Module `Structures.Structure`

A structure S is a non recursive inductive type with a single constructor

type projection = { proj_name : Names.Name.t; field name proj_true : bool; false = projection for a defined field (letin) proj_canonical : bool; false = not to be used for CS inference proj_body : Names.Constant.t option; the projection function }: A projection to a structure field

type t = { name : Names.inductive; projections : projection list; nparams : int; }

val make : Environ.env -> Names.inductive -> projection list -> t
val register : t -> unit
val subst : Mod_subst.substitution -> t -> t
val rebuild : Environ.env -> t -> t: refreshes nparams, e.g. after section discharging

val find : Names.inductive -> t: find isp returns the Structure.t associated to the inductive path isp if it corresponds to a structure, otherwise it fails with Not_found

val find_from_projection : Names.Constant.t -> t: raise Not_found if not a structure projection

val find_projections : Names.inductive -> Names.Constant.t option list: lookup_projections isp returns the projections associated to the inductive path isp if it corresponds to a structure, otherwise it fails with Not_found

val projection_nparams : Names.Constant.t -> int: raise Not_found if not a projection

val is_projection : Names.Constant.t -> bool