Refactored filter diagrams to three value logic

src/common/model/tvl.h

@@ -0,0 +1,74 @@
+/**
+ * src/class_diagram/model/tvl.h
+ *
+ * Copyright (c) 2021-2022 Bartek Kryza <bkryza@gmail.com>
+ *
+ * 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.
+ */
+#pragma once
+
+#include <optional>
+#include <string>
+
+namespace clanguml::common::model::tvl {
+
+using value_t = std::optional<bool>;
+
+inline bool is_true(const value_t &v) { return v.has_value() && v.value(); }
+
+inline bool is_false(const value_t &v) { return v.has_value() && !v.value(); }
+
+inline bool is_undefined(const value_t &v) { return !v.has_value(); }
+
+template <typename InputIterator, typename Predicate>
+inline value_t all_of(InputIterator first, InputIterator last, Predicate pred)
+{
+    value_t res{};
+
+    for (InputIterator it = first; it != last; it++) {
+        value_t m = pred(*it);
+        if (m.has_value()) {
+            if (m.value() == true) {
+                res = true;
+            }
+            else {
+                res = false;
+                break;
+            }
+        }
+    }
+
+    return res;
+}
+
+template <typename InputIterator, typename Predicate>
+inline value_t any_of(InputIterator first, InputIterator last, Predicate pred)
+{
+    value_t res{};
+
+    for (InputIterator it = first; it != last; it++) {
+        value_t m = pred(*it);
+        if (m.has_value()) {
+            if (m.value() == true) {
+                res = true;
+                break;
+            }
+            else {
+                res = false;
+            }
+        }
+    }
+
+    return res;
+}
+};