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716 lines
24 KiB
ObjectPascal
716 lines
24 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2000 by Florian Klaempfl
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Does parsing types for Free Pascal
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit ptype;
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{$i defines.inc}
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interface
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uses
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globtype,symtype;
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const
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{ forward types should only be possible inside a TYPE statement }
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typecanbeforward : boolean = false;
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var
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{ hack, which allows to use the current parsed }
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{ object type as function argument type }
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testcurobject : byte;
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curobjectname : stringid;
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{ reads a string, file type or a type id and returns a name and }
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{ tdef }
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procedure single_type(var tt:ttype;var s : string;isforwarddef:boolean);
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procedure read_type(var tt:ttype;const name : stringid);
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{ reads a type definition }
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{ to a appropriating tdef, s gets the name of }
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{ the type to allow name mangling }
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procedure id_type(var tt : ttype;var s : string;isforwarddef:boolean);
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implementation
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uses
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{ common }
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cutils,cpuinfo,
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{ global }
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globals,tokens,verbose,
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systems,
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{ symtable }
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symconst,symbase,symdef,symsym,symtable,types,
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{ pass 1 }
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node,pass_1,
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nmat,nadd,ncal,nset,ncnv,ninl,ncon,nld,nflw,
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{ parser }
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scanner,
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pbase,pexpr,pdecsub,pdecvar,pdecobj;
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procedure id_type(var tt : ttype;var s : string;isforwarddef:boolean);
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{ reads a type definition }
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{ to a appropriating tdef, s gets the name of }
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{ the type to allow name mangling }
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var
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is_unit_specific : boolean;
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pos : tfileposinfo;
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srsym : tsym;
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srsymtable : tsymtable;
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begin
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s:=pattern;
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pos:=akttokenpos;
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{ classes can be used also in classes }
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if (curobjectname=pattern) and is_class_or_interface(aktobjectdef) then
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begin
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tt.setdef(aktobjectdef);
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consume(_ID);
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exit;
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end;
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{ objects can be parameters }
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if (testcurobject=2) and (curobjectname=pattern) then
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begin
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tt.setdef(aktobjectdef);
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consume(_ID);
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exit;
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end;
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{ try to load the symbol to see if it's a unitsym }
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is_unit_specific:=false;
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searchsym(s,srsym,srsymtable);
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consume(_ID);
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if assigned(srsym) and
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(srsym.typ=unitsym) then
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begin
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is_unit_specific:=true;
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consume(_POINT);
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if srsym.owner.unitid=0 then
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begin
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srsym:=searchsymonlyin(tunitsym(srsym).unitsymtable,pattern);
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pos:=akttokenpos;
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s:=pattern;
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end
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else
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srsym:=nil;
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consume(_ID);
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end;
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{ are we parsing a possible forward def ? }
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if isforwarddef and
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not(is_unit_specific) then
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begin
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tt.setdef(tforwarddef.create(s,pos));
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exit;
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end;
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{ unknown sym ? }
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if not assigned(srsym) then
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begin
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Message1(sym_e_id_not_found,s);
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tt:=generrortype;
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exit;
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end;
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{ type sym ? }
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if (srsym.typ<>typesym) then
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begin
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Message(type_e_type_id_expected);
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tt:=generrortype;
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exit;
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end;
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{ Types are first defined with an error def before assigning
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the real type so check if it's an errordef. if so then
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give an error }
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if (ttypesym(srsym).restype.def.deftype=errordef) then
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begin
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Message(sym_e_error_in_type_def);
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tt:=generrortype;
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exit;
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end;
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{ Only use the definitions for system/current unit, becuase
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they can be refered from the parameters and symbols are not
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loaded at that time. A symbol reference to an other unit
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is still possible, because it's already loaded (PFV)
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can't use in [] here, becuase unitid can be > 255 }
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if (ttypesym(srsym).owner.unitid=0) or
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(ttypesym(srsym).owner.unitid=1) then
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tt.setdef(ttypesym(srsym).restype.def)
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else
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tt.setsym(srsym);
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end;
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procedure single_type(var tt:ttype;var s : string;isforwarddef:boolean);
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{ reads a string, file type or a type id and returns a name and }
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{ tdef }
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var
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hs : string;
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t2 : ttype;
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begin
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case token of
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_STRING:
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begin
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string_dec(tt);
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s:='STRING';
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end;
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_FILE:
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begin
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consume(_FILE);
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if token=_OF then
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begin
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consume(_OF);
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single_type(t2,hs,false);
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tt.setdef(tfiledef.createtyped(t2));
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s:='FILE$OF$'+hs;
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end
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else
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begin
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tt:=cfiletype;
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s:='FILE';
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end;
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end;
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else
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begin
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id_type(tt,s,isforwarddef);
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end;
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end;
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end;
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{ reads a record declaration }
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function record_dec : tdef;
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var
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symtable : tsymtable;
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storetypecanbeforward : boolean;
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begin
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{ create recdef }
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symtable:=trecordsymtable.create;
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record_dec:=trecorddef.create(symtable);
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{ update symtable stack }
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symtable.next:=symtablestack;
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symtablestack:=symtable;
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{ parse record }
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consume(_RECORD);
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storetypecanbeforward:=typecanbeforward;
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{ for tp mode don't allow forward types }
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if m_tp in aktmodeswitches then
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typecanbeforward:=false;
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read_var_decs(true,false,false);
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consume(_END);
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typecanbeforward:=storetypecanbeforward;
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{ may be scale record size to a size of n*4 ? }
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symtablestack.datasize:=align(symtablestack.datasize,symtablestack.dataalignment);
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{ restore symtable stack }
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symtablestack:=symtable.next;
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end;
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{ reads a type definition and returns a pointer to it }
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procedure read_type(var tt : ttype;const name : stringid);
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var
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pt : tnode;
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tt2 : ttype;
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aktenumdef : tenumdef;
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ap : tarraydef;
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s : stringid;
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l,v : TConstExprInt;
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oldaktpackrecords : longint;
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hs : string;
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defpos,storepos : tfileposinfo;
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procedure expr_type;
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var
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pt1,pt2 : tnode;
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begin
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{ use of current parsed object ? }
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if (token=_ID) and (testcurobject=2) and (curobjectname=pattern) then
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begin
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consume(_ID);
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tt.setdef(aktobjectdef);
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exit;
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end;
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{ classes can be used also in classes }
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if (curobjectname=pattern) and is_class_or_interface(aktobjectdef) then
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begin
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tt.setdef(aktobjectdef);
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consume(_ID);
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exit;
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end;
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{ we can't accept a equal in type }
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pt1:=comp_expr(not(ignore_equal));
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if (token=_POINTPOINT) then
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begin
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consume(_POINTPOINT);
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{ get high value of range }
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pt2:=comp_expr(not(ignore_equal));
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{ make both the same type }
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inserttypeconv(pt1,pt2.resulttype);
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{ both must be evaluated to constants now }
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if (pt1.nodetype=ordconstn) and
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(pt2.nodetype=ordconstn) then
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begin
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{ Check bounds }
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if tordconstnode(pt2).value<tordconstnode(pt1).value then
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Message(cg_e_upper_lower_than_lower)
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else
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begin
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{ All checks passed, create the new def }
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case pt1.resulttype.def.deftype of
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enumdef :
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tt.setdef(tenumdef.create_subrange(tenumdef(pt1.resulttype.def),tordconstnode(pt1).value,tordconstnode(pt2).value));
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orddef :
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begin
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if is_char(pt1.resulttype.def) then
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tt.setdef(torddef.create(uchar,tordconstnode(pt1).value,tordconstnode(pt2).value))
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else
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if is_boolean(pt1.resulttype.def) then
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tt.setdef(torddef.create(bool8bit,tordconstnode(pt1).value,tordconstnode(pt2).value))
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else
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tt.setdef(torddef.create(uauto,tordconstnode(pt1).value,tordconstnode(pt2).value));
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end;
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end;
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end;
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end
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else
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Message(sym_e_error_in_type_def);
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pt2.free;
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end
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else
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begin
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{ a simple type renaming }
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if (pt1.nodetype=typen) then
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tt:=ttypenode(pt1).resulttype
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else
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Message(sym_e_error_in_type_def);
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end;
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pt1.free;
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end;
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procedure array_dec;
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var
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lowval,
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highval : longint;
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arraytype : ttype;
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ht : ttype;
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procedure setdefdecl(const t:ttype);
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begin
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case t.def.deftype of
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enumdef :
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begin
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lowval:=tenumdef(t.def).min;
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highval:=tenumdef(t.def).max;
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arraytype:=t;
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end;
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orddef :
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begin
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if torddef(t.def).typ in [uchar,
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u8bit,u16bit,
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s8bit,s16bit,s32bit,
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bool8bit,bool16bit,bool32bit,
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uwidechar] then
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begin
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lowval:=torddef(t.def).low;
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highval:=torddef(t.def).high;
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arraytype:=t;
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end
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else
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Message1(parser_e_type_cant_be_used_in_array_index,t.def.gettypename);
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end;
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else
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Message(sym_e_error_in_type_def);
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end;
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end;
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begin
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consume(_ARRAY);
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{ open array? }
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if token=_LECKKLAMMER then
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begin
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consume(_LECKKLAMMER);
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{ defaults }
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arraytype:=generrortype;
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lowval:=longint($80000000);
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highval:=$7fffffff;
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tt.reset;
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repeat
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{ read the expression and check it, check apart if the
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declaration is an enum declaration because that needs to
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be parsed by readtype (PFV) }
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if token=_LKLAMMER then
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begin
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read_type(ht,'');
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setdefdecl(ht);
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end
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else
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begin
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pt:=expr;
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if pt.nodetype=typen then
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setdefdecl(pt.resulttype)
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else
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begin
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if (pt.nodetype=rangen) then
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begin
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if (trangenode(pt).left.nodetype=ordconstn) and
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(trangenode(pt).right.nodetype=ordconstn) then
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begin
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lowval:=tordconstnode(trangenode(pt).left).value;
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highval:=tordconstnode(trangenode(pt).right).value;
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if highval<lowval then
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begin
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Message(parser_e_array_lower_less_than_upper_bound);
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highval:=lowval;
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end;
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arraytype:=trangenode(pt).right.resulttype;
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end
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else
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Message(type_e_cant_eval_constant_expr);
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end
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else
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Message(sym_e_error_in_type_def)
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end;
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pt.free;
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end;
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{ create arraydef }
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if not assigned(tt.def) then
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begin
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ap:=tarraydef.create(lowval,highval,arraytype);
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tt.setdef(ap);
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end
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else
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begin
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ap.elementtype.setdef(tarraydef.create(lowval,highval,arraytype));
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ap:=tarraydef(ap.elementtype.def);
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end;
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if token=_COMMA then
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consume(_COMMA)
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else
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break;
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until false;
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consume(_RECKKLAMMER);
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end
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else
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begin
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ap:=tarraydef.create(0,-1,s32bittype);
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ap.IsDynamicArray:=true;
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tt.setdef(ap);
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end;
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consume(_OF);
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read_type(tt2,'');
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{ if no error, set element type }
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if assigned(ap) then
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ap.elementtype:=tt2;
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end;
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var
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p : tnode;
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enumdupmsg : boolean;
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begin
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tt.reset;
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case token of
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_STRING,_FILE:
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begin
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single_type(tt,hs,false);
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end;
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_LKLAMMER:
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begin
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consume(_LKLAMMER);
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{ allow negativ value_str }
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l:=-1;
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enumdupmsg:=false;
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aktenumdef:=tenumdef.create;
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repeat
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s:=orgpattern;
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defpos:=akttokenpos;
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consume(_ID);
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{ only allow assigning of specific numbers under fpc mode }
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if (m_fpc in aktmodeswitches) and
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(token=_ASSIGNMENT) then
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begin
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consume(_ASSIGNMENT);
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v:=get_intconst;
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{ please leave that a note, allows type save }
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{ declarations in the win32 units ! }
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if (v<=l) and (not enumdupmsg) then
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begin
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Message(parser_n_duplicate_enum);
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enumdupmsg:=true;
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end;
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l:=v;
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end
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else if (m_delphi in aktmodeswitches) and
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(token=_EQUAL) then
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begin
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consume(_EQUAL);
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p:=comp_expr(true);
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if (p.nodetype=ordconstn) then
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begin
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{ we expect an integer or an enum of the
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same type }
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if is_integer(p.resulttype.def) or
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is_equal(p.resulttype.def,aktenumdef) then
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l:=tordconstnode(p).value
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else
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Message2(type_e_incompatible_types,p.resulttype.def.typename,s32bittype.def.typename);
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end
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else
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Message(cg_e_illegal_expression);
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p.free;
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end
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else
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inc(l);
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storepos:=akttokenpos;
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akttokenpos:=defpos;
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constsymtable.insert(tenumsym.create(s,aktenumdef,l));
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akttokenpos:=storepos;
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until not try_to_consume(_COMMA);
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tt.setdef(aktenumdef);
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consume(_RKLAMMER);
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end;
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_ARRAY:
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begin
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array_dec;
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end;
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_SET:
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begin
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consume(_SET);
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consume(_OF);
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read_type(tt2,'');
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if assigned(tt2.def) then
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begin
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case tt2.def.deftype of
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{ don't forget that min can be negativ PM }
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enumdef :
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if tenumdef(tt2.def).min>=0 then
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tt.setdef(tsetdef.create(tt2,tenumdef(tt2.def).max))
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else
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Message(sym_e_ill_type_decl_set);
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orddef :
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begin
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case torddef(tt2.def).typ of
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uchar :
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tt.setdef(tsetdef.create(tt2,255));
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u8bit,u16bit,u32bit,
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s8bit,s16bit,s32bit :
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begin
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if (torddef(tt2.def).low>=0) then
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tt.setdef(tsetdef.create(tt2,torddef(tt2.def).high))
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else
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Message(sym_e_ill_type_decl_set);
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end;
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else
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Message(sym_e_ill_type_decl_set);
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end;
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end;
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else
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Message(sym_e_ill_type_decl_set);
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end;
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end
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else
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tt:=generrortype;
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end;
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_CARET:
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begin
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consume(_CARET);
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single_type(tt2,hs,typecanbeforward);
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tt.setdef(tpointerdef.create(tt2));
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end;
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_RECORD:
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begin
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tt.setdef(record_dec);
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end;
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_PACKED:
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begin
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consume(_PACKED);
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if token=_ARRAY then
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array_dec
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else
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begin
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oldaktpackrecords:=aktalignment.recordalignmax;
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aktalignment.recordalignmax:=1;
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if token in [_CLASS,_OBJECT] then
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tt.setdef(object_dec(name,nil))
|
|
else
|
|
tt.setdef(record_dec);
|
|
aktalignment.recordalignmax:=oldaktpackrecords;
|
|
end;
|
|
end;
|
|
_CLASS,
|
|
_CPPCLASS,
|
|
_INTERFACE,
|
|
_OBJECT:
|
|
begin
|
|
tt.setdef(object_dec(name,nil));
|
|
end;
|
|
_PROCEDURE:
|
|
begin
|
|
consume(_PROCEDURE);
|
|
tt.setdef(tprocvardef.create);
|
|
if token=_LKLAMMER then
|
|
parameter_dec(tprocvardef(tt.def));
|
|
if token=_OF then
|
|
begin
|
|
consume(_OF);
|
|
consume(_OBJECT);
|
|
include(tprocvardef(tt.def).procoptions,po_methodpointer);
|
|
end;
|
|
end;
|
|
_FUNCTION:
|
|
begin
|
|
consume(_FUNCTION);
|
|
tt.def:=tprocvardef.create;
|
|
if token=_LKLAMMER then
|
|
parameter_dec(tprocvardef(tt.def));
|
|
consume(_COLON);
|
|
single_type(tprocvardef(tt.def).rettype,hs,false);
|
|
if token=_OF then
|
|
begin
|
|
consume(_OF);
|
|
consume(_OBJECT);
|
|
include(tprocvardef(tt.def).procoptions,po_methodpointer);
|
|
end;
|
|
end;
|
|
else
|
|
expr_type;
|
|
end;
|
|
if tt.def=nil then
|
|
tt:=generrortype;
|
|
end;
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.28 2001-07-09 21:15:41 peter
|
|
* Length made internal
|
|
* Add array support for Length
|
|
|
|
Revision 1.27 2001/07/01 20:16:16 peter
|
|
* alignmentinfo record added
|
|
* -Oa argument supports more alignment settings that can be specified
|
|
per type: PROC,LOOP,VARMIN,VARMAX,CONSTMIN,CONSTMAX,RECORDMIN
|
|
RECORDMAX,LOCALMIN,LOCALMAX. It is possible to set the mimimum
|
|
required alignment and the maximum usefull alignment. The final
|
|
alignment will be choosen per variable size dependent on these
|
|
settings
|
|
|
|
Revision 1.26 2001/06/04 18:06:38 peter
|
|
* fix for enum with assignment
|
|
|
|
Revision 1.25 2001/06/04 11:51:59 peter
|
|
* enum type declarations assignments can also be of the same enum
|
|
type
|
|
|
|
Revision 1.24 2001/06/03 20:16:19 peter
|
|
* allow int64 in range declaration for new types
|
|
|
|
Revision 1.23 2001/04/13 01:22:13 peter
|
|
* symtable change to classes
|
|
* range check generation and errors fixed, make cycle DEBUG=1 works
|
|
* memory leaks fixed
|
|
|
|
Revision 1.22 2001/04/04 22:43:53 peter
|
|
* remove unnecessary calls to firstpass
|
|
|
|
Revision 1.21 2001/04/02 21:20:34 peter
|
|
* resulttype rewrite
|
|
|
|
Revision 1.20 2001/03/22 22:35:42 florian
|
|
+ support for type a = (a=1); in Delphi mode added
|
|
+ procedure p(); in Delphi mode supported
|
|
+ on isn't keyword anymore, it can be used as
|
|
id etc. now
|
|
|
|
Revision 1.19 2001/03/12 12:49:01 michael
|
|
+ Patches from peter
|
|
|
|
Revision 1.18 2001/03/11 22:58:50 peter
|
|
* getsym redesign, removed the globals srsym,srsymtable
|
|
|
|
Revision 1.17 2000/12/07 17:19:43 jonas
|
|
* new constant handling: from now on, hex constants >$7fffffff are
|
|
parsed as unsigned constants (otherwise, $80000000 got sign extended
|
|
and became $ffffffff80000000), all constants in the longint range
|
|
become longints, all constants >$7fffffff and <=cardinal($ffffffff)
|
|
are cardinals and the rest are int64's.
|
|
* added lots of longint typecast to prevent range check errors in the
|
|
compiler and rtl
|
|
* type casts of symbolic ordinal constants are now preserved
|
|
* fixed bug where the original resulttype.def wasn't restored correctly
|
|
after doing a 64bit rangecheck
|
|
|
|
Revision 1.16 2000/11/29 00:30:38 florian
|
|
* unused units removed from uses clause
|
|
* some changes for widestrings
|
|
|
|
Revision 1.15 2000/11/14 23:43:38 florian
|
|
* fixed 1238
|
|
|
|
Revision 1.14 2000/11/04 14:25:21 florian
|
|
+ merged Attila's changes for interfaces, not tested yet
|
|
|
|
Revision 1.13 2000/10/31 22:02:51 peter
|
|
* symtable splitted, no real code changes
|
|
|
|
Revision 1.12 2000/10/26 21:54:03 peter
|
|
* fixed crash with error in child definition (merged)
|
|
|
|
Revision 1.11 2000/10/21 18:16:12 florian
|
|
* a lot of changes:
|
|
- basic dyn. array support
|
|
- basic C++ support
|
|
- some work for interfaces done
|
|
....
|
|
|
|
Revision 1.10 2000/10/14 10:14:52 peter
|
|
* moehrendorf oct 2000 rewrite
|
|
|
|
Revision 1.9 2000/09/24 15:06:25 peter
|
|
* use defines.inc
|
|
|
|
Revision 1.8 2000/08/27 20:19:39 peter
|
|
* store strings with case in ppu, when an internal symbol is created
|
|
a '$' is prefixed so it's not automatic uppercased
|
|
|
|
Revision 1.7 2000/08/27 16:11:52 peter
|
|
* moved some util functions from globals,cobjects to cutils
|
|
* splitted files into finput,fmodule
|
|
|
|
Revision 1.6 2000/08/16 18:33:54 peter
|
|
* splitted namedobjectitem.next into indexnext and listnext so it
|
|
can be used in both lists
|
|
* don't allow "word = word" type definitions (merged)
|
|
|
|
Revision 1.5 2000/08/06 14:17:15 peter
|
|
* overload fixes (merged)
|
|
|
|
Revision 1.4 2000/07/30 17:04:43 peter
|
|
* merged fixes
|
|
|
|
Revision 1.3 2000/07/13 12:08:27 michael
|
|
+ patched to 1.1.0 with former 1.09patch from peter
|
|
|
|
Revision 1.2 2000/07/13 11:32:47 michael
|
|
+ removed logs
|
|
|
|
}
|