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769 lines
29 KiB
ObjectPascal
769 lines
29 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2002 by Florian Klaempfl
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Does object types for Free Pascal
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit pdecobj;
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{$i fpcdefs.inc}
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interface
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uses
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globtype,symtype,symdef;
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{ parses a object declaration }
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function object_dec(const n : stringid;fd : tobjectdef) : tdef;
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implementation
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uses
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cutils,cclasses,
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globals,verbose,systems,tokens,
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symconst,symbase,symsym,
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node,nld,nmem,ncon,ncnv,ncal,
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scanner,
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pbase,pexpr,pdecsub,pdecvar,ptype
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;
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const
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{ Please leave this here, this module should NOT use
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these variables.
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Declaring it as string here results in an error when compiling (PFV) }
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current_procinfo = 'error';
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function object_dec(const n : stringid;fd : tobjectdef) : tdef;
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{ this function parses an object or class declaration }
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var
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there_is_a_destructor : boolean;
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classtype : tobjectdeftype;
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childof : tobjectdef;
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aktclass : tobjectdef;
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function constructor_head:tprocdef;
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var
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pd : tprocdef;
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begin
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consume(_CONSTRUCTOR);
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{ must be at same level as in implementation }
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parse_proc_head(aktclass,potype_constructor,pd);
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if not assigned(pd) then
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begin
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consume(_SEMICOLON);
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exit;
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end;
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if (cs_constructor_name in aktglobalswitches) and
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(pd.procsym.name<>'INIT') then
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Message(parser_e_constructorname_must_be_init);
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consume(_SEMICOLON);
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include(aktclass.objectoptions,oo_has_constructor);
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{ Set return type, class constructors return the
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created instance, object constructors return boolean }
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if is_class(pd._class) then
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pd.rettype.setdef(pd._class)
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else
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pd.rettype:=booltype;
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constructor_head:=pd;
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end;
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procedure property_dec;
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var
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p : tpropertysym;
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begin
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{ check for a class }
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if not((is_class_or_interface(aktclass)) or
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((m_delphi in aktmodeswitches) and (is_object(aktclass)))) then
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Message(parser_e_syntax_error);
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consume(_PROPERTY);
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p:=read_property_dec(aktclass);
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consume(_SEMICOLON);
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if try_to_consume(_DEFAULT) then
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begin
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if oo_has_default_property in aktclass.objectoptions then
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message(parser_e_only_one_default_property);
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include(aktclass.objectoptions,oo_has_default_property);
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include(p.propoptions,ppo_defaultproperty);
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if not(ppo_hasparameters in p.propoptions) then
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message(parser_e_property_need_paras);
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consume(_SEMICOLON);
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end;
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{ hint directives, these can be separated by semicolons here,
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that needs to be handled here with a loop (PFV) }
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while try_consume_hintdirective(p.symoptions) do
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Consume(_SEMICOLON);
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end;
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function destructor_head:tprocdef;
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var
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pd : tprocdef;
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begin
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consume(_DESTRUCTOR);
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parse_proc_head(aktclass,potype_destructor,pd);
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if not assigned(pd) then
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begin
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consume(_SEMICOLON);
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exit;
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end;
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if (cs_constructor_name in aktglobalswitches) and
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(pd.procsym.name<>'DONE') then
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Message(parser_e_destructorname_must_be_done);
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if not(pd.maxparacount=0) and
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(m_fpc in aktmodeswitches) then
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Message(parser_e_no_paras_for_destructor);
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consume(_SEMICOLON);
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include(aktclass.objectoptions,oo_has_destructor);
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{ no return value }
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pd.rettype:=voidtype;
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destructor_head:=pd;
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end;
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var
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pcrd : tclassrefdef;
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tt : ttype;
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old_object_option : tsymoptions;
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oldparse_only : boolean;
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storetypecanbeforward : boolean;
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procedure setclassattributes;
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begin
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{ publishable }
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if classtype in [odt_interfacecom,odt_class] then
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begin
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aktclass.objecttype:=classtype;
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if (cs_generate_rtti in aktlocalswitches) or
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(assigned(aktclass.childof) and
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(oo_can_have_published in aktclass.childof.objectoptions)) then
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begin
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include(aktclass.objectoptions,oo_can_have_published);
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{ in "publishable" classes the default access type is published }
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current_object_option:=[sp_published];
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end;
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end;
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end;
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procedure setclassparent;
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begin
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if assigned(fd) then
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aktclass:=fd
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else
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aktclass:=tobjectdef.create(classtype,n,nil);
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{ is the current class tobject? }
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{ so you could define your own tobject }
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if (cs_compilesystem in aktmoduleswitches) and (classtype=odt_class) and (upper(n)='TOBJECT') then
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class_tobject:=aktclass
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else if (cs_compilesystem in aktmoduleswitches) and (classtype=odt_interfacecom) and (upper(n)='IUNKNOWN') then
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interface_iunknown:=aktclass
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else
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begin
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case classtype of
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odt_class:
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childof:=class_tobject;
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odt_interfacecom:
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childof:=interface_iunknown;
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end;
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if (oo_is_forward in childof.objectoptions) then
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Message1(parser_e_forward_declaration_must_be_resolved,childof.objrealname^);
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aktclass.set_parent(childof);
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end;
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end;
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procedure setinterfacemethodoptions;
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var
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i: longint;
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defs: TIndexArray;
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pd: tdef;
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begin
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include(aktclass.objectoptions,oo_has_virtual);
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defs:=aktclass.symtable.defindex;
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for i:=1 to defs.count do
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begin
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pd:=tdef(defs.search(i));
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if pd.deftype=procdef then
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begin
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tprocdef(pd).extnumber:=aktclass.lastvtableindex;
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inc(aktclass.lastvtableindex);
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include(tprocdef(pd).procoptions,po_virtualmethod);
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tprocdef(pd).forwarddef:=false;
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end;
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end;
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end;
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function readobjecttype : boolean;
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begin
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readobjecttype:=true;
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{ distinguish classes and objects }
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case token of
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_OBJECT:
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begin
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classtype:=odt_object;
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consume(_OBJECT)
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end;
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_CPPCLASS:
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begin
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classtype:=odt_cppclass;
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consume(_CPPCLASS);
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end;
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_INTERFACE:
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begin
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{ need extra check here since interface is a keyword
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in all pascal modes }
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if not(m_class in aktmodeswitches) then
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Message(parser_f_need_objfpc_or_delphi_mode);
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if aktinterfacetype=it_interfacecom then
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classtype:=odt_interfacecom
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else {it_interfacecorba}
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classtype:=odt_interfacecorba;
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consume(_INTERFACE);
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{ forward declaration }
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if not(assigned(fd)) and (token=_SEMICOLON) then
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begin
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{ also anonym objects aren't allow (o : object a : longint; end;) }
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if n='' then
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Message(parser_f_no_anonym_objects);
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aktclass:=tobjectdef.create(classtype,n,nil);
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if (cs_compilesystem in aktmoduleswitches) and
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(classtype=odt_interfacecom) and (upper(n)='IUNKNOWN') then
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interface_iunknown:=aktclass;
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include(aktclass.objectoptions,oo_is_forward);
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object_dec:=aktclass;
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typecanbeforward:=storetypecanbeforward;
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readobjecttype:=false;
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exit;
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end;
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end;
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_CLASS:
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begin
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classtype:=odt_class;
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consume(_CLASS);
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if not(assigned(fd)) and
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(token=_OF) and
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{ Delphi only allows class of in type blocks.
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Note that when parsing the type of a variable declaration
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the blocktype is bt_type so the check for typecanbeforward
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is also necessary (PFV) }
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(((block_type=bt_type) and typecanbeforward) or
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not(m_delphi in aktmodeswitches)) then
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begin
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{ a hack, but it's easy to handle }
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{ class reference type }
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consume(_OF);
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single_type(tt,typecanbeforward);
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{ accept hp1, if is a forward def or a class }
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if (tt.def.deftype=forwarddef) or
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is_class(tt.def) then
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begin
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pcrd:=tclassrefdef.create(tt);
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object_dec:=pcrd;
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end
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else
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begin
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object_dec:=generrortype.def;
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Message1(type_e_class_type_expected,generrortype.def.typename);
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end;
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typecanbeforward:=storetypecanbeforward;
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readobjecttype:=false;
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exit;
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end
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{ forward class }
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else if not(assigned(fd)) and (token=_SEMICOLON) then
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begin
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{ also anonym objects aren't allow (o : object a : longint; end;) }
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if n='' then
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Message(parser_f_no_anonym_objects);
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aktclass:=tobjectdef.create(odt_class,n,nil);
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if (cs_compilesystem in aktmoduleswitches) and (upper(n)='TOBJECT') then
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class_tobject:=aktclass;
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aktclass.objecttype:=odt_class;
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include(aktclass.objectoptions,oo_is_forward);
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{ all classes must have a vmt !! at offset zero }
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if not(oo_has_vmt in aktclass.objectoptions) then
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aktclass.insertvmt;
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object_dec:=aktclass;
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typecanbeforward:=storetypecanbeforward;
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readobjecttype:=false;
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exit;
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end;
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end;
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else
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begin
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classtype:=odt_class; { this is error but try to recover }
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consume(_OBJECT);
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end;
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end;
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end;
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procedure handleimplementedinterface(implintf : tobjectdef);
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begin
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if not is_interface(implintf) then
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begin
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Message1(type_e_interface_type_expected,implintf.typename);
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exit;
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end;
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if aktclass.implementedinterfaces.searchintf(implintf)<>-1 then
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Message1(sym_e_duplicate_id,implintf.name)
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else
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begin
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{ allocate and prepare the GUID only if the class
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implements some interfaces.
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}
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if aktclass.implementedinterfaces.count = 0 then
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aktclass.prepareguid;
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aktclass.implementedinterfaces.addintf(implintf);
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end;
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end;
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procedure readimplementedinterfaces;
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var
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tt : ttype;
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begin
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while try_to_consume(_COMMA) do
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begin
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id_type(tt,false);
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if (tt.def.deftype<>objectdef) then
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begin
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Message1(type_e_interface_type_expected,tt.def.typename);
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continue;
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end;
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handleimplementedinterface(tobjectdef(tt.def));
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end;
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end;
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procedure readinterfaceiid;
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var
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p : tnode;
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valid : boolean;
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begin
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p:=comp_expr(true);
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if p.nodetype=stringconstn then
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begin
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stringdispose(aktclass.iidstr);
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aktclass.iidstr:=stringdup(strpas(tstringconstnode(p).value_str)); { or upper? }
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p.free;
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valid:=string2guid(aktclass.iidstr^,aktclass.iidguid^);
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if (classtype=odt_interfacecom) and not assigned(aktclass.iidguid) and not valid then
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Message(parser_e_improper_guid_syntax);
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end
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else
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begin
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p.free;
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Message(parser_e_illegal_expression);
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end;
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end;
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procedure readparentclasses;
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var
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hp : tobjectdef;
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begin
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hp:=nil;
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{ reads the parent class }
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if try_to_consume(_LKLAMMER) then
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begin
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id_type(tt,false);
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childof:=tobjectdef(tt.def);
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if (not assigned(childof)) or
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(childof.deftype<>objectdef) then
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begin
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if assigned(childof) then
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Message1(type_e_class_type_expected,childof.typename);
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childof:=nil;
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aktclass:=tobjectdef.create(classtype,n,nil);
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end
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else
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begin
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{ a mix of class, interfaces, objects and cppclasses
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isn't allowed }
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case classtype of
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odt_class:
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if not(is_class(childof)) then
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begin
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if is_interface(childof) then
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begin
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{ we insert the interface after the child
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is set, see below
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}
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hp:=childof;
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childof:=class_tobject;
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end
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else
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Message(parser_e_mix_of_classes_and_objects);
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end;
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odt_interfacecorba,
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odt_interfacecom:
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if not(is_interface(childof)) then
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Message(parser_e_mix_of_classes_and_objects);
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odt_cppclass:
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if not(is_cppclass(childof)) then
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Message(parser_e_mix_of_classes_and_objects);
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odt_object:
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if not(is_object(childof)) then
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Message(parser_e_mix_of_classes_and_objects);
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end;
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{ the forward of the child must be resolved to get
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correct field addresses }
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if assigned(fd) then
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begin
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if (oo_is_forward in childof.objectoptions) then
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Message1(parser_e_forward_declaration_must_be_resolved,childof.objrealname^);
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aktclass:=fd;
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{ we must inherit several options !!
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this was missing !!
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all is now done in set_parent
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including symtable datasize setting PM }
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fd.set_parent(childof);
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end
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else
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aktclass:=tobjectdef.create(classtype,n,childof);
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if aktclass.objecttype=odt_class then
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begin
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if assigned(hp) then
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handleimplementedinterface(hp);
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readimplementedinterfaces;
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end;
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end;
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consume(_RKLAMMER);
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end
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{ if no parent class, then a class get tobject as parent }
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else if classtype in [odt_class,odt_interfacecom] then
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setclassparent
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else
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aktclass:=tobjectdef.create(classtype,n,nil);
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{ read GUID }
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if (classtype in [odt_interfacecom,odt_interfacecorba]) and
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try_to_consume(_LECKKLAMMER) then
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begin
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readinterfaceiid;
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consume(_RECKKLAMMER);
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end;
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end;
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procedure chkcpp(pd:tprocdef);
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begin
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if is_cppclass(pd._class) then
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begin
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pd.proccalloption:=pocall_cppdecl;
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pd.setmangledname(target_info.Cprefix+pd.cplusplusmangledname);
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end;
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end;
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|
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var
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pd : tprocdef;
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dummysymoptions : tsymoptions;
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begin
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old_object_option:=current_object_option;
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{ forward is resolved }
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if assigned(fd) then
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exclude(fd.objectoptions,oo_is_forward);
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{ objects and class types can't be declared local }
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if not(symtablestack.symtabletype in [globalsymtable,staticsymtable]) then
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Message(parser_e_no_local_objects);
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storetypecanbeforward:=typecanbeforward;
|
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{ for tp7 don't allow forward types }
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if (m_tp7 in aktmodeswitches) then
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typecanbeforward:=false;
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|
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if not(readobjecttype) then
|
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exit;
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|
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{ also anonym objects aren't allow (o : object a : longint; end;) }
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if n='' then
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Message(parser_f_no_anonym_objects);
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{ read list of parent classes }
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readparentclasses;
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{ default access is public }
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there_is_a_destructor:=false;
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current_object_option:=[sp_public];
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|
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{ set class flags and inherits published }
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setclassattributes;
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aktobjectdef:=aktclass;
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aktclass.symtable.next:=symtablestack;
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symtablestack:=aktclass.symtable;
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testcurobject:=1;
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curobjectname:=Upper(n);
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|
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{ short class declaration ? }
|
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if (classtype<>odt_class) or (token<>_SEMICOLON) then
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begin
|
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{ Parse componenten }
|
|
repeat
|
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case token of
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_ID :
|
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begin
|
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case idtoken of
|
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_PRIVATE :
|
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begin
|
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if is_interface(aktclass) then
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Message(parser_e_no_access_specifier_in_interfaces);
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consume(_PRIVATE);
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current_object_option:=[sp_private];
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include(aktclass.objectoptions,oo_has_private);
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|
end;
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_PROTECTED :
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|
begin
|
|
if is_interface(aktclass) then
|
|
Message(parser_e_no_access_specifier_in_interfaces);
|
|
consume(_PROTECTED);
|
|
current_object_option:=[sp_protected];
|
|
include(aktclass.objectoptions,oo_has_protected);
|
|
end;
|
|
_PUBLIC :
|
|
begin
|
|
if is_interface(aktclass) then
|
|
Message(parser_e_no_access_specifier_in_interfaces);
|
|
consume(_PUBLIC);
|
|
current_object_option:=[sp_public];
|
|
end;
|
|
_PUBLISHED :
|
|
begin
|
|
{ we've to check for a pushlished section in non- }
|
|
{ publishable classes later, if a real declaration }
|
|
{ this is the way, delphi does it }
|
|
if is_interface(aktclass) then
|
|
Message(parser_e_no_access_specifier_in_interfaces);
|
|
consume(_PUBLISHED);
|
|
current_object_option:=[sp_published];
|
|
end;
|
|
else
|
|
begin
|
|
if is_interface(aktclass) then
|
|
Message(parser_e_no_vars_in_interfaces);
|
|
|
|
if (sp_published in current_object_option) and
|
|
not(oo_can_have_published in aktclass.objectoptions) then
|
|
Message(parser_e_cant_have_published);
|
|
|
|
read_var_decs(false,true,false);
|
|
end;
|
|
end;
|
|
end;
|
|
_PROPERTY :
|
|
begin
|
|
property_dec;
|
|
end;
|
|
_PROCEDURE,
|
|
_FUNCTION,
|
|
_CLASS :
|
|
begin
|
|
if (sp_published in current_object_option) and
|
|
not(oo_can_have_published in aktclass.objectoptions) then
|
|
Message(parser_e_cant_have_published);
|
|
|
|
oldparse_only:=parse_only;
|
|
parse_only:=true;
|
|
pd:=parse_proc_dec(aktclass);
|
|
|
|
{ this is for error recovery as well as forward }
|
|
{ interface mappings, i.e. mapping to a method }
|
|
{ which isn't declared yet }
|
|
if assigned(pd) then
|
|
begin
|
|
parse_object_proc_directives(pd);
|
|
handle_calling_convention(pd);
|
|
|
|
{ add definition to procsym }
|
|
proc_add_definition(pd);
|
|
|
|
{ add procdef options to objectdef options }
|
|
if (po_msgint in pd.procoptions) then
|
|
include(aktclass.objectoptions,oo_has_msgint);
|
|
if (po_msgstr in pd.procoptions) then
|
|
include(aktclass.objectoptions,oo_has_msgstr);
|
|
if (po_virtualmethod in pd.procoptions) then
|
|
include(aktclass.objectoptions,oo_has_virtual);
|
|
|
|
chkcpp(pd);
|
|
end;
|
|
|
|
{ Support hint directives }
|
|
dummysymoptions:=[];
|
|
while try_consume_hintdirective(dummysymoptions) do
|
|
Consume(_SEMICOLON);
|
|
if assigned(pd) then
|
|
pd.symoptions:=pd.symoptions+dummysymoptions;
|
|
|
|
parse_only:=oldparse_only;
|
|
end;
|
|
_CONSTRUCTOR :
|
|
begin
|
|
if (sp_published in current_object_option) and
|
|
not(oo_can_have_published in aktclass.objectoptions) then
|
|
Message(parser_e_cant_have_published);
|
|
|
|
if not(sp_public in current_object_option) and
|
|
not(sp_published in current_object_option) then
|
|
Message(parser_w_constructor_should_be_public);
|
|
|
|
if is_interface(aktclass) then
|
|
Message(parser_e_no_con_des_in_interfaces);
|
|
|
|
oldparse_only:=parse_only;
|
|
parse_only:=true;
|
|
pd:=constructor_head;
|
|
parse_object_proc_directives(pd);
|
|
handle_calling_convention(pd);
|
|
|
|
{ add definition to procsym }
|
|
proc_add_definition(pd);
|
|
|
|
{ add procdef options to objectdef options }
|
|
if (po_virtualmethod in pd.procoptions) then
|
|
include(aktclass.objectoptions,oo_has_virtual);
|
|
chkcpp(pd);
|
|
|
|
{ Support hint directives }
|
|
dummysymoptions:=[];
|
|
while try_consume_hintdirective(dummysymoptions) do
|
|
Consume(_SEMICOLON);
|
|
if assigned(pd) then
|
|
pd.symoptions:=pd.symoptions+dummysymoptions;
|
|
|
|
parse_only:=oldparse_only;
|
|
end;
|
|
_DESTRUCTOR :
|
|
begin
|
|
if (sp_published in current_object_option) and
|
|
not(oo_can_have_published in aktclass.objectoptions) then
|
|
Message(parser_e_cant_have_published);
|
|
|
|
if there_is_a_destructor then
|
|
Message(parser_n_only_one_destructor);
|
|
|
|
if is_interface(aktclass) then
|
|
Message(parser_e_no_con_des_in_interfaces);
|
|
|
|
if not(sp_public in current_object_option) then
|
|
Message(parser_w_destructor_should_be_public);
|
|
|
|
there_is_a_destructor:=true;
|
|
oldparse_only:=parse_only;
|
|
parse_only:=true;
|
|
pd:=destructor_head;
|
|
parse_object_proc_directives(pd);
|
|
handle_calling_convention(pd);
|
|
|
|
{ add definition to procsym }
|
|
proc_add_definition(pd);
|
|
|
|
{ add procdef options to objectdef options }
|
|
if (po_virtualmethod in pd.procoptions) then
|
|
include(aktclass.objectoptions,oo_has_virtual);
|
|
|
|
chkcpp(pd);
|
|
|
|
{ Support hint directives }
|
|
dummysymoptions:=[];
|
|
while try_consume_hintdirective(dummysymoptions) do
|
|
Consume(_SEMICOLON);
|
|
if assigned(pd) then
|
|
pd.symoptions:=pd.symoptions+dummysymoptions;
|
|
|
|
parse_only:=oldparse_only;
|
|
end;
|
|
_END :
|
|
begin
|
|
consume(_END);
|
|
break;
|
|
end;
|
|
else
|
|
consume(_ID); { Give a ident expected message, like tp7 }
|
|
end;
|
|
until false;
|
|
end;
|
|
|
|
{ generate vmt space if needed }
|
|
if not(oo_has_vmt in aktclass.objectoptions) and
|
|
(([oo_has_virtual,oo_has_constructor,oo_has_destructor]*aktclass.objectoptions<>[]) or
|
|
(classtype in [odt_class])
|
|
) then
|
|
aktclass.insertvmt;
|
|
|
|
if is_interface(aktclass) then
|
|
setinterfacemethodoptions;
|
|
|
|
{ reset }
|
|
testcurobject:=0;
|
|
curobjectname:='';
|
|
typecanbeforward:=storetypecanbeforward;
|
|
{ restore old state }
|
|
symtablestack:=symtablestack.next;
|
|
aktobjectdef:=nil;
|
|
current_object_option:=old_object_option;
|
|
|
|
object_dec:=aktclass;
|
|
end;
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.85 2005-02-01 08:46:13 michael
|
|
* Patch from peter: fix macpas anonymous function procvar
|
|
|
|
Revision 1.84 2004/12/26 20:11:39 peter
|
|
* fix invalid typecast
|
|
|
|
Revision 1.83 2004/11/16 20:32:40 peter
|
|
* fixes for win32 mangledname
|
|
|
|
Revision 1.82 2004/10/15 09:14:17 mazen
|
|
- remove $IFDEF DELPHI and related code
|
|
- remove $IFDEF FPCPROCVAR and related code
|
|
|
|
Revision 1.81 2004/08/29 11:28:10 peter
|
|
allow published for constructors
|
|
|
|
Revision 1.80 2004/08/25 15:57:04 peter
|
|
* allow only 1 default property
|
|
|
|
Revision 1.79 2004/08/22 11:23:45 peter
|
|
* support hint directives in object declarations
|
|
|
|
Revision 1.78 2004/06/20 08:55:30 florian
|
|
* logs truncated
|
|
|
|
Revision 1.77 2004/06/16 20:07:09 florian
|
|
* dwarf branch merged
|
|
|
|
Revision 1.76.2.1 2004/04/28 19:55:52 peter
|
|
* new warning for ordinal-pointer when size is different
|
|
* fixed some cg_e_ messages to the correct section type_e_ or parser_e_
|
|
|
|
Revision 1.76 2004/02/26 16:13:25 peter
|
|
* fix crash when method is not declared in object declaration
|
|
* fix parsing of mapped interface functions
|
|
|
|
}
|