Comments on: Please meet: Lua http://victorsergienko.com/please-meet-lua/ Software design and development: OOD, C++, .NET, Java, a little this and that Tue, 16 Mar 2010 22:11:22 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Victor Sergienko http://victorsergienko.com/please-meet-lua/comment-page-1/#comment-820 Victor Sergienko Thu, 11 Dec 2008 09:49:13 +0000 http://victorsergienko.com/?p=41#comment-820 On the second thought, ad-hoc polymorphism is easily implemented in Python-style constructor, just by calling parent constructor and reassigning proper methods. OTOH, I could be thinking about parametric polymorphism when I was writing "ad-hoc". Which really needs a metatable trick with __call override and runtime parameter type analysis. And still a topic for another interesting hack :) On the second thought, ad-hoc polymorphism is easily implemented in Python-style constructor, just by calling parent constructor and reassigning proper methods.

OTOH, I could be thinking about parametric polymorphism when I was writing “ad-hoc”. Which really needs a metatable trick with __call override and runtime parameter type analysis. And still a topic for another interesting hack :)

]]> By: Peter Provost http://victorsergienko.com/please-meet-lua/comment-page-1/#comment-819 Peter Provost Wed, 10 Dec 2008 20:08:03 +0000 http://victorsergienko.com/?p=41#comment-819 You can implement polymorphism through creative use of setmetatable and __index. Look through the Lua Wiki, the Lua Book or some of code from the Warcraft WowAce project for examples. You can implement polymorphism through creative use of setmetatable and __index. Look through the Lua Wiki, the Lua Book or some of code from the Warcraft WowAce project for examples.

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