I'm thinking by this point that it would be better to just develop an explicit tool to control caching, and some mechanisms (if they don't already exist) to audit what pages are not cached and identifying the worst reloaders) Wnt (talk) 15:48, 13 January 2014 (UTC). There are still a few things I'm not sure about, though. Download the official Lua source code here: https://www.lua.org/download.html. Normally this wouldn't be an issue, except I was wondering if you write a Lua module that requires another Lua module or mw.title.new()s a data file, is the target module or file protected when the main module is cascade-protected? A fixed size callstack has the highest performance and has a fixed memory overhead. That would only apply to your contributions though, not to later modifications made by other editors. Hex (? I don't know, but with some of these things being transcluded on every page in the wiki, and having elaborate powers to write anything they can slip by the interface, we should be wary of security holes, and the first step is to know quickly and certainly which are a unit, I think. Needs study to guarantee correctness! how can i do this (on which module, i find this Category for translation). In Chapter 16 we will discuss such calls (what is sometimes called procedure I'm currently using the following function to get template arguments. A complete example looks like this: The LState defines some convenience functions, in the example above we are using L.ToInt(1) to fetch the first function argument. For example, Module:Navbar contains the code: In what case would frame not be equal to mw.getCurrentFrame()? So the idea is the next one: But lua has a specific way to treat weblink and it is right now impossible to use a web address as a string. See the explanation on how to do concurrency in Lua in sol2 here (especially about lua_xmove and sol::main_object). The easy part is 'getting rid of the function name': assuming p is the variable in the last line of the program, just say, However, I see no way to get rid of the pipe - it. Can someone make a nice SpecialPages adjustment? Toohool (talk) 17:18, 27 March 2013 (UTC), I have another related question. Hence, for Lua, the alternative is to pass fewer parameters, but as strings of choices delimited by separator characters within each string. Older versions of Lua created empty tables with some pre-all ocated slots (four, if I The simplest way to time some Lua code is to use the time command with the resty command. Youre unlikely to run into performance issues, unless youre making a AA/AAA game or a complex simulation program. WebThe Lua interpreter offers two hooks for debug purposes: typedef void (*lua_CHFunction) (lua_Function func, char *file, int line); extern lua_CHFunction lua_callhook; typedef void (*lua_LHFunction) (int line); extern lua_LHFunction lua_linehook; The first one is called whenever the interpreter enters or leaves a function. If you wish to retain the metadata for logging or other purposes, the entire metadata table is returned as the third return value from load(), containing the metadata for every key that was operated on (including those with no conflicts). Any suggestion on how to receive this parameter template as a table rather than a substituted string? 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). -DePiep (talk) 23:30, 19 July 2013 (UTC), Do Module:WikiLink and voy:ru::Wikilinks effectively aim to do the same thing? My initial thought is that having a module named after a single string function may be a bit extravagant, so perhaps it would be better grouped with other similar functions, if those exist somewhere. ], So templates can call Lua modules, parser functions and pages in MediaWiki namespace. It is superfluous if you only call the function once within the scope of the local variable, but that is pretty rare. The fact that even an IP user may edit the module namespace suggests that it must be really stable and secure. Right now I'm putting ratings on the documentation subpages, which I think is what someone suggested before at one point for categories. The tutorial I actually want is how a template with parser functions translate into a Lua module with explanation of what syntax equal what variable/function or whatever. Eg: {{example |row1 = {{template2|height=52}} }}, In the above exaple we can get row1 as frame.args.row1 but is it possible to get height from row1. L.DoString runs the Lua code in the VM. This code is OK (calling C++ from Lua is cheap): This code is not that good (calling Lua from C++ is slow): Profile first. laura lehn - via Google, I highly recommend Mayflower. --Vriullop (talk) 11:07, 22 March 2013 (UTC). When calling a function, It behaves somewhat like a stack as in [Forth] but with one element. The sandbox Wiki code {{Special:AllPages|namespace=666}} {{CURRENTTIMESTAMP}} returns a timestamp that changes each time the page is reloaded, because caching is disabled. 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. What I'm trying to do is much more complicated, see Module:Convert/makeunits, but is the same issue. And you can do even better, you can hide library details and not expose them to Lua at all which will make switching between lower-level frameworks much easier, for example: If you want to use a C library and youre using LuaJIT, you dont even need to create a binding for it at all. thank you. If you notice that your C++ function has a huge overhead because of Lua calls, consider using this pattern: If you dont use local to define/init a variable, it becomes a global by default. The body of the compiled Lua function consists of a series of function calls to the helper functions, one per instruction. Makyen (talk) 05:58, 1 January 2014 (UTC), That makes sense. - basically everything else that doesnt interact with low-level OS APIs much. Calling Lua code is done through L.CallByParam, which takes a parameters object, P, and arguments as variadic parameters. Hard working, fast, and worth every penny! Its a road map for learning Lua and my advice for how to integrate it with C/C++ code. He has also implemented a number of incredible little libraries which Ive used in my projects: Many other great libraries can be found via LuaRocks: https://luarocks.org/. You are free to edit the content of Wikipedia:Lua/To do during the discussion but should not remove the miscellany for deletion template from the top of the page; such a removal will not end the deletion discussion. Throughout the post L will denote a pointer to lua.LState. I can acquire arguments using the frame.args object passed to a script using an iterator function: But this does not seem to work for a library such as mw.site. Makyen(talk) 04:02, 8 May 2014 (UTC), I've heard for quite a while that the Lua scripts only run when the page is parsed, which rules out many interactive features but is efficient. What is the equivalent of {{fullurl:page name}}? I think it's worth checking back about how far we can go toward an ideal bare {{#invoke:SomeName}} format, since the extra parameter is only a nuisance/confusion to many non-Lua users. They are iteration functions, so they add the overhead of a function call to each loop iteration. Its a good starting point for making your own CMake build for Lua, though (or if you use older versions of Lua, they work well). WebWe can disable all the type checking by switching a single variable, and no added overhead would remain when the functions are executed (though there is some slight added overhead when the functions are built). -- The parentheses remove the "number of changes" returned by gsub. They have lots of options for moving. Updated link. However, if we standardize this, with the names copied verbatim and the fairly distinctive capital letter after the /, it should be easy to have a bot notify the author(s) of Module:Submit an edit request automatically when Redirect is updated. Anomie 03:36, 1 November 2013 (UTC), User:Wnt and I have had a little disagreement over the type parameter of the {{lua}} template. Its much easier to test if something is non-nil or has a specific type/fields in Lua than in C++. Servicing Northern California For Over 25 Years, Select The Service Your Interested InDocument ShreddingRecords ManagementPortable StorageMoving ServicesSelf StorageOffice MovingMoving Supplies. Is there a programme wizard who can help see if I've done something stupid? The downside is it will incur a small performance impact every time a new page of callframes is allocated. These timings are likely different on different processor These functions does not throw errors, but will return Go default values if conversion is not possible. Your life will be easier if you have a small C/C++ API. Hopefully this will be semi-useful again. Your help pointing to ways to improve is welcome. (and object-oriented programming) in more detail. (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. The parameters object takes three important parameters: The following code defines a concat function 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). I bypassed the most serious problem, but for some reason the method is generating incoming links to nonexisting articles. Can do a lot of automagic and save you from writing tons of boilerplate code, which you need to do if you use other bindings or Lua C API. Toohool (talk) 18:13, 15 March 2013 (UTC). So its better to do it on Lua side, unless you make a C++ API which has to accept tables for ease-of-use - then you dont have much choice (but you can still wrap them into Lua functions and call C++ function internally). Result #3 works correctly. There is no reason to do it for functions which are already P:S Creating separate module for template2 in above example is not feasible because I am trying to reduce the number of template substitution and writing separate modules would defeat the purpose.--Jayarathina (talk) 05:20, 24 December 2013 (UTC). After the function call, How do I fix this? Now the tab "Modules" does not show all modules, and does not have a 'next page' link. -Wikid77 (talk) 19:29, 22 March 2013 (UTC), When moving a module there is no redirect left behind and existing invocations should be fixed. See a simple example of how to build Lua with CMake and use it with sol2 here. !) 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. For example (C++ functions have cpp postfix): Ask yourself: do all these functions need to be in C++? Hence, passing 2,000 parameters runs 3 seconds, 4,000 parameters runs 13 seconds, or 6,000 parameters run 27 seconds. If a conflict can not be resolved in a satisfactory manner, the function should throw an error to signify this; returning false or nil will result in that value being written to the key. Ive written many articles about using Lua with C++ on my old blog many years ago. I was going to deploy it on Template:Year in other calendars/testcases, but in my preview it runs out of time by the time it gets to the last test. Best Mr. Stradivarius talk 10:42, 27 March 2013 (UTC), You've got it pretty much right. For variety, and to match the fact that if you know what values you are dealing with you might have some "ifthenelse" statements to handle them, I did the format slightly differently. It stays global and doesnt get collected by a GC until it has been set to nil. The function signature must match what you passed in. with nil arguments removed. Our compilation still gets rid of the run-time Wnt thinks that the template should use the "style" type (with a yellow background), and I think it should use the "notice" type (with a grey background). (In the case of Module:Redirect, when I look at the pages that link to it I could easily think, meh, it's not even used by 50 pages, why not start making a series of small edits as long as they preview OK? If those restrictions are not a problem, the new tester provides a convenient way to set up tests on any page, for example: If the above tests were at page "Template:Example/tests", the following would insert a table showing the results of expanding each template and comparing its output with the expected text. I am trying to create a weblink by concatenating 2 strings and by avoiding the display of the full link in an infobox. ( I ran some local tests and it seems pretty easy to crash it, but then again I'm running it in an unstable environment anyway so it may not reflect how things work here on Wikipedia. and expressions in Lua. These variables are called the formal parameters of the function. The formal parameters behave like other local variables inside the function and are created upon entry into the function and destroyed upon exit. While creating a Lua function, you give a definition of what the function has to do. Wnt (talk) 15:56, 6 January 2014 (UTC). For instance, all library functions are written in C; 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. DePiep (talk) 23:55, 21 May 2015 (UTC). The value of any of these keys will never be. I'm a happy user of this space myself with the pet projects I develop in my free time. "factorial: argument must be a number >= 0", -- likely something like 1=foo=bar, we need to do it as a named arg. The simplest language I know. It relies on Module:Sandbox/QuimGil/Flagicon, which provides the logics, and Module:Sandbox/QuimGil/FlagTranslations, where the flags data is stored. If you used classes as globals (which Ive seen in many tutorials and real code), you might have a script like this: Suppose that you didnt execute some_class.lua first (which defines a global SomeClass). Preceding unsigned comment added by Ryn78 (talk contribs) 03:27, 13 October 2013 (UTC), Is it possible for a module to invoke another module? Otherwise empty string. Does this apply if you are accessing the module from another Lua module, and not directly from a wiki page? Within C and C++, some comp n The second clause supports a simple way to invoke the function from another module (such as from Module:Navbox), or from the debug console: Navbar.navbar({arg1 = 'foo', arg2 = 'bar'});. Exposing Go functions to Lua is essential to create custom a custom API. I would have been able to continue contributing to these and other interesting templates. What do people think? Cya. also, if someone already wrote a module that does the same thing, let me know and I will have this one deleted. Dealing with C++ objects in Lua is much harder than dealing with native types. Although Lua can still process the 6,000 parameters, to compare choices, within "0.02" Lua seconds, the load time of the #invoke interface is 27 seconds. We really ought to decide, flip a coin, something so we get this sort of stuff to a predictable spot. I would welcome comments, and if people think the scheme is OK, please consider rating your modules Wnt (talk) 23:31, 16 April 2013 (UTC), I have opened a discussion here: en:Module_talk:String#Replication on other wikis. Then, executing script.lua would resullt in an error: SomeClass is nil. While still largely relevant for later versions, there are some differences.The fourth edition targets Lua 5.3 and is available at Amazon and other bookstores.By buying the book, you also help to support the Lua project. ) The message from MediaWiki:Movepagetext-noredirectfixer should warn about this, perhaps a warning like MediaWiki:Moveuserpage-warning. You can even create small domain specific languages thanks to Luas syntax sugar. : Overusing them makes code harder to understand because now you need to make sure that the object youre are pointing to doesnt change unexpectedly. This is not a tutorial or step-by-step guide. For instance, all library functions are written in C; The documentation toolbox does not yet know about Module testcases (though the editnotice 'sort of' does). Using the L.CheckTypes function equate to checking the type manually and then calling L.TypeError(n int, message string) if there is an error. Its minimalistic, but requires a lot of boilerplate and manual error-checking. There was a problem preparing your codespace, please try again. Everyone took really good care of our things. Johnuniq (talk) 09:37, 7 October 2013 (UTC). OUR MISSION. --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? On each conflict, this function will be passed the conflicted key, the current value that load() is attempting to save, the value that is currently stored in the conflicted key, and a table of metadata consisting of the following: Please note that these keys are created and updated automatically by load() and should not be altered manually.
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