Module:grc-decl/decl

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This module contains functions that use the declension information in the submodules data and staticdata to determine the declension type, generate the inflected forms, and add the forms of the definite article.


local module_path = 'Module:grc-decl/decl'

local m_classes = mw.loadData(module_path .. '/classes')
local m_paradigms = mw.loadData(module_path .. '/staticdata/paradigms')
local m_dialect_groups = mw.loadData(module_path .. '/staticdata/dialects')
local m_decl_data = require(module_path .. '/data')
local m_accent = require('Module:grc-accent')

local usub = mw.ustring.sub
local decompose = mw.ustring.toNFD
local compose = mw.ustring.toNFC

-- Equivalent to mw.ustring.len.
local function ulen(str)
	local _, length = string.gsub(str, '[\1-\127\194-\244][\128-\191]*', '')
	return length
end

-- Basic string functions can be used when there are no character sets or
-- quantifiers.
local ufind = mw.ustring.find
local ugsub = mw.ustring.gsub

local export = {
	inflections = m_decl_data.inflections,
	adjinflections = m_decl_data.adjinflections,
	adjinflections_con = m_decl_data.adjinflections_con,
}

local function quote(text)
	return "“" .. text .. "”"
end

local function get_accent_info(form)
	-- Get position of accent (nth vowel from beginning of word).
	local accent = {}
	local is_suffix = form:sub(1, 1) == '-'
	accent.position, accent.type = m_accent.detect_accent(form)
	-- Position: position of accent from beginning of word (number) or nil.
	-- Accent: accent name (string) or nil.
	
	-- Form must have an accent, unless it is a suffix.
	if not is_suffix and not next(accent) then
		error('No accent detected on ' .. quote(form) ..
				'. Please add an accent by copying this template and placing ' ..
				quote('/') .. ' for acute or ' .. quote('~') ..
				' for circumflex after the vowel that should be accented: {{subst:chars|grc|' .. form .. '}}.')
	end
	
	-- Accent term as proxy for distinguishing between oxytone and perispomenon.
	accent.term = m_accent.get_accent_term(form)
	
	return accent, is_suffix
end

local form_redirects = {
	AS = 'NS', VS = 'NS',
	DD = 'GD', AD = 'ND', VD = 'ND',
	AP = 'NP', VP = 'NP',
}

local form_metatable = {
	__index = function (self, form_code)
		if type(form_code) ~= 'string' then return nil end
		if form_redirects[form_code] then
			return self[form_redirects[form_code]]
		elseif form_redirects[form_code:sub(2)] then
			return self[form_code:sub(1, 1) .. form_redirects[form_code:sub(2)]]
		-- If this is a neuter form but not in the nominative case,
		-- use the corresponding masculine form.
		elseif form_code:match('N[^N].') then
			return self['M' .. form_code:sub(2)]
		end
	end,
}

local function add_redirects(form_table)
	return setmetatable(form_table, form_metatable)
end

local function add_forms(args)
	if not args.irregular then
		--add stem to forms
		local function add_stem(forms)
			return forms:gsub('%$', args.stem)
		end
		
		-- args.suffix indicates that this is a paradigm for an unaccented suffix,
		-- such as [[-εια]].
		if args.indeclinable then
			for k, v in pairs(args.ctable) do
				if k:find('[NGDAV][SDP]') then -- only format case-number forms
					args.ctable[k] = args[2]
				end
			end
		elseif args.suffix and not next(args.accent) then
			for k, v in pairs(args.ctable) do
				if k:find('[NGDAV][SDP]') then -- only format case-number forms
					args.ctable[k] = add_stem(v)
				end
			end
		else
			-- If the term is not a suffix and no accent was detected, then
			-- get_accent_info above must throw an error,
			-- or else there will be an uncaught error here.
			local add_circumflex = args.accent.type == 'circumflex'
			local recessive = -3
			
			-- Force recessive accent in the Lesbian dialect.
			local accent_position = args.dial == 'les' and recessive
					or args.accent.position
			
			-- Circumflex on monosyllabic DS and AS in consonant-stem third-
			-- declension nouns: for example, Τρῷ and Τρῶ, DS and AS of Τρώς.
			local DS_AS = args.accent_alternating == true
			
			-- Added by "kles" function: for example, Περίκλεις.
			local VS = args.recessive_VS and recessive
			local synaeresis = args.synaeresis
			
			local add_accent = m_accent.add_accent
			local function add_accent_to_forms(forms, code)
				return ugsub(forms,
					'[^/]+',
					function(form)
						return add_accent(form,
							code == 'VS' and VS or accent_position,
							{
								synaeresis = synaeresis,
								circumflex = (code == 'DS' or code == 'AS') and DS_AS or add_circumflex,
								short_diphthong = true,
							})
					end)
			end
			
			for k, v in pairs(args.ctable) do
				if k:find('[NGDAV][SDP]') then -- only format case-number forms
					args.ctable[k] = add_accent_to_forms(add_stem(v), k)
				end
			end
		end
	end
end

local gender_codes = { 'M', 'F', 'N' }
local case_codes = { 'N', 'G', 'D', 'A', 'V' }
local number_codes = { 'S', 'D', 'P' }
local function handle_noun_overrides(form_table, override_table)
	for _, case in ipairs(case_codes) do
		for _, number in ipairs(number_codes) do
			local key = case .. number
			if override_table[key] then 
				require('Module:debug').track('grc-decl/form-override')
			end
			form_table[key] = override_table[key] or form_table[key]
		end
	end
end

local function handle_adjective_overrides(form_table, override_table)
	for _, gender in ipairs(gender_codes) do
		for _, case in ipairs(case_codes) do
			for _, number in ipairs(number_codes) do
				local key = gender .. case .. number
				if override_table[key] then 
					require('Module:debug').track('grc-adecl/form-override')
				end
				form_table[key] = override_table[key] or form_table[key]
			end
		end
	end
end

--[=[
	Gets stem-ending combinations from [[Module:grc-decl/decl/data]]
	and [[Module:grc-decl/decl/staticdata]]. Called a single time to get forms
	of a noun, and two or three times by make_decl_adj for each of the genders
	of an adjective.
]=]
function export.make_decl(args, decl, root, is_adjective)
	if not export.inflections[decl] then
		error('Inflection type ' .. quote(decl) .. ' not found in [[' .. module_path .. "/data]].")
	end
	if args.adjective and args.irregular then
		error('Irregular adjectives are not handled by make_decl.')
	end
	
	if not root then
		error('No root for ' .. args[1] .. '.')
	end
	args.stem = root
	
	export.inflections[decl](args)
	args.gender[1] = args.gender[1] or args.ctable['g']
	args.declheader = args.declheader or args.ctable['decl']
	add_forms(args)
	if not is_adjective then
		handle_noun_overrides(args.ctable, args)
	end
	add_redirects(args.ctable)
end

-- String (comparative ending), function (input: root; output: comparative),
-- false (the declension has no comparative form), or nil (use the if-statements
-- to determine a comparative form).
local decl_to_comp = {
	['1&3-ᾰν'] = 'ᾰ́ντερος',
	['1&3-εν'] = 'έντερος',
	['1&3-εσσ'] = 'έστερος', -- hopefully this is general?
	['1&3-ups'] = 'ῠ́τερος',
	['3rd-cons'] = function(root)
		local last2 = usub(root, -2)
		if last2 == 'ον' then
			return root .. 'έστερος'
		elseif last2 == 'εσ' then
			return root:gsub('εσ$', 'έστερος')
		else
			return false
		end
	end,
	['1&3-οτ'] = false,
	['3rd-εσ'] = 'έστερος',
	['3rd-εσ-open'] = 'έστερος',
	['1&2-alp-con'] = 'εώτερος', -- I assume—though I can't find examples
	['1&2-eta-con'] = 'εώτερος',
}

local function retrieve_comp(root, decl_type)
	local data = decl_to_comp[decl_type]
	if not data then
		return data
	elseif type(data) == 'string' then
		return root .. data
	elseif type(data) == 'function' then
		return data(root)
	else
		error('Data for ' .. decl_type .. ' is invalid.')
	end
end

-- Constructs an adverb, comparative, and superlative.
function export.make_acs(args)
	-- input:
	-- strings
	local root, decl_type = args.root, args.decl_type
	-- tables
	local accent, atable = args.accent, args.atable
	-- output:
	local comp = retrieve_comp(root, decl_type)
	local super, adv
	
	if comp == nil then
		local alpha_nonultima = decl_type == '1&2-alp' and
				accent.term ~= 'oxytone' and
				accent.term ~= 'perispomenon'
		local last3 = usub(root, -3)
		if alpha_nonultima and last3 == 'τερ' then
			comp = '(' .. atable['MNS'] .. ')'
			adv = atable['NNS']
			-- ?
			-- comp = nil
		elseif alpha_nonultima and last3 == 'τᾰτ' then
			super = '(' .. atable['MNS'] .. ')'
			adv = atable['NNP']
			-- ?
			-- super = nil
		elseif decl_type:find('ντ') then
			comp = nil -- participles
			super = nil
		elseif (m_accent.get_weight(root, 1) == "light" or decl_type:find('att$')) then
			comp = root .. 'ώτερος'
		else
			comp = root .. 'ότερος'
		end
	end
	atable.adv = adv
		-- Actually neuter accusative singular. This is correct for -τερος and
		-- for μείζων; also for all comparatives in -ων?
		or args.comparative and atable.NNS
		-- actually neuter accusative plural
		or args.superlative and atable.NNP
		or atable.MGP and atable.MGP:gsub('ν$', 'ς'):gsub('ν<', 'ς<')
	atable.comp = comp
	atable.super = super or comp and comp:gsub('ερος$', 'ᾰτος')
	
	-- Remove comparative and superlative if adjective is a comparative or superlative.
	-- Parameters that trigger this condition are |deg=comp, |deg=super, and the
	-- deprecated |form=comp.
	if args.comparative or args.superlative then
		atable.comp, atable.super = nil, nil
	end
	
	for _, form in ipairs { 'adv', 'comp', 'super' } do
		if args[form] == "-" then
			atable[form] = nil
		elseif args[form] then
			atable[form] = args[form]
		end
	end
end

--[[
	noun_table contains case-number forms.
	adjective_table will contain gender-case-number forms.
	override_table contains gender-case-number forms that will override the
	forms in noun_table.
]]
local function transfer_forms_to_adjective_table(adjective_table, noun_table, gender_code)
	for case_and_number_code, form in pairs(noun_table) do
		adjective_table[gender_code .. case_and_number_code] = form
	end
end

--[=[
	Interprets the table for the adjective's inflection type
	in [[Module:grc-decl/decl/staticdata]].
]=]
function export.make_decl_adj(args, ct)
	if args.irregular then
		return export.inflections['irreg-adj'](args)
	end
	
	--[[
		Two possibilities, with the indices of the table of endings
		and the stem augmentation that they use:
			- masculine–feminine (1, a1), neuter (2, a2)
			- masculine (1, a1), feminine (2, a2), neuter (3, a1)
	]]
	-- Masculine or masculine and feminine forms.
	export.make_decl(args, ct[1], args.root .. (ct.a1 or ''), true)
	transfer_forms_to_adjective_table(args.atable, args.ctable, 'M')
	
	-- Feminine or neuter forms.
	if ct[2] then
		export.make_decl(args, ct[2], args.fstem or (args.root .. (ct.a2 or '')), true)
		transfer_forms_to_adjective_table(args.atable, args.ctable, 'F')
	end
	
	export.make_decl(args, ct[3], args.root .. (ct.a1 or ''), true)
	transfer_forms_to_adjective_table(args.atable, args.ctable, 'N')
	
	add_redirects(args.atable)
	args.ctable = nil
	export.make_acs(args)
	handle_adjective_overrides(args.atable, args)
	args.adeclheader = ct.adeclheader or 'Declension'
end

-- This function requires NFC forms for [[Module:grc-decl/decl/classes]],
-- but NFD forms for [[Module:grc-decl/decl/data]].
function export.get_decl(args)
	if args.indeclinable then
		if not args[2] then error("Specify the indeclinable form in the 2nd parameter.") end
		args.decl_type, args.root = 'indecl', ''
		return
	elseif args.irregular then
		if args.gender[1] == "N" then
			args.decl_type, args.root = 'irregN', ''
		else
			args.decl_type, args.root = 'irreg', ''
		end
		return
	elseif not (args[1] and args[2]) then
		error("Use the 1st and 2nd parameters for the nominative and genitive singular.")
	end
	
	local infl_info = m_classes.infl_info.noun
	
	args[1] = compose(args[1])
	args[2] = compose(args[2])
	
	local arg1, arg2 = args[1], args[2]
	
	local nom_without_accent = compose(m_accent.strip_tone(arg1))
	local gen_without_accent = compose(m_accent.strip_tone(arg2))
	
	local decl_types_by_genitive_ending, decl_type, root
	local nominative_matches = {}
	for i = -infl_info.longest_nominative_ending, -1 do
		local nominative_ending = usub(nom_without_accent, i)
		local decl_types_by_genitive_ending = infl_info[nominative_ending]
		-- If decl_types_by_genitive_ending is a string, then it is the key of
		-- another table in infl_info, a nominative ending with a macron or
		-- breve (ι → ῐ).
		if type(decl_types_by_genitive_ending) == "string" then
			decl_types_by_genitive_ending = infl_info[decl_types_by_genitive_ending]
		end
		
		if decl_types_by_genitive_ending then
			table.insert(nominative_matches, decl_types_by_genitive_ending)
			root = usub(nom_without_accent, 1, -1 - ulen(nominative_ending))
			
			for i = -6, -1 do
				local genitive_ending = usub(gen_without_accent, i)
				local name = decl_types_by_genitive_ending[genitive_ending]
				if name then
					decl_type = name
					break
				end
			end
			
			if decl_type then
				break
			end
		end
	end
	
	args.accent, args.suffix = get_accent_info(arg1)
	
	if decl_type and root then
		if args.contracted == 'false' and not decl_type:find('open') then
			decl_type = decl_type .. '-open'
		end
		args.decl_type, args.root = decl_type, decompose(root)
		
		return
	elseif gen_without_accent:find('ος$') then
		local root = decompose(usub(gen_without_accent, 1, -3))
		if args.gender[1] == "N" or ufind(root, 'α[̆̄]τ$') and not (args.gender[1] == "M" and args.gender[2] == "F") then
			args.decl_type, args.root = '3rd-N-cons', root
		else
			args.decl_type, args.root = '3rd-cons', root
		end
		
		return
	end
	
	if nominative_matches[1] then
		local m_table = require 'Module:table'
		local fun, grc =
			require 'Module:fun', require 'Module:languages'.getByCode 'grc'
		local make_sort_key = fun.memoize(
			function (term)
				return grc:makeSortKey(term)
			end)
		
		if nominative_matches[2] then
			local new_nominative_matches = {}
			for _, matches in ipairs(nominative_matches) do
				for k, v in pairs(matches) do
					new_nominative_matches[k] = v
				end
			end
			nominative_matches = new_nominative_matches
		else
			nominative_matches = nominative_matches[1]
		end
		
		local gens = require 'Module:fun'.map(
			function (gen)
				return quote("-" .. gen)
			end,
			m_table.keysToList(
				nominative_matches,
				function (gen1, gen2)
					local sort_key1, sort_key2 =
						make_sort_key(gen1), make_sort_key(gen2)
					if sort_key1 == sort_key2 then
						return gen1 < gen2
					else
						return sort_key1 < sort_key2
					end
				end))
		
		local agreement
		if #gens > 1 then
			agreement = { "Declensions were", "s ", " do" }
		else
			agreement = { "A declension was", " ", " does" }
		end
		gens = table.concat(gens, ", ")
		
		error(agreement[1] .. " found that matched the ending of the nominative form " .. quote(arg1) ..
				", but the genitive ending" .. agreement[2] .. gens ..
				agreement[3] .. " not match the genitive form " .. quote(arg2) .. ".")
	else
		for nom, gens in pairs(m_classes.ambig_forms) do
			if arg1:find(nom .. "$") then
				for gen, _ in pairs(gens) do
					if arg2:find(gen .. "$") then
						error("No declension found for nominative " .. quote(arg1) .. " and genitive " .. quote(arg2) ..
								". There are two declensions with nominative " .. quote("-" .. nom) ..
								" and genitive " .. quote("-" .. gen) ..
								". To indicate which one you mean, mark the vowel length of the endings with a macron or breve.")
					end
				end
			end
		end
		
		error("Can’t find a declension type for nominative " .. quote(arg1) .. " and genitive " .. quote(arg2) .. ".")
	end
end

-- This function requires NFC forms for [[Module:grc-decl/decl/classes]],
-- but NFD forms for [[Module:grc-decl/decl/data]].
function export.get_decl_adj(args)
	if args.irregular then
		args.decl_type, args.root = 'irreg', ''
		return
	elseif not args[1] then
		error('Use the 1st and 2nd parameters for the masculine and the ' ..
			'feminine or neuter nominative singular, or the first parameter ' ..
			' alone for the 3rd declension stem.')
	end
	
	args[1] = compose(args[1])
	if args[2] then
		args[2] = compose(args[2])
	end
	
	local arg1, arg2 = args[1], args[2]
	
	local mstrip = compose(m_accent.strip_tone(arg1))
	local fstrip
	if arg2 then
		fstrip = compose(m_accent.strip_tone(arg2))
	else
		args.accent, args.suffix = get_accent_info(arg1)
		
		args.decl_type, args.root = '3rd-cons', decompose(mstrip)
		
		return
	end
	
	local infl_info = m_classes.infl_info.adj
	
	-- See if last three or two characters of masc have an entry.
	local masc, decl
	for i = -infl_info.longest_masculine_ending, -2 do
		local ending = usub(mstrip, i)
		local data = infl_info[ending]
		if data then
			masc = ending
			decl = data
			break
		end
	end
	
	-- Allows redirecting, so that macrons or breves can be omitted for instance.
	if type(decl) == "string" then
		decl = infl_info[decl]
	end
	
	if decl then
		-- Look for a feminine ending that matches the end of the feminine form.
		local fem, name
		for feminine, decl_name in pairs(decl) do
			if fstrip:find(feminine .. '$') then
				fem = feminine
				name = decl_name:gsub("%d$", "")
				break
			end
		end
		
		if fem then
			args.accent, args.suffix = get_accent_info(arg1)
			
			-- The only indication that λέγων, λέγουσᾰ (stem λεγοντ-) and
			-- ποιῶν, ποιοῦσᾰ (stem ποιουντ-) have different stems is the
			-- accentuation of the masculine form.
			if name == '1&3-οντ' and args.accent.term == 'perispomenon' then
				name = '1&3-οντ-con'
			end
			
			if not export.adjinflections[name] then
				error('Inflection recognition failed. Function for generated inflection code ' ..
						quote(name) .. ' not found in [[' .. module_path .. "/data]].")
			end
			
			args.decl_type, args.root = name, decompose(mstrip:gsub(masc .. "$", ""))
			
			return
		else
			-- No declension type found.
			local fems = {}
			local is_neuter = false
			for fem in pairs(decl) do
				if fem == "ον" then
					is_neuter = true
				end
				table.insert(fems, quote("-" .. fem))
			end
			fems = table.concat(fems, ", ")
			local agreement = { "A declension was", " ", " does" }
			if #fems > 1 then
				agreement = { "Declensions were", "s ", " do" }
			end
			error(agreement[1] .. " found that matched the ending of the masculine " .. quote(arg1) ..
					", but the corresponding feminine" .. (is_neuter and " and neuter" or "") .. " ending" .. agreement[2] .. fems ..
					agreement[3] .. " not match the feminine " .. quote(arg2) .. ".")
		end
	end
	error("Can’t find a declension type for masculine " .. quote(arg1) .. " and feminine or neuter " .. quote(arg2) .. ".")
end

--[[
	Returns a table containing the inflected forms of the article,
	to be placed before each inflected noun form.
]]
function export.infl_art(args)
	if args.dial == 'epi' or args.adjective or args.no_article then
		return {}
	end
	
	local art = {}
	local arttable
	
	if args.gender[1] then
		arttable = m_paradigms.art_att[args.gender[1]]
	else
		error('Gender not specified.')
	end
	for code, suffix in pairs(arttable) do
		if (args.gender[1] == "M" and args.gender[2] == "F") and
				m_paradigms.art_att.M[code] ~= m_paradigms.art_att.F[code] then
			art[code] = m_paradigms.art_att.M[code] .. ', ' .. m_paradigms.art_att.F[code]
		else
			art[code] = suffix
		end
	end
	
	if args.gender[1] == 'F' then
		if m_dialect_groups['nonIA'][args.dial] then
			art['NS'] = 'ᾱ̔' -- 104.1-4
			art['GS'] = 'τᾶς'
			art['DS'] = 'τᾷ'
			art['AS'] = 'τᾱ̀ν'
		end
		
		if args.dial == 'the' or args.dial == 'les' then
			art['DS'] = 'τᾶ' -- 39
		elseif args.dial == 'boi' or args.dial == 'ara' or args.dial == 'ele' then
			art['DS'] = 'ται' -- 104.3
		end
		
		if m_dialect_groups['nonIA'][args.dial] then
			art['GP'] = 'τᾶν' -- 104.6
		end
		
		if args.dial == 'ato' then
			art['DP'] = 'τῆσῐ(ν)' -- 104.7
		elseif args.dial == 'ion' then
			art['DP'] = 'τῇσῐ(ν)' -- 104.7
		end
		
		if m_dialect_groups['buck78'][args.dial] then
			art['AP'] = 'τᾰ̀ς' -- 104.8
		elseif args.dial == 'kre' or args.dial == 'arg' then
			art['AP'] = 'τὰνς'
		elseif args.dial == 'les' then
			art['AP'] = 'ταῖς'
		elseif args.dial == 'ele' then
			art['AP'] = 'ταὶρ'
		end
		
		if args.dial == 'kre' or args.dial == 'les' or args.dial == 'kyp' then
			art['NS'] = 'ᾱ̓' -- 57
			art['NP'] = 'αἰ'
		elseif args.dial == 'ele' then
			art['NS'] = 'ᾱ̓'
			art['NP'] = 'ταὶ'
		elseif args.dial == 'boi' then
			art['NP'] = 'τὴ' -- 104.5
		elseif m_dialect_groups['west'][args.dial] then --boeotian is covered above
			art['NP'] = 'ταὶ'
		end
	elseif args.gender[1] == 'M' or args.gender[1] == 'N' then
		if args.dial == 'the' then
			art['GS'] = 'τοῖ' -- 106.1
			art['DS'] = 'τοῦ' -- 23
			art['ND'] = 'τοὺ'
			art['GP'] = 'τοῦν'
		end
		
		if args.dial == 'les' then
			art['DS'] = 'τῶ' -- 106.2
		elseif args.dial == 'boi' or args.dial == 'ara' or args.dial == 'ele' or args.dial == 'eub' then
			art['DS'] = 'τοι' -- 106.2
		end
		
		if args.dial == 'ato' or args.dial == 'ion' then
			art['DP'] = 'τοῖσῐ(ν)' -- 106.4
		end
		
		if args.gender[1] == 'M' then
			if m_dialect_groups['buck78'][args.dial] then
				art['AP'] = 'τὸς' -- 106.5
			elseif args.dial == 'kre' or args.dial == 'arg' then
				art['AP'] = 'τὸνς'
			elseif args.dial == 'les' then
				art['AP'] = 'τοῖς'
			elseif args.dial == 'ele' then
				art['AP'] = 'τοὶρ'
			elseif m_dialect_groups['severe'][args.dial] or args.dial == 'boi' then
				art['AP'] = 'τὼς'
			end
			
			if args.dial == 'kre' or args.dial == 'les' or args.dial == 'kyp' then
				art['NS'] = 'ὀ' -- 57
				art['NP'] = 'οἰ'
			elseif args.dial == 'ele' then
				art['NS'] = 'ὀ'
				art['NP'] = 'τοὶ'
			elseif m_dialect_groups['west'][args.dial] or args.dial == 'boi' then
				art['NP'] = 'τοὶ'
			end
		end
		
		if args.dial == 'ele' then
			art['GD'] = 'τοίοις'
			--		elseif args.dial == 'ara' then
			--			art['GD'] = 'τοιυν'
		end
	end
	
	return art
end
	
local lang = require("Module:languages").getByCode("grc")
local function tag(text)
	return require("Module:script utilities").tag_text("-" .. text, lang)
end

local function print_detection_table(detection_table, labels, noun)
	local out = require('Module:array')()
	
	local function sort(item1, item2)
		-- Put 'longest_nominative_ending' and 'longest_masculine_ending' first.
		if item1:find '^longest' or item2:find '^longest' then
			return item1:find '^longest' ~= nil
		end
		
		local sort1, sort2 = lang:makeSortKey(item1), lang:makeSortKey(item2)
		local decomp_length1, decomp_length2 = ulen(decompose(item1)), ulen(decompose(item2))
		
		if sort1 == sort2 then
			-- Sort ᾱ or ᾰ before α.
			if decomp_length1 > decomp_length2 then
				return true
			else
				return false
			end
		else
			return sort1 < sort2
		end
	end
	
	for key1, value1 in require("Module:table").sortedPairs(detection_table, sort) do
		if key1:find '^longest' then
			out:insert('* ' .. key1:gsub('_', ' ') .. ': ' .. value1 .. ' characters')
		else
			table.insert(out, "\n* " .. labels[1] .. " " .. tag(key1))
			if type(value1) == "string" then
				out:insert(" &rarr; " .. tag(value1))
			elseif type(value1) == "table" then
				for key2, value2 in require("Module:table").sortedPairs(value1, sort) do
					-- mw.log(len(key1), len(key2))
					out:insert("\n** " ..
							(noun and labels[2] or key2 == "ον" and "neuter" or "feminine") ..
							" " .. tag(key2) .. ": <code>" .. value2 .. "</code>")
					if noun then
						out:insert(" (<code>" .. (m_classes.conversion[value2] or "?") .. "</code>)")
					end
				end
			end
		end
	end
	
	return out:concat()
end
	

function export.show_noun_categories(frame)
	return print_detection_table(m_classes.infl_info.noun, { "nominative", "genitive" }, true)
end


function export.show_adj_categories(frame)
	return print_detection_table(m_classes.infl_info.adj, { "masculine", "feminine or neuter" })
end

return export