*************************************************************************
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.
*************************************************************************
Copyright (C) 1993, Digital Equipment Corporation
All rights reserved.
See the file COPYRIGHT for a full description.
<* PRAGMA FIELDS *>
INTERFACE M3AST_FE;
FE stands for Front-End as in Compiler Front-End. The AST is
augmented with attributes that pertain to the compilation process.
<* FIELDS OF M3AST_AS.Compilation_Unit
fe_uid: Unit_uid := NIL;
fe_status: Unit_status; *>
TYPE
Unit_uid <: REFANY; (* a unique identifier for a unit *)
Unit_status = SET OF Unit_state;
Unit_state = { (* flags indicating compilation state *)
Parsed, (* => tree present *)
ImportsResolved, (* IMPORT, EXPORT *)
SemChecked, (* static semantics *)
PErrors, IErrors, SErrors, (* parse, import, semantic errors *)
User1, User2, User3 (* hard-wired extensibility! *)
};
CONST
Unit_Errors =
Unit_status{Unit_state.PErrors, Unit_state.IErrors, Unit_state.SErrors};
Unit_AllPhases =
Unit_status{Unit_state.Parsed, Unit_state.ImportsResolved,
Unit_state.SemChecked};
TYPE
Unit_type = {Interface, Module, Interface_gen_def, Module_gen_def,
Interface_gen_ins, Module_gen_ins};
END M3AST_FE.