Implement allocate_unique

test/allocate_unique_array_throws_test.cpp

@@ -0,0 +1,132 @@
+/*
+Copyright 2019 Glen Joseph Fernandes
+(glenjofe@gmail.com)
+
+Distributed under the Boost Software License, Version 1.0.
+(http://www.boost.org/LICENSE_1_0.txt)
+*/
+#include <boost/config.hpp>
+#if (!defined(BOOST_LIBSTDCXX_VERSION) || \
+    BOOST_LIBSTDCXX_VERSION >= 48000) && \
+    !defined(BOOST_NO_CXX11_SMART_PTR)
+#include <boost/core/lightweight_test.hpp>
+#include <boost/smart_ptr/allocate_unique.hpp>
+
+template<class T = void>
+struct creator {
+    typedef T value_type;
+    typedef T* pointer;
+
+    template<class U>
+    struct rebind {
+        typedef creator<U> other;
+    };
+
+    creator() { }
+
+    template<class U>
+    creator(const creator<U>&) { }
+
+    T* allocate(std::size_t size) {
+        return static_cast<T*>(::operator new(sizeof(T) * size));
+    }
+
+    void deallocate(T* ptr, std::size_t) {
+        ::operator delete(ptr);
+    }
+};
+
+template<class T, class U>
+inline bool
+operator==(const creator<T>&, const creator<U>&)
+{
+    return true;
+}
+
+template<class T, class U>
+inline bool
+operator!=(const creator<T>&, const creator<U>&)
+{
+    return false;
+}
+
+class type {
+public:
+    static unsigned instances;
+
+    type() {
+        if (instances == 5) {
+            throw true;
+        }
+        ++instances;
+    }
+
+    ~type() {
+        --instances;
+    }
+
+private:
+    type(const type&);
+    type& operator=(const type&);
+};
+
+unsigned type::instances = 0;
+
+int main()
+{
+    try {
+        boost::allocate_unique<type[]>(creator<type>(), 6);
+        BOOST_ERROR("allocate_unique did not throw");
+    } catch (...) {
+        BOOST_TEST(type::instances == 0);
+    }
+    try {
+        boost::allocate_unique<type[][2]>(creator<type>(), 3);
+        BOOST_ERROR("allocate_unique did not throw");
+    } catch (...) {
+        BOOST_TEST(type::instances == 0);
+    }
+    try {
+        boost::allocate_unique<type[6]>(creator<>());
+        BOOST_ERROR("allocate_unique did not throw");
+    } catch (...) {
+        BOOST_TEST(type::instances == 0);
+    }
+    try {
+        boost::allocate_unique<type[3][2]>(creator<>());
+        BOOST_ERROR("allocate_unique did not throw");
+    } catch (...) {
+        BOOST_TEST(type::instances == 0);
+    }
+    try {
+        boost::allocate_unique_noinit<type[]>(creator<>(), 6);
+        BOOST_ERROR("allocate_unique_noinit did not throw");
+    } catch (...) {
+        BOOST_TEST(type::instances == 0);
+    }
+    try {
+        boost::allocate_unique_noinit<type[][2]>(creator<>(), 3);
+        BOOST_ERROR("allocate_unique_noinit did not throw");
+    } catch (...) {
+        BOOST_TEST(type::instances == 0);
+    }
+    try {
+        boost::allocate_unique_noinit<type[6]>(creator<>());
+        BOOST_ERROR("allocate_unique_noinit did not throw");
+    } catch (...) {
+        BOOST_TEST(type::instances == 0);
+    }
+    try {
+        boost::allocate_unique_noinit<type[3][2]>(creator<>());
+        BOOST_ERROR("allocate_unique_noinit did not throw");
+    } catch (...) {
+        BOOST_TEST(type::instances == 0);
+    }
+    return boost::report_errors();
+}
+#else
+int main()
+{
+    return 0;
+}
+#endif