MODULE M3CImportS;
*************************************************************************
Copyright (C) Olivetti 1989
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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.
*************************************************************************
Copyright
IMPORT M3AST, M3AST_AS;
IMPORT M3AST_LX_F, M3AST_AS_F, M3AST_SM_F;
IMPORT SeqM3AST_AS_Used_interface_id, SeqM3AST_AS_IMPORTED;
IMPORT M3ASTNext;
IMPORT M3Context, M3CSrcPos; (* for Standard *)
PROCEDURE Set(an: M3AST.NODE) RAISES {}=
VAR
unit: M3AST_AS.UNIT_NORMAL;
m: M3AST_AS.Module;
used_intf_id: M3AST_AS.Used_interface_id;
iter: SeqM3AST_AS_Used_interface_id.Iter;
BEGIN
TYPECASE an OF
| M3AST_AS.Module(module) =>
m := module;
unit := module;
| M3AST_AS.Interface(interface) =>
m := NIL;
unit := interface;
ELSE
RETURN
END;
(* Everybody imports Standard - ugh not next time *)
AddStandard(unit);
IF m # NIL THEN
iter := SeqM3AST_AS_Used_interface_id.NewIter(m.sm_export_s);
WHILE SeqM3AST_AS_Used_interface_id.Next(iter, used_intf_id) DO
AddInterface(unit, used_intf_id);
END; (* while *)
END; (* if *)
AddImports(unit, unit.as_import_s);
END Set;
PROCEDURE AddInterface(
unit: M3AST_AS.UNIT_NORMAL;
used_intf_id: M3AST_AS.Used_interface_id)
RAISES {}=
VAR
id := used_intf_id.lx_symrep;
xused_intf_id: M3AST_AS.Used_interface_id;
iter := SeqM3AST_AS_Used_interface_id.NewIter(unit.sm_import_s);
BEGIN
(* Don't add errant ids *)
IF id = NIL THEN RETURN END;
(* sm_import_s is really a set, no duplicates, no self *)
WHILE SeqM3AST_AS_Used_interface_id.Next(iter, xused_intf_id) DO
IF id = xused_intf_id.lx_symrep THEN
RETURN
END; (* if *)
END; (* while *)
(* new; add it and everything it imports, but be graceful about
unresolved names. Do not add self *)
IF used_intf_id.sm_def # unit.as_id THEN
SeqM3AST_AS_Used_interface_id.AddRear(unit.sm_import_s, used_intf_id);
IF used_intf_id.sm_def # NIL THEN
VAR spec := NARROW(used_intf_id.sm_def, M3AST_AS.UNIT_ID).sm_spec;
BEGIN
IF spec # NIL THEN
TYPECASE spec OF
| M3AST_AS.UNIT_NORMAL(unit_normal) =>
AddImports(unit, unit_normal.as_import_s);
ELSE (* error elsewhere, (import of generic) *)
END;
END;
END;
END; (* if *)
END; (* if *)
END AddInterface;
PROCEDURE AddStandard(unit: M3AST_AS.UNIT_NORMAL) RAISES {}=
VAR
cu: M3AST_AS.Compilation_Unit;
std_id: M3AST_AS.Interface_id;
used_intf_id: M3AST_AS.Used_interface_id;
BEGIN
cu := M3Context.Standard();
IF unit = cu.as_root THEN RETURN END; (* this is Standard *)
std_id := cu.as_root.as_id;
used_intf_id := NEW(M3AST_AS.Used_interface_id).init();
used_intf_id.lx_symrep := std_id.lx_symrep;
used_intf_id.sm_def := std_id;
used_intf_id.lx_srcpos := M3CSrcPos.Null;
AddInterface(unit, used_intf_id);
END AddStandard;
PROCEDURE AddImports(
unit: M3AST_AS.UNIT_NORMAL;
seqImported: SeqM3AST_AS_IMPORTED.T)
RAISES {}=
VAR
iter : M3ASTNext.IterImportedId;
used_interface_id: M3AST_AS.Used_interface_id;
BEGIN
iter := M3ASTNext.NewIterImportedId(seqImported);
WHILE M3ASTNext.ImportedId(iter, used_interface_id) DO
(* The case "IMPORT I AS J; FROM J IMPORT ..." will cause
"used_interface_id" to bind to an "Interface_AS_id", which
doesnt provide any new information, so we ignore it here.
*)
TYPECASE used_interface_id.sm_def OF
| NULL =>
| M3AST_AS.Interface_AS_id =>
| M3AST_AS.Interface_id =>
AddInterface(unit, used_interface_id);
ELSE
END; (* typecase *)
END; (* while *)
END AddImports;
BEGIN
END M3CImportS.