Greetings Stephan Kulla (talk) 15:54, 19 May 2013 (UTC), (Sorry for writing here. Our compilation still gets rid of the run-time Similarly to the previous advice, when defining classes (e.g. If you're unaware, {{unsubst}} (along with a few other templates) is used to make it so that entering {{subst:citation needed}} in an article results in {{Citation needed| date=November 2013}} rather than dumping all the template code into the article. I get an error message when I use it. and expressions in Lua. Basically, you need to tell Lua explicitly that something youve created in the coroutine needs to outlive this coroutine (and this is done with lua_xmove). The syntax of the template sends another template as parameter. The parameters object takes three important parameters: The following code defines a concat function in Lua. The parser seems to reject any effort to initialize a table in the return statement if one of the indexes is, or could be, interpreted as a number. This makes dependencies between files hard to track and require you to manually execute some_class.lua before you can execute script.lua. Comments appreciated. This code is OK (calling C++ from Lua is cheap): This code is not that good (calling Lua from C++ is slow): Profile first. Lua is written in ANSI C, so it can compile almost everywhere. So tonight I put together Module:Unsubst, which can be used to do the same thing without all the limitations of {{unsubst}}. Calling Lua code is done through L.CallByParam, which takes a parameters object, P, and arguments as variadic parameters. For instance, all library functions are written in C; The reference manual for Lua 5.4s C API is here: https://www.lua.org/manual/5.4/manual.html#4, Github repo: https://github.com/ThePhD/sol2. To maintain similarity with other sandbox pages (in template space and user space), I propose: If we agree on this, we can encourage/discourage patterns. I would use them again if needed. Calls the concat function with the arguments Go and Lua and prints the resulting string to stdout. Almost all of us to be a lot better about putting comments up front in the module and/or documentation saying what the heck our modules are FOR. = The problem with 3rd party bindings is that they usually tend to get unmaintained or only support a specific version of the library. Also explains why the uselang=qqq hack doesn't work to show the scribunto messages. We have a lot of cases where related modules have the same name with "/" to indicate subpages, and some others where apparently related modules simply extend a name. Check out this engine for making Zelda-likes for inspiration of how to write game code in Lua. Instead of requiring Module:Redirect from a protected module (or in this case a template, Template:Submit an edit request, which serves MediaWiki:Protectedpagetext), you would simply require or link to a copy (Module:Submit an edit request/Redirect). The Lua version has some differences from the current template, so I would like to get others' comments before making the switch. {{. After your basic game engine is implemented, start with writing new code in Lua. It uses heavy meta-programming to get things done. Please don't take those *personal* suggestions as a criticism to Wikipedia:Lua. The #invoke speed in March 2013 has been about 180/second, compared to short templates running 350-600 per second, or parser functions >750/second, or character-insertion templates running 2,400/second. 1 Answer Sorted by: 3 I would generally recommend to avoid making high volume calls into Lua. Clearly it's worth thinking about ways to reduce this impact as much as possible. laura lehn - via Google, I highly recommend Mayflower. It doesnt have many gotchas. A language variable can contain values of any type. WebWhen iterating a table, the function overhead from ipairs does not justify it's use. http://godoc.org/github.com/yuin/gopher-lua, http://github.com/otm/embedding-lua-in-go, http://godoc.org/github.com/yuin/gopher-lua#LTable. Your help pointing to ways to improve is welcome. Yes, you can replace built-in functions because they are simply functions accessed from global variables. how can i do this (on which module, i find this Category for translation). also, if someone already wrote a module that does the same thing, let me know and I will have this one deleted. Timing Lua Code Correctly in OpenResty I've been trying to use some of the other frame functions, and I can get them working via #invoke, but not through the debug console. This is typically done with a copyright template placed on your user page though you might want to modify one of them to specify that it only applies to Lua modules. The first clause supports the case where the module is being invoked from a template as {{#invoke: Navbar | navbar}}. If you notice that your C++ function has a huge overhead because of Lua calls, consider using this pattern: // in C++ sol::table t = lua.create_table (); for (int i = 0; i < 1000; i++) { // do stuff in C++, push data to Lua table occasionally } luaFunc (t); -- in Lua function someFunc (t) for k,v in pairs (t) do -- do stuff end end 5. Then, executing script.lua would resullt in an error: SomeClass is nil. Link/Create testcases link for Module pages. that is, to call o.foo adding o as a first extra argument. (alright, the bot might miss that one, unless it knows to go back and check a template by the same name also, but you understand) My feeling is that if the reuser is going to put millions of pages on the queue, he should have the chance to decide whether he wants the latest update in the module to be passed along, or if it can wait. a function definition has a conventional syntax; -happy5214 14:32, 15 March 2013 (UTC), You own the copyright, you can grant whatever licenses you want (in addition, as you say, to the CC-BY-SA license that you've already granted). or subroutine in other languages) You dont need to compile Lua code, which means that you can change parts of your program/game logic without recompiling and even without reloading your program. Thank you. Vanilla Lua, the latest version, otherwise. With a clear upsream in a central place like mediawiki.org then en.wiki and other Wikimedia projects could work better on local support and whatever is specific to their communities. n Servicing Northern California For Over 25 Years, Select The Service Your Interested InDocument ShreddingRecords ManagementPortable StorageMoving ServicesSelf StorageOffice MovingMoving Supplies. In the example bellow sayHello function is first defined, and then called in the second call to DoString. See the demos and more details at WikiProject Flag Template. -DePiep (talk) 23:30, 19 July 2013 (UTC), Do Module:WikiLink and voy:ru::Wikilinks effectively aim to do the same thing? Please comment over there if you're interested. This is a matter of implementation of the compiler or runtime (and its options) and cannot be said with any certainty. I'm a happy user of this space myself with the pet projects I develop in my free time. Now, with this new LUA language, template editing is becoming more and more the domain of technicians. --Iantresman (talk) 14:56, 12 December 2013 (UTC), --Iantresman (talk) 09:36, 13 December 2013 (UTC), Does our implementation allow Lua scripts access to whether the user is logged in or not? Text formatting (bold, italics) breaks when the ''/''' tags are not closed for each argument. DePiep (talk) 23:55, 21 May 2015 (UTC). Its much easier to test if something is non-nil or has a specific type/fields in Lua than in C++. Each layer of "shell templates" (to #invoke a Lua function) also increases the expansion depth by about +2 levels of the 41-level limit (shows "41/40"). Toohool (talk) 18:13, 15 March 2013 (UTC). ", [ [\w+\. Currently, there are a reasonable number of templates that try to determine if any of a set of pages exist in order to provide links to those pages. ]], "jo")' But there is a catch. Updated link. There are a number of To(n int) functions available. Its neat. This bytecode is converted into LLVM IR and then fed into Deegen, which can transform the functions to do tail calls correctly, use the GHC calling conventions, and a You can easily print table contents with it: For example, Id recommend to avoid SDL/glfw/SFML bindings and writing them manually for the stuff you need. !) 16:39, 24 February 2013 (UTC), the following code is arguably better than the current one;-) [Note: It also highlights more Lua features - assertion, type checking, local scoping, tail call recursion etc. -Wikid77 (talk) 12:07, 24 March 2013 (UTC). a find-and-replace Macro that lets you write code that acts like a function, without the function overhead running an external image to lua tool, so you can just stick the images in your Project folder, and automatically include them into your lua script every time you hit F7 ! -- Sameboat - (talk) 07:07, 18 March 2013 (UTC), Thank Dragons flight for clearing something for me. thank you. It is superfluous if you only call the function once within the scope of the local variable, but that is pretty rare. --Jarekt (talk) 16:24, 14 March 2013 (UTC), Are module authors permitted to use other licenses (presumably in addition to the CC-BY-SA license) for modules they develop? Johnuniq (talk) 02:22, 25 June 2013 (UTC). (what is sometimes called procedure Often the linked module contains bells and whistles that aren't really necessary; why not bring it into the module and slim it down? :) Wnt (talk) 02:58, 6 January 2014 (UTC). I'd rather see useful LUA links. --Rotpunkt (talk) 13:50, 9 January 2014 (UTC), mediawikiwiki:Extension talk:Scribunto/Lua reference manual #Example for string.format? I would have been able to continue contributing to these and other interesting templates. I am trying to create a weblink by concatenating 2 strings and by avoiding the display of the full link in an infobox. Automatic transclusion of protection templates was added. That overhead might be removed if we made save/restore a built-in operation in Lua. Integrating it with CMake is somewhat trickier. *, I'd like to find out which mw.site library options are available, and print their value, without having to specify each one individually, ie. A [6] question at Module:Redirect reminded me of a remarkable statement by @Wikid77: that updating some Lua modules can cause 7 million pages to be reformatted on the WP:Job queue. Technical 13 (talk) 12:12, 9 May 2013 (UTC). Calling Lua Functions - Game Dev Geek It is also possible to make the function a parameter if it comes from a defined list of choices - just load up your data and set a loop that p[xyz] = function(frame) return p.main(frame, xyz) end. For instance, consider the following function, to increment a global counter. This function has 1 as its default argument; that is, the call incCount (), without arguments, increments count by one. When you call incCount () , Lua first initializes n with nil ; the or results in its second operand; and as a result Lua assigns a default 1 to n . I have used the mw.title library with a call like mw.title.new(page_name):fullUrl({uselang=lang}), but mw.title.new() is marked as an expensive function so I would like to known if there are alternative.--Moroboshi (talk) 07:06, 18 May 2013 (UTC), Is there a way to use the Mediawiki API inside Lua? Best Mr. Stradivarius talk 10:42, 27 March 2013 (UTC), You've got it pretty much right. Currently it is misleading advising to check for double redirects. These snippets of Python and Lua are roughly equivalent. Or is it something else? When programming in Lua, you may use constructors to avoid th ose initial rehashings. When you write {true, true, true} , Lua knows beforehand that the table will need three slots in its array part, so Lua creat es the table with that size. Work fast with our official CLI. : Overusing them makes code harder to understand because now you need to make sure that the object youre are pointing to doesnt change unexpectedly. Does this apply if you are accessing the module from another Lua module, and not directly from a wiki page? The system compares actual template output with fixed text, and is only suitable for templates and results that are reasonably short because each template and its expected result have to be in one line. Ive used LuaDists CMake build scripts for Lua for many years, but LuaDist authors have stopped supporting newer Lua versions. Can someone make a nice SpecialPages adjustment? You can learn about how to use Lua C API here (or in the latest version of Programming in Lua) - the online version is written for Lua 5.1 and some things have changed since 5.1, but most concepts have stayed the same. You can even create small domain specific languages thanks to Luas syntax sugar. However: This overhead may be trivial compared to what the body of Does mw.ustring.byteoffset work correctly with negative offsets? It relies on Module:Sandbox/QuimGil/Flagicon, which provides the logics, and Module:Sandbox/QuimGil/FlagTranslations, where the flags data is stored. GitHub - Samur3i/direct-loader: Requires all Lua files in a The approach of Module:Sandbox - having every user put scripts into a common receptacle - seems unworkable. Relevant to Lua, userscripts, and user scripting generally. Its a road map for learning Lua and my advice for how to integrate it with C/C++ code. Lua is a language with implicitly dynamic data types. John Victor - via Google, Very nice owner, extremely helpful and understanding Can templates, MediaWiki pages or parser functions be called from Lua? The NewPP parser hits the huge delays when passing 6,000 parameters whether to Lua, or to a template, or to a #switch parser function of 6,000 "|x=" branches. Incnis Mrsi (talk) 11:59, 2 July 2013 (UTC), Hi, your feedback is welcome at Bug 50329 - We need a common repository for Scribunto modules and templates. its hard to know if what youre passing to Lua will be copied or passed by a reference). I know we are quite far into WP:DEW territory here, but I'd appreciate it if people could comment at the discussion over at Template talk:Lua#Style. This first edition was written for Lua 5.0. In Lua, all arrays are 1-indexed, however t[0] is still valid but that would result in the lenght of the array to be off-by-one. Of course, the specific delay depends on server load, but follows the general exponential slowdown formula, where 7,000 parameters is far slower than a linear extension of 7000/6000 or 17% slower, and runs closer to 47 seconds (+70% slower) rather than 27+17%=31.6 seconds. Preceding unsigned comment added by Ryn78 (talk contribs) 03:27, 13 October 2013 (UTC), Is it possible for a module to invoke another module? If an argument to a function can be of more then one type the L.CheckTypes(n int, types LValueType) function can be used to check and yield an error to the user.