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648 lines
26 KiB
ObjectPascal
648 lines
26 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2000 by Florian Klaempfl
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Parses variable declarations. Used for var statement and record
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definitions
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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 pdecvar;
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{$i defines.inc}
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interface
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procedure read_var_decs(is_record,is_object,is_threadvar:boolean);
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implementation
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uses
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{ common }
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cutils,
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{ global }
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globtype,globals,tokens,verbose,
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systems,
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{ symtable }
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symconst,symbase,symtype,symdef,symsym,symtable,types,fmodule,
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{ pass 1 }
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node,
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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,ptype,ptconst,pdecsub,
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{ link }
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import;
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const
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variantrecordlevel : longint = 0;
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procedure read_var_decs(is_record,is_object,is_threadvar:boolean);
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{ reads the filed of a record into a }
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{ symtablestack, if record=false }
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{ variants are forbidden, so this procedure }
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{ can be used to read object fields }
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{ if absolute is true, ABSOLUTE and file }
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{ types are allowed }
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{ => the procedure is also used to read }
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{ a sequence of variable declaration }
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procedure insert_syms(st : tsymtable;sc : tidstringlist;tt : ttype;is_threadvar : boolean);
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{ inserts the symbols of sc in st with def as definition or sym as ttypesym, sc is disposed }
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var
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s : string;
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filepos : tfileposinfo;
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ss : tvarsym;
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begin
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filepos:=akttokenpos;
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while not sc.empty do
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begin
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s:=sc.get(akttokenpos);
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ss:=tvarsym.Create(s,tt);
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if is_threadvar then
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include(ss.varoptions,vo_is_thread_var);
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st.insert(ss);
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{ static data fields are inserted in the globalsymtable }
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if (st.symtabletype=objectsymtable) and
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(sp_static in current_object_option) then
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begin
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s:='$'+lower(st.name^)+'_'+upper(s);
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st.defowner.owner.insert(tvarsym.create(s,tt));
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end;
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end;
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{$ifdef fixLeaksOnError}
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if strContStack.pop <> sc then
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writeln('problem with strContStack in pdecl (2)');
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{$endif fixLeaksOnError}
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sc.free;
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akttokenpos:=filepos;
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end;
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var
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sc : tidstringList;
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s : stringid;
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old_block_type : tblock_type;
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declarepos,storetokenpos : tfileposinfo;
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oldsymtablestack : tsymtable;
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symdone : boolean;
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{ to handle absolute }
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abssym : tabsolutesym;
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{ c var }
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newtype : ttypesym;
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is_dll,
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is_gpc_name,is_cdecl,
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extern_aktvarsym,export_aktvarsym : boolean;
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old_current_object_option : tsymoptions;
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dll_name,
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C_name : string;
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tt,casetype : ttype;
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{ Delphi initialized vars }
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tconstsym : ttypedconstsym;
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{ maxsize contains the max. size of a variant }
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{ startvarrec contains the start of the variant part of a record }
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usedalign,
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maxsize,minalignment,maxalignment,startvarrecalign,startvarrecsize : longint;
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pt : tnode;
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srsym : tsym;
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srsymtable : tsymtable;
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unionsymtable : tsymtable;
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offset : longint;
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uniondef : trecorddef;
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unionsym : tvarsym;
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uniontype : ttype;
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dummysymoptions : tsymoptions;
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begin
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old_current_object_option:=current_object_option;
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{ all variables are public if not in a object declaration }
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if not is_object then
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current_object_option:=[sp_public];
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old_block_type:=block_type;
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block_type:=bt_type;
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is_gpc_name:=false;
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{ Force an expected ID error message }
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if not (token in [_ID,_CASE,_END]) then
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consume(_ID);
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{ read vars }
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while (token=_ID) and
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not(is_object and (idtoken in [_PUBLIC,_PRIVATE,_PUBLISHED,_PROTECTED])) do
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begin
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C_name:=orgpattern;
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sc:=consume_idlist;
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{$ifdef fixLeaksOnError}
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strContStack.push(sc);
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{$endif fixLeaksOnError}
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consume(_COLON);
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if (m_gpc in aktmodeswitches) and
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not(is_record or is_object or is_threadvar) and
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(token=_ID) and (orgpattern='__asmname__') then
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begin
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consume(_ID);
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C_name:=get_stringconst;
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Is_gpc_name:=true;
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end;
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{ this is needed for Delphi mode at least
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but should be OK for all modes !! (PM) }
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ignore_equal:=true;
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if is_record then
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begin
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{ for records, don't search the recordsymtable for
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the symbols of the types }
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oldsymtablestack:=symtablestack;
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symtablestack:=symtablestack.next;
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read_type(tt,'');
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symtablestack:=oldsymtablestack;
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end
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else
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read_type(tt,'');
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{ types that use init/final are not allowed in variant parts, but
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classes are allowed }
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if (variantrecordlevel>0) and
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(tt.def.needs_inittable and not is_class(tt.def)) then
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Message(parser_e_cant_use_inittable_here);
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ignore_equal:=false;
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symdone:=false;
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if is_gpc_name then
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begin
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storetokenpos:=akttokenpos;
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s:=sc.get(akttokenpos);
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if not sc.empty then
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Message(parser_e_absolute_only_one_var);
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{$ifdef fixLeaksOnError}
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if strContStack.pop <> sc then
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writeln('problem with strContStack in pdecl (3)');
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{$endif fixLeaksOnError}
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sc.free;
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aktvarsym:=tvarsym.create_C(s,target_info.Cprefix+C_name,tt);
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include(aktvarsym.varoptions,vo_is_external);
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symtablestack.insert(aktvarsym);
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akttokenpos:=storetokenpos;
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symdone:=true;
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end;
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{ check for absolute }
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if not symdone and
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(idtoken=_ABSOLUTE) and not(is_record or is_object or is_threadvar) then
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begin
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consume(_ABSOLUTE);
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{ only allowed for one var }
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s:=sc.get(declarepos);
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if not sc.empty then
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Message(parser_e_absolute_only_one_var);
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{$ifdef fixLeaksOnError}
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if strContStack.pop <> sc then
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writeln('problem with strContStack in pdecl (4)');
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{$endif fixLeaksOnError}
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sc.free;
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{ parse the rest }
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pt:=expr;
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if (pt.nodetype=stringconstn) or (is_constcharnode(pt)) then
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begin
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storetokenpos:=akttokenpos;
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akttokenpos:=declarepos;
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abssym:=tabsolutesym.create(s,tt);
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if pt.nodetype=stringconstn then
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s:=strpas(tstringconstnode(pt).value_str)
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else
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s:=chr(tordconstnode(pt).value);
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consume(token);
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abssym.abstyp:=toasm;
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abssym.asmname:=stringdup(s);
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symtablestack.insert(abssym);
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akttokenpos:=storetokenpos;
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symdone:=true;
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end;
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if not symdone then
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begin
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{ variable }
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if (pt.nodetype=loadn) then
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begin
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{ we should check the result type of srsym }
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if not (tloadnode(pt).symtableentry.typ in [varsym,typedconstsym,funcretsym]) then
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Message(parser_e_absolute_only_to_var_or_const);
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storetokenpos:=akttokenpos;
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akttokenpos:=declarepos;
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abssym:=tabsolutesym.create(s,tt);
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abssym.abstyp:=tovar;
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abssym.ref:=tstoredsym(tloadnode(pt).symtableentry);
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symtablestack.insert(abssym);
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akttokenpos:=storetokenpos;
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symdone:=true;
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end
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{ funcret }
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else if (pt.nodetype=funcretn) then
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begin
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storetokenpos:=akttokenpos;
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akttokenpos:=declarepos;
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abssym:=tabsolutesym.create(s,tt);
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abssym.abstyp:=tovar;
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abssym.ref:=tstoredsym(tfuncretnode(pt).funcretsym);
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symtablestack.insert(abssym);
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akttokenpos:=storetokenpos;
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symdone:=true;
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end;
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{ address }
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if (not symdone) and
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((target_info.target=target_i386_go32v2) or
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(m_objfpc in aktmodeswitches) or
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(m_delphi in aktmodeswitches)) then
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begin
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if is_constintnode(pt) then
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begin
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storetokenpos:=akttokenpos;
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akttokenpos:=declarepos;
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abssym:=tabsolutesym.create(s,tt);
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abssym.abstyp:=toaddr;
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abssym.absseg:=false;
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abssym.address:=tordconstnode(pt).value;
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if (token=_COLON) and
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(target_info.target=target_i386_go32v2) then
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begin
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consume(token);
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pt:=expr;
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if is_constintnode(pt) then
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begin
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abssym.address:=abssym.address shl 4+tordconstnode(pt).value;
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abssym.absseg:=true;
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end
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else
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Message(parser_e_absolute_only_to_var_or_const);
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end;
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symtablestack.insert(abssym);
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akttokenpos:=storetokenpos;
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end
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else
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Message(parser_e_absolute_only_to_var_or_const);
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end;
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end
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else
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Message(parser_e_absolute_only_to_var_or_const);
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symdone:=true;
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end;
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{ Handling of Delphi typed const = initialized vars ! }
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{ When should this be rejected ?
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- in parasymtable
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- in record or object
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- ... (PM) }
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if (m_delphi in aktmodeswitches) and (token=_EQUAL) and
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not (symtablestack.symtabletype in [parasymtable]) and
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not is_record and not is_object then
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begin
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storetokenpos:=akttokenpos;
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s:=sc.get(akttokenpos);
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if not sc.empty then
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Message(parser_e_initialized_only_one_var);
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tconstsym:=ttypedconstsym.createtype(s,tt,false);
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symtablestack.insert(tconstsym);
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akttokenpos:=storetokenpos;
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consume(_EQUAL);
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readtypedconst(tt,tconstsym,false);
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symdone:=true;
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end;
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{ hint directive }
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{$warning hintdirective not stored in syms}
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dummysymoptions:=[];
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try_consume_hintdirective(dummysymoptions);
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{ for a record there doesn't need to be a ; before the END or ) }
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if not((is_record or is_object) and (token in [_END,_RKLAMMER])) then
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consume(_SEMICOLON);
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{ procvar handling }
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if (tt.def.deftype=procvardef) and (tt.def.typesym=nil) then
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begin
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newtype:=ttypesym.create('unnamed',tt);
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parse_var_proc_directives(tsym(newtype));
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newtype.restype.def:=nil;
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tt.def.typesym:=nil;
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newtype.free;
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end;
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{ Check for variable directives }
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if not symdone and (token=_ID) then
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begin
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{ Check for C Variable declarations }
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if (m_cvar_support in aktmodeswitches) and
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not(is_record or is_object or is_threadvar) and
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(idtoken in [_EXPORT,_EXTERNAL,_PUBLIC,_CVAR]) then
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begin
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{ only allowed for one var }
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s:=sc.get(declarepos);
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if not sc.empty then
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Message(parser_e_absolute_only_one_var);
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{$ifdef fixLeaksOnError}
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if strContStack.pop <> sc then
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writeln('problem with strContStack in pdecl (5)');
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{$endif fixLeaksOnError}
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sc.free;
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{ defaults }
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is_dll:=false;
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is_cdecl:=false;
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extern_aktvarsym:=false;
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export_aktvarsym:=false;
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{ cdecl }
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if idtoken=_CVAR then
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begin
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consume(_CVAR);
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consume(_SEMICOLON);
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is_cdecl:=true;
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C_name:=target_info.Cprefix+C_name;
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end;
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{ external }
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if idtoken=_EXTERNAL then
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begin
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consume(_EXTERNAL);
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extern_aktvarsym:=true;
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end;
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{ export }
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if idtoken in [_EXPORT,_PUBLIC] then
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begin
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consume(_ID);
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if extern_aktvarsym or
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(symtablestack.symtabletype in [parasymtable,localsymtable]) then
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Message(parser_e_not_external_and_export)
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else
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export_aktvarsym:=true;
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end;
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{ external and export need a name after when no cdecl is used }
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if not is_cdecl then
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begin
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{ dll name ? }
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if (extern_aktvarsym) and (idtoken<>_NAME) then
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begin
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is_dll:=true;
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dll_name:=get_stringconst;
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end;
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consume(_NAME);
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C_name:=get_stringconst;
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end;
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{ consume the ; when export or external is used }
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if extern_aktvarsym or export_aktvarsym then
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consume(_SEMICOLON);
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{ insert in the symtable }
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storetokenpos:=akttokenpos;
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akttokenpos:=declarepos;
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if is_dll then
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aktvarsym:=tvarsym.create_dll(s,tt)
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else
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aktvarsym:=tvarsym.create_C(s,C_name,tt);
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{ set some vars options }
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if export_aktvarsym then
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begin
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inc(aktvarsym.refs);
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include(aktvarsym.varoptions,vo_is_exported);
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end;
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if extern_aktvarsym then
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include(aktvarsym.varoptions,vo_is_external);
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{ insert in the stack/datasegment }
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symtablestack.insert(aktvarsym);
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akttokenpos:=storetokenpos;
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{ now we can insert it in the import lib if its a dll, or
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add it to the externals }
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if extern_aktvarsym then
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begin
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if is_dll then
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begin
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if not(current_module.uses_imports) then
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begin
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current_module.uses_imports:=true;
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importlib.preparelib(current_module.modulename^);
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end;
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importlib.importvariable(aktvarsym.mangledname,dll_name,C_name)
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end
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else
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if target_info.DllScanSupported then
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current_module.Externals.insert(tExternalsItem.create(aktvarsym.mangledname));
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end;
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symdone:=true;
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end
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else
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if (is_object) and (cs_static_keyword in aktmoduleswitches) and (idtoken=_STATIC) then
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begin
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include(current_object_option,sp_static);
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insert_syms(symtablestack,sc,tt,false);
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exclude(current_object_option,sp_static);
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consume(_STATIC);
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consume(_SEMICOLON);
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symdone:=true;
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end;
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end;
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{ insert it in the symtable, if not done yet }
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if not symdone then
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begin
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{ save object option, because we can turn of the sp_published }
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if (sp_published in current_object_option) and
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not(is_class(tt.def)) then
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begin
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Message(parser_e_cant_publish_that);
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exclude(current_object_option,sp_published);
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end
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else
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if (sp_published in current_object_option) and
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not(oo_can_have_published in tobjectdef(tt.def).objectoptions) then
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begin
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Message(parser_e_only_publishable_classes_can__be_published);
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exclude(current_object_option,sp_published);
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end;
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insert_syms(symtablestack,sc,tt,is_threadvar);
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current_object_option:=old_current_object_option;
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end;
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end;
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{ Check for Case }
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if is_record and (token=_CASE) then
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begin
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maxsize:=0;
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maxalignment:=0;
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consume(_CASE);
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s:=pattern;
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searchsym(s,srsym,srsymtable);
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{ may be only a type: }
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if assigned(srsym) and (srsym.typ in [typesym,unitsym]) then
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begin
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{ for records, don't search the recordsymtable for
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the symbols of the types }
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oldsymtablestack:=symtablestack;
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symtablestack:=symtablestack.next;
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read_type(casetype,'');
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symtablestack:=oldsymtablestack;
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end
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else
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begin
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consume(_ID);
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consume(_COLON);
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{ for records, don't search the recordsymtable for
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the symbols of the types }
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oldsymtablestack:=symtablestack;
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symtablestack:=symtablestack.next;
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read_type(casetype,'');
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symtablestack:=oldsymtablestack;
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symtablestack.insert(tvarsym.create(s,casetype));
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end;
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if not(is_ordinal(casetype.def)) or is_64bitint(casetype.def) then
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Message(type_e_ordinal_expr_expected);
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consume(_OF);
|
|
UnionSymtable:=trecordsymtable.create;
|
|
Unionsymtable.next:=symtablestack;
|
|
registerdef:=false;
|
|
UnionDef:=trecorddef.create(unionsymtable);
|
|
registerdef:=true;
|
|
symtablestack:=UnionSymtable;
|
|
startvarrecsize:=symtablestack.datasize;
|
|
startvarrecalign:=symtablestack.dataalignment;
|
|
repeat
|
|
repeat
|
|
pt:=comp_expr(true);
|
|
if not(pt.nodetype=ordconstn) then
|
|
Message(cg_e_illegal_expression);
|
|
pt.free;
|
|
if token=_COMMA then
|
|
consume(_COMMA)
|
|
else
|
|
break;
|
|
until false;
|
|
consume(_COLON);
|
|
{ read the vars }
|
|
consume(_LKLAMMER);
|
|
inc(variantrecordlevel);
|
|
if token<>_RKLAMMER then
|
|
read_var_decs(true,false,false);
|
|
dec(variantrecordlevel);
|
|
consume(_RKLAMMER);
|
|
{ calculates maximal variant size }
|
|
maxsize:=max(maxsize,symtablestack.datasize);
|
|
maxalignment:=max(maxalignment,symtablestack.dataalignment);
|
|
{ the items of the next variant are overlayed }
|
|
symtablestack.datasize:=startvarrecsize;
|
|
symtablestack.dataalignment:=startvarrecalign;
|
|
if (token<>_END) and (token<>_RKLAMMER) then
|
|
consume(_SEMICOLON)
|
|
else
|
|
break;
|
|
until (token=_END) or (token=_RKLAMMER);
|
|
{ at last set the record size to that of the biggest variant }
|
|
symtablestack.datasize:=maxsize;
|
|
symtablestack.dataalignment:=maxalignment;
|
|
uniontype.def:=uniondef;
|
|
uniontype.sym:=nil;
|
|
UnionSym:=tvarsym.create('case',uniontype);
|
|
symtablestack:=symtablestack.next;
|
|
{ we do NOT call symtablestack.insert
|
|
on purpose PM }
|
|
if aktalignment.recordalignmax=-1 then
|
|
begin
|
|
{$ifdef i386}
|
|
if maxalignment>2 then
|
|
minalignment:=4
|
|
else if maxalignment>1 then
|
|
minalignment:=2
|
|
else
|
|
minalignment:=1;
|
|
{$else}
|
|
{$ifdef m68k}
|
|
minalignment:=2;
|
|
{$endif}
|
|
minalignment:=1;
|
|
{$endif}
|
|
end
|
|
else
|
|
minalignment:=maxalignment;
|
|
usedalign:=used_align(maxalignment,minalignment,maxalignment);
|
|
offset:=align(symtablestack.datasize,usedalign);
|
|
symtablestack.datasize:=offset+unionsymtable.datasize;
|
|
if maxalignment>symtablestack.dataalignment then
|
|
symtablestack.dataalignment:=maxalignment;
|
|
trecordsymtable(Unionsymtable).Insert_in(symtablestack,offset);
|
|
Unionsym.owner:=nil;
|
|
unionsym.free;
|
|
uniondef.free;
|
|
end;
|
|
block_type:=old_block_type;
|
|
current_object_option:=old_current_object_option;
|
|
end;
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.20 2001-09-30 21:15:48 peter
|
|
* merged absolute support for constants
|
|
|
|
Revision 1.19 2001/08/30 20:13:53 peter
|
|
* rtti/init table updates
|
|
* rttisym for reusable global rtti/init info
|
|
* support published for interfaces
|
|
|
|
Revision 1.18 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 1.17 2001/06/03 21:57:36 peter
|
|
+ hint directive parsing support
|
|
|
|
Revision 1.16 2001/04/18 22:01:57 peter
|
|
* registration of targets and assemblers
|
|
|
|
Revision 1.15 2001/04/13 01:22:12 peter
|
|
* symtable change to classes
|
|
* range check generation and errors fixed, make cycle DEBUG=1 works
|
|
* memory leaks fixed
|
|
|
|
Revision 1.14 2001/04/04 22:43:52 peter
|
|
* remove unnecessary calls to firstpass
|
|
|
|
Revision 1.13 2001/04/04 21:30:45 florian
|
|
* applied several fixes to get the DD8 Delphi Unit compiled
|
|
e.g. "forward"-interfaces are working now
|
|
|
|
Revision 1.12 2001/04/02 21:20:33 peter
|
|
* resulttype rewrite
|
|
|
|
Revision 1.11 2001/03/11 22:58:50 peter
|
|
* getsym redesign, removed the globals srsym,srsymtable
|
|
|
|
Revision 1.10 2001/03/06 18:28:02 peter
|
|
* patch from Pavel with a new and much faster DLL Scanner for
|
|
automatic importing so $linklib works for DLLs. Thanks Pavel!
|
|
|
|
Revision 1.9 2001/02/20 21:42:54 peter
|
|
* record and object declaration with same field as type fixed
|
|
|
|
Revision 1.7 2001/02/20 11:19:45 marco
|
|
* Fix passing tvarrec to array of const
|
|
|
|
Revision 1.6 2000/12/25 00:07:27 peter
|
|
+ new tlinkedlist class (merge of old tstringqueue,tcontainer and
|
|
tlinkedlist objects)
|
|
|
|
Revision 1.5 2000/12/17 14:00:18 peter
|
|
* fixed static variables
|
|
|
|
Revision 1.4 2000/11/29 00:30:36 florian
|
|
* unused units removed from uses clause
|
|
* some changes for widestrings
|
|
|
|
Revision 1.3 2000/11/04 14:25:20 florian
|
|
+ merged Attila's changes for interfaces, not tested yet
|
|
|
|
Revision 1.2 2000/10/31 22:02:49 peter
|
|
* symtable splitted, no real code changes
|
|
|
|
Revision 1.1 2000/10/14 10:14:51 peter
|
|
* moehrendorf oct 2000 rewrite
|
|
|
|
}
|