create o3tl::array_view

A very basic implementation of the proposed std::array_view, similar to
clang's llvm::ArrayRef.

Mostly cribbed from the string_view implementation :-)

Use it for the SfxDispatcher::setSlotFilter function

Change-Id: Ife7e4971741b41827e145787899872c9b2bea82b
Reviewed-on: https://gerrit.libreoffice.org/38817
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

2 files changed, 80 insertions, 0 deletions

diff --git a/o3tl/CppunitTest_o3tl_tests.mk b/o3tl/CppunitTest_o3tl_tests.mk
index 55c1fee84a20..01a7cc0cbdc5 100644
--- a/o3tl/CppunitTest_o3tl_tests.mk
+++ b/o3tl/CppunitTest_o3tl_tests.mk
@@ -27,6 +27,7 @@ $(eval $(call gb_CppunitTest_use_libraries,o3tl_tests,\
 
 $(eval $(call gb_CppunitTest_add_exception_objects,o3tl_tests,\
 	o3tl/qa/cow_wrapper_clients \
+	o3tl/qa/test-array_view \
 	o3tl/qa/test-cow_wrapper \
 	o3tl/qa/test-lru_map \
 	o3tl/qa/test-sorted_vector \
diff --git a/o3tl/qa/test-array_view.cxx b/o3tl/qa/test-array_view.cxx
new file mode 100644
index 000000000000..3a19c093304a
--- /dev/null
+++ b/o3tl/qa/test-array_view.cxx
@@ -0,0 +1,79 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <sal/config.h>
+
+#include <stdexcept>
+
+#include <cppunit/TestAssert.h>
+#include <cppunit/TestFixture.h>
+#include <cppunit/extensions/HelperMacros.h>
+
+#include <o3tl/array_view.hxx>
+
+namespace {
+
+class Test: public CppUnit::TestFixture {
+private:
+    CPPUNIT_TEST_SUITE(Test);
+    CPPUNIT_TEST(testOperations);
+    CPPUNIT_TEST_SUITE_END();
+
+
+    void testOperations() {
+        int some_data[] { 1, 2, 3 };
+        o3tl::array_view<int> v(some_data);
+
+        CPPUNIT_ASSERT_EQUAL(1, *v.begin());
+        CPPUNIT_ASSERT_EQUAL(
+            o3tl::array_view<int>::difference_type(3), v.end() - v.begin());
+        CPPUNIT_ASSERT_EQUAL(1, *v.cbegin());
+        CPPUNIT_ASSERT_EQUAL(
+            o3tl::array_view<int>::difference_type(3), v.cend() - v.cbegin());
+        CPPUNIT_ASSERT_EQUAL(3, *v.rbegin());
+        CPPUNIT_ASSERT_EQUAL(
+            o3tl::array_view<int>::difference_type(3), v.rend() - v.rbegin());
+        CPPUNIT_ASSERT_EQUAL(3, *v.crbegin());
+        CPPUNIT_ASSERT_EQUAL(
+            o3tl::array_view<int>::difference_type(3), v.crend() - v.crbegin());
+        CPPUNIT_ASSERT_EQUAL(o3tl::array_view<int>::size_type(3), v.size());
+        CPPUNIT_ASSERT_EQUAL(o3tl::array_view<int>::size_type(3), v.length());
+        CPPUNIT_ASSERT_EQUAL(o3tl::array_view<int>::npos - 1, v.max_size());
+        CPPUNIT_ASSERT(!v.empty());
+        CPPUNIT_ASSERT_EQUAL(2, v[1]);
+        try {
+            v.at(o3tl::array_view<int>::npos);
+            CPPUNIT_FAIL("missing exception");
+        } catch (std::out_of_range &) {}
+        CPPUNIT_ASSERT_EQUAL(1, v.at(0));
+        CPPUNIT_ASSERT_EQUAL(3, v.at(2));
+        try {
+            v.at(3);
+            CPPUNIT_FAIL("missing exception");
+        } catch (std::out_of_range &) {}
+        CPPUNIT_ASSERT_EQUAL(1, v.front());
+        CPPUNIT_ASSERT_EQUAL(3, v.back());
+        CPPUNIT_ASSERT_EQUAL(1, *v.data());
+        {
+            int d1[] { 1, 2 };
+            int d2[] { 3, 4, 5, 6 };
+            o3tl::array_view<int> v1( d1 );
+            o3tl::array_view<int> v2( d2 );
+            v1.swap(v2);
+            CPPUNIT_ASSERT_EQUAL(o3tl::array_view<int>::size_type(4), v1.size());
+            CPPUNIT_ASSERT_EQUAL(o3tl::array_view<int>::size_type(2), v2.size());
+        }
+    }
+};
+
+CPPUNIT_TEST_SUITE_REGISTRATION(Test);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */