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module statix/cons
imports
statix/name
statix/type
statix/util
rules // Constructor reusable predicates
: scope * list(TYPE) * TYPE * string -> TYPE
declareConstructor(, Tsymbols, Tsort, ) = :- {}
Tprod == PROD(Tsymbols, Tsort),
s -> Constructor{name} with typeOfDecl Tprod,
typeOfDecl of Constructor{name} in s |-> results,
onlyOneOf(Tprod, results) | error $[Duplicate definition of constructor [name]]@name,
@name.type := Tprod.
typeOfConstructor : scope * string -> TYPE
typeOfConstructor(s, ) = :- {}
typeOfDecl of Constructor{name} in s |-> paths,
resolveConstructors(name, paths, NON_EMPTY()) == Tprod,
@name.type := Tprod.
: string * list((path * (occurrence * TYPE))) * EMPTINESS -> TYPE
resolveConstructors(, [(_, (Constructor{name'}, Tprod))|paths], _) = Tprod :-
@name.ref += name',
resolveConstructors(name, paths, MAYBE_EMPTY()) == Tprod.
resolveConstructors(, [], NON_EMPTY()) = _ :- false | error $[Constructor [name] not defined]@name.
resolveConstructors(name, [], MAYBE_EMPTY()) = _.
: scope * string * TYPE -> TYPE
typeOfConstructorInSort(s, , Tsort) = :- {}
typeOfDecl of Constructor{name} in s |-> paths,
resolveConstructorsInSort(name, Tsort, paths, NON_EMPTY()) == Tprod,
@name.type := Tprod.
: string * TYPE * list((path * (occurrence * TYPE))) * EMPTINESS -> TYPE
resolveConstructorsInSort(, Tsort, [(_, (Constructor{name'}, Tprod@PROD(_, Tsort)))|paths], _) = Tprod :-
@name.ref += name',
resolveConstructorsInSort(name, Tsort, paths, MAYBE_EMPTY()) == _.
resolveConstructorsInSort(name, Tsort, [(_, (Constructor{name'}, _))|paths], emptiness) = Tprod :-
resolveConstructorsInSort(name, Tsort, paths, emptiness) == Tprod.
resolveConstructorsInSort(, Tsort, [], NON_EMPTY()) = _ :- false | error $[Constructor [name] not defined in [Tsort]]@name.
resolveConstructorsInSort(name, Tsort, [], MAYBE_EMPTY()) = _.
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