code quality and backreference support in controllers.

laravel/database/grammar.php

@@ -30,7 +30,11 @@ abstract class Grammar {
 		{
 			$segments = explode(' ', $value);
 
-			return $this->wrap($segments[0]).' AS '.$this->wrap($segments[2]);
+			return sprintf(
+				'%s AS %s',
+				$this->wrap($segments[0]),
+				$this->wrap($segments[2])
+			);
 		}
 
 		// Since columns may be prefixed with their corresponding table

laravel/database/schema.php

@@ -75,9 +75,8 @@ class Schema {
 		}
 
 		// For some extra syntax sugar, we'll check for any implicit
-		// indexes on the table. The developer may specify the index
-		// type on the fluent column declaration. Here we'll find
-		// any implicit indexes and add the commands.
+		// indexes on the table since the developer may specify the
+		// index type on the fluent column declaration.
 		foreach ($table->columns as $column)
 		{
 			foreach (array('primary', 'unique', 'fulltext', 'index') as $key)

laravel/routing/controller.php

@@ -57,16 +57,41 @@ abstract class Controller {
 
 		list($controller, $method) = explode('@', $destination);
 
+		list($method, $parameters) = static::backreference($method, $parameters);
+
 		$controller = static::resolve($bundle, $controller);
 
-		// If the controller could not be resolved, we're out of options and will
-		// return the 404 error response. Of course, if we found the controller,
-		// we can go ahead and execute the requested method on the instance.
+		// If the controller could not be resolved, we're out of options and
+		// will return the 404 error response. If we found the controller,
+		// we can execute the requested method on the instance.
 		if (is_null($controller)) return Response::error('404');
 
 		return $controller->execute($method, $parameters);
 	}
 
+	/**
+	 * Replace all back-references on the given method.
+	 *
+	 * @param  string  $method
+	 * @param  array   $parameters
+	 * @return array
+	 */
+	protected static function backreference($method, $parameters)
+	{
+		// Controller delegates may use back-references to the action parameters,
+		// which allows the developer to setup more flexible rouets to their
+		// controllers with less code. We will replace the back-references
+		// with their corresponding parameter value.
+		foreach ($parameters as $key => $value)
+		{
+			$method = str_replace('(:'.($key + 1).')', $value, $method, $count);
+
+			if ($count > 0) unset($parameters[$key]);
+		}
+
+		return array(str_replace('$1', 'index', $method), $parameters);
+	}
+
 	/**
 	 * Resolve a bundle and controller name to a controller instance.
 	 *