m3tk/src/pl/M3LMain.m3

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 Copyright (C) 1993, Digital Equipment Corporation           
 All rights reserved.                                        
 See the file COPYRIGHT for a full description.              


MODULE M3LMain;

IMPORT RefList;
IMPORT M3AST_AS, M3CUnit, M3Context, M3CId;
IMPORT M3AST_AS_F, M3AST_SM_F;
IMPORT SeqM3AST_AS_Used_interface_id;

TYPE
  FindExporterClosure = M3Context.Closure OBJECT
    unitId: M3CId.T;
    seqCu: RefList.T := NIL;
  OVERRIDES
    callback := FindExporter;
  END;

PROCEDURE Module(c: M3Context.T): RefList.T=
  VAR
    cl: FindExporterClosure;
  BEGIN
    cl := NEW(FindExporterClosure, unitId := M3CId.Enter(Name));
    (* try to find modules that exports an interface called 'name'. *)
    <*FATAL ANY*> BEGIN
      M3Context.Apply(c, cl);
    END;
    RETURN cl.seqCu;
  END Module;

PRIVATE

PROCEDURE FindExporter(
    cl: FindExporterClosure;
    ut: M3CUnit.Type;
    <*UNUSED*> name: TEXT;
    cu: M3AST_AS.Compilation_Unit) RAISES {}=
  VAR
    iter: SeqM3AST_AS_Used_interface_id.Iter;
    used_intf_id: M3AST_AS.Used_interface_id;
  BEGIN
    cu := M3CUnit.ToGenIns(cu, ut);
    IF ut = M3CUnit.Type.Module THEN
      iter := SeqM3AST_AS_Used_interface_id.NewIter(
                NARROW(cu.as_root, M3AST_AS.Module).sm_export_s);
      WHILE SeqM3AST_AS_Used_interface_id.Next(iter, used_intf_id) DO
        IF used_intf_id.lx_symrep = cl.unitId THEN
          cl.seqCu := RefList.AppendD(cl.seqCu, RefList.List1(cu));
        END;
      END; (* while *)
    END; (* if *)
  END FindExporter;

BEGIN
END M3LMain.