Merge commit '4ebe6417a5fce5f0994fc0c31bebf732be96a07c' as 'boost'

2026-06-18 13:48:43 -04:00 · 2018-06-09 21:48:33 +01:00
parent b5eabc6d6a 4ebe6417a5
commit 5abe797e3c
12444 changed files with 2327021 additions and 0 deletions
@@ -0,0 +1,107 @@
+// Copyright David Abrahams 2003.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+#include <boost/iterator/iterator_adaptor.hpp>
+#include <boost/static_assert.hpp>
+
+#include "static_assert_same.hpp"
+
+#include <boost/iterator/minimum_category.hpp>
+
+struct X { int a; };
+
+
+struct Xiter : boost::iterator_adaptor<Xiter,X*>
+{
+    Xiter();
+    Xiter(X* p) : boost::iterator_adaptor<Xiter, X*>(p) {}
+};
+
+void take_xptr(X*) {}
+void operator_arrow_test()
+{
+    // check that the operator-> result is a pointer for lvalue iterators
+    X x;
+    take_xptr(Xiter(&x).operator->());
+}
+
+template <class T, class U, class Min>
+struct static_assert_min_cat
+  : static_assert_same<
+       typename boost::iterators::minimum_category<T,U>::type, Min
+    >
+{};
+
+void category_test()
+{
+    using namespace boost::iterators;
+    using namespace boost::iterators::detail;
+
+    BOOST_STATIC_ASSERT((
+        !boost::is_convertible<
+            std::input_iterator_tag
+          , input_output_iterator_tag>::value));
+
+    BOOST_STATIC_ASSERT((
+        !boost::is_convertible<
+            std::output_iterator_tag
+          , input_output_iterator_tag>::value));
+
+    BOOST_STATIC_ASSERT((
+        boost::is_convertible<
+            input_output_iterator_tag
+          , std::input_iterator_tag>::value));
+
+    BOOST_STATIC_ASSERT((
+        boost::is_convertible<
+            input_output_iterator_tag
+          , std::output_iterator_tag>::value));
+
+#if 0 // This seems wrong; we're not advertising
+      // input_output_iterator_tag are we?
+    BOOST_STATIC_ASSERT((
+        boost::is_convertible<
+            std::forward_iterator_tag
+          , input_output_iterator_tag>::value));
+#endif
+
+    int test = static_assert_min_cat<
+        std::input_iterator_tag,input_output_iterator_tag, std::input_iterator_tag
+    >::value;
+
+    test = static_assert_min_cat<
+        input_output_iterator_tag,std::input_iterator_tag, std::input_iterator_tag
+    >::value;
+
+#if 0
+    test = static_assert_min_cat<
+        input_output_iterator_tag,std::forward_iterator_tag, input_output_iterator_tag
+    >::value;
+#endif
+
+    test = static_assert_min_cat<
+        std::input_iterator_tag,std::forward_iterator_tag, std::input_iterator_tag
+    >::value;
+
+    test = static_assert_min_cat<
+        std::input_iterator_tag,std::random_access_iterator_tag, std::input_iterator_tag
+    >::value;
+
+#if 0  // This would be wrong: a random access iterator is not
+       // neccessarily writable, as is an output iterator.
+    test = static_assert_min_cat<
+        std::output_iterator_tag,std::random_access_iterator_tag, std::output_iterator_tag
+    >::value;
+#endif
+
+    (void)test;
+}
+
+int main()
+{
+    category_test();
+    operator_arrow_test();
+    return 0;
+}
+