This module is used for Dutch headword-line templates.

The module is always invoked the same way, by passing a single parameter to the "show" function. This parameter is the name of the part of speech, but in plural (examples given are for nouns, and for adjective forms respectively):

{{#invoke:nl-headword|show|nouns}}
{{#invoke:nl-headword|show|adjective forms}}

The template will, by default, accept the following parameters (specific parts of speech may accept or require others):

  • |head= - Override the headword display, used to add links to individual words in a multi-word term.
  • |cat= - Override the default category, which is the same as the provided parameter. This may sometimes be useful if you have a word that is really, say, an interjection, but you want it to show inflection as if it were an adjective.

There is no parameter for the sort key, because this is not necessary. The sort key is automatically generated according to the normal alphabetical ordering in Dutch.


local export = {}
local pos_functions = {}

local lang = require("Module:languages").getByCode("nl")

-- The main entry point.
-- This is the only function that can be invoked from a template.
function export.show(frame)
	PAGENAME = mw.title.getCurrentTitle().text
	
	-- The part of speech. This is also the name of the category that
	-- entries go in. However, the two are separate (the "cat" parameter)
	-- because you sometimes want something to behave as an adjective without
	-- putting it in the adjectives category.
	local poscat = frame.args[1] or error("Part of speech has not been specified. Please pass parameter 1 to the module invocation.")
	
	local params = {
		["head"] = {list = true},
	}
	
	if pos_functions[poscat] then
		for key, val in pairs(pos_functions[poscat].params) do
			params[key] = val
		end
	end
	
	local args = require("Module:parameters").process(frame:getParent().args, params)
	
	local data = {lang = lang, pos_category = poscat, categories = {}, heads = args["head"], genders = {}, inflections = {}, tracking_categories = {}}
	
	if pos_functions[poscat] then
		pos_functions[poscat].func(args, data)
	end
	
	return require("Module:headword").full_headword(data) ..
		require("Module:utilities").format_categories(data.tracking_categories, lang, nil)
end

-- Display additional inflection information for an adjective
pos_functions["adjectives"] = {
	params = {
		[1] = {list = "comp"},
		[2] = {list = "sup"},
		[3] = {},
		},
	func = function(args, data)
		local mode = args[1][1]
		
		if mode == "inv" then
			table.insert(data.inflections, {label = "[[Appendix:Glossary#invariable|invariable]]"})
			table.insert(data.categories, "Dutch indeclinable adjectives")
			args[1][1] = args[2][1]
			args[2][1] = args[3]
		elseif mode == "pred" then
			table.insert(data.inflections, {label = "used only [[predicative]]ly"})
			table.insert(data.categories, "Dutch predicative-only adjectives")
			args[1][1] = args[2][1]
			args[2][1] = args[3]
		end
		
		local comp_mode = args[1][1]
		
		if comp_mode == "-" then
			table.insert(data.inflections, {label = "not [[Appendix:Glossary#comparable|comparable]]"})
		else
			-- Gather parameters
			local comparatives = args[1]
			comparatives.label = "[[Appendix:Glossary#comparative|comparative]]"
			
			local superlatives = args[2]
			superlatives.label = "[[Appendix:Glossary#superlative|superlative]]"
			
			-- Generate forms if none were given
			if #comparatives == 0 then
				if mode == "inv" or mode == "pred" then
					table.insert(comparatives, "peri")
				else
					table.insert(comparatives, require("Module:nl-adjectives").make_comparative(PAGENAME))
				end
			end
			
			if #superlatives == 0 then
				if mode == "inv" or mode == "pred" then
					table.insert(superlatives, "peri")
				else
					-- Add preferred periphrastic superlative, if necessary
					if
						PAGENAME:find("[iï]de$") or PAGENAME:find("[^eio]e$") or
						PAGENAME:find("s$") or PAGENAME:find("sch$") or PAGENAME:find("x$") or
						PAGENAME:find("sd$") or PAGENAME:find("st$") or PAGENAME:find("sk$") then
						table.insert(superlatives, "peri")
					end
					
					table.insert(superlatives, require("Module:nl-adjectives").make_superlative(PAGENAME))
				end
			end
			
			-- Replace "peri" with phrase
			for key, val in ipairs(comparatives) do
				if val == "peri" then comparatives[key] = "[[meer]] " .. PAGENAME end
			end
			
			for key, val in ipairs(superlatives) do
				if val == "peri" then superlatives[key] = "[[meest]] " .. PAGENAME end
			end
			
			table.insert(data.inflections, comparatives)
			table.insert(data.inflections, superlatives)
		end
	end
}

-- Display additional inflection information for an adverb
pos_functions["adverbs"] = {
	params = {
		[1] = {},
		[2] = {},
		},
	func = function(args, data)
		local comp = args[1]
		local sup = args[2]
		
		if comp then
			if not sup then
				sup = PAGENAME .. "st"
			end
			
			table.insert(data.inflections, {label = "[[Appendix:Glossary#comparative|comparative]]", comp})
			table.insert(data.inflections, {label = "[[Appendix:Glossary#superlative|superlative]]", sup})
		end
	end
}

-- Display information for a noun's gender
-- This is separate so that it can also be used for proper nouns
function noun_gender(args, data)
	for _, g in ipairs(args[1]) do
		if g == "c" then
			table.insert(data.categories, "Dutch nouns with common gender")
		elseif g == "p" then
			table.insert(data.categories, "Dutch pluralia tantum")
		elseif g ~= "m" and g ~= "f" and g ~= "n" then
			g = nil
		end
		
		table.insert(data.genders, g)
	end
	
	if #data.genders == 0 then
		table.insert(data.genders, "?")
	end
	
	-- Most nouns that are listed as f+m should really have only f
	if data.genders[1] == "f" and data.genders[2] == "m" then
		table.insert(data.categories, "Dutch nouns with f+m gender")
	end
end

pos_functions["proper nouns"] = {
	params = {
		[1] = {list = "g"},
		},
	func = function(args, data)
		noun_gender(args, data)
	end
}

-- Display additional inflection information for a noun
pos_functions["nouns"] = {
	params = {
		[1] = {list = "g"},
		[2] = {list = "pl"},
		[3] = {list = "dim"},
		
		["f"] = {list = true},
		["m"] = {list = true},
		},
	func = function(args, data)
		noun_gender(args, data)
		
		local plurals = args[2]
		local diminutives = args[3]
		local feminines = args["f"]
		local masculines = args["m"]
		
		-- Plural
		if data.genders[1] == "p" then
			table.insert(data.inflections, {label = "[[Appendix:Glossary#plural only|plural only]]"})
		elseif plurals[1] == "-" then
			table.insert(data.inflections, {label = "[[Appendix:Glossary#uncountable|uncountable]]"})
			table.insert(data.categories, "Dutch uncountable nouns")
		else
			local generated = generate_plurals(PAGENAME)
			
			-- Process the plural forms
			for i, p in ipairs(plurals) do
				-- Is this a shortcut form?
				if p:sub(1,1) == "-" then
					if not generated[p] then
						error("The shortcut plural " .. p .. " could not be generated.")
					end
					
					if p:sub(-2) == "es" then
						table.insert(data.categories, "Dutch nouns with plural in -es")
					elseif p:sub(-1) == "s" then
						table.insert(data.categories, "Dutch nouns with plural in -s")
					elseif p:sub(-4) == "eren" then
						table.insert(data.categories, "Dutch nouns with plural in -eren")
					else
						table.insert(data.categories, "Dutch nouns with plural in -en")
					end
					
					if p:sub(2,2) == ":" then
						table.insert(data.categories, "Dutch nouns with lengthened vowel in the plural")
					end
					
					p = generated[p]
				-- Not a shortcut form, but the plural form specified directly.
				else
					local matches = {}
					
					for pi, g in pairs(generated) do
						if g == p then
							table.insert(matches, pi)
						end
					end
					
					if #matches > 0 then
						table.insert(data.tracking_categories, "nl-noun plural matches generated form")
					elseif not PAGENAME:find("[ -]") then
						if p == PAGENAME then
							table.insert(data.categories, "Dutch indeclinable nouns")
						elseif
							p == PAGENAME .. "den" or p == PAGENAME:gsub("ee$", "eden") or
							p == PAGENAME .. "des" or p == PAGENAME:gsub("ee$", "edes") then
							table.insert(data.categories, "Dutch nouns with plural in -den")
						elseif p == PAGENAME:gsub("([ao])$", "%1%1ien") or p == PAGENAME:gsub("oe$", "oeien") then
							table.insert(data.categories, "Dutch nouns with glide vowel in plural")
						elseif p == PAGENAME:gsub("y$", "ies") then
							table.insert(data.categories, "Dutch nouns with English plurals")
						elseif
							p == PAGENAME:gsub("a$", "ae") or
							p == PAGENAME:gsub("[ei]x$", "ices") or
							p == PAGENAME:gsub("is$", "es") or
							p == PAGENAME:gsub("men$", "mina") or
							p == PAGENAME:gsub("ns$", "ntia") or
							p == PAGENAME:gsub("o$", "ones") or
							p == PAGENAME:gsub("o$", "onen") or
							p == PAGENAME:gsub("s$", "tes") or
							p == PAGENAME:gsub("us$", "era") or
							p == mw.ustring.gsub(PAGENAME, "[uü]s$", "i") or
							p == mw.ustring.gsub(PAGENAME, "[uü]m$", "a") or
							p == PAGENAME:gsub("x$", "ges") then
							table.insert(data.categories, "Dutch nouns with Latin plurals")
						elseif
							p == PAGENAME:gsub("os$", "oi") or
							p == PAGENAME:gsub("on$", "a") or
							p == PAGENAME:gsub("a$", "ata") then
							table.insert(data.categories, "Dutch nouns with Greek plurals")
						else
							table.insert(data.categories, "Dutch irregular nouns")
						end
						
						if plural and not mw.title.new(plural).exists then
							table.insert(data.categories, "Dutch nouns with missing plurals")
						end
					end
				end
				
				plurals[i] = p
			end
			
			-- Add the plural forms
			plurals.label = "plural"
			plurals.accel = {form = "p"}
			plurals.request = true
			table.insert(data.inflections, plurals)
		end
		
		-- Add the diminutive forms
		if diminutives[1] == "-" then
			-- do nothing
		else
			-- Process the diminutive forms
			for i, p in ipairs(diminutives) do
				diminutives[i] = {term = p, genders = {"n"}}
			end
			
			diminutives.label = "[[Appendix:Glossary#diminutive|diminutive]]"
			diminutives.accel = {form = "diminutive"}
			diminutives.request = true
			table.insert(data.inflections, diminutives)
		end
		
		-- Add the feminine forms
		if #feminines > 0 then
			feminines.label = "feminine"
			table.insert(data.inflections, feminines)
		end
		
		-- Add the masculine forms
		if #masculines > 0 then
			masculines.label = "masculine"
			table.insert(data.inflections, masculines)
		end
	end
}

-- Display additional inflection information for a diminutive noun
pos_functions["diminutive nouns"] = {
	params = {
		[1] = {},
		[2] = {list = "pl"},
		},
	func = function(args, data)
		if not (args[1] == "n" or args[1] == "p") then
			args[1] = {"n"}
		else
			args[1] = {args[1]}
		end
		
		if #args[2] == 0 then
			args[2] = {"-s"}
		end
		
		args[3] = {"-"}
		args["f"] = {}
		args["m"] = {}
		
		pos_functions["nouns"].func(args, data)
	end
}

function generate_plurals(PAGENAME)
	local m_common = require("Module:nl-common")
	local generated = {}
	
	generated["-s"] = PAGENAME .. "s"
	generated["-'s"] = PAGENAME .. "'s"
	
	local stem_FF = m_common.add_e(PAGENAME, false, false)
	local stem_TF = m_common.add_e(PAGENAME, true, false)
	local stem_FT = m_common.add_e(PAGENAME, false, true)
	
	generated["-es"] = stem_FF .. "s"
	generated["-@es"] = stem_TF .. "s"
	generated["-:es"] = stem_FT .. "s"
	
	generated["-en"] = stem_FF .. "n"
	generated["-@en"] = stem_TF .. "n"
	generated["-:en"] = stem_FT .. "n"
	
	generated["-eren"] = m_common.add_e(PAGENAME .. (PAGENAME:find("n$") and "d" or ""), false, false) .. "ren"
	generated["-:eren"] = stem_FT .. "ren"
	
	if PAGENAME:find("f$") then
		local stem = PAGENAME:gsub("f$", "v")
		local stem_FF = m_common.add_e(stem, false, false)
		local stem_TF = m_common.add_e(stem, true, false)
		local stem_FT = m_common.add_e(stem, false, true)
		
		generated["-ves"] = stem_FF .. "s"
		generated["-@ves"] = stem_TF .. "s"
		generated["-:ves"] = stem_FT .. "s"
		
		generated["-ven"] = stem_FF .. "n"
		generated["-@ven"] = stem_TF .. "n"
		generated["-:ven"] = stem_FT .. "n"
		
		generated["-veren"] = stem_FF .. "ren"
		generated["-:veren"] = stem_FT .. "ren"
	elseif PAGENAME:find("s$") then
		local stem = PAGENAME:gsub("s$", "z")
		local stem_FF = m_common.add_e(stem, false, false)
		local stem_TF = m_common.add_e(stem, true, false)
		local stem_FT = m_common.add_e(stem, false, true)
		
		generated["-zes"] = stem_FF .. "s"
		generated["-@zes"] = stem_TF .. "s"
		generated["-:zes"] = stem_FT .. "s"
		
		generated["-zen"] = stem_FF .. "n"
		generated["-@zen"] = stem_TF .. "n"
		generated["-:zen"] = stem_FT .. "n"
		
		generated["-zeren"] = stem_FF .. "ren"
		generated["-:zeren"] = stem_FT .. "ren"
	elseif PAGENAME:find("heid$") then
		generated["-heden"] = PAGENAME:gsub("heid$", "heden")
	end
	
	return generated
end

pos_functions["past participles"] = {
	params = {
		[1] = {},
	},
	func = function(args, data)
		if args[1] == "-" then
			table.insert(data.inflections, {label = "not used adjectivally"})
			table.insert(data.categories, "Dutch non-adjectival past participles")
		end
	end
}

pos_functions["verbs"] = {
	params = {
		[1] = {},
		},
	func = function(args, data)
		if args[1] == "-" then
			table.insert(data.inflections, {label = "not inflected"})
			table.insert(data.categories, "Dutch uninflected verbs")
		end
	end
}

return export
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