Adds further ext deps as-is binaries copies from customers env.

external/tmsif/include/ddkit/utils/optional.hpp

@@ -0,0 +1,70 @@
+#pragma once
+#include <vector>
+
+namespace ddkit {
+namespace utils {
+namespace types {
+
+template <typename T>
+class Optional {
+
+private:
+    std::vector<T> &vec;
+
+public:
+    Optional(std::vector<T> &val) : vec(val) {}
+
+    Optional() = delete;
+
+    T& value() {
+        if(vec.size()) {
+            return vec[0];
+        } else {
+            throw std::out_of_range( "optional is empty" );
+        }
+    }
+
+    T value_or(T defVal) {
+        return vec.size() ? vec[0] : (defVal);
+    }
+
+    void reset() {
+        if (vec.size()) {
+            vec.clear();
+        }
+    }
+
+    void set(const T &val) {
+        if (vec.size()) {
+            vec[0] = val;
+        } else {
+            vec.push_back(val);
+        }
+    }
+
+    bool has_value() const {
+        return vec.size() ? true : false;
+    }
+
+    std::vector<T> &operator*() {
+        return vec[0];
+    }
+
+    std::vector<T> *operator->() {
+        return vec[0];
+    }
+
+    Optional operator=(const T &val) {
+        set(val);
+
+        return *this;
+    }
+
+    operator bool() const {
+        return has_value();
+    }
+};
+
+}
+}
+}