[DEV] add back in the string API

etk/String.cpp

@@ -1,4 +1,8 @@
-
+/**
+ * @author Edouard DUPIN
+ * @copyright 2011, Edouard DUPIN, all right reserved
+ * @license MPL-2 (see license file)
+ */
 
 #include <etk/String.hpp>
 #include <etk/UString.hpp>
@@ -256,6 +260,14 @@ void etk::String::popBack() {
 	}
 }
 
+char& etk::String::back() {
+	return m_data[m_data.size()-2];
+}
+
+const char& etk::String::back() const {
+	return m_data[m_data.size()-2];
+}
+
 void etk::String::reserve(size_t _size) {
 	m_data.reserve(_size+1);
 }

etk/String.hpp

@@ -362,6 +362,12 @@ namespace etk {
 			 * @brief Remove the last element of the string
 			 */
 			void popBack();
+			/**
+			 * @brief Get the last element of the String
+			 * @return An reference on the last char
+			 */
+			char& back();
+			const char& back() const;
 			/**
 			 * @brief Force the container to have a minimum size in memory allocation
 			 * @param[in] _size Size in byte that is requested.