From ee7ac58694c16cdd922a6eeddbe1a2eba0da7b4e Mon Sep 17 00:00:00 2001
From: Michael Krelin <hacker@klever.net>
Date: Sat, 29 Jan 2005 19:41:34 +0000
Subject: initial commit.

---
(limited to 'include/konforka/basic_wrapper.h')

diff --git a/include/konforka/basic_wrapper.h b/include/konforka/basic_wrapper.h
new file mode 100644
index 0000000..909f8b6
--- a/dev/null
+++ b/include/konforka/basic_wrapper.h
@@ -0,0 +1,118 @@
+#ifndef __KONFORKA_BASIC_WRAPPER_H
+#define __KONFORKA_BASIC_WRAPPER_H
+
+/**
+ * @file
+ * @brief The konforka::basic_wrapper class declaration.
+ */
+
+#include <konforka/exception.h>
+
+namespace konforka {
+
+    /**
+     * @brief The basic wrapper class.
+     *
+     */
+    template<typename T>
+	class basic_wrapper {
+	    public:
+		/**
+		 * The type of wrapped content.
+		 */
+		typedef T content_type;
+
+		/**
+		 * The content wrapped into the instance.
+		 */
+		content_type opkele;
+		/**
+		 * This boolean indicates whether the object has a content
+		 * attached to it.
+		 */
+		bool bopkele;
+
+		/**
+		 * Default constructors creates the object with no content
+		 * associated with it.
+		 */
+		basic_wrapper()
+		    : bopkele(false) { }
+		/**
+		 * The constructor associates the content give with the object.
+		 * @param o the content being attached to the object.
+		 */
+		basic_wrapper(content_type o)
+		    : opkele(o), bopkele(true) { }
+		/**
+		 * Virtual destructor doing nothing in this class.
+		 */
+		virtual ~basic_wrapper() { }
+
+		/**
+		 * Attaches the given content to the object.
+		 * @param o the content being attached to the object.
+		 */
+		void attach(content_type o) {
+		    opkele = o;
+		    bopkele = true;
+		}
+
+		/**
+		 * Test whether the object has content attached.
+		 * @return naturally, returns true if yes.
+		 */
+		bool is() const {
+		    return bopkele;
+		}
+
+		/**
+		 * Throws an exception in case the object lacks content
+		 * attached.
+		 */
+		void ensure() const {
+		    if(!is())
+			throw konforka::exception(CODEPOINT,"no content attached");
+		}
+
+		/**
+		 * Get the content attached to the object. It would throw an
+		 * exception if there is no content attached.
+		 * @return reference to the content.
+		 */
+		virtual content_type& get_content() {
+		    ensure();
+		    return opkele;
+		}
+		/**
+		 * Get the content attached to the object. It would throw an
+		 * exception if there is no content attached.
+		 * @return const reference to the content.
+		 */
+		virtual const content_type& get_content() const {
+		    ensure();
+		    return opkele;
+		}
+
+		/**
+		 * Casts the object to the reference to the content type,
+		 * throwing an exception if there's no content associated with
+		 * an object.
+		 * @return reference to the content attached.
+		 * @see get_content()
+		 */
+		operator const content_type&(void) const { return get_content(); }
+		/**
+		 * Casts the object to the const reference to the content type,
+		 * throwing an exception if there's no content associated with
+		 * an object.
+		 * @return reference to the content attached.
+		 * @see get_content()
+		 */
+		operator content_type&(void) { return get_content(); }
+	};
+
+}
+
+#endif /* __KONFORKA_BASIC_WRAPPER_H */
+/* vim:set ft=cpp: */
--
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