MODULE************************************************************************* 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. *************************************************************************; M3CNameClash
IMPORT M3AST, M3AST_AS; IMPORT M3AST_AS_F, M3AST_SM_F, M3AST_TM_F; IMPORT M3ASTNext; IMPORT SeqM3AST_AS_Enum_id, SeqM3AST_AS_Fields, SeqM3AST_AS_Method, SeqM3AST_AS_Override; IMPORT M3CId, M3Error, M3Assert, M3CScope_priv, M3Context; TYPE Definitions = M3CScope_priv.Definitions; PROCEDURE************************************************************** PROCEDURE AssertIsStandard(old, new: M3AST_AS.DEF_ID) RAISES {}= VAR BEGIN IF NOT IsStandard(old) THEN M3Assert.Fail() END; IF NOT IsStandard(new) THEN M3Error.ReportWithId(new,IsStandard (d: M3AST_AS.DEF_ID): BOOLEAN RAISES {}= VAR unit: M3AST_AS.UNIT; BEGIN unit := d.tmp_unit_id.sm_spec; RETURN unit.sm_comp_unit = M3Context.Standard(); END IsStandard;
illegal redefinition of standard identifier \'%s\'
, new.lx_symrep);
END;
END AssertIsStandard;
******************************************
PROCEDUREEnter ( node: M3AST.NODE; defId: M3AST_AS.DEF_ID; VAR list: Definitions) : BOOLEAN RAISES {}= VAR id := defId.lx_symrep; old, new: Definitions; BEGIN IF id = NIL THEN RETURN TRUE END; old := id.defs; IF old # NIL THEN IF old.hook = node THEN (* must be due to previous call of 'Enter', while processing the current type *) RETURN FALSE; ELSE VAR d := old; BEGIN WHILE d.enclosing # NIL DO d := d.enclosing END; IF IsStandard(d.defId) AND NOT IsStandard(defId) THEN M3Error.ReportWithId(defId, "illegal redefinition of standard identifier \'%s\'", defId.lx_symrep); RETURN TRUE; END; END; END; (* if *) END; (* if *) new := NEW(Definitions, next := list, enclosing := old, id := id, defId := defId, scope := 0, hook := node); list := new; id.defs := new; RETURN TRUE; END Enter; PROCEDUREDisposeList (list: Definitions) RAISES {}= BEGIN WHILE list # NIL DO IF list # list.id.defs THEN M3Assert.Fail() END; list.id.defs := list.enclosing; list := list.next; END; (* while *) END DisposeList; PROCEDUREEnumeration (e: M3AST_AS.Enumeration_type) RAISES {}= VAR list: Definitions; iter: SeqM3AST_AS_Enum_id.Iter; enumId: M3AST_AS.Enum_id; BEGIN list := NIL; iter := SeqM3AST_AS_Enum_id.NewIter(e.as_id_s); WHILE SeqM3AST_AS_Enum_id.Next(iter, enumId) DO IF NOT Enter(e, enumId, list) THEN M3Error.ReportWithId(enumId, "name \'%s\' appears more than once in enumeration", enumId.lx_symrep); END; (* if *) END; (* while *) DisposeList(list); END Enumeration; PROCEDUREFields ( node: M3AST.NODE; f: SeqM3AST_AS_Fields.T) : Definitions RAISES {}= VAR list: Definitions; iter: M3ASTNext.IterField; fieldId: M3AST_AS.Field_id; BEGIN list := NIL; iter := M3ASTNext.NewIterField(f); WHILE M3ASTNext.Field(iter, fieldId) DO IF NOT Enter(node, fieldId, list) THEN M3Error.ReportWithId(fieldId, "field name \'%s\' clashes with existing field name", fieldId.lx_symrep); END; (* if *) END; (* while *) RETURN list; END Fields; PROCEDURERecord (r: M3AST_AS.Record_type) RAISES {}= VAR list: Definitions; BEGIN list := Fields(r, r.as_fields_s); DisposeList(list); END Record; PROCEDUREObject (o: M3AST_AS.Object_type) RAISES {}= VAR list: Definitions; iter: SeqM3AST_AS_Method.Iter; defId: M3AST_AS.DEF_ID; method: M3AST_AS.Method; BEGIN list := Fields(o, o.as_fields_s); iter := SeqM3AST_AS_Method.NewIter(o.as_method_s); WHILE SeqM3AST_AS_Method.Next(iter, method) DO defId := method.as_id; IF NOT Enter(o, defId, list) THEN M3Error.ReportWithId(defId, "method name \'%s\' clashes with existing field or method name", defId.lx_symrep); END; (* if *) END; (* while *) VAR iter := SeqM3AST_AS_Override.NewIter(o.as_override_s); override: M3AST_AS.Override; BEGIN WHILE SeqM3AST_AS_Override.Next(iter, override) DO defId := override.as_id; IF NOT Enter(o, defId, list) THEN M3Error.ReportWithId(defId, "override method name \'%s\' clashes with existing field or method name", defId.lx_symrep); END; (* if *) END; (* while *) END; DisposeList(list); END Object; PROCEDUREProcedure (p: M3AST_AS.Procedure_type) RAISES {}= VAR list: Definitions; iter: M3ASTNext.IterFormal; formal: M3AST_AS.Formal_param; formalId: M3AST_AS.FORMAL_ID; BEGIN TYPECASE p.sm_def_id OF | NULL => (* Procedure type - needs checking *) | M3AST_AS.Proc_id => (* part of a 'Proc_decl'; already checked by 'M3CScope' code *) RETURN; ELSE (* Method procedure type - needs checking *) END; list := NIL; iter := M3ASTNext.NewIterFormal(p.as_formal_param_s); WHILE M3ASTNext.Formal(iter, formal, formalId) DO IF NOT Enter(p, formalId, list) THEN M3Error.ReportWithId(formalId, "parameter name \'%s\' clashes with existing parameter name", formalId.lx_symrep); END; (* if *) END; (* while *) DisposeList(list); END Procedure; BEGIN END M3CNameClash.