110 lines
3.5 KiB
OCaml
110 lines
3.5 KiB
OCaml
(***********************************************************************)
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(* *)
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(* Objective Caml *)
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(* *)
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(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
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(* *)
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(* Copyright 1996 Institut National de Recherche en Informatique et *)
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(* Automatique. Distributed only by permission. *)
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(* *)
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(***********************************************************************)
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(* $Id$ *)
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(* Inclusion checks for the core language *)
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open Misc
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open Path
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open Types
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open Typedtree
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(* Inclusion between value descriptions *)
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exception Dont_match
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let value_descriptions env vd1 vd2 =
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if Ctype.moregeneral env true vd1.val_type vd2.val_type then begin
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match (vd1.val_kind, vd2.val_kind) with
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(Val_prim p1, Val_prim p2) ->
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if p1 = p2 then Tcoerce_none else raise Dont_match
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| (Val_prim p, _) -> Tcoerce_primitive p
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| (_, Val_prim p) -> raise Dont_match
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| (_, _) -> Tcoerce_none
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end else
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raise Dont_match
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(* Inclusion between type declarations *)
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let type_declarations env id decl1 decl2 =
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decl1.type_arity = decl2.type_arity &
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begin match (decl1.type_kind, decl2.type_kind) with
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(_, Type_abstract) -> true
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| (Type_variant cstrs1, Type_variant cstrs2) ->
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for_all2
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(fun (cstr1, arg1) (cstr2, arg2) ->
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cstr1 = cstr2 &
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for_all2
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(fun ty1 ty2 ->
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Ctype.equal env true (ty1::decl1.type_params)
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(ty2::decl2.type_params))
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arg1 arg2)
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cstrs1 cstrs2
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| (Type_record labels1, Type_record labels2) ->
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for_all2
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(fun (lbl1, mut1, ty1) (lbl2, mut2, ty2) ->
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lbl1 = lbl2 & mut1 = mut2 &
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Ctype.equal env true (ty1::decl1.type_params)
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(ty2::decl2.type_params))
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labels1 labels2
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| (_, _) -> false
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end &
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begin match (decl1.type_manifest, decl2.type_manifest) with
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(_, None) ->
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Ctype.equal env true decl1.type_params decl2.type_params
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| (Some ty1, Some ty2) ->
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Ctype.equal env true (ty1::decl1.type_params)
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(ty2::decl2.type_params)
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| (None, Some ty2) ->
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let ty1 =
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Btype.newgenty (Tconstr(Pident id, decl2.type_params, ref Mnil))
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in
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Ctype.equal env true decl1.type_params decl2.type_params
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&
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Ctype.equal env false [ty1] [ty2]
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end
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(* Inclusion between exception declarations *)
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let exception_declarations env ed1 ed2 =
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for_all2 (fun ty1 ty2 -> Ctype.equal env false [ty1] [ty2]) ed1 ed2
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(* Inclusion between class types *)
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let encode_val (mut, ty) rem =
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begin match mut with
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Asttypes.Mutable -> Predef.type_unit
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| Asttypes.Immutable -> Btype.newgenty Tvar
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end
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::ty::rem
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let meths meths1 meths2 =
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Meths.fold
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(fun nam t2 (ml1, ml2) ->
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(begin try
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Meths.find nam meths1 :: ml1
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with Not_found ->
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ml1
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end,
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t2 :: ml2))
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meths2 ([], [])
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let vars vars1 vars2 =
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Vars.fold
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(fun lab v2 (vl1, vl2) ->
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(begin try
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encode_val (Vars.find lab vars1) vl1
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with Not_found ->
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vl1
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end,
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encode_val v2 vl2))
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vars2 ([], [])
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