CSigMissing pervasive types from OCaml stdlib
module type USetS = sig ... endRedeclaration of OCaml set signature, to preserve compatibility. See OCaml documentation for more information. Operations which can't be efficiently implemented for HSets are moved to OSetS.
module type SetS = sig ... endOCaml set operations which require the order structure to be efficient.
module type UMapS = sig ... endmodule type MapS = sig ... end