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--[=[Lua support for the {{lang}}, {{langx}}, {{lang-??}}, and {{transliteration}} templates and replacement of various supporting templates. ]=]require('strict');local getArgs = require ('Module:Arguments').getArgs;local unicode = require ("Module:Unicode data");								-- for is_Latin() and is_rtl()local yesno = require ('Module:Yesno');local lang_data =  mw.loadData ('Module:Lang/data');							-- language name override and transliteration tool-tip tableslocal lang_name_table = lang_data.lang_name_table;								-- language codes, names, regions, scripts, suppressed scriptslocal 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');				-- ISO 639-2/639-2T code translation to 639-1 codelocal cfg = mw.loadData ('Module:Lang/configuration' .. (mw.getCurrentFrame():getTitle():match ('/sandbox') or ''));	-- for internationalizationlocal is_latn_data = mw.loadData ('Module:Lang/data/is latn data');local sizeof_ranges_t = is_latn_data.sizeof_ranges_t;local namespace = mw.title.getCurrentTitle().namespace;							-- used for categorizationlocal content_lang = mw.language.getContentLanguage();local this_wiki_lang_tag = content_lang.code;									-- get this wiki's language taglocal this_wiki_lang_dir = content_lang:getDir();								-- get this wiki's language directionlocal initial_style_state;														-- set by lang_xx_normal() and lang_xx_italic()local maint_cats = {};															-- maintenance categories go herelocal 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 ({'<span style="color:#d33">', cfg.misc_text_t.error, ': ', template, msg, '</span>'})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 {{langx}}	if cfg.templates_t.langxx == template then		text = args_t.text or args_t[1];										-- for {{lang-xx}}	else		text = args_t.text or args_t[2];										-- for {{lang}}, {{langx}}, and {{transliteration}}	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 ('[[Thể loại:$1]]', {category}) or '';	return substitute ('[$1] <span style="color:#d33">$2: {{$3}}: $4 ([[:Thể loại:$5|$6]])</span>$7',		{		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 {{lang}}		for param, _ in pairs (args_t) do			if not cfg.known_params_t.params_lang_t[param] and					-- unique {{lang}} 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 {{langx}}		for param, _ in pairs (args_t) do			if not cfg.known_params_t.params_langx_t[param] and					-- unique {{langx}} parameters				not cfg.known_params_t.params_x_t[param] and					-- common to {{langx}} and {{lang-xx}}				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 {{lang-xx}}		for param, _ in pairs (args_t) do			if not cfg.known_params_t.params_lang_xx_t[param] and				-- unique {{lang-xx}} parameters				not cfg.known_params_t.params_x_t[param] and					-- common to {{langx}} and {{lang-xx}}				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 notan 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 markupin args.text.  Like |italic=unset, |italic=invert disables automatic italic markup.  Individual leading/trailingapostrophes are converted to their html numeric entity equivalent so that the new italic markup doesn't becomebold 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[^\']", '&#39;');							-- 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 doneend--[[--------------------------< 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 acceptible 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 unacceptible 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 transl function to set args.italic according to the template'sdefined default ('inherit' for {{lang}}, 'inherit' or 'italic' for {{lang-??}} depending onthe individual template's requirements, 'italic' for {{transliteration}}) or to the value appropriate to |script=, if set ({{lang}}and {{lang-??}} 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 messageend--[=[--------------------------< V A L I D A T E _ C A T _ A R G S >----------------------------------------------------------Default behavior of the {{lang}} and {{lang-??}} templates is to add categorization when the templates are used in mainspace.This default functionality may be suppressed by setting |nocat=yes or |cat=no.  This function selects one of these two parametersto control categorization.Because having two parameters with 'opposite' names and 'opposite' values is confusing, this function accepts only affirmativevalues for |nocat= and only negative values for |cat=; in both cases the 'other' sense (and non-sense) is not accepted and theparameter 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 elsefor |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;	endend--[[--------------------------< 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 tagin 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 becausethe IANA registry file omits the synonymous three-character code; we cannot depend on browsers understandingthe synonymous three-character codes in the lang= attribute.For {{lang-??}} templates, the parameters |script=, |region=, and |variant= are supported (not supported in {{lang}}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, invalidparts 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 acceptibe 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 nilend--[=[-------------------------< 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 [[L|D]]; if onlylink is provided, returns a wikilink in the form [[L]]; if neither are provided or link is omitted, returns anempty string.]=]local function make_wikilink (link, display)	if is_set (link) then		if is_set (display) then			return table.concat ({'[[', link, '|', display, ']]'});		else			return table.concat ({'[[', link, ']]'});		end	else		return '';	endend--[[--------------------------< D I V _ M A R K U P _ A D D >--------------------------------------------------Adds <i> and </i> tags to list-item text or to implied <p>..</p> 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<i>%2</i>');			-- 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]+', '<p><i>%1</i></p>');						-- insert p and italic markup tags at each impled p (two or more consecutive '\n\n' sequences)		else			text = text:gsub ('[^\n]+', '<p>%1</p>');							-- insert p markup at each impled 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 <span title="<title text>"><content_text></span> or <div title="<title text>"><content_text></div> where<title text> is in the tool-tip in the wiki's local language and <content_text> is non-local-language text inhtml markup.  This because the lang= attibute 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 doneend--[[--------------------------< 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 contentThe lang= attribute also applies to the content of the tag where it is placed so this is wrong because 'Spanishlanguage text' is English:	<i lang="es" title="Spanish language text">casa</i>should be:	<span title="Spanish language text"><i lang="es">casa</i></span>or for <div>...</div>:	<div title="Spanish language text"><div lang="es"><spanish-language-text></div></div>]]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, '&#42;');											-- 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', {cfg.make_text_html_t.zxx, language});	-- not a language so don't use 'language' in title text			elseif mw.ustring.find (language, 'ngữ', 1, true) then				title_text = substitute ('$1 $2', {cfg.make_text_html_t.collective, language});	-- for collective languages			else				title_text = substitute ('$1 $2', {cfg.make_text_html_t.individual, language});	-- for individual languages			end		return title_wrapper_make (title_text, table.concat (html_t), wrapper_tag);	else		return table.concat (html_t);	endend--[=[-------------------------< M A K E _ C A T E G O R Y >----------------------------------------------------For individual language, <language>, returns:	[[Thể loại:Bài viết có văn bản <language>]]For Vietnamese:	[[Thể loại:Bài viết có văn bản tiếng Việt nêu rõ]]	For ISO 639-2 collective languages (and for 639-1 bh):	[[Thể loại:Bài viết có văn bản <language>]]]=]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, 'ngữ', 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.cat_postfix,			language_name,			cfg.make_category_t.explicit_cat,			});	else		return substitute ('[[$1 $2 $3]]', {									-- category for individual languages			cfg.make_category_t.cat_prefix,			cfg.make_category_t.cat_postfix,			language_name,			});	endend--[[--------------------------< M A K E _ T R A N S L I T >----------------------------------------------------Return translit <i lang=xx-Latn>...</i> where xx is the language code; else return empty string.The value |script= is not used in {{transliteration}} for this purpose; instead it uses |code.  Because language scriptsare listed in the {{transliteration}} switches they are included in the data tables.  The script parameter is introducedat {{Language with name and transliteration}}.  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 renamedto be |translit-script= (in this function, tscript).This function is used by both lang_xx() and transl()	lang_xx() always provides code, language_name, and translit; may provide tscript; never provides style	transl() always provides language_name, translit, and one of code or tscript, never both; always provides styleFor {{transliteration}}, 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, 'ngữ', 1, true) then		-- collective language names (plural 'languages' is part of the name)			title_text = substitute ('$1 $2', {cfg.misc_text_t.language, title_text});	-- skip this text (individual and macro languages only)		end		title_text = substitute ('$1 $2', {cfg.engvar_t[engvar]['romanisz_lc'], title_text});	-- 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						cfg.make_translit_t.transliteration,						title_text,						title_t[std][tscript:lower()],						cfg.make_translit_t.script,						script_table[tscript],						});				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 (transl may not provide a language code)			title_text = substitute ('$1$2 $3 ($4 $5)', {						-- add the appropriate text to the tool tip				cfg.make_translit_t.transliteration,				title_text,				title_t[std][code:lower()],				cfg.misc_text_t.language,				language_name,				});		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					cfg.make_translit_t.transliteration,					cfg.make_translit_t.script,					title_text,					language_name,					});			elseif is_set (code) then				if not mw.ustring.find (language_name, 'ngữ', 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)						cfg.misc_text_t.language,						title_text,						});				end					title_text = substitute ('$1 $2', {							-- finish the tool tip						cfg.make_translit_t.transliteration,						title_text,						});			else					title_text = substitute ('$1 $2', {							-- generic tool tip (can we ever get here?)						cfg.make_translit_t.transliteration,						title_text,						});			end		end	end	local tag	if is_set (code) then														-- when a language code is provided (always with {{lang-??}} templates, not always with {{transliteration}})		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 = '<i lang="%s-Latn">%s</i>'		else			tag = '<span style="font-style: %s" lang="%s-Latn">%s</span>'		-- 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 = '<span>%s</span>'													-- when no language code: no lang= attribute, not italic ({{transliteration}} 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	endend--[[--------------------------< 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 anerror 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.texteither 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	endend--[[--------------------------< 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 <span> tag		for _, msg in ipairs (maint_msgs) do			table.insert (maint, table.concat ({msg, ' '}));					-- add message strings		end		table.insert (maint, '</span>');										-- 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 ({'[[Thể loại:', 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 splatwill be rendered outside of italic markup (if used). If the first character in text here is already a splat, wedo nothing.proto_param is boolean or nil; true adds splat prefix regardless of language name; false removes and inhibitsregardless 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 language_name:find (' nguyên th[uủ][yỷ]$') 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 splatend--[[--------------------------< 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 knowthe 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 <p>..</p> tags - trim leading and trailing whitespace and return If text begins with list markup:	\n*		unordered	\n;		definition	\n:		definition	\n#		orderedtrim all leading whitespace except  \n and trim all trailing whitespaceIf text contains <poem>...</poem> stripmarker, return text unmodified and choose <div>..</div> tags because the stripmarker is replaced with text wrapped in <div>..</div> tags.If the text contains any actual <div>...</div> tags, then it's again returned unmodified and <div>...</div>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 secondreturn 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	endend--[[--------------------------< 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 nilend--[[--------------------------< 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 andwhat they look like.  It does know what Latn script looks like so when <text> is written using other than the Latnscript, 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 becauseunicode 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	endend--[[--------------------------< 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	endend--[[--------------------------< I S _ L A T I N >--------------------------------------------------------------compare <text> as codepoints to lists of known codepoints accepted as Latn scriptreturns boolean true and modified <text> when <text> is wrapped in accept-as-written markupreturns boolean true and <text> when codepoint is knownreturns boolean false, <text>, non-Latn codepoint position in <text> (left to right), and the codepoint character	when codepoint is not knownTODO: 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 {{lang}}.There should be no reason to set parameters in the {{lang}} {{#invoke:}}	<includeonly>{{#invoke:lang|lang}}</includeonly>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 ({{{1}}} in {{lang}})	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 {{lang}} 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 doneend--[[--------------------------< L A N G >----------------------------------------------------------------------Entry point for {{lang}}.There should be no reason to set parameters in the {{lang}} {{#invoke:}}	<includeonly>{{#invoke:lang|lang}}</includeonly>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 {{lang|fn=lang|...}}	local msg = parameter_validate (args_t, cfg.templates_t.lang);				-- verify that all supplied parameters are supported by {{lang-??}}	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 {{lang-x2}}.]]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 <small> html tag		if cfg.keywords_t.negative == args_t.link then			table.insert (translation_t, substitute ('<abbr title="$1">$2</abbr>', {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, "&thinsp;</small>");						-- close the <small> html tag	end	table.insert (translation_t, table.concat ({'&#39;', args_t.translation, '&#39;'}));	-- use html entities to avoid wiki markup confusion	return table.concat (translation_t);										-- make a big string and doneend--[[--------------------------< _ L A N G _ X X >--------------------------------------------------------------For the {{lang-??}} templates, the only parameter required to be set in the template is the language code.  Allother parameters can, usually should, be written in the template call.  For {{lang-??}} templates for languagesthat can have multiple writing systems, it may be appropriate to set |script= as well.For each {{lang-??}} template choose the appropriate entry-point function so that this function knows the defaultstyling that should be applied to text.For normal, upright style:	<includeonly>{{#invoke:lang|lang_xx_inherit|code=xx}}</includeonly>For italic style:	<includeonly>{{#invoke:lang|lang_xx_italic|code=xx}}</includeonly>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 {{lang-??}} 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 codeFor {{lang-??}}, the positional parameters are:	{{{1}}}	text	{{{2}}}	transliterated text	{{{3}}}	literal translation textno 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 {{langx}} '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 {{langx}} templates; adapted from {{lang}} (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																		-- {{lang-xx}} does not do auto italics; retained for those wikis that don't support {{langx}}		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, substitute ('$1 $2', {cfg.misc_text_t.language, language_name}));									-- language name without wikilink		else			if mw.ustring.find (language_name, 'ngữ', 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', {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, '<small>');			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, '&nbsp;</small>');								-- 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 {{lang}})		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 doneend--[[--------------------------< L A N G _ X X _ A R G S _ G E T >----------------------------------------------Common function to get args table from {{lang-??}} 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 {{#invoke:}}		valueFunc = function (key, value)			if ((cfg.templates_t.langx == base_template) and 2 or 1) == key then	-- the 'text' positional parameter; 1 for {{lang-??}}, 2 for {{langx}}; 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 {{lang-??}} 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 {{lang|fn=lang_xx_italic|...}}		local msg = parameter_validate (args, cfg.templates_t.langxx);				-- verify that all supplied parameters are supported by {{lang-??}}	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) .. '[[Thể loại:Trang sử dụng bản mẫu Lang-xx]]';	-- temporary categoryend--[[--------------------------< _ 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 {{lang-??}} 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 {{lang|fn=lang_xx_inherit|...}}	local msg = parameter_validate (args, cfg.templates_t.langxx);				-- verify that all supplied parameters are supported by {{lang-??}}	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) .. '[[Thể loại:Trang sử dụng bản mẫu Lang-xx]]';	-- temporary categoryend--[[--------------------------< _ 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');						-- 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 {{lang-??}} templates that set |link=<something>	local size_t = langx_data.size_t;											-- get list of language tags for {{lang-??}} 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 {{{1}}} 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 {{lang-??}} 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 {{langx}}.this function calls _lang_xx() to render non-English text. The {{lang-??}} templates have three positional paramtersbut {{langx}} has four:				|  1	|  2		|  3		|  4		{{lang-xx	|<text>	|<transl>	|<xlate>			}}	{{langx		|<tag>	|<text>		|<transl>	|<xlate>	}}The calls to lang_xx_args_get() and _lang_xx() use 'Langx' as a flag for those functions to select the properpositional parameters.{{lang-??}} depends on the calling template to select 'inherit' or 'italic' to establish the default rendering.{{langx}} can't do that.  The initial version of {{langx}} relied on a list of language tags (inherit_t in ~/langx)scraped from those {{lang-??}} templates that call lang_xx_inherit() to render text in upright font. Langx nowuses auto-italics code adapted from {{lang}} (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 {{lang}} and the {{lang-??}} 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 elseend--[[--------------------------< I S _ I E T F _ T A G >--------------------------------------------------------Module entry point from an {{#invoke:}}.]]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 frameend--[[--------------------------< I S _ I E T F _ T A G _ F R A M E >--------------------------------------------Module entry point from an {{#invoke:}}; same as is_ietf_tag() except does not get parameters from the parent(template) frame.  This function not useful when called by {{lang|fn=is_ietf_tag_frame|<tag>}} 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 frameend--[[--------------------------< _ 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 {{lang}} and the {{lang-??}} 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, 'ngữ', 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', {cfg.misc_text_t.language, language_name}));	-- language name with wikilink		end	end	if link or mw.ustring.find (language_name, 'ngữ', 1, true) then	    return language_name;	end	return substitute ('$1 $2', {cfg.misc_text_t.language, language_name});end--[[--------------------------< N A M E _ F R O M _ T A G >----------------------------------------------------Module entry point from an {{#invoke:}}.]]local function name_from_tag (frame)											-- entry point from an {{#invoke:Lang|name_from_tag|<ietf tag>|link=<yes>|template=<template name>}}	return _name_from_tag (getArgs(frame))										-- pass-on the args table, nothing else; getArgs() so we also get parent frameend--[[--------------------------< _ 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 correctaccording 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 {{#invoke:}}.]]local function tag_from_name (frame)											-- entry point from an {{#invoke:Lang|tag_from_name|<language name>|link=<yes>|template=<template name>}}	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 {{#invoke:}}.]]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--[[--------------------------< _ T R A N S L >----------------------------------------------------------------Module entry point from another module.]]local function _transl (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 {{transliteration|code|standard|text}}		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 {{transliteration|code|text}}			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--[[--------------------------< T R A N S L >------------------------------------------------------------------Module entry point from an {{#invoke:}}.]]local function transl (frame)	return _transl (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 {{lang}} and the {{lang-??}} 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 ({'{{', args_t.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	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;	endend--[[--------------------------< C A T E G O R Y _ F R O M _ T A G >--------------------------------------------Module entry point from an {{#invoke:}}.]]local function category_from_tag (frame)										-- entry point from an {{#invoke:Lang|category_from_tag|<ietf tag>|template=<template name>}}	return _category_from_tag (getArgs (frame));								-- pass-on the args table, nothing else; getArgs() so we also get parent frameend--[[--------------------------< E X P O R T E D   F U N C T I O N S >------------------------------------------]]return {	category_from_tag = category_from_tag,	lang = lang,																-- entry point for {{lang}}	langx = langx,																-- entry point for {{langx}}	lang_xx_inherit = lang_xx_inherit,											-- entry points for {{lang-??}}	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	transl = transl,															-- entry point for {{transliteration}}		_category_from_tag = _category_from_tag,									-- 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,	_transl = _transl,	_translation_make = translation_make,	};
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