1 files changed, 57 insertions, 0 deletions
diff --git a/include/diagram/scope.h b/include/diagram/scope.h
new file mode 100644
index 0000000..63698dd
--- /dev/null
+++ b/include/diagram/scope.h
@@ -0,0 +1,57 @@
+#ifndef DIAGRAM_SCOPE_H
+#define DIAGRAM_SCOPE_H
+
+#include "diagram/statement.h"
+
+#include <QString>
+
+namespace samb {
+
+/* The Scope is a forward-iterable object that contains statements.
+ * A scope is also a valid type of statement.
+ *
+ * The Scope object is used inside other complex types of statements such as
+ * BranchStatement or a IteratorStatement, to hold the statements within their
+ * scope.
+ */
+class Scope : public Statement
+{
+public:
+    class iterator {
+    public:
+        explicit iterator(pointer statement);
+        ~iterator();
+
+        iterator& operator++();
+        iterator& operator++(int);
+
+        Statement& operator*() const;
+        Statement::pointer operator->() const;
+
+    private:
+        Statement::pointer _current;
+    };
+
+    explicit Scope(const QString &label);
+    Scope(const QString &label, Statement::pointer first);
+    virtual ~Scope();
+
+    iterator insert_after(iterator it, Statement::pointer statement);
+    iterator erase_after(iterator it);
+
+    /* accessors */
+    std::size_t size() const { return _size; }
+
+    /* iterator */
+    iterator begin() { return iterator(_head); }
+    iterator end() { return iterator(_tail); }
+
+private:
+    Statement::pointer _head;
+    Statement::pointer _tail;
+    std::size_t _size = 0;
+};
+
+} /* namespace samb */
+
+#endif /* SRC_DIAGRAM_SCOPE_HPP_ */