Added definition of gsl::byte to match proposed std::byte.

tests/byte_tests.cpp

@@ -0,0 +1,92 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2015 Microsoft Corporation. All rights reserved.
+//
+// This code is licensed under the MIT License (MIT).
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include <UnitTest++/UnitTest++.h>
+#include <byte.h>
+
+#include <iostream>
+#include <list>
+#include <map>
+#include <memory>
+#include <string>
+#include <vector>
+
+using namespace std;
+using namespace gsl;
+
+namespace
+{
+
+SUITE(byte_tests)
+{
+    TEST(construction)
+    {
+        {
+            byte b = static_cast<byte>(4);
+            CHECK(static_cast<unsigned char>(b) == 4);
+        }
+
+        {
+            byte b = byte(12);
+            CHECK(static_cast<unsigned char>(b) == 12);
+        }
+
+        // waiting for C++17 enum class direct initializer support
+        //{
+        //    byte b { 14 };
+        //    CHECK(static_cast<unsigned char>(b) == 14);
+        //}
+    }
+
+    TEST(bitwise_operations)
+    {
+        byte b = byte(0xFF);
+
+        byte a = byte(0x00);
+        CHECK((b | a) == byte(0xFF));
+        CHECK(a == byte(0x00));
+
+        a |= b;
+        CHECK(a == byte(0xFF));
+
+        a = byte(0x01);
+        CHECK((b & a) == byte(0x01));
+
+        a &= b;
+        CHECK(a == byte(0x01));
+
+        CHECK((b ^ a) == byte(0xFE));
+        
+        CHECK(a == byte(0x01));
+        a ^= b;
+        CHECK(a == byte(0xFE));
+
+        a = byte(0x01);
+        CHECK(~a == byte(0xFE));
+
+        a = byte(0xFF);
+        CHECK((a << 4) == byte(0xF0));
+        CHECK((a >> 4) == byte(0x0F));
+
+        a <<= 4;
+        CHECK(a == byte(0xF0));
+        a >>= 4;
+        CHECK(a == byte(0x0F));
+    }
+}
+}
+
+int main(int, const char* []) { return UnitTest::RunAllTests(); }