heptagon/compiler/global/names.ml

(** Define qualified names "Module.name" (longname)
  [shortname] longname -> name
  [fullname] longname -> Module.name *)

type name = string

type longname =
    | Name of name
    | Modname of qualident

and qualident = { qual: string; id: string }

module NamesM = struct
  type t = name
  let compare = compare
end

module NamesEnv =
struct
  include (Map.Make(NamesM))

  let append env0 env =
    fold (fun key v env -> add key v env) env0 env
end

module S = Set.Make (struct type t = string let compare = compare end)


let shortname = function
  | Name s -> s
  | Modname { id = id; } -> id

let fullname = function
  | Name s -> s
  | Modname { qual = qual; id = id; } -> qual ^ "." ^ id

let mk_longname s =
  try
    let ind = String.index s '.' in
    let id = String.sub s (ind + 1) (String.length s - ind - 1) in
    Modname { qual = String.sub s 0 ind; id = id; }
  with Not_found -> Name s

(** Are infix
  [or], [quo], [mod], [land], [lor], [lxor], [lsl], [lsr], [asr]
  and every names not beginning with 'a' .. 'z' | 'A' .. 'Z' | '_' | '`'*)
let is_infix s =
  let module StrSet = Set.Make(String) in
  let infix_set =
    List.fold_right StrSet.add
      ["or"; "quo"; "mod"; "land"; "lor"; "lxor"; "lsl"; "lsr"; "asr"]
      StrSet.empty in
  if StrSet.mem s infix_set then true
  else (match String.get s 0 with
        | 'a' .. 'z' | 'A' .. 'Z' | '_' | '`' -> false
        | _ -> true)

let print_name ff n =
  let n = if is_infix n
    then "( " ^ (n ^ " )") (* do not remove the space around n, since for example "(*" would create bugs *)
    else n
  in Format.fprintf ff "%s" n
  
let print_longname ff n =
  match n with
  | Name m -> print_name ff m
  | Modname { qual = "Pervasives"; id = m } -> print_name ff m
  | Modname { qual = m1; id = m2 } -> (Format.fprintf ff "%s." m1; print_name ff m2)