Critical Mass Modula-3: m3tk/src/sem/M3CTypeSpecS.m3

m3tk/src/sem/M3CTypeSpecS.m3

MODULE M3CTypeSpecS;

************************************************************************* Copyright (C) Olivetti 1989 All Rights reserved Use and copy of this software and preparation of derivative works based upon this software are permitted to any person, provided this same copyright notice and the following Olivetti warranty disclaimer are included in any copy of the software or any modification thereof or derivative work therefrom made by any person. This software is made available AS IS and Olivetti disclaims all warranties with respect to this software, whether expressed or implied under any law, including all implied warranties of merchantibility and fitness for any purpose. In no event shall Olivetti be liable for any damages whatsoever resulting from loss of use, data or profits or otherwise arising out of or in connection with the use or performance of this software. *************************************************************************

IMPORT M3AST, M3AST_AS, M3Context;

IMPORT M3AST_AS_F, M3AST_SM_F, M3AST_TM_F;

IMPORT SeqM3AST_AS_TYPE_SPEC;

PROCEDURE Set(an: M3AST.NODE; unit: M3AST_AS.UNIT_WITH_BODY) RAISES {}=
  BEGIN
    IF NOT ISTYPE(an, M3AST_AS.TYPE_SPEC) THEN RETURN END;

    TYPECASE an OF
    | M3AST_AS.Ref_type(rt) => (* no untraced ref types *)
        IF rt.as_trace_mode # NIL THEN RETURN END;

    | M3AST_AS.Object_type, M3AST_AS.Opaque_type =>
        (* Ok *)

    ELSE
      RETURN
    END; (* case *)
    SeqM3AST_AS_TYPE_SPEC.AddRear(unit.sm_type_spec_s, an)
  END Set;

PROCEDURE TCTag(ts: M3AST_AS.TYPE_SPEC): INTEGER  RAISES {}=
  BEGIN
    VAR
      unit_id := TCUnit_id(ts);
      iter := SeqM3AST_AS_TYPE_SPEC.NewIter(
        NARROW(unit_id.sm_spec, M3AST_AS.UNIT_WITH_BODY).sm_type_spec_s);
      tag := 1;
      tts: M3AST_AS.TYPE_SPEC;
    BEGIN
      WHILE SeqM3AST_AS_TYPE_SPEC.Next(iter, tts) DO
        TYPECASE ts OF
        | M3AST_AS.RefAny_type, M3AST_AS.Root_type, M3AST_AS.Null_type =>
            IF TYPECODE(tts) = TYPECODE(ts) THEN RETURN tag END;
        ELSE
          IF ts = tts THEN RETURN tag END;
        END;
        INC(tag);
      END; (* while *)
    END;
    RETURN 0; (* bound to cause an error *)
  END TCTag;

PROCEDURE TCUnit_id(ts: M3AST_AS.TYPE_SPEC): M3AST_AS.UNIT_ID RAISES {}=
  BEGIN
    TYPECASE ts OF
    | M3AST_AS.RefAny_type, M3AST_AS.Root_type, M3AST_AS.Null_type =>
        RETURN M3Context.Standard().as_root.as_id;
    ELSE RETURN ts.tmp_unit_id.sm_spec.as_id;
    END;
  END TCUnit_id;

BEGIN
END M3CTypeSpecS.

interface M3AST is in: