add a cool lua repl

lib/lua-repl/repl/plugins/example.lua

@@ -0,0 +1,41 @@
+-- Example plugin that demonstrates the objects available to a
+-- plugin, as well as the methods that a plugin should make use
+-- of
+
+-- Adding methods and properties to the repl object adds them to
+-- the REPL object loading the plugin.  If such a method or property
+-- already exists, the current plugin will fail to load.
+function repl:newmethod(...)
+end
+
+-- Adding methods to the before object causes them to be called
+-- before the actual method itself.  If the method being added
+-- (in this case displayresults) does not exist on the REPL object
+-- loading this plugin, the current plugin will fail to load.
+function before:displayresults(results)
+end
+
+-- Adding methods to the after object causes them to be called
+-- after the actual method itself.  If the method being added
+-- (in this case displayresults) does not exist on the REPL object
+-- loading this plugin, the current plugin will fail to load.
+function after:displayresults(results)
+end
+
+-- Adding methods to the around object causes them to be called
+-- instead of the original method of the same name.  The new
+-- method receives all of the arguments that the original would,
+-- except it also receives the original method as the first argument.
+-- This way, the new method may invoke the original as it pleases.
+-- If the method being added (in this case displayresults) does not exist on
+-- the REPL object loading this plugin, the current plugin will fail to load.
+function around:evalute(orig, chunk)
+end
+
+-- Adding methods to the override object causes them to be called
+-- instead of the original method of the same name.  If the method being added
+-- (in this case displayresults) does not exist on the REPL object loading this
+-- plugin, the current plugin will fail to load.
+function override:name()
+  return 'Plugin!'
+end