freepascal.compiler/compiler/pdecsub.pas

{
    $Id$
    Copyright (c) 1998-2000 by Florian Klaempfl, Daniel Mantione

    Does the parsing of the procedures/functions

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 ****************************************************************************
}
unit pdecsub;

{$i defines.inc}

interface

    uses
      tokens,symconst,symtype,symdef,symsym;

    const
      pd_global    = $1;    { directive must be global }
      pd_body      = $2;    { directive needs a body }
      pd_implemen  = $4;    { directive can be used implementation section }
      pd_interface = $8;    { directive can be used interface section }
      pd_object    = $10;   { directive can be used object declaration }
      pd_procvar   = $20;   { directive can be used procvar declaration }
      pd_notobject = $40;   { directive can not be used object declaration }
      pd_notobjintf= $80;   { directive can not be used interface declaration }

    function  is_proc_directive(tok:ttoken):boolean;
    function  check_identical_proc(var p : tprocdef) : boolean;

    procedure parameter_dec(aktprocdef:tabstractprocdef);

    procedure parse_proc_directives(var pdflags:word);

    procedure parse_proc_head(options:tproctypeoption);
    procedure parse_proc_dec;
    procedure parse_var_proc_directives(var sym : tsym);
    procedure parse_object_proc_directives(var sym : tprocsym);


implementation

    uses
{$ifdef delphi}
       sysutils,
{$else delphi}
       strings,
{$endif delphi}
       { common }
       cutils,cclasses,
       { global }
       globtype,globals,verbose,
       systems,
       { aasm }
       aasm,
       { symtable }
       symbase,symtable,types,
       { pass 1 }
       node,htypechk,
       nmat,nadd,ncal,nset,ncnv,ninl,ncon,nld,nflw,
       { parser }
       fmodule,scanner,
       pbase,pexpr,ptype,pdecl,
       { linking }
       import,gendef,
       { codegen }
{$ifdef newcg}
       cgbase
{$else}
       hcodegen
{$endif}
       ;


    procedure parameter_dec(aktprocdef:tabstractprocdef);
      {
        handle_procvar needs the same changes
      }
      var
        is_procvar : boolean;
        sc      : tidstringlist;
        s       : string;
        hpos,
        storetokenpos : tfileposinfo;
        htype,
        tt      : ttype;
        hvs,
        vs      : tvarsym;
        srsym   : tsym;
        hs1,hs2 : string;
        varspez : Tvarspez;
        inserthigh : boolean;
        tdefaultvalue : tconstsym;
        defaultrequired : boolean;
      begin
        { reset }
        defaultrequired:=false;
        { parsing a proc or procvar ? }
        is_procvar:=(aktprocdef.deftype=procvardef);
        consume(_LKLAMMER);
        { Delphi/Kylix supports nonsense like }
        { procedure p();                      }
        if try_to_consume(_RKLAMMER) and
          not(m_tp7 in aktmodeswitches) then
          exit;
        inc(testcurobject);
        repeat
          if try_to_consume(_VAR) then
            varspez:=vs_var
          else
            if try_to_consume(_CONST) then
              varspez:=vs_const
          else
            if (idtoken=_OUT) and (m_out in aktmodeswitches) then
              begin
                 consume(_OUT);
                 varspez:=vs_out
              end
          else
              varspez:=vs_value;
          inserthigh:=false;
          tdefaultvalue:=nil;
          tt.reset;
          { self is only allowed in procvars and class methods }
          if (idtoken=_SELF) and
             (is_procvar or
              (assigned(procinfo^._class) and is_class(procinfo^._class))) then
            begin
              if not is_procvar then
               begin
{$ifndef UseNiceNames}
                 hs2:=hs2+'$'+'self';
{$else UseNiceNames}
                 hs2:=hs2+tostr(length('self'))+'self';
{$endif UseNiceNames}
                 htype.setdef(procinfo^._class);
                 vs:=tvarsym.create('@',htype);
                 vs.varspez:=vs_var;
               { insert the sym in the parasymtable }
                 tprocdef(aktprocdef).parast.insert(vs);
                 include(aktprocdef.procoptions,po_containsself);
                 inc(procinfo^.selfpointer_offset,vs.address);
               end;
              consume(idtoken);
              consume(_COLON);
              single_type(tt,hs1,false);
              aktprocdef.concatpara(tt,vs_value,nil);
              { check the types for procedures only }
              if not is_procvar then
               CheckTypes(tt.def,procinfo^._class);
            end
          else
            begin
             { read identifiers }
               sc:=consume_idlist;
{$ifdef fixLeaksOnError}
               strContStack.push(sc);
{$endif fixLeaksOnError}
             { read type declaration, force reading for value and const paras }
               if (token=_COLON) or (varspez=vs_value) then
                begin
                  consume(_COLON);
                { check for an open array }
                  if token=_ARRAY then
                   begin
                     consume(_ARRAY);
                     consume(_OF);
                   { define range and type of range }
                     tt.setdef(tarraydef.create(0,-1,s32bittype));
                   { array of const ? }
                     if (token=_CONST) and (m_objpas in aktmodeswitches) then
                      begin
                        consume(_CONST);
                        srsym:=searchsymonlyin(systemunit,'TVARREC');
                        if not assigned(srsym) then
                         InternalError(1234124);
                        tarraydef(tt.def).elementtype:=ttypesym(srsym).restype;
                        tarraydef(tt.def).IsArrayOfConst:=true;
                        hs1:='array_of_const';
                      end
                     else
                      begin
                        { define field type }
                        single_type(tarraydef(tt.def).elementtype,hs1,false);
                        hs1:='array_of_'+hs1;
                      end;
                     inserthigh:=true;
                   end
                  else
                   begin
                     { open string ? }
                     if (varspez=vs_var) and
                             (
                               (
                                 ((token=_STRING) or (idtoken=_SHORTSTRING)) and
                                 (cs_openstring in aktmoduleswitches) and
                                 not(cs_ansistrings in aktlocalswitches)
                               ) or
                             (idtoken=_OPENSTRING)) then
                      begin
                        consume(token);
                        tt:=openshortstringtype;
                        hs1:='openstring';
                        inserthigh:=true;
                      end
                     else
                      begin
                        { everything else }
                        single_type(tt,hs1,false);
                      end;
                     { default parameter }
                     if (m_default_para in aktmodeswitches) then
                      begin
                        if try_to_consume(_EQUAL) then
                         begin
                           s:=sc.get(hpos);
                           if not sc.empty then
                            Comment(V_Error,'default value only allowed for one parameter');
                           sc.add(s,hpos);
                           { prefix 'def' to the parameter name }
                           tdefaultvalue:=ReadConstant('$def'+Upper(s),hpos);
                           if assigned(tdefaultvalue) then
                            tprocdef(aktprocdef).parast.insert(tdefaultvalue);
                           defaultrequired:=true;
                         end
                        else
                         begin
                           if defaultrequired then
                            Comment(V_Error,'default parameter required');
                         end;
                      end;
                   end;
                end
               else
                begin
{$ifndef UseNiceNames}
                  hs1:='$$$';
{$else UseNiceNames}
                  hs1:='var';
{$endif UseNiceNames}
                  tt:=cformaltype;
                end;
               if not is_procvar then
                hs2:=tprocdef(aktprocdef).mangledname;
               storetokenpos:=akttokenpos;
               while not sc.empty do
                begin
                  s:=sc.get(akttokenpos);
                  aktprocdef.concatpara(tt,varspez,tdefaultvalue);
                  { For proc vars we only need the definitions }
                  if not is_procvar then
                   begin
{$ifndef UseNiceNames}
                     hs2:=hs2+'$'+hs1;
{$else UseNiceNames}
                     hs2:=hs2+tostr(length(hs1))+hs1;
{$endif UseNiceNames}
                     vs:=tvarsym.create(s,tt);
                     vs.varspez:=varspez;
                   { we have to add this to avoid var param to be in registers !!!}
                   { I don't understand the comment above,                          }
                   { but I suppose the comment is wrong and                         }
                   { it means that the address of var parameters can be placed      }
                   { in a register (FK)                                             }
                     if (varspez in [vs_var,vs_const,vs_out]) and push_addr_param(tt.def) then
                       include(vs.varoptions,vo_regable);

                   { insert the sym in the parasymtable }
                     tprocdef(aktprocdef).parast.insert(vs);

                   { do we need a local copy? Then rename the varsym, do this after the
                     insert so the dup id checking is done correctly }
                     if (varspez=vs_value) and
                        push_addr_param(tt.def) and
                        not(is_open_array(tt.def) or is_array_of_const(tt.def)) then
                       tprocdef(aktprocdef).parast.rename(vs.name,'val'+vs.name);

                   { also need to push a high value? }
                     if inserthigh then
                      begin
                        hvs:=tvarsym.create('$high'+Upper(s),s32bittype);
                        hvs.varspez:=vs_const;
                        tprocdef(aktprocdef).parast.insert(hvs);
                      end;

                   end;
                end;
{$ifdef fixLeaksOnError}
               if PStringContainer(strContStack.pop) <> sc then
                  writeln('problem with strContStack in pdecl (1)');
{$endif fixLeaksOnError}
               sc.free;
               akttokenpos:=storetokenpos;
            end;
          { set the new mangled name }
          if not is_procvar then
            tprocdef(aktprocdef).setmangledname(hs2);
        until not try_to_consume(_SEMICOLON);
        dec(testcurobject);
        consume(_RKLAMMER);
      end;




procedure parse_proc_head(options:tproctypeoption);
var orgsp,sp:stringid;
    pd:tprocdef;
    paramoffset:longint;
    sym:tsym;
    hs:string;
    doinsert : boolean;
    st : tsymtable;
    srsymtable : tsymtable;
    overloaded_level:word;
    storepos,procstartfilepos : tfileposinfo;
    i: longint;
begin
{ Save the position where this procedure really starts and set col to 1 which
  looks nicer }
  procstartfilepos:=akttokenpos;
{  procstartfilepos.column:=1; I do not agree here !!
   lets keep excat position PM }

  if (options=potype_operator) then
    begin
      sp:=overloaded_names[optoken];
      orgsp:=sp;
    end
  else
    begin
      sp:=pattern;
      orgsp:=orgpattern;
      consume(_ID);
    end;

    { examine interface map: function/procedure iname.functionname=locfuncname }
    if parse_only and
       assigned(procinfo^._class) and
       assigned(procinfo^._class.implementedinterfaces) and
       (procinfo^._class.implementedinterfaces.count>0) and
       try_to_consume(_POINT) then
      begin
         storepos:=akttokenpos;
         akttokenpos:=procstartfilepos;
         { get interface syms}
         searchsym(sp,sym,srsymtable);
         if not assigned(sym) then
          begin
            identifier_not_found(orgsp);
            sym:=generrorsym;
          end;
         akttokenpos:=storepos;
         { load proc name }
         if sym.typ=typesym then
           i:=procinfo^._class.implementedinterfaces.searchintf(ttypesym(sym).restype.def);
         { qualifier is interface name? }
         if (sym.typ<>typesym) or (ttypesym(sym).restype.def.deftype<>objectdef) or
            (i=-1) then
           begin
              Message(parser_e_interface_id_expected);
              aktprocsym:=nil;
           end
         else
           begin
              aktprocsym:=tprocsym(procinfo^._class.implementedinterfaces.interfaces(i).symtable.search(sp));
              { the method can be declared after the mapping FK
                if not(assigned(aktprocsym)) then
                  Message(parser_e_methode_id_expected);
              }
           end;
         consume(_ID);
         consume(_EQUAL);
         if (token=_ID) { and assigned(aktprocsym) } then
           procinfo^._class.implementedinterfaces.addmappings(i,sp,pattern);
         consume(_ID);
         exit;
    end;

  { method  ? }
  if not(parse_only) and
     (lexlevel=normal_function_level) and
     try_to_consume(_POINT) then
   begin
     { search for object name }
     storepos:=akttokenpos;
     akttokenpos:=procstartfilepos;
     searchsym(sp,sym,srsymtable);
     if not assigned(sym) then
      begin
        identifier_not_found(orgsp);
        sym:=generrorsym;
      end;
     akttokenpos:=storepos;
     { consume proc name }
     sp:=pattern;
     orgsp:=orgpattern;
     procstartfilepos:=akttokenpos;
     consume(_ID);
     { qualifier is class name ? }
     if (sym.typ<>typesym) or
        (ttypesym(sym).restype.def.deftype<>objectdef) then
       begin
          Message(parser_e_class_id_expected);
          aktprocsym:=nil;
       end
     else
       begin
          { used to allow private syms to be seen }
          aktobjectdef:=tobjectdef(ttypesym(sym).restype.def);
          procinfo^._class:=tobjectdef(ttypesym(sym).restype.def);
          aktprocsym:=tprocsym(procinfo^._class.symtable.search(sp));
          {The procedure has been found. So it is
           a global one. Set the flags to mark this.}
          procinfo^.flags:=procinfo^.flags or pi_is_global;
          aktobjectdef:=nil;
          { we solve this below }
          if not(assigned(aktprocsym)) then
            Message(parser_e_methode_id_expected);
       end;
   end
  else
   begin
     { check for constructor/destructor which is not allowed here }
     if (not parse_only) and
        (options in [potype_constructor,potype_destructor]) then
        Message(parser_e_constructors_always_objects);

     akttokenpos:=procstartfilepos;
     aktprocsym:=tprocsym(symtablestack.search(sp));

     if not(parse_only) then
       begin
         {The procedure we prepare for is in the implementation
          part of the unit we compile. It is also possible that we
          are compiling a program, which is also some kind of
          implementaion part.

          We need to find out if the procedure is global. If it is
          global, it is in the global symtable.}
         if not assigned(aktprocsym) and
            (symtablestack.symtabletype=staticsymtable) and
            assigned(symtablestack.next) and
            (symtablestack.next.unitid=0) then
          begin
            {Search the procedure in the global symtable.}
            aktprocsym:=tprocsym(symtablestack.next.search(sp));
            if assigned(aktprocsym) then
             begin
               {Check if it is a procedure.}
               if aktprocsym.typ<>procsym then
                DuplicateSym(aktprocsym);
               {The procedure has been found. So it is
                a global one. Set the flags to mark this.}
               procinfo^.flags:=procinfo^.flags or pi_is_global;
             end;
          end;
       end;
   end;

{ Create the mangledname }
{$ifndef UseNiceNames}
  if assigned(procinfo^._class) then
   begin
     if (pos('_$$_',procprefix)=0) then
      hs:=procprefix+'_$$_'+upper(procinfo^._class.objname^)+'_$$_'+sp
     else
      hs:=procprefix+'_$'+sp;
   end
  else
   begin
     if lexlevel=normal_function_level then
      hs:=procprefix+'_'+sp
     else
      hs:=procprefix+'_$'+sp;
   end;
{$else UseNiceNames}
  if assigned(procinfo^._class) then
   begin
     if (pos('_5Class_',procprefix)=0) then
      hs:=procprefix+'_5Class_'+procinfo^._class.name^+'_'+tostr(length(sp))+sp
     else
      hs:=procprefix+'_'+tostr(length(sp))+sp;
   end
  else
   begin
     if lexlevel=normal_function_level then
      hs:=procprefix+'_'+tostr(length(sp))+sp
     else
      hs:=lowercase(procprefix)+'_'+tostr(length(sp))+sp;
   end;
{$endif UseNiceNames}

  doinsert:=true;
  if assigned(aktprocsym) then
   begin
     { Check if overloaded is a procsym }
     if aktprocsym.typ<>procsym then
      begin
        { when the other symbol is a unit symbol then hide the unit
          symbol. Only in tp mode because it's bad programming }
        if (m_tp in aktmodeswitches) and
           (aktprocsym.typ=unitsym) then
         begin
           aktprocsym.owner.rename(aktprocsym.name,'hidden'+aktprocsym.name);
         end
        else
         begin
           {  we use a different error message for tp7 so it looks more compatible }
           if (m_fpc in aktmodeswitches) then
            Message1(parser_e_overloaded_no_procedure,aktprocsym.realname)
           else
            DuplicateSym(aktprocsym);
           { don't reinsert as that will generated another error }
           doinsert:=false;
         end;
        { generate a new aktprocsym }
        aktprocsym:=nil;
      end;
   end;

  { test again if assigned, it can be reset to recover }
  if not assigned(aktprocsym) then
   begin
     { create a new procsym and set the real filepos }
     akttokenpos:=procstartfilepos;
     { for operator we have only one definition for each overloaded
       operation }
     if (options=potype_operator) then
       begin
          { create the procsym with saving the original case }
          aktprocsym:=tprocsym.create('$'+sp);
          { the only problem is that nextoverloaded might not be in a unit
            known for the unit itself }
          { not anymore PM }
          if assigned(overloaded_operators[optoken]) then
            aktprocsym.definition:=overloaded_operators[optoken].definition;
          overloaded_operators[optoken]:=aktprocsym;
       end
      else
       aktprocsym:=tprocsym.create(orgsp);
      if doinsert then
       symtablestack.insert(aktprocsym);
   end;

  st:=symtablestack;
  pd:=tprocdef.create;
  pd.symtablelevel:=symtablestack.symtablelevel;

  if assigned(procinfo^._class) then
    pd._class := procinfo^._class;

  { set the options from the caller (podestructor or poconstructor) }
  pd.proctypeoption:=options;

  { calculate the offset of the parameters }
  paramoffset:=8;

  { calculate frame pointer offset }
  if lexlevel>normal_function_level then
    begin
      procinfo^.framepointer_offset:=paramoffset;
      inc(paramoffset,target_info.size_of_pointer);
      { this is needed to get correct framepointer push for local
        forward functions !! }
      pd.parast.symtablelevel:=lexlevel;
    end;

  if assigned (procinfo^._Class)  and
     is_object(procinfo^._Class) and
     (pd.proctypeoption in [potype_constructor,potype_destructor]) then
    inc(paramoffset,target_info.size_of_pointer);

  { self pointer offset                       }
  { self isn't pushed in nested procedure of methods }
  if assigned(procinfo^._class) and (lexlevel=normal_function_level) then
    begin
      procinfo^.selfpointer_offset:=paramoffset;
      if assigned(aktprocsym.definition) and
         not(po_containsself in aktprocsym.definition.procoptions) then
        inc(paramoffset,target_info.size_of_pointer);
    end;

  { con/-destructor flag ? }
  if assigned (procinfo^._Class) and
     is_class(procinfo^._class) and
     (pd.proctypeoption in [potype_destructor,potype_constructor]) then
    inc(paramoffset,target_info.size_of_pointer);

  procinfo^.para_offset:=paramoffset;

  pd.parast.datasize:=0;

  pd.nextoverloaded:=aktprocsym.definition;
  aktprocsym.definition:=pd;
  { this is probably obsolete now PM }
  aktprocsym.definition.fileinfo:=procstartfilepos;
  aktprocsym.definition.setmangledname(hs);
  aktprocsym.definition.procsym:=aktprocsym;

  if not parse_only then
    begin
       overloaded_level:=0;
       { we need another procprefix !!! }
       { count, but only those in the same unit !!}
       while assigned(pd) and
          (pd.owner.symtabletype in [globalsymtable,staticsymtable]) do
         begin
            { only count already implemented functions }
            if  not(pd.forwarddef) then
              inc(overloaded_level);
            pd:=pd.nextoverloaded;
         end;
       if overloaded_level>0 then
         procprefix:=hs+'$'+tostr(overloaded_level)+'$'
       else
         procprefix:=hs+'$';
    end;

  { this must also be inserted in the right symtable !! PM }
  { otherwise we get subbtle problems with
    definitions of args defs in staticsymtable for
    implementation of a global method }
  if token=_LKLAMMER then
    parameter_dec(aktprocsym.definition);

  { so we only restore the symtable now }
  symtablestack:=st;
  if (options=potype_operator) then
    overloaded_operators[optoken]:=aktprocsym;
end;


procedure parse_proc_dec;
var
  hs : string;
  isclassmethod : boolean;
begin
  inc(lexlevel);
{ read class method }
  if token=_CLASS then
   begin
     consume(_CLASS);
     isclassmethod:=true;
   end
  else
   isclassmethod:=false;
  case token of
     _FUNCTION : begin
                   consume(_FUNCTION);
                   parse_proc_head(potype_none);
                   if token<>_COLON then
                    begin
                       if assigned(aktprocsym) and
                          not(is_interface(aktprocsym.definition._class)) and
                          not(aktprocsym.definition.forwarddef) or
                         (m_repeat_forward in aktmodeswitches) then
                       begin
                         consume(_COLON);
                         consume_all_until(_SEMICOLON);
                       end;
                    end
                   else
                    begin
                      consume(_COLON);
                      inc(testcurobject);
                      single_type(aktprocsym.definition.rettype,hs,false);
                      aktprocsym.definition.test_if_fpu_result;
                      dec(testcurobject);
                    end;
                 end;
    _PROCEDURE : begin
                   consume(_PROCEDURE);
                   parse_proc_head(potype_none);
                   if assigned(aktprocsym) then
                     aktprocsym.definition.rettype:=voidtype;
                 end;
  _CONSTRUCTOR : begin
                   consume(_CONSTRUCTOR);
                   parse_proc_head(potype_constructor);
                   if assigned(procinfo^._class) and
                      is_class(procinfo^._class) then
                    begin
                      { CLASS constructors return the created instance }
                      aktprocsym.definition.rettype.setdef(procinfo^._class);
                    end
                   else
                    begin
                      { OBJECT constructors return a boolean }
                      aktprocsym.definition.rettype:=booltype;
                    end;
                 end;
   _DESTRUCTOR : begin
                   consume(_DESTRUCTOR);
                   parse_proc_head(potype_destructor);
                   aktprocsym.definition.rettype:=voidtype;
                 end;
     _OPERATOR : begin
                   if lexlevel>normal_function_level then
                     Message(parser_e_no_local_operator);
                   consume(_OPERATOR);
                   if (token in [first_overloaded..last_overloaded]) then
                    begin
                      procinfo^.flags:=procinfo^.flags or pi_operator;
                      optoken:=token;
                    end
                   else
                    begin
                      Message(parser_e_overload_operator_failed);
                      { Use the dummy NOTOKEN that is also declared
                        for the overloaded_operator[] }
                      optoken:=NOTOKEN;
                    end;
                   consume(Token);
                   parse_proc_head(potype_operator);
                   if token<>_ID then
                     begin
                        otsym:=nil;
                        if not(m_result in aktmodeswitches) then
                          consume(_ID);
                     end
                   else
                     begin
                       otsym:=tvarsym.create(pattern,voidtype);
                       consume(_ID);
                     end;
                   if not try_to_consume(_COLON) then
                     begin
                       consume(_COLON);
                       aktprocsym.definition.rettype:=generrortype;
                       consume_all_until(_SEMICOLON);
                     end
                   else
                    begin
                      single_type(aktprocsym.definition.rettype,hs,false);
                      aktprocsym.definition.test_if_fpu_result;
                      if (optoken in [_EQUAL,_GT,_LT,_GTE,_LTE]) and
                         ((aktprocsym.definition.rettype.def.deftype<>
                         orddef) or (torddef(aktprocsym.definition.
                         rettype.def).typ<>bool8bit)) then
                        Message(parser_e_comparative_operator_return_boolean);
                       if assigned(otsym) then
                         otsym.vartype.def:=aktprocsym.definition.rettype.def;
                       { We need to add the return type in the mangledname
                         to allow overloading with just different results !! (PM) }
                       aktprocsym.definition.setmangledname(
                         aktprocsym.definition.mangledname+'$$'+hs);
                       if (optoken=_ASSIGNMENT) and
                          is_equal(aktprocsym.definition.rettype.def,
                             tvarsym(aktprocsym.definition.parast.symindex.first).vartype.def) then
                         message(parser_e_no_such_assignment)
                       else if not isoperatoracceptable(aktprocsym.definition,optoken) then
                         Message(parser_e_overload_impossible);
                     end;
                 end;
  end;
  if isclassmethod and
     assigned(aktprocsym) then
    include(aktprocsym.definition.procoptions,po_classmethod);
  { support procedure proc;stdcall export; in Delphi mode only }
  if not((m_delphi in aktmodeswitches) and
     is_proc_directive(token)) then
   consume(_SEMICOLON);
  dec(lexlevel);
end;


{****************************************************************************
                        Procedure directive handlers
****************************************************************************}

procedure pd_far;
begin
  Message(parser_w_proc_far_ignored);
end;

procedure pd_near;
begin
  Message(parser_w_proc_near_ignored);
end;

procedure pd_export;
begin
  if assigned(procinfo^._class) then
    Message(parser_e_methods_dont_be_export);
  if lexlevel<>normal_function_level then
    Message(parser_e_dont_nest_export);
  { only os/2 needs this }
  if target_info.target=target_i386_os2 then
   begin
     aktprocsym.definition.aliasnames.insert(aktprocsym.realname);
     procinfo^.exported:=true;
     if cs_link_deffile in aktglobalswitches then
       deffile.AddExport(aktprocsym.definition.mangledname);
   end;
end;

procedure pd_inline;
begin
  if not(cs_support_inline in aktmoduleswitches) then
   begin
     Message(parser_e_proc_inline_not_supported);
     exclude(aktprocsym.definition.proccalloptions,pocall_inline);
   end;
end;

procedure pd_forward;
begin
  aktprocsym.definition.forwarddef:=true;
end;

procedure pd_stdcall;
begin
end;

procedure pd_safecall;
begin
end;

procedure pd_alias;
begin
  consume(_COLON);
  aktprocsym.definition.aliasnames.insert(get_stringconst);
end;

procedure pd_asmname;
begin
  aktprocsym.definition.setmangledname(target_info.Cprefix+pattern);
  if token=_CCHAR then
    consume(_CCHAR)
  else
    consume(_CSTRING);
  { we don't need anything else }
  aktprocsym.definition.forwarddef:=false;
end;

procedure pd_intern;
begin
  consume(_COLON);
  aktprocsym.definition.extnumber:=get_intconst;
end;

procedure pd_interrupt;
begin
{$ifndef i386}
  Message(parser_w_proc_interrupt_ignored);
{$else i386}
  if lexlevel<>normal_function_level then
    Message(parser_e_dont_nest_interrupt);
{$endif i386}
end;

procedure pd_system;
begin
  aktprocsym.definition.setmangledname(aktprocsym.realname);
end;

procedure pd_abstract;
begin
  if (po_virtualmethod in aktprocsym.definition.procoptions) then
    include(aktprocsym.definition.procoptions,po_abstractmethod)
  else
    Message(parser_e_only_virtual_methods_abstract);
  { the method is defined }
  aktprocsym.definition.forwarddef:=false;
end;

procedure pd_virtual;
{$ifdef WITHDMT}
var
  pt : tnode;
{$endif WITHDMT}
begin
  if (aktprocsym.definition.proctypeoption=potype_constructor) and
     is_object(aktprocsym.definition._class) then
    Message(parser_e_constructor_cannot_be_not_virtual);
{$ifdef WITHDMT}
  if is_object(aktprocsym.definition._class) and
    (token<>_SEMICOLON) then
    begin
       { any type of parameter is allowed here! }
       pt:=comp_expr(true);
       if is_constintnode(pt) then
         begin
           include(aktprocsym.definition.procoptions,po_msgint);
           aktprocsym.definition.messageinf.i:=pt^.value;
         end
       else
         Message(parser_e_ill_msg_expr);
       disposetree(pt);
    end;
{$endif WITHDMT}
end;

procedure pd_static;
begin
  if (cs_static_keyword in aktmoduleswitches) then
    begin
      include(aktprocsym.symoptions,sp_static);
      include(aktprocsym.definition.procoptions,po_staticmethod);
    end;
end;

procedure pd_override;
begin
  if not(is_class_or_interface(aktprocsym.definition._class)) then
    Message(parser_e_no_object_override);
end;

procedure pd_overload;
begin
   include(aktprocsym.symoptions,sp_has_overloaded);
end;

procedure pd_message;
var
  pt : tnode;
begin
  { check parameter type }
  if not(po_containsself in aktprocsym.definition.procoptions) and
     ((aktprocsym.definition.minparacount<>1) or
      (aktprocsym.definition.maxparacount<>1) or
      (TParaItem(aktprocsym.definition.Para.first).paratyp<>vs_var)) then
   Message(parser_e_ill_msg_param);
  pt:=comp_expr(true);
  if pt.nodetype=stringconstn then
    begin
      include(aktprocsym.definition.procoptions,po_msgstr);
      aktprocsym.definition.messageinf.str:=strnew(tstringconstnode(pt).value_str);
    end
  else
   if is_constintnode(pt) then
    begin
      include(aktprocsym.definition.procoptions,po_msgint);
      aktprocsym.definition.messageinf.i:=tordconstnode(pt).value;
    end
  else
    Message(parser_e_ill_msg_expr);
  pt.free;
end;


procedure resetvaluepara(p:tnamedindexitem);
begin
  if tsym(p).typ=varsym then
    with tvarsym(p) do
       if copy(name,1,3)='val' then
          aktprocsym.definition.parast.symsearch.rename(name,copy(name,4,length(name)));
end;


procedure pd_cdecl;
begin
  if aktprocsym.definition.deftype<>procvardef then
    aktprocsym.definition.setmangledname(target_info.Cprefix+aktprocsym.realname);
  { do not copy on local !! }
  if (aktprocsym.definition.deftype=procdef) and
     assigned(aktprocsym.definition.parast) then
    aktprocsym.definition.parast.foreach_static({$ifdef FPCPROCVAR}@{$endif}resetvaluepara);
end;

procedure pd_cppdecl;
begin
  if aktprocsym.definition.deftype<>procvardef then
    aktprocsym.definition.setmangledname(
      target_info.Cprefix+aktprocsym.definition.cplusplusmangledname);
  { do not copy on local !! }
  if (aktprocsym.definition.deftype=procdef) and
     assigned(aktprocsym.definition.parast) then
    aktprocsym.definition.parast.foreach_static({$ifdef FPCPROCVAR}@{$endif}resetvaluepara);
end;


procedure pd_pascal;
var st,parast : tsymtable;
    lastps,ps : tsym;
begin
   st:=tparasymtable.create;
   parast:=aktprocsym.definition.parast;
   lastps:=nil;
   while assigned(parast.symindex.first) and (lastps<>tsym(parast.symindex.first)) do
     begin
       ps:=tsym(parast.symindex.first);
       while assigned(ps.indexnext) and (tsym(ps.indexnext)<>lastps) do
         ps:=tsym(ps.indexnext);
       ps.owner:=st;
       { recalculate the corrected offset }
       { the really_insert_in_data procedure
         for parasymtable should only calculateoffset PM }
       tstoredsym(ps).insert_in_data;
       { reset the owner correctly }
       ps.owner:=parast;
       lastps:=ps;
     end;
end;


procedure pd_register;
begin
  Message1(parser_w_proc_directive_ignored,'REGISTER');
end;


procedure pd_reintroduce;
begin
  Message1(parser_w_proc_directive_ignored,'REINTRODUCE');
end;


procedure pd_syscall;
begin
  aktprocsym.definition.forwarddef:=false;
  aktprocsym.definition.extnumber:=get_intconst;
end;


procedure pd_external;
{
  If import_dll=nil the procedure is assumed to be in another
  object file. In that object file it should have the name to
  which import_name is pointing to. Otherwise, the procedure is
  assumed to be in the DLL to which import_dll is pointing to. In
  that case either import_nr<>0 or import_name<>nil is true, so
  the procedure is either imported by number or by name. (DM)
}
var
  import_dll,
  import_name : string;
  import_nr   : word;
begin
  aktprocsym.definition.forwarddef:=false;
{ forbid local external procedures }
  if lexlevel>normal_function_level then
   Message(parser_e_no_local_external);
{ If the procedure should be imported from a DLL, a constant string follows.
  This isn't really correct, an contant string expression follows
  so we check if an semicolon follows, else a string constant have to
  follow (FK) }
  import_nr:=0;
  import_name:='';
  if not(token=_SEMICOLON) and not(idtoken=_NAME) then
    begin
      import_dll:=get_stringconst;
      if (idtoken=_NAME) then
       begin
         consume(_NAME);
         import_name:=get_stringconst;
       end;
      if (idtoken=_INDEX) then
       begin
         {After the word index follows the index number in the DLL.}
         consume(_INDEX);
         import_nr:=get_intconst;
       end;
      if (import_nr=0) and (import_name='') then
        {if (aktprocsym.definition.options and pocdecl)<>0 then
          import_name:=aktprocsym.definition.mangledname
        else
          Message(parser_w_empty_import_name);}
        { this should work both for win32 and Linux !! PM }
        import_name:=aktprocsym.realname;
      if not(current_module.uses_imports) then
       begin
         current_module.uses_imports:=true;
         importlib.preparelib(current_module.modulename^);
       end;
      if not(m_repeat_forward in aktmodeswitches) and
        { if the procedure is declared with the overload option     }
        { it requires a full declaration in the implementation part }
        not(sp_has_overloaded in aktprocsym.symoptions) then
        begin
          { we can only have one overloaded here ! }
          if assigned(aktprocsym.definition.nextoverloaded) then
            importlib.importprocedure(aktprocsym.definition.nextoverloaded.mangledname,
              import_dll,import_nr,import_name)
          else
            importlib.importprocedure(aktprocsym.mangledname,import_dll,import_nr,import_name);
        end
      else
        importlib.importprocedure(aktprocsym.mangledname,import_dll,import_nr,import_name);
    end
  else
    begin
      if (idtoken=_NAME) then
       begin
         consume(_NAME);
         import_name:=get_stringconst;
         aktprocsym.definition.setmangledname(import_name);
         if target_info.DllScanSupported then
           current_module.externals.insert(tExternalsItem.create(import_name));
       end
      else
       begin
         { external shouldn't override the cdecl/system name }
         if not (pocall_clearstack in aktprocsym.definition.proccalloptions) then
          begin
            aktprocsym.definition.setmangledname(aktprocsym.realname);
            if target_info.DllScanSupported then
             current_module.externals.insert(tExternalsItem.create(aktprocsym.realname));
          end;
       end;
    end;
end;


type
   pd_handler=procedure;
   proc_dir_rec=record
     idtok     : ttoken;
     pd_flags  : longint;
     handler   : pd_handler;
     pocall    : tproccalloptions;
     pooption  : tprocoptions;
     mutexclpocall : tproccalloptions;
     mutexclpotype : tproctypeoptions;
     mutexclpo     : tprocoptions;
   end;
const
  {Should contain the number of procedure directives we support.}
  num_proc_directives=34;
  proc_direcdata:array[1..num_proc_directives] of proc_dir_rec=
   (
    (
      idtok:_ABSTRACT;
      pd_flags : pd_interface+pd_object+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_abstract;
      pocall   : [];
      pooption : [po_abstractmethod];
      mutexclpocall : [pocall_internproc,pocall_inline];
      mutexclpotype : [potype_constructor,potype_destructor];
      mutexclpo     : [po_exports,po_interrupt,po_external]
    ),(
      idtok:_ALIAS;
      pd_flags : pd_implemen+pd_body+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_alias;
      pocall   : [];
      pooption : [];
      mutexclpocall : [pocall_inline];
      mutexclpotype : [];
      mutexclpo     : [po_external]
    ),(
      idtok:_ASMNAME;
      pd_flags : pd_interface+pd_implemen+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_asmname;
      pocall   : [pocall_cdecl,pocall_clearstack];
      pooption : [po_external];
      mutexclpocall : [pocall_internproc];
      mutexclpotype : [];
      mutexclpo     : [po_external]
    ),(
      idtok:_ASSEMBLER;
      pd_flags : pd_implemen+pd_body+pd_notobjintf;
      handler  : nil;
      pocall   : [];
      pooption : [po_assembler];
      mutexclpocall : [];
      mutexclpotype : [];
      mutexclpo     : [po_external]
    ),(
      idtok:_CDECL;
      pd_flags : pd_interface+pd_implemen+pd_body+pd_procvar;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_cdecl;
      pocall   : [pocall_cdecl,pocall_clearstack];
      pooption : [po_savestdregs];
      mutexclpocall : [pocall_cppdecl,pocall_internproc,
        pocall_leftright,pocall_inline];
      mutexclpotype : [];
      mutexclpo     : [po_assembler,po_external]
    ),(
      idtok:_DYNAMIC;
      pd_flags : pd_interface+pd_object+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_virtual;
      pocall   : [];
      pooption : [po_virtualmethod];
      mutexclpocall : [pocall_internproc,pocall_inline];
      mutexclpotype : [];
      mutexclpo     : [po_exports,po_interrupt,po_external]
    ),(
      idtok:_EXPORT;
      pd_flags : pd_body+pd_global+pd_interface+pd_implemen{??}+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_export;
      pocall   : [];
      pooption : [po_exports];
      mutexclpocall : [pocall_internproc,pocall_inline];
      mutexclpotype : [];
      mutexclpo     : [po_external,po_interrupt]
    ),(
      idtok:_EXTERNAL;
      pd_flags : pd_implemen+pd_interface+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_external;
      pocall   : [];
      pooption : [po_external];
      mutexclpocall : [pocall_internproc,pocall_inline,pocall_palmossyscall];
      mutexclpotype : [];
      mutexclpo     : [po_exports,po_interrupt,po_assembler]
    ),(
      idtok:_FAR;
      pd_flags : pd_implemen+pd_body+pd_interface+pd_procvar+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_far;
      pocall   : [];
      pooption : [];
      mutexclpocall : [pocall_internproc,pocall_inline];
      mutexclpotype : [];
      mutexclpo     : []
    ),(
      idtok:_FORWARD;
      pd_flags : pd_implemen+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_forward;
      pocall   : [];
      pooption : [];
      mutexclpocall : [pocall_internproc,pocall_inline];
      mutexclpotype : [];
      mutexclpo     : [po_external]
    ),(
      idtok:_INLINE;
      pd_flags : pd_implemen+pd_body+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_inline;
      pocall   : [pocall_inline];
      pooption : [];
      mutexclpocall : [pocall_internproc];
      mutexclpotype : [potype_constructor,potype_destructor];
      mutexclpo     : [po_exports,po_external,po_interrupt]
    ),(
      idtok:_INTERNCONST;
      pd_flags : pd_implemen+pd_body+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_intern;
      pocall   : [pocall_internconst];
      pooption : [];
      mutexclpocall : [];
      mutexclpotype : [potype_operator];
      mutexclpo     : []
    ),(
      idtok:_INTERNPROC;
      pd_flags : pd_implemen+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_intern;
      pocall   : [pocall_internproc];
      pooption : [];
      mutexclpocall : [pocall_inline,pocall_clearstack,pocall_leftright,pocall_cdecl,pocall_cppdecl];
      mutexclpotype : [potype_constructor,potype_destructor,potype_operator];
      mutexclpo     : [po_exports,po_external,po_interrupt,po_assembler,po_iocheck]
    ),(
      idtok:_INTERRUPT;
      pd_flags : pd_implemen+pd_body+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_interrupt;
      pocall   : [];
      pooption : [po_interrupt];
      mutexclpocall : [pocall_internproc,pocall_cdecl,pocall_cppdecl,
                       pocall_clearstack,pocall_leftright,pocall_inline];
      mutexclpotype : [potype_constructor,potype_destructor,potype_operator];
      mutexclpo     : [po_external]
    ),(
      idtok:_IOCHECK;
      pd_flags : pd_implemen+pd_body+pd_notobjintf;
      handler  : nil;
      pocall   : [];
      pooption : [po_iocheck];
      mutexclpocall : [pocall_internproc];
      mutexclpotype : [];
      mutexclpo     : [po_external]
    ),(
      idtok:_MESSAGE;
      pd_flags : pd_interface+pd_object+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_message;
      pocall   : [];
      pooption : []; { can be po_msgstr or po_msgint }
      mutexclpocall : [pocall_inline,pocall_internproc];
      mutexclpotype : [potype_constructor,potype_destructor,potype_operator];
      mutexclpo     : [po_interrupt,po_external]
    ),(
      idtok:_NEAR;
      pd_flags : pd_implemen+pd_body+pd_procvar+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_near;
      pocall   : [];
      pooption : [];
      mutexclpocall : [pocall_internproc];
      mutexclpotype : [];
      mutexclpo     : []
    ),(
      idtok:_OVERLOAD;
      pd_flags : pd_implemen+pd_interface+pd_body;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_overload;
      pocall   : [];
      pooption : [po_overload];
      mutexclpocall : [pocall_internproc];
      mutexclpotype : [];
      mutexclpo     : []
    ),(
      idtok:_OVERRIDE;
      pd_flags : pd_interface+pd_object+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_override;
      pocall   : [];
      pooption : [po_overridingmethod,po_virtualmethod];
      mutexclpocall : [pocall_inline,pocall_internproc];
      mutexclpotype : [];
      mutexclpo     : [po_exports,po_external,po_interrupt]
    ),(
      idtok:_PASCAL;
      pd_flags : pd_interface+pd_implemen+pd_body+pd_procvar;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_pascal;
      pocall   : [pocall_leftright];
      pooption : [];
      mutexclpocall : [pocall_internproc,pocall_cdecl,pocall_cppdecl,
                       pocall_clearstack,pocall_leftright,pocall_inline,
                       pocall_safecall];
      mutexclpotype : [];
      mutexclpo     : [po_external]
    ),(
      idtok:_POPSTACK;
      pd_flags : pd_interface+pd_implemen+pd_body+pd_procvar;
      handler  : nil;
      pocall   : [pocall_clearstack];
      pooption : [];
      mutexclpocall : [pocall_inline,pocall_internproc];
      mutexclpotype : [];
      mutexclpo     : [po_assembler,po_external]
    ),(
      idtok:_PUBLIC;
      pd_flags : pd_implemen+pd_body+pd_global+pd_notobject+pd_notobjintf;
      handler  : nil;
      pocall   : [];
      pooption : [];
      mutexclpocall : [pocall_internproc,pocall_inline];
      mutexclpotype : [];
      mutexclpo     : [po_external]
    ),(
      idtok:_REGISTER;
      pd_flags : pd_interface+pd_implemen+pd_body+pd_procvar;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_register;
      pocall   : [pocall_register];
      pooption : [];
      mutexclpocall : [pocall_leftright,pocall_cdecl,pocall_internproc,pocall_cppdecl];
      mutexclpotype : [];
      mutexclpo     : [po_external]
    ),(
      idtok:_REINTRODUCE;
      pd_flags : pd_interface+pd_object;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_reintroduce;
      pocall   : [];
      pooption : [];
      mutexclpocall : [];
      mutexclpotype : [];
      mutexclpo     : []
    ),(
      idtok:_SAFECALL;
      pd_flags : pd_interface+pd_implemen+pd_body+pd_procvar;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_safecall;
      pocall   : [pocall_safecall];
      pooption : [po_savestdregs];
      mutexclpocall : [pocall_leftright,pocall_cdecl,pocall_cppdecl,
        pocall_internproc,pocall_inline];
      mutexclpotype : [];
      mutexclpo     : [po_external]
    ),(
      idtok:_SAVEREGISTERS;
      pd_flags : pd_interface+pd_implemen+pd_body+pd_procvar+pd_notobjintf;
      handler  : nil;
      pocall   : [];
      pooption : [po_saveregisters];
      mutexclpocall : [pocall_internproc];
      mutexclpotype : [];
      mutexclpo     : [po_external]
    ),(
      idtok:_STATIC;
      pd_flags : pd_interface+pd_object+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_static;
      pocall   : [];
      pooption : [po_staticmethod];
      mutexclpocall : [pocall_inline,pocall_internproc];
      mutexclpotype : [potype_constructor,potype_destructor];
      mutexclpo     : [po_external,po_interrupt,po_exports]
    ),(
      idtok:_STDCALL;
      pd_flags : pd_interface+pd_implemen+pd_body+pd_procvar;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_stdcall;
      pocall   : [pocall_stdcall];
      pooption : [po_savestdregs];
      mutexclpocall : [pocall_leftright,pocall_cdecl,pocall_cppdecl,
        pocall_inline,pocall_internproc,pocall_safecall];
      mutexclpotype : [];
      mutexclpo     : [po_external]
    ),(
      idtok:_SYSCALL;
      pd_flags : pd_interface+pd_implemen+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_syscall;
      pocall   : [pocall_palmossyscall,pocall_cdecl,pocall_clearstack];
      pooption : [];
      mutexclpocall : [pocall_cdecl,pocall_cppdecl,pocall_inline,
        pocall_internproc,pocall_leftright];
      mutexclpotype : [];
      mutexclpo     : [po_external,po_assembler,po_interrupt,po_exports]
    ),(
      idtok:_SYSTEM;
      pd_flags : pd_implemen+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_system;
      pocall   : [pocall_clearstack];
      pooption : [];
      mutexclpocall : [pocall_leftright,pocall_inline,pocall_cdecl,
        pocall_internproc,pocall_cppdecl];
      mutexclpotype : [];
      mutexclpo     : [po_external,po_assembler,po_interrupt]
    ),(
      idtok:_VIRTUAL;
      pd_flags : pd_interface+pd_object+pd_notobjintf;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_virtual;
      pocall   : [];
      pooption : [po_virtualmethod];
      mutexclpocall : [pocall_inline,pocall_internproc];
      mutexclpotype : [];
      mutexclpo     : [po_external,po_interrupt,po_exports]
    ),(
      idtok:_CPPDECL;
      pd_flags : pd_interface+pd_implemen+pd_body+pd_procvar;
      handler  : {$ifdef FPCPROCVAR}@{$endif}pd_cppdecl;
      pocall   : [pocall_cppdecl,pocall_clearstack];
      pooption : [po_savestdregs];
      mutexclpocall : [pocall_cdecl,pocall_internproc,pocall_leftright,pocall_inline];
      mutexclpotype : [];
      mutexclpo     : [po_assembler,po_external]
    ),(
      idtok:_VARARGS;
      pd_flags : pd_interface+pd_implemen+pd_procvar;
      handler  : nil;
      pocall   : [];
      pooption : [po_varargs];
      mutexclpocall : [pocall_internproc,pocall_stdcall,pocall_register,
                       pocall_leftright,pocall_inline];
      mutexclpotype : [];
      mutexclpo     : [po_assembler,po_interrupt]
    ),(
      idtok:_COMPILERPROC;
      pd_flags : pd_interface+pd_implemen+pd_body+pd_notobjintf;
      handler  : nil;
      pocall   : [pocall_compilerproc];
      pooption : [];
      mutexclpocall : [];
      mutexclpotype : [];
      mutexclpo     : [po_interrupt]
    )
   );


    function is_proc_directive(tok:ttoken):boolean;
      var
        i : longint;
      begin
        is_proc_directive:=false;
        for i:=1 to num_proc_directives do
         if proc_direcdata[i].idtok=idtoken then
          begin
            is_proc_directive:=true;
            exit;
          end;
      end;


    function parse_proc_direc(var pdflags:word):boolean;
      {
        Parse the procedure directive, returns true if a correct directive is found
      }
      var
        p     : longint;
        found : boolean;
        name  : string;
      begin
        parse_proc_direc:=false;
        name:=pattern;
        found:=false;

      { Hint directive? Then exit immediatly }
        if (m_hintdirective in aktmodeswitches) then
         begin
           case idtoken of
             _LIBRARY,
             _PLATFORM,
             _DEPRECATED :
               exit;
           end;
         end;

      { retrieve data for directive if found }
        for p:=1 to num_proc_directives do
         if proc_direcdata[p].idtok=idtoken then
          begin
            found:=true;
            break;
          end;

      { Check if the procedure directive is known }
        if not found then
         begin
            { parsing a procvar type the name can be any
              next variable !! }
            if (pdflags and (pd_procvar or pd_object))=0 then
              Message1(parser_w_unknown_proc_directive_ignored,name);
            exit;
         end;

        { static needs a special treatment }
        if (idtoken=_STATIC) and not (cs_static_keyword in aktmoduleswitches) then
          exit;

      { Conflicts between directives ? }
        if (aktprocsym.definition.proctypeoption in proc_direcdata[p].mutexclpotype) or
           ((aktprocsym.definition.proccalloptions*proc_direcdata[p].mutexclpocall)<>[]) or
           ((aktprocsym.definition.procoptions*proc_direcdata[p].mutexclpo)<>[]) then
         begin
           Message1(parser_e_proc_dir_conflict,name);
           exit;
         end;

        if aktprocsym.definition.deftype=procdef then
         begin
           { Check if the directive is only for objects }
           if ((proc_direcdata[p].pd_flags and pd_object)<>0) and
              not assigned(aktprocsym.definition._class) then
            exit;

           { check if method and directive not for object public }
           if ((proc_direcdata[p].pd_flags and pd_notobject)<>0) and
              assigned(aktprocsym.definition._class) then
            exit;

           { check if method and directive not for interface }
           if ((proc_direcdata[p].pd_flags and pd_notobjintf)<>0) and
              is_interface(aktprocsym.definition._class) then
            exit;
         end;

      { consume directive, and turn flag on }
        consume(token);
        parse_proc_direc:=true;

      { Check the pd_flags if the directive should be allowed }
        if ((pdflags and pd_interface)<>0) and
           ((proc_direcdata[p].pd_flags and pd_interface)=0) then
          begin
            Message1(parser_e_proc_dir_not_allowed_in_interface,name);
            exit;
          end;
        if ((pdflags and pd_implemen)<>0) and
           ((proc_direcdata[p].pd_flags and pd_implemen)=0) then
          begin
            Message1(parser_e_proc_dir_not_allowed_in_implementation,name);
            exit;
          end;
        if ((pdflags and pd_procvar)<>0) and
           ((proc_direcdata[p].pd_flags and pd_procvar)=0) then
          begin
            Message1(parser_e_proc_dir_not_allowed_in_procvar,name);
            exit;
          end;

      { Return the new pd_flags }
        if (proc_direcdata[p].pd_flags and pd_body)=0 then
          pdflags:=pdflags and (not pd_body);
        if (proc_direcdata[p].pd_flags and pd_global)<>0 then
          pdflags:=pdflags or pd_global;

      { Add the correct flag }
        aktprocsym.definition.proccalloptions:=aktprocsym.definition.proccalloptions+proc_direcdata[p].pocall;
        aktprocsym.definition.procoptions:=aktprocsym.definition.procoptions+proc_direcdata[p].pooption;

       { Adjust positions of args for cdecl or stdcall }
         if (aktprocsym.definition.deftype=procdef) and
            (([pocall_cdecl,pocall_cppdecl,pocall_stdcall]*aktprocsym.definition.proccalloptions)<>[]) then
           tparasymtable(aktprocsym.definition.parast).set_alignment(target_info.size_of_longint);

      { Call the handler }
        if pointer({$ifndef FPCPROCVAR}@{$endif}proc_direcdata[p].handler)<>nil then
          proc_direcdata[p].handler{$ifdef FPCPROCVAR}(){$endif};
      end;


    procedure parse_proc_directives(var pdflags:word);
      {
        Parse the procedure directives. It does not matter if procedure directives
        are written using ;procdir; or ['procdir'] syntax.
      }
      var
        res : boolean;
      begin
        while token in [_ID,_LECKKLAMMER] do
         begin
           if try_to_consume(_LECKKLAMMER) then
            begin
              repeat
                parse_proc_direc(pdflags);
              until not try_to_consume(_COMMA);
              consume(_RECKKLAMMER);
              { we always expect at least '[];' }
              res:=true;
            end
           else
            res:=parse_proc_direc(pdflags);
         { A procedure directive normally followed by a semicolon, but in
           a const section we should stop when _EQUAL is found }
           if res then
            begin
              if (block_type=bt_const) and
                 (token=_EQUAL) then
               break;
              { support procedure proc;stdcall export; in Delphi mode only }
              if not((m_delphi in aktmodeswitches) and
                     is_proc_directive(token)) then
               consume(_SEMICOLON);
            end
           else
            break;
         end;
      end;


    procedure parse_var_proc_directives(var sym : tsym);
      var
        pdflags : word;
        oldsym  : tprocsym;
        pd      : tabstractprocdef;
      begin
        oldsym:=aktprocsym;
        pdflags:=pd_procvar;
        { we create a temporary aktprocsym to read the directives }
        aktprocsym:=tprocsym.create(sym.name);
        case sym.typ of
          varsym :
            pd:=tabstractprocdef(tvarsym(sym).vartype.def);
          typedconstsym :
            pd:=tabstractprocdef(ttypedconstsym(sym).typedconsttype.def);
          typesym :
            pd:=tabstractprocdef(ttypesym(sym).restype.def);
          else
            internalerror(994932432);
        end;
        if pd.deftype<>procvardef then
         internalerror(994932433);
        tabstractprocdef(aktprocsym.definition):=pd;
        { names should never be used anyway }
        inc(lexlevel);
        parse_proc_directives(pdflags);
        dec(lexlevel);
        aktprocsym.definition:=nil;
        aktprocsym.free;
        aktprocsym:=oldsym;
      end;


    procedure parse_object_proc_directives(var sym : tprocsym);
      var
        pdflags : word;
      begin
        pdflags:=pd_object;
        inc(lexlevel);
        parse_proc_directives(pdflags);
        dec(lexlevel);
        if (po_containsself in aktprocsym.definition.procoptions) and
           (([po_msgstr,po_msgint]*aktprocsym.definition.procoptions)=[]) then
          Message(parser_e_self_in_non_message_handler);
      end;


    function check_identical_proc(var p : tprocdef) : boolean;
      {
        Search for idendical definitions,
        if there is a forward, then kill this.

        Returns the result of the forward check.

        Removed from unter_dec to keep the source readable
      }
      var
        hd,pd : tprocdef;
        ad,fd : tsym;
      begin
        check_identical_proc:=false;
        p:=nil;
        pd:=aktprocsym.definition;
        if assigned(pd) then
         begin
         { Is there an overload/forward ? }
           if assigned(pd.nextoverloaded) then
            begin
            { walk the procdef list }
              while (assigned(pd)) and (assigned(pd.nextoverloaded)) do
               begin
                 hd:=pd.nextoverloaded;

                 { check the parameters, for delphi/tp it is possible to
                   leave the parameters away in the implementation (forwarddef=false).
                   But for an overload declared function this is not allowed }
                 if { check if empty implementation arguments match is allowed }
                    (
                     not(m_repeat_forward in aktmodeswitches) and
                     (aktprocsym.definition.maxparacount=0) and
                     not(aktprocsym.definition.forwarddef) and
                     not(po_overload in hd.procoptions)
                    ) or
                    { check arguments }
                    (
                     equal_paras(aktprocsym.definition.para,hd.para,cp_none) and
                     { for operators equal_paras is not enough !! }
                     ((aktprocsym.definition.proctypeoption<>potype_operator) or (optoken<>_ASSIGNMENT) or
                      is_equal(hd.rettype.def,aktprocsym.definition.rettype.def))
                    ) then
                   begin
                     if not equal_paras(aktprocsym.definition.para,hd.para,cp_all) and
                        ((m_repeat_forward in aktmodeswitches) or
                         (aktprocsym.definition.maxparacount>0)) then
                       begin
                          MessagePos1(aktprocsym.definition.fileinfo,parser_e_header_dont_match_forward,
                                      aktprocsym.definition.fullprocname);
                          exit;
                       end;
                     if hd.forwarddef then
                     { remove the forward definition  but don't delete it,      }
                     { the symtable is the owner !!  }
                       begin
                       { Check if the procedure type and return type are correct }
                         if (hd.proctypeoption<>aktprocsym.definition.proctypeoption) or
                            (not(is_equal(hd.rettype.def,aktprocsym.definition.rettype.def)) and
                            (m_repeat_forward in aktmodeswitches)) then
                           begin
                             MessagePos1(aktprocsym.definition.fileinfo,parser_e_header_dont_match_forward,
                                         aktprocsym.definition.fullprocname);
                             exit;
                           end;
                         { Check calling convention, no check for internconst,internproc which
                           are only defined in interface or implementation }
                         if (hd.proccalloptions-[pocall_internconst,pocall_internproc]<>
                             aktprocsym.definition.proccalloptions-[pocall_internconst,pocall_internproc]) then
                          begin
                            { only trigger an error, becuase it doesn't hurt, for delphi check
                              if the current implementation has no proccalloptions, then
                              take the options from the interface }
                            if (m_delphi in aktmodeswitches) then
                             begin
                               if (aktprocsym.definition.proccalloptions=[]) then
                                aktprocsym.definition.proccalloptions:=hd.proccalloptions
                               else
                                MessagePos(aktprocsym.definition.fileinfo,parser_e_call_convention_dont_match_forward);
                             end
                            else
                             MessagePos(aktprocsym.definition.fileinfo,parser_e_call_convention_dont_match_forward);
                            { set the mangledname to the interface name so it doesn't trigger
                              the Note about different manglednames (PFV) }
                            aktprocsym.definition.setmangledname(hd.mangledname);
                          end;
                         { manglednames are equal? }
                         hd.count:=false;
                         if (m_repeat_forward in aktmodeswitches) or
                            aktprocsym.definition.haspara then
                          begin
                            if (hd.mangledname<>aktprocsym.definition.mangledname) then
                             begin
                               if not(po_external in aktprocsym.definition.procoptions) then
                                 MessagePos2(aktprocsym.definition.fileinfo,parser_n_interface_name_diff_implementation_name,hd.mangledname,
                                   aktprocsym.definition.mangledname);
                             { reset the mangledname of the interface part to be sure }
                             { this is wrong because the mangled name might have been used already !! }
                                if hd.is_used then
                                  renameasmsymbol(hd.mangledname,aktprocsym.definition.mangledname);
                                hd.setmangledname(aktprocsym.definition.mangledname);
                             end
                            else
                             begin
                             { If mangled names are equal, therefore    }
                             { they have the same number of parameters  }
                             { Therefore we can check the name of these }
                             { parameters...                      }
                               if hd.forwarddef and aktprocsym.definition.forwarddef then
                                 begin
                                   MessagePos1(aktprocsym.definition.fileinfo,
                                               parser_e_function_already_declared_public_forward,
                                               aktprocsym.definition.fullprocname);
                                   check_identical_proc:=true;
                                 { Remove other forward from the list to reduce errors }
                                   pd.nextoverloaded:=pd.nextoverloaded.nextoverloaded;
                                   exit;
                                 end;
                               { both symtables are in the same order from left to right }
                               ad:=tsym(hd.parast.symindex.first);
                               fd:=tsym(aktprocsym.definition.parast.symindex.first);
                               while assigned(ad) and assigned(fd) do
                                begin
                                  if ad.name<>fd.name then
                                   begin
                                     MessagePos3(aktprocsym.definition.fileinfo,parser_e_header_different_var_names,
                                                 aktprocsym.name,ad.name,fd.name);
                                     break;
                                   end;
                                  ad:=tsym(ad.indexnext);
                                  fd:=tsym(fd.indexnext);
                                end;
                             end;
                          end;
                       { also the para_offset }
                         hd.parast.address_fixup:=aktprocsym.definition.parast.address_fixup;
                         hd.count:=true;

                       { remove pd.nextoverloaded from the list }
                       { and add aktprocsym.definition }
                         pd.nextoverloaded:=pd.nextoverloaded.nextoverloaded;
                         hd.nextoverloaded:=aktprocsym.definition.nextoverloaded;
                       { Alert! All fields of aktprocsym.definition that are modified
                         by the procdir handlers must be copied here!.}
                         hd.forwarddef:=false;
                         hd.hasforward:=true;
                         hd.proccalloptions:=hd.proccalloptions + aktprocsym.definition.proccalloptions;
                         hd.procoptions:=hd.procoptions + aktprocsym.definition.procoptions;
                         if aktprocsym.definition.extnumber=-1 then
                           aktprocsym.definition.extnumber:=hd.extnumber
                         else
                           if hd.extnumber=-1 then
                             hd.extnumber:=aktprocsym.definition.extnumber;
                         { copy all aliasnames }
                         while not aktprocsym.definition.aliasnames.empty do
                          hd.aliasnames.insert(aktprocsym.definition.aliasnames.getfirst);
                         if pd=aktprocsym.definition then
                           p:=nil
                         else
                           p:=pd;
                         aktprocsym.definition:=hd;
                         { for compilerproc defines we need to rename and update the
                           mangledname }
                         if (pocall_compilerproc in aktprocsym.definition.proccalloptions) then
                          begin
                            { rename to lowercase so users can't access it }
                            aktprocsym.owner.rename(aktprocsym.name,lower(aktprocsym.name));
                            { also update the realname that is stored in the ppu }
                            stringdispose(aktprocsym._realname);
                            aktprocsym._realname:=stringdup('$'+aktprocsym.name);
                            aktprocsym.definition.setmangledname(aktprocsym.name);
                          end;
                         check_identical_proc:=true;
                         break;
                       end
                     else
                     { abstract methods aren't forward defined, but this }
                     { needs another error message                   }
                       if (po_abstractmethod in pd.nextoverloaded.procoptions) then
                          MessagePos(aktprocsym.definition.fileinfo,parser_e_abstract_no_definition)
                       else
                          MessagePos(aktprocsym.definition.fileinfo,parser_e_overloaded_have_same_parameters);
                       break;
                   end;

                 { check for allowing overload directive }
                 if not(m_fpc in aktmodeswitches) then
                  begin
                    { overload directive turns on overloading }
                    if ((po_overload in aktprocsym.definition.procoptions) or
                        (po_overload in hd.procoptions)) then
                     begin
                       { check if all procs have overloading, but not if the proc was
                         already declared forward, then the check is already done }
                       if not(hd.hasforward or
                              (aktprocsym.definition.forwarddef<>hd.forwarddef) or
                              ((po_overload in aktprocsym.definition.procoptions) and
                               (po_overload in hd.procoptions))) then
                        begin
                          MessagePos1(aktprocsym.definition.fileinfo,parser_e_no_overload_for_all_procs,aktprocsym.realname);
                          break;
                        end;
                     end
                    else
                     begin
                       if not(hd.forwarddef) then
                        begin
                          MessagePos(aktprocsym.definition.fileinfo,parser_e_procedure_overloading_is_off);
                          break;
                        end;
                     end;
                  end;

                 { try next overloaded }
                 pd:=pd.nextoverloaded;
               end;
            end
           else
            begin
            { there is no overloaded, so its always identical with itself }
              check_identical_proc:=true;
            end;
         end;
      { insert otsym only in the right symtable }
        if ((procinfo^.flags and pi_operator)<>0) and assigned(otsym)
           and not parse_only then
          begin
            if ret_in_param(aktprocsym.definition.rettype.def) then
              begin
                tprocdef(aktprocsym.definition).parast.insert(otsym);
              { this increases the data size }
              { correct this to get the right ret $value }
                dec(tprocdef(aktprocsym.definition).parast.datasize,
                    align(otsym.getpushsize,tprocdef(aktprocsym.definition).parast.dataalignment));
                { this allows to read the funcretoffset }
                otsym.address:=-4;
                otsym.varspez:=vs_var;
              end
            else
              tprocdef(aktprocsym.definition).localst.insert(otsym);
          end;
      end;


end.
{
  $Log$
  Revision 1.34  2001-08-22 21:16:21  florian
    * some interfaces related problems regarding
      mapping of interface implementions fixed

  Revision 1.33  2001/08/19 21:11:20  florian
    * some bugs fix:
      - overload; with external procedures fixed
      - better selection of routine to do an overloaded
        type case
      - ... some more

  Revision 1.32  2001/08/19 11:22:23  peter
    * palmos support from v10 merged

  Revision 1.31  2001/08/05 13:18:50  peter
    * turn pocall_inline off when inline is not supported

  Revision 1.30  2001/08/01 15:07:29  jonas
    + "compilerproc" directive support, which turns both the public and mangled
      name to lowercase(declaration_name). This prevents a normal user from
      accessing the routine, but they can still be easily looked up within
      the compiler. This is used for helper procedures and should facilitate
      the writing of more processor independent code in the code generator
      itself (mostly written by Peter)
    + new "createintern" constructor for tcal nodes to create a call to
      helper exported using the "compilerproc" directive
    + support for high(dynamic_array) using the the above new things
    + definition of 'HASCOMPILERPROC' symbol (to be able to check in the
      compiler and rtl whether the "compilerproc" directive is supported)

  Revision 1.29  2001/07/09 21:11:14  peter
    * fixed overload checking for delphi. Empty parameters are only
      allowed in implementation and not when the forward declaration
      contains overload directive

  Revision 1.28  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 1.27  2001/06/04 18:12:26  peter
    * fixed crash with procvar directive parsing. Be carefull as the procvar
      directive parsing uses aktprocsym.definition that is a tprocdef, but
      for procvar the type is tprocvardef. So some fields are not available

  Revision 1.26  2001/06/04 11:53:13  peter
    + varargs directive

  Revision 1.25  2001/06/03 21:57:36  peter
    + hint directive parsing support

  Revision 1.24  2001/05/08 21:06:31  florian
    * some more support for widechars commited especially
      regarding type casting and constants

  Revision 1.23  2001/05/08 14:32:58  jonas
    * fixed bug for overloaded operators with a return type that has a size
      which isn't a multiple of the target_os.stackalignment (main branch
      patch from Peter)

  Revision 1.22  2001/05/04 15:52:03  florian
    * some Delphi incompatibilities fixed:
       - out, dispose and new can be used as idenfiers now
       - const p = apointerype(nil); is supported now
    + support for const p = apointertype(pointer(1234)); added

  Revision 1.21  2001/04/18 22:01:57  peter
    * registration of targets and assemblers

  Revision 1.20  2001/04/13 20:05:16  peter
    * better check for globalsymtable

  Revision 1.19  2001/04/13 18:03:16  peter
    * give error with local external procedure

  Revision 1.18  2001/04/13 01:22:11  peter
    * symtable change to classes
    * range check generation and errors fixed, make cycle DEBUG=1 works
    * memory leaks fixed

  Revision 1.17  2001/04/04 22:43:52  peter
    * remove unnecessary calls to firstpass

  Revision 1.16  2001/04/02 21:20:33  peter
    * resulttype rewrite

  Revision 1.15  2001/03/24 12:18:11  florian
    * procedure p(); is now allowed in all modes except TP

  Revision 1.14  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 1.13  2001/03/11 22:58:50  peter
    * getsym redesign, removed the globals srsym,srsymtable

  Revision 1.12  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 1.11  2001/01/08 21:40:26  peter
    * fixed crash with unsupported token overloading

  Revision 1.10  2000/12/25 00:07:27  peter
    + new tlinkedlist class (merge of old tstringqueue,tcontainer and
      tlinkedlist objects)

  Revision 1.9  2000/11/29 00:30:35  florian
    * unused units removed from uses clause
    * some changes for widestrings

  Revision 1.8  2000/11/26 23:45:34  florian
    * pascal modifier in interfaces of units works now

  Revision 1.7  2000/11/06 20:30:55  peter
    * more fixes to get make cycle working

  Revision 1.6  2000/11/04 14:25:20  florian
    + merged Attila's changes for interfaces, not tested yet

  Revision 1.5  2000/11/01 23:04:37  peter
    * tprocdef.fullprocname added for better casesensitve writing of
      procedures

  Revision 1.4  2000/10/31 22:02:49  peter
    * symtable splitted, no real code changes

  Revision 1.3  2000/10/21 18:16:11  florian
    * a lot of changes:
       - basic dyn. array support
       - basic C++ support
       - some work for interfaces done
       ....

  Revision 1.2  2000/10/15 07:47:51  peter
    * unit names and procedure names are stored mixed case

  Revision 1.1  2000/10/14 10:14:51  peter
    * moehrendorf oct 2000 rewrite
}