Introduce Cosmopolitan Templates Library (CTL)

test/ctl/optional_test.cc

@@ -0,0 +1,114 @@
+// -*- mode:c++;indent-tabs-mode:nil;c-basic-offset:4;coding:utf-8 -*-
+// vi: set et ft=cpp ts=4 sts=4 sw=4 fenc=utf-8 :vi
+//
+// Copyright 2024 Mozilla Foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "ctl/optional.h"
+
+#include <new>
+
+#include "ctl/string.h"
+
+int
+main()
+{
+
+    {
+        Optional<int> x;
+        if (x)
+            return 1;
+        if (x.has_value())
+            return 2;
+    }
+
+    {
+        Optional<int> x(42);
+        if (!x)
+            return 3;
+        if (!x.has_value())
+            return 4;
+        if (x.value() != 42)
+            return 5;
+    }
+
+    {
+        Optional<String> x("hello");
+        Optional<String> y(x);
+        if (!y)
+            return 6;
+        if (!y.has_value())
+            return 7;
+        if (y.value() != "hello")
+            return 8;
+    }
+
+    {
+        Optional<String> x("world");
+        Optional<String> y(std::move(x));
+        if (!y)
+            return 9;
+        if (!y.has_value())
+            return 10;
+        if (y.value() != "world")
+            return 11;
+    }
+
+    {
+        Optional<int> x(42);
+        Optional<int> y;
+        y = x;
+        if (!y)
+            return 13;
+        if (!y.has_value())
+            return 14;
+        if (y.value() != 42)
+            return 15;
+    }
+
+    {
+        Optional<String> x("hello");
+        Optional<String> y;
+        y = std::move(x);
+        if (!y)
+            return 16;
+        if (!y.has_value())
+            return 17;
+        if (y.value() != "hello")
+            return 18;
+    }
+
+    {
+        Optional<int> x(42);
+        x.reset();
+        if (x)
+            return 20;
+        if (x.has_value())
+            return 21;
+    }
+
+    {
+        Optional<String> x;
+        x.emplace("hello");
+        if (!x)
+            return 22;
+        if (!x.has_value())
+            return 23;
+        if (x.value() != "hello")
+            return 24;
+    }
+
+    CheckForMemoryLeaks();
+    return 0;
+}