--[=[  Lua support for the , , , and  templates and replacement of various supporting templates.   ]=]  require('strict');  local getArgs = require ('Module:Arguments').getArgs; local unicode = require ("Module:ইউনিকোড উপাত্ত");								-- for is_Latin() and is_rtl() local yesno = require ('Module:Yesno');  local lang_data =  mw.loadData ('Module:Lang/data/খেলাঘর');							-- language name override and transliteration tool-tip tables local lang_name_table = lang_data.lang_name_table;								-- language codes, names, regions, scripts, suppressed scripts local lang_table = lang_data.lang_name_table.lang; local lang_dep_table = lang_data.lang_name_table.lang_dep; local script_table = lang_data.lang_name_table.script; local region_table = lang_data.lang_name_table.region; local variant_table = lang_data.lang_name_table.variant; local suppressed_table = lang_data.lang_name_table.suppressed; local override_table = lang_data.override;  local synonym_table = mw.loadData ('Module:Lang/ISO 639 synonyms/খেলাঘর');				-- ISO 639-2/639-2T code translation to 639-1 code  local cfg = mw.loadData ('Module:Lang/configuration/খেলাঘর');	-- for internationalization  local is_latn_data = mw.loadData ('Module:Lang/data/is latn data/খেলাঘর'); local sizeof_ranges_t = is_latn_data.sizeof_ranges_t;  local namespace = mw.title.getCurrentTitle().namespace;							-- used for categorization  local content_lang = mw.language.getContentLanguage(); local this_wiki_lang_tag = content_lang.code;									-- get this wiki's language tag local this_wiki_lang_dir = content_lang:getDir();								-- get this wiki's language direction  local initial_style_state;														-- set by lang_xx_normal() and lang_xx_italic()  local maint_cats = {};															-- maintenance categories go here local maint_msgs = {};															-- and their messages go here  --[[--------------------------< M A K E _ E R R O R _ S P A N >--------------------------------------------------  ]]  local function make_error_span (template, msg) 	return table.concat ({'', cfg.misc_text_t.error, ': ', template, msg, ''}) end  --[[--------------------------< S U B S T I T U T E >----------------------------------------------------------  Substitutes $1, $2, etc in <message> with data from <data_t>. Returns plain-text substituted string when <data_t> not nil; returns <message> else.  ]]  local function substitute (message, data_t) 	return data_t and mw.message.newRawMessage (message, data_t):plain() or message; end  --[[--------------------------< M A K E _ E R R O R _ M S G >--------------------------------------------------  Assembles an error message from template name, message text, help link, and error category.  ]]  local function make_error_msg (msg, args_t, template) 	local category; 	local text;																	-- handle the oddity that is  	if cfg.templates_t.langxx == template then 		text = args_t.text or args_t[1];										-- for  	else 		text = args_t.text or args_t[2];										-- for , , and  	end  	if cfg.templates_t.transliteration == template then 		category = cfg.make_error_msg_t.xlit_err_cat; 	else 		category = cfg.make_error_msg_t.lang_err_cat; 	end 	 	local category_link = ((0 == namespace or 10 == namespace) and not args_t.nocat) and substitute ('Category:$1', {category}) or ; 	return substitute ('[$1] $2: {{$3}}: $4 ($6)$7',	-- { prevents template name from being treated as a template call in certain situations 		{ 		text or cfg.make_error_msg_t.undefined, 		cfg.misc_text_t.error, 		template, 		msg, 		category, 		cfg.misc_text_t.help, 		category_link 		}) end 	  --[[--------------------------< P A R A M E T E R _ V A L I D A T E >------------------------------------------  ]]  local function parameter_validate (args_t, template) 	local err_msg = cfg.parameter_validate_t.invalid_param;  	if cfg.templates_t.lang == template then									-- for  		for param, _ in pairs (args_t) do 			if not cfg.known_params_t.params_lang_t[param] and					-- unique  parameters 				 not cfg.known_params_t.common_params_all_t[param] then			-- common to all 					return substitute (err_msg, {param});						-- <param> not found so abandon 			end 		end 	elseif cfg.templates_t.langx == template then								-- for  		for param, _ in pairs (args_t) do 			if not cfg.known_params_t.params_langx_t[param] and					-- unique  parameters 				not cfg.known_params_t.params_x_t[param] and					-- common to  and  				not cfg.known_params_t.common_params_all_t[param] then			-- common to all 					return substitute (err_msg, {param});						-- <param> not found so abandon 			end 		end 	elseif cfg.templates_t.langxx == template then								-- for  		for param, _ in pairs (args_t) do 			if not cfg.known_params_t.params_lang_xx_t[param] and				-- unique  parameters 				not cfg.known_params_t.params_x_t[param] and					-- common to  and  				not cfg.known_params_t.common_params_all_t[param] then			-- common to all 					return substitute (err_msg, {param});						-- <param> not found so abandon 			end 		end 	end		 end  --[[--------------------------< I S _ S E T >------------------------------------------------------------------  Returns true if argument is set; false otherwise. Argument is 'set' when it exists (not nil) or when it is not an empty string.  ]]  local function is_set (var) 	return not (var == nil or var == ); end  --[[--------------------------< I N V E R T  _ I T A L I C S >-------------------------------------------------  This function attempts to invert the italic markup a args.text by adding/removing leading/trailing italic markup in args.text.  Like |italic=unset, |italic=invert disables automatic italic markup.  Individual leading/trailing apostrophes are converted to their HTML numeric entity equivalent so that the new italic markup doesn't become bold markup inadvertently.  Leading and trailing wiki markup is extracted from args.text into separate table elements.  Addition, removal, replacement of wiki markup is handled by a string.gsub() replacement table operating only on these separate elements. In the string.gsub() matching pattern, '.*' matches empty string as well as the three expected wiki markup patterns.  This function expects that markup in args.text is complete and correct; if it is not, oddness may result.  ]]  local function invert_italics (source) 	local invert_pattern_table = {												-- leading/trailing markup add/remove/replace patterns 		[""]="\'\'",															-- empty string becomes italic markup 		["\'\'"]="",															-- italic markup becomes empty string 		["\'\'\'"]="\'\'\'\'\'",												-- bold becomes bold italic 		["\'\'\'\'\'"]="\'\'\'",												-- bold italic become bold 		}; 	local seg = {};  	source = source:gsub ("%f[\']\'%f[^\']", ''');							-- protect single quote marks from being interpreted as bold markup  	seg[1] = source:match ('^(\'\'+%f[^\']).+') or ;							-- get leading markup, if any; ignore single quote 	seg[3] = source:match ('.+(%f[\']\'\'+)$') or ;							-- get trailing markup, if any; ignore single quote  	if  ~= seg[1] and  ~= seg[3] then										-- extract the 'text'  		seg[2] = source:match ('^\'\'+%f[^\'](.+)%f[\']\'\'+$')					-- from between leading and trailing markup 	elseif  ~= seg[1] then 		seg[2] = source:match ('^\'\'+%f[^\'](.+)')								-- following leading markup 	elseif  ~= seg[3] then 		seg[2] = source:match ('(.+)%f[\']\'\'+$')								-- preceding trailing markup 	else 		seg[2] = source															-- when there is no markup 	end  	seg[1] = invert_pattern_table[seg[1]] or seg[1];							-- replace leading markup according to pattern table 	seg[3] = invert_pattern_table[seg[3]] or seg[3];							-- replace leading markup according to pattern table  	return table.concat (seg);													-- put it all back together and done end  --[[--------------------------< V A L I D A T E _ I T A L I C >------------------------------------------------  Validates |italic= or |italics= assigned values.  When |italic= is set and has an acceptable assigned value, return the matching CSS font-style property value or, for the special case 'default', return nil.  When |italic= is not set, or has an unacceptable assigned value, return nil and a nil error message.  When both |italic= and |italics= are set, returns nil and a 'conflicting' error message.  The return value nil causes the calling lang, lang_xx, or xlit function to set args.italic according to the template's defined default ('inherit' for , 'inherit' or 'italic' for  depending on the individual template's requirements, 'italic' for ) or to the value appropriate to |script=, if set ( and  only).  Accepted values and the values that this function returns are are: 	nil		-	when |italic= absent or not set; returns nil 	default	-	for completeness, should rarely if ever be used; returns nil 	yes		-	force args.text to be rendered in italic font; returns 'italic' 	no		-	force args.text to be rendered in normal font; returns 'normal' 	unset	-	disables font control so that font-style applied to text is dictated by markup inside or outside the template; returns 'inherit' 	invert	-	disables font control so that font-style applied to text is dictated by markup outside or inverted inside the template; returns 'invert'  ]]  local function validate_italic (args) 	local properties = {[cfg.keywords_t.affirmative] = 'italic', [cfg.keywords_t.negative] = 'normal', [cfg.keywords_t.unset] = 'inherit', [cfg.keywords_t.invert] = 'invert', [cfg.keywords_t.default] = nil}; 	 	local count = 0 	for _, arg in pairs {'italic', 'italics', 'i'} do 		if args[arg] then 			count = count + 1 		end 	end  	if count > 1 then															-- return nil and an error message if more than one is set  		return nil, cfg.validate_italic_t.multi_italic; 	end 	 	return properties[args.italic or args.italics or args.i], nil;				-- return an appropriate value and a nil error message end  --[=[--------------------------< V A L I D A T E _ C A T _ A R G S >----------------------------------------------------------  Default behavior of the  and  templates is to add categorization when the templates are used in main space. This default functionality may be suppressed by setting |nocat=yes or |cat=no.  This function selects one of these two parameters to control categorization.  Because having two parameters with 'opposite' names and 'opposite' values is confusing, this function accepts only affirmative values for |nocat= and only negative values for |cat=; in both cases the 'other' sense (and non-sense) is not accepted and the parameter is treated as if it were not set in the template.  Sets args.nocat to true if categorization is to be turned off; to nil if the default behavior should apply.  Accepted values for |nocat= are the text strings: 	'yes', 'y', 'true', 't', on, '1'		-- Module:Yesno returns logical true for all of these; false or nil else for |cat= 	'no', 'n', 'false', 'f', 'off', '0'		-- Module:Yesno returns logical false for all of these; true or nil else  ]=]  local function validate_cat_args (args) 	if not (args.nocat or args.cat) then										-- both are nil, so categorize 		return; 	end 	 	if false == yesno (args.cat) or true == yesno (args.nocat) then 		args.nocat = true;														-- set to true when args.nocat is affirmative; nil else (as if the parameter were not set in the template) 	else																		-- args.nocat is the parameter actually used. 		args.nocat = nil; 	end end  --[[--------------------------< I N _ A R R A Y >--------------------------------------------------------------  Whether needle is in haystack.  ]]  local function in_array (needle, haystack) 	if needle == nil then 		return false; 	end 	for n,v in ipairs (haystack) do 		if v == needle then 			return n; 		end 	end 	return false; end  --[[--------------------------< F O R M A T _ I E T F _ T A G >------------------------------------------------  Prettify IETF tags to use recommended subtag formats: 	code: lower case 	script: sentence case 	region: upper case 	variant: lower case 	private: lower case prefixed with -x- 	 ]]  local function format_ietf_tag (code, script, region, variant, private) 	local out = {};  	if is_set (private) then 		return table.concat ({code:lower(), 'x', private:lower()}, '-');		-- if private, all other tags ignored 	end 	 	table.insert (out, code:lower()); 	if is_set (script) then 		script = script:lower():gsub ('^%a', string.upper); 		table.insert (out, script); 	end  	if is_set (region) then 		table.insert (out, region:upper()); 	end 	 	if is_set (variant) then 		table.insert (out, variant:lower()); 	end 	 	return table.concat (out, '-'); end  --[[--------------------------< G E T _ I E T F _ P A R T S >--------------------------------------------------  Extracts and returns IETF language tag parts: 	primary language subtag (required) - 2 or 3 character IANA language code 	script subtag - four character IANA script code 	region subtag - two-letter or three digit IANA region code 	variant subtag - four digit or 5-8 alnum variant code; only one variant subtag supported 	private subtag - x- followed by 1-8 alnum private code; only supported with the primary language tag  in any one of these forms 	lang					lang-variant 	lang-script				lang-script-variant 	lang-region				lang-region-variant 	lang-script-region		lang-script-region-variant 	lang-x-private	 	 each of lang, script, region, variant, and private, when used, must be valid.  Languages with both two- and three-character code synonyms are promoted to the two-character synonym because the IANA registry file omits the synonymous three-character code; we cannot depend on browsers understanding the synonymous three-character codes in the lang= attribute.  For  templates, the parameters |script=, |region=, and |variant= are supported (not supported in  because those parameters are superfluous to the IETF subtags in |code=).  Returns six  values; all lower case.  Valid parts are returned as themselves; omitted parts are returned as empty strings, invalid parts are returned as nil; the sixth returned item is an error message (if an error detected) or nil.  See http://www.rfc-editor.org/rfc/bcp/bcp47.txt section 2.1. 	 ]]  local function get_ietf_parts (source, args_script, args_region, args_variant) 	local code, script, region, variant, private;								-- IETF tag parts  	if not is_set (source) then 		return nil, nil, nil, nil, nil, cfg.get_ietf_parts_t.missing_lang_tag; 	end  	local pattern = {															-- table of tables holding acceptable IETF tag patterns and short names of the IETF part captured by the pattern 		{'^(%a%a%a?)%-(%a%a%a%a)%-(%a%a)%-(%d%d%d%d)$', 's', 'r', 'v'}, 				-- 1 -  ll-Ssss-RR-variant (where variant is 4 digits) 		{'^(%a%a%a?)%-(%a%a%a%a)%-(%d%d%d)%-(%d%d%d%d)$', 's', 'r', 'v'},				-- 2 -  ll-Ssss-DDD-variant (where region is 3 digits; variant is 4 digits) 		{'^(%a%a%a?)%-(%a%a%a%a)%-(%a%a)%-(%w%w%w%w%w%w?%w?%w?)$', 's', 'r', 'v'},		-- 3 -  ll-Ssss-RR-variant (where variant is 5-8 alnum characters) 		{'^(%a%a%a?)%-(%a%a%a%a)%-(%d%d%d)%-(%w%w%w%w%w%w?%w?%w?)$', 's', 'r', 'v'},	-- 4 -  ll-Ssss-DDD-variant (where region is 3 digits; variant is 5-8 alnum characters) 		 		{'^(%a%a%a?)%-(%a%a%a%a)%-(%d%d%d%d)$', 's', 'v'},						-- 5 -  ll-Ssss-variant (where variant is 4 digits) 		{'^(%a%a%a?)%-(%a%a%a%a)%-(%w%w%w%w%w%w?%w?%w?)$', 's', 'v'},			-- 6 -  ll-Ssss-variant (where variant is 5-8 alnum characters) 		 		{'^(%a%a%a?)%-(%a%a)%-(%d%d%d%d)$', 'r', 'v'},							-- 7 -  ll-RR-variant (where variant is 4 digits) 		{'^(%a%a%a?)%-(%d%d%d)%-(%d%d%d%d)$', 'r', 'v'},						-- 8 -  ll-DDD-variant (where region is 3 digits; variant is 4 digits) 		{'^(%a%a%a?)%-(%a%a)%-(%w%w%w%w%w%w?%w?%w?)$', 'r', 'v'},				-- 9 -  ll-RR-variant (where variant is 5-8 alnum characters) 		{'^(%a%a%a?)%-(%d%d%d)%-(%w%w%w%w%w%w?%w?%w?)$', 'r', 'v'},				-- 10 - ll-DDD-variant (where region is 3 digits; variant is 5-8 alnum characters) 		 		{'^(%a%a%a?)%-(%d%d%d%d)$', 'v'},										-- 11 - ll-variant (where variant is 4 digits) 		{'^(%a%a%a?)%-(%w%w%w%w%w%w?%w?%w?)$', 'v'},							-- 12 - ll-variant (where variant is 5-8 alnum characters) 		 		{'^(%a%a%a?)%-(%a%a%a%a)%-(%a%a)$', 's', 'r'},							-- 13 - ll-Ssss-RR 		{'^(%a%a%a?)%-(%a%a%a%a)%-(%d%d%d)$', 's', 'r'},						-- 14 - ll-Ssss-DDD (region is 3 digits) 		 		{'^(%a%a%a?)%-(%a%a%a%a)$', 's'},										-- 15 - ll-Ssss 		 		{'^(%a%a%a?)%-(%a%a)$', 'r'},											-- 16 - ll-RR 		{'^(%a%a%a?)%-(%d%d%d)$', 'r'},											-- 17 - ll-DDD (region is 3 digits) 		 		{'^(%a%a%a?)$'},														-- 18 - ll 		 		{'^(%a%a%a?)%-x%-(%w%w?%w?%w?%w?%w?%w?%w?)$', 'p'},						-- 19 - ll-x-pppppppp (private is 1-8 alnum characters) 		}  	local t = {};																-- table of captures; serves as a translator between captured IETF tag parts and named variables  	for i, v in ipairs (pattern) do												-- spin through the pattern table looking for a match 		local c1, c2, c3, c4;													-- captures in the 'pattern' from the pattern table go here 	 		c1, c2, c3, c4 = source:match (pattern[i][1]);							-- one or more captures set if source matches pattern[i]) 			if c1 then															-- c1 always set on match 				code = c1;														-- first capture is always code 				t = { 					[pattern[i][2] or 'x'] = c2,								-- fill the table of captures with the rest of the captures 					[pattern[i][3] or 'x'] = c3,								-- take index names from pattern table and assign sequential captures 					[pattern[i][4] or 'x'] = c4,								-- index name may be nil in pattern[i] table so "or 'x'" spoofs a name for this index in this table 					}; 				script = t.s or ;												-- translate table contents to named variables; 				region = t.r or ;												-- absent table entries are nil so set named IETF parts to empty string for concatenation 				variant= t.v or ; 				private = t.p or ; 				break;															-- and done 			end 	end  	if not code then 		return nil, nil, nil, nil, nil, substitute (cfg.get_ietf_parts_t.unrecog_tag, {source});	-- don't know what we got but it is malformed 	end  	code = code:lower();														-- ensure that we use and return lower case version of this 	 	if not (override_table[code] or lang_table[code] or synonym_table[code] or lang_dep_table[code]) then 		return nil, nil, nil, nil, nil, substitute (cfg.get_ietf_parts_t.unrecog_code, {code});		-- invalid language code, don't know about the others (don't care?) 	end  	if synonym_table[code] then													-- if 639-2/639-2T code has a 639-1 synonym 		table.insert (maint_cats, substitute (cfg.get_ietf_parts_t.maint_promo_cat, {code})); 		table.insert (maint_msgs, substitute (cfg.get_ietf_parts_t.maint_promo_msg, {code, synonym_table[code]})); 		code = synonym_table[code];												-- use the synonym 	end  	if is_set (script) then 		if is_set (args_script) then 			return code, nil, nil, nil, nil, cfg.get_ietf_parts_t.redundant_scr;	-- both code with script and |script= not allowed 		end 	else 		script = args_script or ;												-- use args.script if provided 	end   	if is_set (script) then 		script = script:lower();												-- ensure that we use and return lower case version of this 		if not script_table[script] then 			return code, nil, nil, nil, nil, substitute (cfg.get_ietf_parts_t.unrecog_scr_code, {script, code});	-- language code OK, invalid script, don't know about the others (don't care?) 		end 	end 	if suppressed_table[script] then											-- ensure that code-script does not use a suppressed script 		if in_array (code, suppressed_table[script]) then 			return code, nil, nil, nil, nil, substitute (cfg.get_ietf_parts_t.script_code, {script, code});	-- language code OK, script is suppressed for this code 		end 	end  	if is_set (region) then 		if is_set (args_region) then 			return code, nil, nil, nil, nil, cfg.get_ietf_parts_t.redundant_reg;	-- both code with region and |region= not allowed 		end 	else 		region = args_region or ;												-- use args.region if provided 	end   	if is_set (region) then 		region = region:lower();												-- ensure that we use and return lower case version of this 		if not region_table[region] then 			return code, script, nil, nil, nil, substitute (cfg.get_ietf_parts_t.unrecog_reg_code, {region, code}); 		end 	end 	 	if is_set (variant) then 		if is_set (args_variant) then 			return code, nil, nil, nil, nil, cfg.get_ietf_parts_t.redundant_var;	-- both code with variant and |variant= not allowed 		end 	else 		variant = args_variant or ;											-- use args.variant if provided 	end   	if is_set (variant) then 		variant = variant:lower();												-- ensure that we use and return lower case version of this 		if not variant_table[variant] then										-- make sure variant is valid 			return code, script, region, nil, nil, substitute (cfg.get_ietf_parts_t.unrecog_var, {variant}); 		end																		-- does this duplicate/replace tests in lang() and lang_xx()? 		if is_set (script) then													-- if script set it must be part of the 'prefix' 			if not in_array (table.concat ({code, '-', script}), variant_table[variant]['prefixes']) then 				return code, script, region, nil, nil, substitute (cfg.get_ietf_parts_t.unrecog_var_code_scr, {variant, code, script}); 			end 		elseif is_set (region) then												-- if region set, there are some prefixes that require lang code and region (en-CA-newfound) 			if not in_array (code, variant_table[variant]['prefixes']) then		-- first see if lang code is all that's required (en-oxendict though en-GB-oxendict is preferred) 				if not in_array (table.concat ({code, '-', region}), variant_table[variant]['prefixes']) then		-- now try for lang code and region (en-CA-newfound) 					return code, script, region, nil, nil, substitute (cfg.get_ietf_parts_t.unrecog_var_code_reg, {variant, code, region}); 				end 			end 		else																	-- cheap way to determine if there are prefixes; fonipa and others don't have prefixes; # operator always returns 0 			if variant_table[variant]['prefixes'][1] and not in_array (code, variant_table[variant]['prefixes']) then 				return code, script, region, nil, nil, substitute (cfg.get_ietf_parts_t.unrecog_var_code, {variant, code}); 			end 		end 	end  	if is_set (private) then 		private = private:lower();												-- ensure that we use and return lower case version of this 		if not override_table[table.concat ({code, '-x-', private})] then		-- make sure private tag is valid; note that index  			return code, script, region, nil, nil, substitute (cfg.get_ietf_parts_t.unrecog_pri, {private}); 		end 	end 	return code, script, region, variant, private, nil;							-- return the good bits; make sure that msg is nil end  --[=[-------------------------< M A K E _ W I K I L I N K >----------------------------------------------------  Makes a wikilink; when both link and display text is provided, returns a wikilink in the form D; if only link is provided, returns a wikilink in the form L; if neither are provided or link is omitted, returns an empty string.  ]=]  local function make_wikilink (link, display) 	if is_set (link) then 		if is_set (display) then 			return table.concat ({'', display, ''}); 		else 			return table.concat ({'', link, ''}); 		end 	else 		return ; 	end end  --[[--------------------------< D I V _ M A R K U P _ A D D >--------------------------------------------------  Adds  and  tags to list-item text or to implied .. text. Mixed not supported.  ]]  local function div_markup_add (text, style) 	if text:find ('^\n[%*:;#]') then											-- look for list markup; list markup must begin at start of text 		if 'italic' == style then 			return text:gsub ('(\n[%*:;#]+)([^\n]+)', '%1%2');			-- insert italic markup at each list item 		else 			return text; 		end 	end  	if text:find ('\n+') then													-- look for any number of \n characters in text 		text = text:gsub ('([^\n])\n([^\n])', '%1 %2');							-- replace single newline characters with a space character which mimics MediaWiki  		if 'italic' == style then 			text = text:gsub('[^\n]+', '%1');						-- insert p and italic markup tags at each implied p (two or more consecutive '\n\n' sequences) 		else 			text = text:gsub ('[^\n]+', '%1');							-- insert p markup at each implied p 			text = text:gsub ('\n', );										-- strip newline characters 		end 	end  	return text; end  --[[--------------------------< T I T L E _ W R A P P E R _ M A K E >------------------------------------------  Makes a <content_text> or <content_text> where <title text> is in the tool-tip in the wiki's local language and <content_text> is non-local-language text in HTML markup.  This because the lang= attribute applies to the content of its enclosing tag.  <tag> holds a string 'div' or 'span' used to choose the correct wrapping tag.  ]]  local function title_wrapper_make (title_text, content_text, tag) 	local wrapper_t = {}; 	 	table.insert (wrapper_t, table.concat ({'<', tag}));						-- open opening wrapper tag 	table.insert (wrapper_t, ' title=\"');										-- begin title attribute 	table.insert (wrapper_t, title_text);										-- add <title_text> 	table.insert (wrapper_t, '\">');											-- end title attribute and close opening wrapper tag 	table.insert (wrapper_t, content_text);										-- add <content_text> 	table.insert (wrapper_t, table.concat ({'</', tag, '>'}));					-- add closing wrapper tag  	return table.concat (wrapper_t);											-- make a big string and done end  --[[--------------------------< M A K E _ T E X T _ H T M L >--------------------------------------------------  Add the HTML markup to text according to the type of content that it is: <span> or <i> tags for inline content or <div> tags for block content  The lang= attribute also applies to the content of the tag where it is placed so this is wrong because 'Spanish language text' is English: 	casa should be: 	casa or for ...: 	<spanish-language-text>  ]]  local function make_text_html (code, text, tag, rtl, style, size, language) 	local html_t = {}; 	local style_added = ; 	local wrapper_tag = tag;													-- <tag> gets modified so save a copy for use when/if we create a wrapper span or div  	if text:match ('^%*') then 		table.insert (html_t, '*');											-- move proto language text prefix outside of italic markup if any; use numeric entity because plain splat confuses MediaWiki 		text = text:gsub ('^%*', );											-- remove the splat from the text 	end  	if 'span' == tag then														-- default HTML tag for inline content 		if 'italic' == style then												-- but if italic 			tag = 'i';															-- change to <i> tags 		end 	else																		-- must be div so go 		text = div_markup_add (text, style);									-- handle implied <p>, implied <p> with <i>, and list markup (*;:#) with <i> 	end  	table.insert (html_t, table.concat ({'<', tag}));							-- open the <i>, <span>, or <div> HTML tag 	code = code:gsub ('%-x%-.*', );											-- strip private use subtag from code tag because meaningless outside of Wikipedia 	table.insert (html_t, table.concat ({' lang="', code, '\"'}));				-- add language attribute  	if (rtl or unicode.is_rtl(text)) and ('ltr' == this_wiki_lang_dir) then		-- text is right-to-left on a left-to-right wiki 		table.insert (html_t, ' dir="rtl"');									-- add direction attribute for right-to-left languages 	elseif not (rtl or unicode.is_rtl(text)) and ('rtl' == this_wiki_lang_dir) then	-- text is left-to-right on a right-to-left wiki 		table.insert (html_t, ' dir="ltr"');									-- add direction attribute for left-to-right languages 	end  	if 'normal' == style then													-- when |italic=no 		table.insert (html_t, ' style=\"font-style: normal;');					-- override external markup, if any 		style_added = '\"';														-- remember that style attribute added and is not yet closed 	end  	if is_set (size) then														-- when |size=<something> 		if is_set (style_added) then 			table.insert (html_t, table.concat ({' font-size: ', size, ';'}));	-- add when style attribute already inserted 		else 			table.insert (html_t, table.concat ({' style=\"font-size: ', size, ';'}));	-- create style attribute 			style_added = '\"';													-- remember that style attribute added and is not yet closed 		end 	end  	table.insert (html_t, table.concat ({style_added, '>'}));					-- close the opening HTML tag 	table.insert (html_t, text);												-- insert the text  	table.insert (html_t, table.concat ({'</', tag, '>'}));						-- close the 'text' <i>, <span>, or <div> HTML tag  	if is_set (language) then													-- create a <title_text> string for the title= attribute in a wrapper span or div 		local title_text; 			if 'zxx' == code then												-- special case for this tag 'no linguistic content' 				title_text = substitute ('$1 $2', {language, cfg.make_text_html_t.zxx});	-- not a language so don't use 'language' in title text 			elseif mw.ustring.find (language, 'languages', 1, true) then 				title_text = substitute ('$1 $2', {language, cfg.make_text_html_t.collective});	-- for collective languages 			else 				title_text = substitute ('$1-$2', {language, cfg.make_text_html_t.individual});	-- for individual languages 			end  		return title_wrapper_make (title_text, table.concat (html_t), wrapper_tag); 	else 		return table.concat (html_t); 	end end  --[=[-------------------------< M A K E _ C A T E G O R Y >----------------------------------------------------  For individual language, <language>, returns: 	[[Category:Articles containing <language>-language text]]  For English: 	Category:Articles containing explicitly cited English-language text 	 For ISO 639-2 collective languages (and for 639-1 bh): 	[[Category:Articles with text in <language> languages]]  ]=]  local function make_category (code, language_name, nocat, name_get) 	if ((0 ~= namespace) or nocat) and not name_get then						-- only categorize in article space 		return ;																-- return empty string for concatenation 	end  	if mw.ustring.find (language_name, 'languages', 1, true) then 		return substitute ('$1 $2', {cfg.make_category_t.collective_cat, language_name}); 	end 		 	if this_wiki_lang_tag == code then 		return substitute ('$1 $2 $3-$4', {									-- unique category name for the local language 			cfg.make_category_t.cat_prefix, 			cfg.make_category_t.explicit_cat, 			language_name, 			cfg.make_category_t.cat_postfix, 			}); 	else 		return substitute ('$1 $2-$3', {									-- category for individual languages 			cfg.make_category_t.cat_prefix, 			language_name, 			cfg.make_category_t.cat_postfix, 			}); 	end end  --[[--------------------------< M A K E _ T R A N S L I T >----------------------------------------------------  Return translit ... where xx is the language code; else return empty string.  The value |script= is not used in  for this purpose; instead it uses |code.  Because language scripts are listed in the  switches they are included in the data tables.  The script parameter is introduced at .  If |script= is set, this function uses it in preference to code.  To avoid confusion, in this module and the templates that use it, the transliteration script parameter is renamed to be |translit-script= (in this function, tscript).  This function is used by both lang_xx() and xlit() 	lang_xx() always provides code, language_name, and translit; may provide tscript; never provides style 	xlit() always provides language_name, translit, and one of code or tscript, never both; always provides style  For , style only applies when a language code is provided.  ]]  local function make_translit (code, language_name, translit, std, tscript, style, engvar) 	local title_t = lang_data.translit_title_table;								-- table of transliteration standards and the language codes and scripts that apply to those standards 	local title_text = ;														-- tool tip text for title= attribute 	 	std = std and std:lower();													-- lower case for table indexing 	 	if not is_set (std) and not is_set (tscript) then							-- when neither standard nor script specified 		title_text = language_name;												-- write a generic tool tip 		if not mw.ustring.find (language_name, 'languages', 1, true) then		-- collective language names (plural 'languages' is part of the name) 			title_text = substitute ('$1-$2', {title_text, cfg.misc_text_t.language});	-- skip this text (individual and macro languages only) 		end 		title_text = substitute ('$1 $2', {title_text, mw.ustring.lower (cfg.engvar_t[engvar]['romanisz_lc'])});	-- finish the tool tip; use romanization when neither script nor standard supplied  	elseif is_set (std) and is_set (tscript) then								-- when both are specified 		if title_t[std] then													-- and if standard is legitimate 			if title_t[std][tscript] then										-- and if script for that standard is legitimate 				if script_table[tscript] then 					title_text = substitute ('$1$2 ($3 $4) $5', {				-- add the appropriate text to the tool tip 						title_text, 						title_t[std][tscript:lower()], 						script_table[tscript], 						cfg.make_translit_t.script, 						cfg.make_translit_t.transliteration, 						}); 				else 					title_text = title_text .. title_t[std]['default'];			-- use the default if script not in std table; TODO: maint cat? error message because script not found for this standard? 				end 			else 				title_text = title_text .. title_t[std]['default'];				-- use the default if script not in std table; TODO: maint cat? error message because script not found for this standard? 			end 		else 			return ;															-- invalid standard, setup for error message 		end  	elseif is_set (std) then													-- translit-script not set, use language code 		if not title_t[std] then return ; end									-- invalid standard, setup for error message 		 		if title_t[std][code] then												-- if language code is in the table (xlit may not provide a language code) 			title_text = substitute ('$1$2 ($3 $4) $5', {						-- add the appropriate text to the tool tip 				title_text, 				title_t[std][code:lower()], 				language_name, 				cfg.misc_text_t.language, 				cfg.make_translit_t.transliteration, 				}); 		else																	-- code doesn't match 			title_text = title_text .. title_t[std]['default'];					-- so use the standard's default 		end  	else																		-- here if translit-script set but translit-std not set 		if title_t['no_std'][tscript] then 			title_text = title_text .. title_t['no_std'][tscript];				-- use translit-script if set 		elseif title_t['no_std'][code] then 			title_text = title_text .. title_t['no_std'][code];					-- use language code 		else 			if is_set (tscript) then 				title_text = substitute ('$1$2-$3 $4', {						-- write a script tool tip 					title_text, 					language_name, 					cfg.make_translit_t.script, 					cfg.make_translit_t.transliteration, 					});  			elseif is_set (code) then 				if not mw.ustring.find (language_name, 'languages', 1, true) then	-- collective language names (plural 'languages' is part of the name) 					title_text = substitute ('$1-$2', {							-- skip this text (individual and macro languages only) 						title_text, 						cfg.misc_text_t.language, 						}); 				end 					title_text = substitute ('$1 $2', {							-- finish the tool tip 						title_text, 						cfg.make_translit_t.transliteration, 						}); 			else 					title_text = substitute ('$1 $2', {							-- generic tool tip (can we ever get here?) 						title_text, 						cfg.make_translit_t.transliteration, 						}); 			end 		end 	end  	local tag 	if is_set (code) then														-- when a language code is provided (always with  templates, not always with ) 		code = code:match ('^(%a%a%a?)');										-- strip all subtags leaving only the language subtag 		if not style then														-- nil for the default italic style 			tag = '%s' 		else 			tag = '%s'		-- non-standard style, construct a span tag for it 			tag = string.format(tag, style, "%s", "%s") 		end 		tag = string.format(tag, code, "%s") 	else 		tag = '%s'													-- when no language code: no lang= attribute, not italic ( only) 	end 	 	tag = string.format(tag, translit)											-- add the translit text 	if  == title_text then													-- when there is no need for a tool-tip 		return tag;																-- done 	else 		title_text = cfg.engvar_sel_t.gb == engvar and title_text:gsub ('([Rr]omani)z', '%1s') or title_text;	-- gb eng when engvar specifies gb eng; us eng else 		return title_wrapper_make (title_text, tag, 'span');					-- wrap with a tool-tip span and done 	end end  --[[--------------------------< V A L I D A T E _ T E X T >----------------------------------------------------  This function checks the content of args.text and returns empty string if nothing is amiss else it returns an error message. The tests are for empty or missing text and for improper or disallowed use of apostrophe markup.  Italic rendering is controlled by the |italic= template parameter so italic markup should never appear in args.text either as itself or as bold italic unless |italic=unset or |italic=invert.  ]]  local function validate_text (template, args) 	if not is_set (args.text) then 		return make_error_msg (cfg.validate_text_t.no_text, args, template); 	end  	if args.text:find ("%f[\']\'\'\'\'%f[^\']") or args.text:find ("\'\'\'\'\'[\']+") then	-- because we're looking, look for 4 appostrophes or 6+ appostrophes 		return make_error_msg (cfg.validate_text_t.malformed_markup, args, template); 	end  	local style = args.italic;  	if (cfg.keywords_t.unset ~= style) and (cfg.keywords_t.invert ~=style) then 		if args.text:find ("%f[\']\'\'%f[^\']") or args.text:find ("%f[\']\'\'\'\'\'%f[^\']") then	-- italic but not bold, or bold italic 			return make_error_msg (cfg.validate_text_t.italic_markup, args, template); 		end 	end end  --[[--------------------------< R E N D E R _ M A I N T >------------------------------------------------------  Render mainenance messages and categories.  ]]  local function render_maint (nocat) 	local maint = {}; 	 	if 0 < #maint_msgs then														-- when there are maintenance messages 		table.insert (maint, table.concat ({'<span class="lang-comment" style="font-style: normal; display: none; color: #33aa33; margin-left: 0.3em;">'}));	-- opening  tag 		for _, msg in ipairs (maint_msgs) do 			table.insert (maint, table.concat ({msg, ' '}));					-- add message strings 		end 		table.insert (maint, '');										-- close the span 	end 	 	if (0 < #maint_cats) and (0 == namespace) and not nocat then				-- when there are maintenance categories; article namespace only 		for _, cat in ipairs (maint_cats) do 			table.insert (maint, table.concat ({'Category:', cat, ''}));	-- format and add the categories 		end 	end 	 	return table.concat (maint); end  --[[--------------------------< P R O T O _ P R E F I X >------------------------------------------------------  For proto languages, text is prefixed with a splat. We do that here as a flag for make_text_html() so that a splat will be rendered outside of italic markup (if used). If the first character in text here is already a splat, we do nothing.  proto_param is boolean or nil; true adds splat prefix regardless of language name; false removes and inhibits regardless of language name; nil does nothing; presumes that the value in text is correct but removes extra splac.  ]]  local function proto_prefix (text, language_name, proto_param) 	if false == proto_param then												-- when forced by |proto=no 		return text:gsub ('^%**', );											-- return text without splat prefix regardless of language name or existing splat prefix in text 	elseif (language_name:find ('^Proto%-') or (true == proto_param)) then		-- language is a proto or forced by |proto=yes 		return text:gsub ('^%**', '*');											-- prefix proto-language text with a splat; also removes duplicate prefixing splats 	end 	 	return text:gsub ('^%*+', '*');												-- return text unmolested except multiple splats reduced to one splat end  --[[--------------------------< H A S _ P O E M _ T A G >------------------------------------------------------  Looks for a poem strip marker in text; returns true when found; false else.  Auto-italic detection disabled when text has poem stripmarker because it is not possible for this code to know the content that will replace the stripmarker.  ]]  local function has_poem_tag (text) 	return text:find ('\127[^\127]*UNIQ%-%-poem%-[%a%d]+%-QINU[^\127]*\127') and true or false; end  --[[--------------------------< H T M L _ T A G _ S E L E C T >------------------------------------------------  Inspects content of and selectively trims text.  Returns text and the name of an appropriate HTML tag for text.  If text contains: 	\n\n	text has implied .. tags - trim leading and trailing whitespace and return  If text begins with list markup: 	\n*		unordered 	\n;		definition 	\n:		definition 	\n#		ordered trim all leading whitespace except  \n and trim all trailing whitespace  If text contains ... stripmarker, return text unmodified and choose .. tags because  the stripmarker is replaced with text wrapped in .. tags.  If the text contains any actual ... tags, then it's again returned unmodified and ... tags are used to wrap it, to prevent div/span inversion.  ]]  local function html_tag_select (text) 	local tag; 	 	if has_poem_tag (text) then													-- contains poem stripmarker (we can't know the content of that) 		tag = 'div';															-- poem replacement is in div tags so lang must use div tags 	elseif text:find ('<div') then												-- reductive; if the text contains a div tag, we must use div tags 		tag = 'div'; 	elseif mw.text.trim (text):find ('\n\n+') then								-- contains implied p tags 		text = mw.text.trim (text);												-- trim leading and trailing whitespace characters 		tag = 'div';															-- must be div because span may not contain p tags (added later by MediaWiki); poem replacement is in div tags 	elseif text:find ('\n[%*:;%#]') then										-- if text has list markup 		text = text:gsub ('^[\t\r\f ]*', ):gsub ('%s*$', );					-- trim all whitespace except leading newline character '\n' 		tag = 'div';															-- must be div because span may not contain ul, dd, dl, ol tags (added later by MediaWiki) 	else 		text = mw.text.trim (text);												-- plain text 		tag = 'span';															-- so span is fine 	end 	 	return text, tag; end  --[[--------------------------< V A L I D A T E _ P R O T O >--------------------------------------------------  Validates value assigned to |proto=; permitted values are yes and no; yes returns as true, no returns as false, empty string (or parameter omitted) returns as nil; any other value returns nil with <proto_param> as second return value for use in error message.  ]]  local function validate_proto (proto_param) 	if cfg.keywords_t.affirmative == proto_param then 		return true; 	elseif cfg.keywords_t.negative == proto_param then 		return false; 	elseif is_set (proto_param) then 		return nil, proto_param;												-- |proto= something other than 'yes' or 'no' 	else 		return nil;																-- missing or empty 	end end  --[[--------------------------< L A N G U A G E _ N A M E _ G E T >--------------------------------------------  Common function to return language name from the data set according to IETF tag.  Returns language name if found in data tables; nil else.  ]]  local function language_name_get (ietf, code, cat) 	ietf = ietf:lower();														-- ietf:lower() because format_ietf_tag() returns mixed case 	 	local name;																	-- remains nil if not found 	 	if override_table[ietf] then												-- look for whole IETF tag in override table 		name = override_table[ietf]; 	elseif override_table[code] then											-- not there so try basic language tag 		name = override_table[code]; 	elseif lang_table[code] then												-- shift to IANA active tag/name table 		name = lang_table[code]; 	elseif lang_dep_table[code] then											-- try the IANA deprecated tag/name table 		name = lang_dep_table[code]; 	end  	if lang_dep_table[code] and cat then										-- because deprecated code may have been overridden to en.wiki preferred name 		table.insert (maint_cats, substitute (cfg.language_name_get_t.deprecated_cat, {code})); 		table.insert (maint_msgs, substitute (cfg.language_name_get_t.deprecated_msg, {code})); 	end  	return name;																-- name from data tables or nil end  --[[--------------------------< T E X T _ S C R I P T _ M A T C H _ T E S T >----------------------------------  IETF script subtag should match the script of the <text>.  This module does not attempt to know all scripts and what they look like.  It does know what Latn script looks like so when <text> is written using other than the Latn script, the IETF script subtag, if present, should not be Latn.  Conversely, when <text> is written using the Latn script, the IETF script subtag, if present, should be Latn.  For the purposes of this test, Latf (Fraktur) and Latg (Gaelic) are considered to be equivalent to Latn because unicode treats these two scripts as font-specific variants of Latn.  Returns an error message when mismatch detected; nil else.  ]]  local function text_script_match_test (script, is_latn_text, pos, char) 	local scripts_t = {['latf'] = true, ['latg'] = true, ['latn'] = true};		-- unicode 'latn' scripts; 'latf' and 'latg' are font variants so there are no Fraktur or Gaelic codepoints 	if is_set (script) then														-- don't bother with the rest of this if <script> is nil or empty string 		script = script:lower();												-- lower case to index into <scripts_t> 		if is_latn_text then													-- when text is wholly Latn script 			if not scripts_t[script] then										-- but a non-Latn script is specified 				return cfg.text_script_match_test_t.latn_txt_mismatch;			-- emit an error message 			end 		else																	-- when text is not wholly Latn script 			if scripts_t[script] then											-- but a Latn script is specified 				return substitute (cfg.text_script_match_test_t.latn_scr_mismatch, {pos, char});	-- emit an error message with position of first offending character 			end 		end 	end end  --[[--------------------------< B I N A R Y _ S E A R C H >---------------------------------------------------  conducts a binary search of <ranges_t> for a sub-range that holds <target>.  returns boolean true if a sub-range holding <target> is found; boolean false else.  ]]  local function binary_search (target, ranges_t) 	local idx_bot = 1;															-- initialize to index of first key 	local idx_top = sizeof_ranges_t;											-- initialize to index of last key (number of keys)  	if (target < ranges_t[idx_bot][1]) or (target > ranges_t[idx_top][2]) then	-- invalid; target out of range 		return;																	-- abandon 	end  	local idx_mid;																-- calculated index of range midway between top index and bottom index 	local flag = false;															-- flag to tell us when we've evaluated last (highest) range in <ranges_t>  	while 1 do 		idx_mid = math.ceil ((idx_bot + idx_top) / 2);							-- get the mid-point in the <ranges_t> sequence 		if (target >= ranges_t[idx_mid][1]) and (target <= ranges_t[idx_mid][2]) then		-- indexed range low value <= target <= indexed range high value 			return true;														-- we found the range that holds the <target> character; return true 		 		elseif (target > ranges_t[idx_mid][2]) then								-- is <target> > indexed range high value? 			idx_bot = idx_mid;													-- adjust <idx_bot> up  		else																	-- here when <target> less than indexed range low value 			idx_top = idx_mid - 1;												-- adjust <idx_top> down 		end  		if flag then 			break;																-- here when we just evaluated the last range and <target> not found 		end 	 		if not flag and (idx_bot == idx_top) then								-- set true just before we evaluate the last (highest) range in <ranges_t> 			flag = true; 		end 	end end  --[[--------------------------< I S _ L A T I N >--------------------------------------------------------------  compare <text> as codepoints to lists of known codepoints accepted as Latn script  returns boolean true and modified <text> when <text> is wrapped in accept-as-written markup  returns boolean true and <text> when codepoint is known  returns boolean false, <text>, non-Latn codepoint position in <text> (left to right), and the codepoint character 	when codepoint is not known  TODO: when text has accept-as-written markup, return a non-boolean value to indicate that <text> is not wholly 	latn script?  Use that return value to create non-Latn HTML lang= attribute because <text> isn't really 	latn so lang=und (undetermined)? or instead, omit the -Latn subtag? (without -Latn need to force |italic=yes)  ]]  local function is_latin (text, tag) 	local count; 	text, count = text:gsub ('^%(%((.+)%)%)$', '%1');							-- remove accept-as-written markup if present 	if 0 ~= count then 		return true, text;														-- markup present so assume that <text> is Latn-script 	end  	local pos = 0;																-- position counter for error messaging 	for codepoint in mw.ustring.gcodepoint (text) do							-- fetch each code point 		pos = pos + 1;															-- bump the position counter  		if not is_latn_data.singles_t[codepoint] and							-- codepoint not found in the singles list? 			not binary_search (codepoint, is_latn_data.ranges_t) and			-- codepoint not a member of a listed range? 			not (tag and is_latn_data.specials_t[codepoint] and is_latn_data.specials_t[codepoint][tag]) then	-- not a language-specific codepoint? 				return false, text, pos, mw.ustring.char (codepoint);			-- codepoint not known; return false with codepoint position and character representation 		end 	end 	return true, text;															-- is known; return <text> end  --[[--------------------------< _ L A N G >--------------------------------------------------------------------  Entry point for .  There should be no reason to set parameters in the   	  Parameters are received from the template's frame (parent frame).  ]]  local function _lang (args) 	local out = {}; 	local language_name;														-- used to make category names 	local category_name;														-- same as language_name except that it retains any parenthetical disambiguators (if any) from the data set 	local subtags = {};															-- IETF subtags script, region, variant, and private 	local code;																	-- the language code 	local msg;																	-- for error messages 	local tag = 'span';															-- initial value for make_text_html() 	local template = args.template or cfg.templates_t.lang;  	maint_cats = {};															-- initialize because when this module required into another module, these only declared once so only initialzed once 	maint_msgs = {}; 	 	validate_cat_args (args);													-- determine if categorization should be suppressed  	if args[1] and args.code then 		return make_error_msg (substitute (cfg.lang_t.conflict_n_param, {'1', cfg.lang_t.conflict_n_param_types.code}), args, template); 	else 		args.code = args[1] or args.code;										-- prefer args.code 	end  	if args[2] and args.text then 		return make_error_msg (substitute (cfg.lang_t.conflict_n_param, {'2', cfg.lang_t.conflict_n_param_types.text}), args, template); 	else 		args.text = args[2] or args.text;										-- prefer args.text 	end  	msg = validate_text (template, args);										-- ensure that |text= is set 	if is_set (msg) then														-- msg is an already-formatted error message 		return msg; 	end 	 	args.text, tag = html_tag_select (args.text);								-- inspects text; returns appropriate HTML tag with text trimmed accordingly  	args.rtl = args.rtl == cfg.keywords_t.affirmative;							-- convert to boolean: 'yes' -> true, other values -> false  	args.proto, msg = validate_proto (args.proto);								-- return boolean, or nil, or nil and error message flag 	if msg then 		return make_error_msg (substitute (cfg.lang_t.invalid_proto, {msg}), args, template); 	end  	code, subtags.script, subtags.region, subtags.variant, subtags.private, msg = get_ietf_parts (args.code);	-- |script=, |region=, |variant= not supported because they should be part of args.code ( in )  	if msg then 		return make_error_msg (msg, args, template); 	end  	local is_latn_text, pos, char; 	is_latn_text, args.text, pos, char= is_latin (args.text, code);		-- make a boolean  	msg = text_script_match_test (subtags.script, is_latn_text, pos, char) 	if msg then																	-- if an error detected then there is an error message 		return make_error_msg (msg, args, template); 	end  	args.italic, msg = validate_italic (args); 	if msg then 		return make_error_msg (msg, args, template); 	end  	if nil == args.italic then													-- nil when |italic= absent or not set or |italic=default; args.italic controls 		if ('latn' == subtags.script) or								 		-- script is latn 			(this_wiki_lang_tag ~= code and not is_set (subtags.script) and not has_poem_tag (args.text) and is_latn_text) then -- text not this wiki's language, no script specified and not in poem markup but is wholly latn script (auto-italics) 				args.italic = 'italic';											-- DEFAULT for  templates is upright; but if latn script set for font-style:italic 		else 			args.italic = 'inherit';											-- italic not set; script not latn; inherit current style 		end 	end 	 	if is_set (subtags.script) then												-- if script set, override rtl setting 		if in_array (subtags.script, lang_data.rtl_scripts) then 			args.rtl = true;													-- script is an rtl script 		else 			args.rtl = false;													-- script is not an rtl script 		end 	end  	args.code = format_ietf_tag (code, subtags.script, subtags.region, subtags.variant, subtags.private);	-- format to recommended subtag styles 	language_name = language_name_get (args.code, code, true);					-- get language name; try IETF tag first, then code w/o variant then code w/ variant  	if cfg.keywords_t.invert == args.italic and 'span' == tag then				-- invert only supported for in-line content 		args.text = invert_italics (args.text) 	end  	args.text = proto_prefix (args.text, language_name, args.proto);			-- prefix proto-language text with a splat  	table.insert (out, make_text_html (args.code, args.text, tag, args.rtl, args.italic, args.size, language_name)); 	table.insert (out, make_category (code, language_name, args.nocat)); 	table.insert (out, render_maint (args.nocat));								-- maintenance messages and categories  	return table.concat (out);													-- put it all together and done end  --[[--------------------------< L A N G >----------------------------------------------------------------------  Entry point for .  There should be no reason to set parameters in the   	  Parameters are received from the template's frame (parent frame).  ]]  local function lang (frame) 	local args_t = getArgs (frame, {											-- this code so that we can detect and handle wiki list markup in text 		valueFunc = function (key, value) 			if 2 == key or 'text' == key then									-- the 'text' parameter; do not trim wite space 				return value;													-- return untrimmed 'text' 			elseif value then													-- all other values: if the value is not nil 				value = mw.text.trim (value);									-- trim whitespace 				if  ~= value then												-- empty string when value was only whitespace 					return value; 				end 			end 			return nil;															-- value was empty or contained only whitespace 		end																		-- end of valueFunc 		});  	args_t.fn = nil;															-- unset because not supported but this function might have been called by   	local msg = parameter_validate (args_t, cfg.templates_t.lang);				-- verify that all supplied parameters are supported by  	if msg then 		return make_error_msg (msg, args_t, cfg.templates_t.lang);				-- when template has unsupported params, abandon with error message 	end  	return _lang (args_t); end  --[[--------------------------< T R A N S L A T I O N _ M A K E >----------------------------------------------  Stand-alone function to create literal translation of main text.  Also used by .  ]]  local function translation_make (args_t) 	local translation_t = {', '};												-- initialize output  	if 'none' ~= args_t.label then												-- if we want a label 		table.insert (translation_t, '<small>');								-- open the  HTML tag 		if cfg.keywords_t.negative == args_t.link then 			table.insert (translation_t, substitute ('$2', {cfg.translation_make_t.lit_xlation, cfg.translation_make_t.lit_abbr}));	-- unlinked form 		else 			table.insert (translation_t, make_wikilink (cfg.translation_make_t.lit_xlation, cfg.translation_make_t.lit_abbr));	-- linked form 		end 		table.insert (translation_t, " ");						-- close the <small> HTML tag 	end 	table.insert (translation_t, table.concat ({''', args_t.translation, '''}));	-- use HTML entities to avoid wiki markup confusion 	return table.concat (translation_t);										-- make a big string and done end  --[[--------------------------< _ L A N G _ X X >--------------------------------------------------------------  For the  templates, the only parameter required to be set in the template is the language code.  All other parameters can, usually should, be written in the template call.  For  templates for languages that can have multiple writing systems, it may be appropriate to set |script= as well.  For each  template choose the appropriate entry-point function so that this function knows the default styling that should be applied to text.  For normal, upright style: 	 For italic style: 	  All other parameters should be received from the template's frame (parent frame)  Supported parameters are: 	|code = (required) the IANA language code 	|script = IANA script code; especially for use with languages that use multiple writing systems 	|region = IANA region code 	|variant = IANA variant code 	|text = (required) the displayed text in language specified by code 	|link = boolean false ('no') does not link code-spcified language name to associated language article 	|rtl = boolean true ('yes') identifies the language specified by code as a right-to-left language 	|nocat = boolean true ('yes') inhibits normal categorization; error categories are not affected 	|cat = boolian false ('no') opposite form of |nocat= 	|italic = boolean true ('yes') renders displayed text in italic font; boolean false ('no') renders displayed text in normal font; not set renders according to initial_style_state 	|lit = text that is a literal translation of text 	|label = 'none' to suppress all labeling (language name, 'translit.', 'lit.') 				any other text replaces language-name label - automatic wikilinking disabled 	 	for those  templates that support transliteration (those templates where |text= is not entirely latn script): 	|translit = text that is a transliteration of text 	|translit-std = the standard that applies to the transliteration 	|translit-script = ISO 15924 script name; falls back to code  For , the positional parameters are: 		text 		transliterated text 		literal translation text no other positional parameters are allowed  ]]  local function _lang_xx (args, base_template)									-- base_template will be either of 'langx' or 'lang-xx' 	local out = {}; 	local language_name;														-- used to make display text, article links 	local category_name;														-- same as language_name except that it retains any parenthetical disambiguators (if any) from the data set 	local subtags = {};															-- IETF subtags script, region, and variant 	local code;																	-- the language code  	local translit_script_name;													-- name associated with IANA (ISO 15924) script code 	local translit; 	local msg;																	-- for error messages 	local tag = 'span';															-- initial value for make_text_html() 	local template = args.template or base_template;  	maint_cats = {};															-- initialize because when this module required into another module, these only declared once so only initialzed once 	maint_msgs = {}; 	 	local text_idx = (cfg.templates_t.langx == base_template) and 2 or 1;		-- for  'text' positional parameter is '2' 	local translit_idx = (cfg.templates_t.langx == base_template) and 3 or 2; 	local xlate_idx = (cfg.templates_t.langx == base_template) and 4 or 3;  	if args[text_idx] and args.text then 		return make_error_msg (substitute (cfg.lang_t.conflict_n_param, {translit_idx, cfg.lang_t.conflict_n_param_types.text}), args, template); 	else 		args.text = args[text_idx] or args.text;								-- prefer positional 'text' parameter 	end  	msg = validate_text (template, args);										-- ensure that |text= is set, does not contain italic markup and is protected from improper bolding 	if is_set (msg) then 		return msg; 	end  	args.text, tag = html_tag_select (args.text);								-- inspects text; returns appropriate HTML tag with text trimmed accordingly  	if args[translit_idx] and args.translit then 		return make_error_msg (substitute (cfg.lang_t.conflict_n_param, {translit_idx, cfg.lang_t.conflict_n_param_types.translit}), args, template);  	else 		args.translit = args[translit_idx] or args.translit						-- prefer positional 'translit' parameter 	end  	args.engvar = cfg.engvar_sel_t[args.engvar] or cfg.default_engvar;			-- |engvar= when valid; cfg.default_engvar else  	if args[xlate_idx] and (args.translation or args.lit) then 		return make_error_msg (substitute (cfg.lang_xx_t.conflict_n_lit, {translit_idx}), args, template); 	elseif args.translation and args.lit then 		return make_error_msg (cfg.lang_xx_t.conflict_lit, args, template); 	else 		args.translation = args[xlate_idx] or args.translation or args.lit;		-- prefer positional 'translation' parameter 	end  	if args.links and args.link then 		return make_error_msg (cfg.lang_xx_t.conflict_link, args, template); 	else 		args.link = args.link or args.links;									-- prefer args.link 	end  	validate_cat_args (args);													-- determine if categorization should be suppressed  	args.rtl = args.rtl == cfg.keywords_t.affirmative;							-- convert to boolean: 'yes' -> true, other values -> false  	code, subtags.script, subtags.region, subtags.variant, subtags.private, msg = get_ietf_parts (args.code, args.script, args.region, args.variant);	-- private omitted because private  	if msg then																	-- if an error detected then there is an error message 		return make_error_msg (msg, args, template); 	end 	 	if args.translit then 		local latn, pos, char; 		latn, args.translit, pos, char = is_latin (args.translit, (( ~= subtags.private) and (code .. '-x-' .. subtags.private)) or code); 		if not latn then 			return make_error_msg (substitute (cfg.lang_xx_t.translit_nonlatn, {pos, char}), args, template); 		end 	end  	local is_latn_text, text, pos, char = is_latin (args.text, code);			-- make a boolean 	args.text = text;															-- may have been modified (accept-as-written markup removed)  	msg = text_script_match_test (subtags.script, is_latn_text, pos, char) 	if msg then																	-- if an error detected then there is an error message 		return make_error_msg (msg, args, template); 	end  	args.italic, msg = validate_italic (args); 	if msg then 		return make_error_msg (msg, args, template); 	end 																				 	if cfg.templates_t.langx == base_template then								-- auto-italics  for  templates; adapted from  (no support for poem tag)  		if nil == args.italic then												-- nil when |italic= absent or not set or |italic=default; args.italic controls 			if ('latn' == subtags.script) or								 	-- script is latn 				(this_wiki_lang_tag ~= code and not is_set (subtags.script) and is_latn_text) then -- text is not this wiki's language, no script specified and is wholly latn script (auto-italics) 					args.italic = 'italic';										-- set font-style:italic 			else 				args.italic = 'inherit';										-- italic not set; script not latn; inherit current style 			end 		end 	 	else																		--  does not do auto italics; retained for those wikis that don't support  		if nil == args.italic then												-- args.italic controls 			if is_set (subtags.script) then 				if 'latn' == subtags.script then 					args.italic = 'italic';										-- |script=Latn; set for font-style:italic 				else 					args.italic = initial_style_state;							-- italic not set; script is not latn; set for font-style:<initial_style_state> 				end 			else 				args.italic = initial_style_state;								-- here when |italic= and |script= not set; set for font-style:<initial_style_state> 			end 		end 	end 	 	if is_set (subtags.script) then												-- if script set override rtl setting 		if in_array (subtags.script, lang_data.rtl_scripts) then 			args.rtl = true;													-- script is an rtl script 		else 			args.rtl = false;													-- script is not an rtl script 		end 	end  	args.proto, msg = validate_proto (args.proto);								-- return boolean, or nil, or nil and error message flag 	if msg then 		return make_error_msg (substitute (cfg.lang_t.invalid_proto, {args.proto}), args, template); 	end  	args.code = format_ietf_tag (code, subtags.script, subtags.region, subtags.variant, subtags.private);	-- format to recommended subtag styles 	language_name = language_name_get (args.code, code, true);					-- get language name; try IETF tag first, then code w/o variant then code w/ variant  	category_name = language_name;												-- category names retain IANA parenthetical diambiguators (if any) 	language_name = language_name:gsub ('%s+%b()', );							-- remove IANA parenthetical disambiguators or qualifiers from names that have them  	if args.label then 		if 'none' ~= args.label then 			table.insert (out, table.concat ({args.label, ': '}));				-- custom label 		end 	else 		if cfg.keywords_t.negative == args.link then 			table.insert (out, language_name);									-- language name without wikilink 		else 			if mw.ustring.find (language_name, 'languages', 1, true) then 				table.insert (out, make_wikilink (language_name));				-- collective language name uses simple wikilink 			elseif lang_data.article_name[args.code:lower()] then				-- is IETF tag in article name over ride? 				table.insert (out, make_wikilink (lang_data.article_name[args.code:lower()], language_name));	-- language name with wikilink from override data 			elseif lang_data.article_name[code] then							-- is language tag in article override 				table.insert (out, make_wikilink (lang_data.article_name[code], language_name));	-- language name with wikilink from override data 			else 				table.insert (out, make_wikilink (substitute ('$1 $2', {language_name, cfg.misc_text_t.language}), language_name));	-- language name with wikilink 			end 		end 		table.insert (out, ': ');												-- separator 	end  	if cfg.keywords_t.invert == args.italic then 		args.text = invert_italics (args.text) 	end 	 	args.text = proto_prefix (args.text, language_name, args.proto);			-- prefix proto-language text with a splat  	table.insert (out, make_text_html (args.code, args.text, tag, args.rtl, args.italic, args.size, ('none' == args.label) and language_name or nil))  	if is_set (args.translit) and not is_latn_text then							-- transliteration; not supported when args.text is wholly latn text (this is an imperfect test) 		table.insert (out, ', ');												-- comma to separate text from translit 		if 'none' ~= args.label then 			table.insert (out, ''); 			if script_table[args['translit-script']] then						-- when |translit-script= is set, try to use the script's name 				translit_script_name = script_table[args['translit-script']]; 			else 				translit_script_name = language_name;							-- fall back on language name 			end  			local translit_title_obj = mw.title.makeTitle (0, substitute ('$1 $2',{cfg.lang_xx_t.romanization, translit_script_name}));		-- make a title object; no engvar, article titles use US spelling 			if translit_title_obj.exists and (cfg.keywords_t.negative ~= args.link) then 				table.insert (out, make_wikilink (substitute ('$1 $2', {cfg.lang_xx_t.romanization, translit_script_name or language_name}), 					substitute ('$1', {cfg.engvar_t[args.engvar]['romanisz_pt']})) .. ':');	-- make a wikilink if there is an article to link to; engvar the display text  			else 				table.insert (out, substitute ('$1:', {cfg.engvar_t[args.engvar]['romanisz_pt']}));	-- else plain text per engvar  			end 			table.insert (out, ' ');								-- close the small tag 		end 		 		translit = make_translit (args.code, language_name, args.translit, args['translit-std'], args['translit-script'], nil, args.engvar) 		if is_set (translit) then 			table.insert (out, translit); 		else 			return make_error_msg (substitute ('$1: $2', {cfg.lang_xx_t.invalid_xlit_std, args['translit-std'] or '[missing]'}), args, template); 		end 	 	elseif is_set (args.translit) and is_latn_text then							-- when creating a transliteration of Latn script <text> 		return make_error_msg (cfg.lang_xx_t.xlit_of_latn, args, template);		-- emit error message and abandon 	end  	if is_set (args.translation) then											-- translation (not supported in ) 		table.insert (out, translation_make (args)); 	end 	 	table.insert (out, make_category (code, category_name, args.nocat)); 	table.insert (out, render_maint(args.nocat));								-- maintenance messages and categories  	return table.concat (out);													-- put it all together and done end  --[[--------------------------< L A N G _ X X _ A R G S _ G E T >----------------------------------------------  Common function to get args table from  templates.  Returns table of args.  Text positional parameters are not trimmed here but are selectively trimmed at html_tag_select().  ]]  local function lang_xx_args_get (frame, base_template) 	local args_t = getArgs(frame, 		{ 		parentFirst= true,														-- parameters in the template override parameters set in the  		valueFunc = function (key, value) 			if ((cfg.templates_t.langx == base_template) and 2 or 1) == key then	-- the 'text' positional parameter; 1 for , 2 for ; do not trim wite space 				return value;													-- return untrimmed 'text' positional parameter 			elseif value then													-- all other values: if the value is not nil 				value = mw.text.trim (value);									-- trim whitespace 				if  ~= value then												-- empty string when value was only whitespace 					return value; 				end 			end 			return nil;															-- value was empty or contained only whitespace 		end																		-- end of valueFunc 	});  	return args_t; end  --[[--------------------------< L A N G _ X X _ I T A L I C >--------------------------------------------------  Entry point for those  templates that call lang_xx_italic(). Sets the initial style state to italic.  ]]  local function lang_xx_italic (frame) 	local args = lang_xx_args_get (frame, cfg.templates_t.langxx); 	args.fn = nil;																-- unset because not supported but this function might have been called by  	 	local msg = parameter_validate (args, cfg.templates_t.langxx);				-- verify that all supplied parameters are supported by  	if msg then 		return make_error_msg (msg, args, cfg.templates_t.langxx);				-- when template has unsupported params, abandon with error message 	end  	initial_style_state = 'italic'; 	return _lang_xx (args, cfg.templates_t.langxx) .. 'Category:Pages using Lang-xx templates';	-- temporary category end  --[[--------------------------< _ L A N G _ X X _ I T A L I C >------------------------------------------------  Entry point from another module. Sets the initial style state to italic.  ]]  local function _lang_xx_italic (args) 	initial_style_state = 'italic'; 	return _lang_xx (args, cfg.templates_t.langxx); end  --[[--------------------------< L A N G _ X X _ I N H E R I T >------------------------------------------------  Entry point for those  templates that call lang_xx_inherit(). Sets the initial style state to inherit.  ]]  local function lang_xx_inherit (frame) 	local args = lang_xx_args_get (frame, cfg.templates_t.langxx); 	args.fn = nil;																-- unset because not supported but this function might have been called by   	local msg = parameter_validate (args, cfg.templates_t.langxx);				-- verify that all supplied parameters are supported by  	if msg then 		return make_error_msg (msg, args, cfg.templates_t.langxx);				-- when template has unsupported params, abandon with error message 	end  	initial_style_state = 'inherit'; 	return _lang_xx (args, cfg.templates_t.langxx) .. 'Category:Pages using Lang-xx templates';	-- temporary category end  --[[--------------------------< _ L A N G _ X X _ I N H E R I T >----------------------------------------------  Entry point from another module. Sets the initial style state to inherit.  ]]  local function _lang_xx_inherit (args) 	initial_style_state = 'inherit'; 	return _lang_xx (args, cfg.templates_t.langxx); end  --[[--------------------------< _ L A N G X >------------------------------------------------------------------  Entry point from another module.  ]]  local function _langx (args_t) 	local langx_data = mw.loadData ('Module:Lang/langx/খেলাঘর');						-- get necessary data  	local rtl_t = langx_data.rtl_t;												-- get list of language tags for languages that are rendered right-to-left 	local link_t = langx_data.link_t;											-- get list of language tags for  templates that set |link=<something> 	local size_t = langx_data.size_t;											-- get list of language tags for  templates that set |size=<something>  	local msg = parameter_validate (args_t, cfg.templates_t.langx); 	if msg then 		return make_error_msg (msg, args_t, cfg.templates_t.langx); 	end  	args_t.code = args_t[1] or args_t.code;										-- get the language tag; must be  or |code= 	if not args_t.code then 		return make_error_msg (cfg.get_ietf_parts_t.missing_lang_tag, args_t, cfg.templates_t.langx); 	end 	 	args_t.rtl = args_t.rtl or (rtl_t[args_t.code] and cfg.keywords_t.affirmative);	-- prefer |rtl= in template call, use rtl_t else 	args_t.link = args_t.link or link_t[args_t.code];							-- prefer |link= in template call, use link_t felse 	args_t.size = args_t.size or size_t[args_t.code];							-- prefer |size= in template call, use size_t else 	 	args_t[1] = nil;															-- unset to mimic  templates which set |code=xx  	local lang_subtag = args_t.code;											-- use only the base language subtag for unsupported tag test; some args_t.code are modified by |script= etc 	return _lang_xx (args_t, cfg.templates_t.langx); end  --[[--------------------------< L A N G X >--------------------------------------------------------------------  Entry point for .  this function calls _lang_xx() to render non-English text. The  templates have three positional paramters but  has four:  				|  1	|  2		|  3		|  4	 	 	  The calls to lang_xx_args_get() and _lang_xx() use 'langx' as a flag for those functions to select the proper positional parameters.   depends on the calling template to select 'inherit' or 'italic' to establish the default rendering.   can't do that.  The initial version of  relied on a list of language tags (inherit_t in ~/langx) scraped from those  templates that call lang_xx_inherit() to render text in upright font. langx() now uses auto-italics code adapted from  (doesn't support poem tags).  ]]  local function langx (frame) 	local args_t = lang_xx_args_get (frame, cfg.templates_t.langx);				-- get the arguments; 'langx' is the <base_template> used to decide which positional param is 'text', 'translit', 'lit' 	 	return _langx (args_t); end  --[[--------------------------< _ I S _ I E T F _ T A G >------------------------------------------------------  Returns true when a language name associated with IETF language tag exists; nil else.  IETF language tag must be valid.  All code combinations supported by  and the  templates are supported by this function.  Module entry point from another module.  ]]  local function _is_ietf_tag (tag)												-- entry point when this module is require()d into another 	local c, s, r, v, p, err;													-- code, script, region, variant, private, error message 	c, s, r, v, p, err = get_ietf_parts (tag);									-- disassemble tag into constituent part and validate  	return ((c and not err) and true) or nil;									-- return true when code portion has a value without error message; nil else end  --[[--------------------------< I S _ I E T F _ T A G >--------------------------------------------------------  Module entry point from an .  ]]  local function is_ietf_tag (frame) 	return _is_ietf_tag (getArgs (frame)[1]);									-- args[1] is the IETF language tag to be tested; also get parent frame end  --[[--------------------------< I S _ I E T F _ T A G _ F R A M E >--------------------------------------------  Module entry point from an ; same as is_ietf_tag() except does not get parameters from the parent (template) frame.  This function not useful when called by  because <tag> is in the parent frame.  ]]  local function is_ietf_tag_frame (frame) 	return _is_ietf_tag (getArgs (frame, {frameOnly = true,})[1]);				-- args[1] is the IETF language tag to be tested; do not get parent frame end  --[[--------------------------< _ N A M E _ F R O M _ T A G >--------------------------------------------------  Returns language name associated with IETF language tag if valid; error message else.  All code combinations supported by  and the  templates are supported by this function.  Set invoke's |link= parameter to yes to get wikilinked version of the language name.  Module entry point from another module.  ]]  local function _name_from_tag (args) 	local subtags = {};															-- IETF subtags script, region, variant, and private 	local raw_code = args[1];													-- save a copy of the input IETF subtag 	local link = cfg.keywords_t.affirmative == args['link'];					-- make a boolean 	local label = args.label; 	local code;																	-- the language code 	local msg;																	-- gets an error message if IETF language tag is malformed or invalid 	local language_name = ; 	 	code, subtags.script, subtags.region, subtags.variant, subtags.private, msg = get_ietf_parts (raw_code); 	if msg then 		local template = (args['template'] and table.concat ({'{{', args['template'], '}}: '})) or ;	-- make template name (if provided by the template) 		return make_error_span (template, msg); 	end  	raw_code = format_ietf_tag (code, subtags.script, subtags.region, subtags.variant, subtags.private);	-- format to recommended subtag styles; private omitted because private 	language_name = language_name_get (raw_code, code);							-- get language name; try IETF tag first, then code w/o variant then code w/ variant  	if 'yes' ~= args.raw then 		language_name = language_name:gsub ('%s+%b()', );						-- remove IANA parenthetical disambiguators or qualifiers from names that have them 	end  	if link then																-- when |link=yes, wikilink the language name 		if mw.ustring.find (language_name, 'languages', 1, true) then 			language_name = make_wikilink (language_name, label);				-- collective language name uses simple wikilink 		elseif lang_data.article_name[raw_code:lower()] then					-- is IETF tag in article name override? 			language_name = make_wikilink (lang_data.article_name[raw_code:lower()], label or language_name);	-- language name with wikilink from override data 		elseif lang_data.article_name[code] then								-- is language tag in article name override? 			language_name = make_wikilink (lang_data.article_name[code], label or language_name);	-- language name with wikilink from override data 		else 			language_name = make_wikilink (substitute ('$1 $2', {language_name, cfg.misc_text_t.language}), label or language_name);	-- language name with wikilink 		end 	end  	return language_name; end  --[[--------------------------< N A M E _ F R O M _ T A G >----------------------------------------------------  Module entry point from an .  ]]  local function name_from_tag (frame)											-- entry point from an  	return _name_from_tag (getArgs(frame))										-- pass-on the args table, nothing else; getArgs() so we also get parent frame end  --[[--------------------------< _ T A G _ F R O M _ N A M E >--------------------------------------------------  Returns the IETF language tag associated with the language name.  Spelling of language name must be correct according to the spelling in the source tables.  When a standard language name has a parenthetical disambiguator, that disambiguator must be omitted (they are not present in the data name-to-tag tables).  Module entry point from another module.  ]]  local function _tag_from_name (args)											-- entry point from another module 	local msg;  	if args[1] and  ~= args[1] then 		local data = mw.loadData ('Module:Lang/tag from name');					-- get the reversed data tables TODO: change when going live 		local lang = args[1]:lower();											-- allow any-case for the language name (speeling must till be correct) 		local tag = data.rev_override_table[lang] or data.rev_lang_table[lang] or data.rev_lang_dep_table[lang];	-- get the code; look first in the override then in the standard  		if tag then 			return tag, true;													-- language name found so return tag and done; second return used by is_lang_name() 		else 			msg = substitute (cfg.tag_from_name_t.lang_not_found, {args[1]});	-- language name not found, error message 		end 	else 		msg = cfg.tag_from_name_t.missing_lang_name;							-- language name not found, error message 	end  	local template = ; 	if args.template and  ~= args.template then 		template = table.concat ({'{{', args['template'], '}}: '});				-- make template name (if provided by the template) 	end 	return make_error_span (template, msg);  end  --[[--------------------------< T A G _ F R O M _ N A M E >----------------------------------------------------  Module entry point from an .  ]]  local function tag_from_name (frame)											-- entry point from an  	local result, _ = _tag_from_name (getArgs(frame))							-- pass-on the args table, nothing else; getArgs() so we also get parent frame; supress second return used by is_lang_name() 	return result;		 end  --[[--------------------------< I S _ L A N G _ N A M E >------------------------------------------------------  Module entry point from an .  ]]  local function is_lang_name (frame) 	local _, result = _tag_from_name (getArgs(frame))							-- pass-on the args table, nothing else; getArgs() so we also get parent frame; supress second return used by tag_from_name() 	return result and true or nil;		 end  --[[--------------------------< _ X L I T >--------------------------------------------------------------------  Module entry point from another module.  ]]  local function _xlit (args) 	local title_table = lang_data.translit_title_table;							-- table of transliteration standards and the language codes and scripts that apply to those standards 	local language_name;														-- language name that matches language code; used for tool tip 	local translit;																-- transliterated text to display 	local script;																-- IANA script 	local msg;																	-- for when called functions return an error message 	local template = args.template or cfg.templates_t.transliteration;  	maint_cats = {};															-- initialize because when this module required into another module, these only declared once so only initialzed once 	maint_msgs = {}; 	 	if is_set (args[3]) then													-- [3] set when  		args.text = args[3];													-- get the transliterated text 		args.translit_std = args[2] and args[2]:lower();						-- get the standard; lower case for table indexing  		if not title_table[args.translit_std] then 			return make_error_msg (substitute (cfg.transl_t.unrecog_xlit_std, {args.translit_std}), args, template); 		end 	else 		if is_set (args[2]) then												-- [2] set when  			args.text = args[2];												-- get the transliterated text 		else 			if args[1] and (args[1]:match ('^%a%a%a?%a?$') or					-- args[2] missing; is args[1] a language or script tag or is it the transliterated text? 				args[1]:match ('^%a%a%a?%-x%-')) then							-- or is args[1] a private-use tag 					return make_error_msg (cfg.transl_t.no_text, args, template);	-- args[1] is a code so we're missing text 			else 				args.text = args[1];											-- args[1] is not a code so we're missing that; assign args.text for error message 				return make_error_msg (cfg.transl_t.missing_lang_scr, args, template); 			end 		end 	end  	if is_set (args[1]) then													-- IANA language code used for HTML lang= attribute; or ISO 15924 script code 		if args[1]:match ('^%a%a%a?%a?$') or args[1]:match ('^%a%a%a?%-x%-') then	-- args[1] has correct form? 			args.code = args[1]:lower();										-- use the language/script code; only (2, 3, or 4 alpha characters) or private-use; lower case because table indexes are lower case 		else 			return make_error_msg (substitute (cfg.transl_t.unrecog_lang_scr, {args[1]}), args, template);	-- invalid language / script code 		end 	else 		return make_error_msg (cfg.transl_t.missing_lang_scr, args, template);	-- missing language / script code so quit 	end  	local is_latn_text, pos, char; 	is_latn_text, args.text, pos, char= is_latin (args.text, args.code);		-- is latn text? strip accept-as-written markup 	if not is_latn_text then													-- when text is not latn 		return make_error_msg (substitute (cfg.lang_xx_t.translit_nonlatn, {pos, char}), args, template);	-- abandon with error message 	end  	args.italic, msg = validate_italic (args); 	if msg then 		return make_error_msg (msg, args, template); 	end 	 	if 'italic' == args.italic then												-- 'italic' when |italic=yes; because that is same as absent or not set and |italic=default 		args.italic = nil;														-- set to nil;  	end  	args.engvar = cfg.engvar_sel_t[args.engvar] or cfg.default_engvar;			-- |engvar= when valid; cfg.default_engvar else  	if override_table[args.code] then											-- is code a language code defined in the override table? 		language_name = override_table[args.code]; 		args.code = args.code:match ('^%a%a%a?');								-- if private use, strip all but language subtag 	elseif lang_table[args.code] then											-- is code a language code defined in the standard language code tables? 		language_name = lang_table[args.code]; 	elseif lang_dep_table[args.code] then										-- is code a language code defined in the deprecated language code tables? 		language_name = lang_dep_table[args.code]; 	elseif script_table[args.code] then											-- if here, code is not a language code; is it a script code? 		language_name = script_table[args.code]; 		script = args.code;														-- code was an ISO 15924 script so use that instead 		args.code = ;															-- unset because not a language code 	else 		return make_error_msg (substitute (cfg.transl_t.unrecog_lang_scr, {args.code}), args, template);	-- invalid language / script code 	end 																				-- here only when all parameters passed to make_translit() are valid 	return make_translit (args.code, language_name, args.text, args.translit_std, script, args.italic, args.engvar); end  --[[--------------------------< X L I T >----------------------------------------------------------------------  Module entry point from an .  ]]  local function xlit (frame) 	return _xlit (getArgs(frame)); end  --[[--------------------------< C A T E G O R Y _ F R O M _ T A G >--------------------------------------------  Returns category name associated with IETF language tag if valid; error message else.  All code combinations supported by  and the  templates are supported by this function.  Module entry point from another module.  ]]  local function _category_from_tag (args_t) 	local subtags = {};															-- IETF subtags script, region, variant, and private 	local raw_code = args_t[1];													-- save a copy of the input IETF subtag 	local link = cfg.keywords_t.affirmative == args_t.link;						-- make a boolean 	local label = args_t.label; 	local code;																	-- the language code 	local msg;																	-- gets an error message if IETF language tag is malformed or invalid 	local category_name = ; 	 	code, subtags.script, subtags.region, subtags.variant, subtags.private, msg = get_ietf_parts (raw_code); 	if msg then 		local template = (args_t.template and table.concat ({': '})) or ;	-- make template name (if provided by the template) 		return make_error_span (template, msg); 	end  	raw_code = format_ietf_tag (code, subtags.script, subtags.region, subtags.variant, subtags.private);	-- format to recommended subtag styles; private omitted because private 	category_name = language_name_get (raw_code, code);							-- get language name; try IETF tag first, then code w/o variant then code w/ variant 	category_name = make_category (code, category_name, nil, true):gsub ('[%[%]]', );  	if link then 		return table.concat ({':', category_name, ''}); 	else 		return category_name; 	end end  --[[--------------------------< C A T E G O R Y _ F R O M _ T A G >--------------------------------------------  Module entry point from an .  ]]  local function category_from_tag (frame)										-- entry point from an  	return _category_from_tag (getArgs (frame));								-- pass-on the args table, nothing else; getArgs() so we also get parent frame end  --[[--------------------------< E X P O R T E D   F U N C T I O N S >------------------------------------------ ]]  return { 	category_from_tag = category_from_tag,										-- frame entry points when this module is #invoke:ed into templates/wikitext 	lang = lang,																-- entry point for  	langx = langx,																-- entry point for  	lang_xx_inherit = lang_xx_inherit,											-- entry points for  	lang_xx_italic = lang_xx_italic, 	is_ietf_tag = is_ietf_tag, 	is_ietf_tag_frame = is_ietf_tag_frame, 	is_lang_name = is_lang_name, 	tag_from_name = tag_from_name,												-- returns IETF tag associated with language name 	name_from_tag = name_from_tag,												-- used for template documentation; possible use in ISO 639 name from code templates 	xlit = xlit,																-- entry point for  	 	_category_from_tag = _category_from_tag,									-- API entry points when this module is require()d into other modules 	_lang = _lang, 	_langx = _langx, 	_lang_xx_inherit = _lang_xx_inherit, 	_lang_xx_italic = _lang_xx_italic, 	_is_ietf_tag = _is_ietf_tag, 	get_ietf_parts = get_ietf_parts, 	_tag_from_name = _tag_from_name,  	_name_from_tag = _name_from_tag, 	_xlit = _xlit, 	_translation_make = translation_make, 	};