana::is_valid([](auto trait) -> decltype(
+  trait(hana::type_c<void>, hana::type_c<void>)
+) { });
+
+BOOST_HANA_CONSTANT_CHECK(is_binary_template(hana::template_<Foo>));
+BOOST_HANA_CONSTANT_CHECK(!is_binary_template(hana::template_<Bar>));
+//! [template_specialization]
+}