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comp-syntax-gu-mlt/lectures/lecture05/MicroResMyeng.gf
2026-04-20 12:05:46 +02:00

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resource MicroResMyeng = {
------------------------------
-- API: overloaded paradigms
oper
mkN = overload {
mkN : (baby : Str) -> Noun
= \baby -> smartNoun baby ;
mkN : (man, men : Str) -> Noun
= \man, men -> mkNoun man men ;
} ;
mkA : Str -> Adjective
= \adj -> {s = adj} ;
mkAdv : Str -> Adverb
= \adv -> {s = adv} ;
mkV = overload {
mkV : (try : Str) -> Verb
= \try -> smartVerb try ;
mkV : (go, went, gone : Str) -> Verb
= \go, went, gone -> irregVerb go went gone ;
mkV : (sing, sings, sang, sung, singing : Str) -> Verb
= \sing, sings, sang, sung, singing ->
mkVerb sing sings sang sung singing ;
} ;
mkV2 = overload {
mkV2 : (kill : Str) -> Verb2
= \kill -> mkV kill ** {prep = ""} ;
mkV2 : (wait, for : Str) -> Verb2
= \wait, for -> mkV wait ** {prep = for} ;
mkV2 : Verb -> Verb2
= \verb -> verb ** {prep = ""} ;
} ;
------------------------------
param
Number = Sg | Pl ;
VerbForm = Inf | Pres3Sg | Past | PastPart | PresPart ;
Case = Nom | Acc ;
oper
Noun : Type = {s : Number => Str} ;
-- constructor
mkNoun : (dog, dogs : Str) -> Noun
= \dog, dogs -> {
s = table {Sg => dog ; Pl => dogs}
} ;
regNoun : (dog : Str) -> Noun
= \dog -> mkNoun dog (dog + "s") ;
smartNoun : (noun : Str) -> Noun
= \noun -> case noun of {
b + ("a" | "e" | "o" | "u") + "y" => regNoun noun ;
bab + "y" => mkNoun noun (bab + "ies") ;
_ => regNoun noun
} ;
Adjective : Type = {s : Str} ;
Adverb : Type = {s : Str} ;
Verb : Type = {s : VerbForm => Str} ;
-- constructor; worst case paradigm
mkVerb : (sing, sings, sang, sung, singing : Str) -> Verb
= \sing, sings, sang, sung, singing -> {
s = table {
Inf => sing ;
Pres3Sg => sings ;
Past => sang ;
PastPart => sung ;
PresPart => singing
}
} ;
regVerb : (walk : Str) -> Verb
= \walk ->
mkVerb walk (walk + "s") (walk + "ed")
(walk + "ed") (walk + "ing") ;
smartVerb : (verb : Str) -> Verb
= \verb -> case verb of {
b + ("a" | "e" | "o" | "u") + "y" => regVerb verb ;
cr + "y" => mkVerb verb (cr + "ies")
(cr + "ied") (cr + "ied") (cr + "ying") ;
refer + "ee" => let refereed = refer + "eed" in
mkVerb verb (verb + "s") refereed refereed (verb + "ing") ;
us + "e" => let used = us + "ed" in
mkVerb verb (verb + "s") used used (us + "ing") ;
wa + ("ch" | "sh" | "s" | "z" | "x") =>
mkVerb verb (verb + "es") (verb + "ed") (verb + "ed")
(verb + "ing") ;
_ => regVerb verb
} ;
irregVerb : (sing, sang, sung : Str) -> Verb
= \sing, sang, sung -> {s =
table {
Past => sang ;
PastPart => sung ;
x => (smartVerb sing).s ! x
}
} ;
Verb2 : Type = {s : VerbForm => Str ; prep : Str} ;
-- auxiliary for syntax
presentVerb : Verb -> Number -> Str = \verb, n ->
case n of {
Sg => verb.s ! Pres3Sg ;
Pl => verb.s ! Inf
} ;
copula : Number -> Str = \n ->
case n of {
Sg => "is" ;
Pl => "are"
} ;
}