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fpc/compiler/pdecobj.pas

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{
Copyright (c) 1998-2002 by Florian Klaempfl
Does object types for Free Pascal
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 pdecobj;
{$i fpcdefs.inc}
interface
uses
cclasses,
globtype,symconst,symtype,symdef;
{ parses a object declaration }
function object_dec(objecttype:tobjecttyp;const n:tidstring;genericdef:tstoreddef;genericlist:TFPObjectList;fd : tobjectdef) : tobjectdef;
implementation
uses
cutils,
globals,verbose,systems,tokens,
symbase,symsym,symtable,
node,nld,nmem,ncon,ncnv,ncal,
fmodule,scanner,
pbase,pexpr,pdecsub,pdecvar,ptype,pdecl,ppu
;
const
{ Please leave this here, this module should NOT use
these variables.
Declaring it as string here results in an error when compiling (PFV) }
current_procinfo = 'error';
function class_constructor_head:tprocdef;
var
pd : tprocdef;
begin
result:=nil;
consume(_CONSTRUCTOR);
{ must be at same level as in implementation }
parse_proc_head(current_objectdef,potype_class_constructor,pd);
if not assigned(pd) then
begin
consume(_SEMICOLON);
exit;
end;
pd.calcparas;
if (pd.maxparacount>0) then
Message(parser_e_no_paras_for_class_constructor);
consume(_SEMICOLON);
include(current_objectdef.objectoptions,oo_has_class_constructor);
current_module.flags:=current_module.flags or uf_classinits;
{ no return value }
pd.returndef:=voidtype;
result:=pd;
end;
function constructor_head:tprocdef;
var
pd : tprocdef;
begin
result:=nil;
consume(_CONSTRUCTOR);
{ must be at same level as in implementation }
parse_proc_head(current_objectdef,potype_constructor,pd);
if not assigned(pd) then
begin
consume(_SEMICOLON);
exit;
end;
if (cs_constructor_name in current_settings.globalswitches) and
(pd.procsym.name<>'INIT') then
Message(parser_e_constructorname_must_be_init);
consume(_SEMICOLON);
include(current_objectdef.objectoptions,oo_has_constructor);
{ Set return type, class constructors return the
created instance, object constructors return boolean }
if is_class(pd._class) then
pd.returndef:=pd._class
else
{$ifdef CPU64bitaddr}
pd.returndef:=bool64type;
{$else CPU64bitaddr}
pd.returndef:=bool32type;
{$endif CPU64bitaddr}
result:=pd;
end;
procedure property_dec(is_classproperty:boolean);
var
p : tpropertysym;
begin
{ check for a class }
if not((is_class_or_interface_or_dispinterface(current_objectdef)) or
(not(m_tp7 in current_settings.modeswitches) and (is_object(current_objectdef)))) then
Message(parser_e_syntax_error);
consume(_PROPERTY);
p:=read_property_dec(is_classproperty, current_objectdef);
consume(_SEMICOLON);
if try_to_consume(_DEFAULT) then
begin
if oo_has_default_property in current_objectdef.objectoptions then
message(parser_e_only_one_default_property);
include(current_objectdef.objectoptions,oo_has_default_property);
include(p.propoptions,ppo_defaultproperty);
if not(ppo_hasparameters in p.propoptions) then
message(parser_e_property_need_paras);
if (token=_COLON) then
begin
Message(parser_e_field_not_allowed_here);
consume_all_until(_SEMICOLON);
end;
consume(_SEMICOLON);
end;
{ parse possible enumerator modifier }
if try_to_consume(_ENUMERATOR) then
begin
if (token = _ID) then
begin
if pattern='CURRENT' then
begin
if oo_has_enumerator_current in current_objectdef.objectoptions then
message(parser_e_only_one_enumerator_current);
if not p.propaccesslist[palt_read].empty then
begin
include(current_objectdef.objectoptions,oo_has_enumerator_current);
include(p.propoptions,ppo_enumerator_current);
end
else
Message(parser_e_enumerator_current_is_not_valid) // property has no reader
end
else
Message1(parser_e_invalid_enumerator_identifier, pattern);
consume(token);
end
else
Message(parser_e_enumerator_identifier_required);
consume(_SEMICOLON);
end;
{ hint directives, these can be separated by semicolons here,
that needs to be handled here with a loop (PFV) }
while try_consume_hintdirective(p.symoptions,p.deprecatedmsg) do
Consume(_SEMICOLON);
end;
function class_destructor_head:tprocdef;
var
pd : tprocdef;
begin
result:=nil;
consume(_DESTRUCTOR);
parse_proc_head(current_objectdef,potype_class_destructor,pd);
if not assigned(pd) then
begin
consume(_SEMICOLON);
exit;
end;
pd.calcparas;
if (pd.maxparacount>0) then
Message(parser_e_no_paras_for_class_destructor);
consume(_SEMICOLON);
include(current_objectdef.objectoptions,oo_has_class_destructor);
current_module.flags:=current_module.flags or uf_classinits;
{ no return value }
pd.returndef:=voidtype;
result:=pd;
end;
function destructor_head:tprocdef;
var
pd : tprocdef;
begin
result:=nil;
consume(_DESTRUCTOR);
parse_proc_head(current_objectdef,potype_destructor,pd);
if not assigned(pd) then
begin
consume(_SEMICOLON);
exit;
end;
if (cs_constructor_name in current_settings.globalswitches) and
(pd.procsym.name<>'DONE') then
Message(parser_e_destructorname_must_be_done);
pd.calcparas;
if not(pd.maxparacount=0) and
(m_fpc in current_settings.modeswitches) then
Message(parser_e_no_paras_for_destructor);
consume(_SEMICOLON);
include(current_objectdef.objectoptions,oo_has_destructor);
{ no return value }
pd.returndef:=voidtype;
result:=pd;
end;
procedure setinterfacemethodoptions;
var
i : longint;
def : tdef;
begin
include(current_objectdef.objectoptions,oo_has_virtual);
for i:=0 to current_objectdef.symtable.DefList.count-1 do
begin
def:=tdef(current_objectdef.symtable.DefList[i]);
if assigned(def) and
(def.typ=procdef) then
begin
include(tprocdef(def).procoptions,po_virtualmethod);
tprocdef(def).forwarddef:=false;
end;
end;
end;
procedure setobjcclassmethodoptions;
var
i : longint;
def : tdef;
begin
for i:=0 to current_objectdef.symtable.DefList.count-1 do
begin
def:=tdef(current_objectdef.symtable.DefList[i]);
if assigned(def) and
(def.typ=procdef) then
begin
include(tprocdef(def).procoptions,po_virtualmethod);
end;
end;
end;
procedure handleImplementedInterface(intfdef : tobjectdef);
begin
if not is_interface(intfdef) then
begin
Message1(type_e_interface_type_expected,intfdef.typename);
exit;
end;
if current_objectdef.find_implemented_interface(intfdef)<>nil then
Message1(sym_e_duplicate_id,intfdef.objname^)
else
begin
{ allocate and prepare the GUID only if the class
implements some interfaces. }
if current_objectdef.ImplementedInterfaces.count = 0 then
current_objectdef.prepareguid;
current_objectdef.ImplementedInterfaces.Add(TImplementedInterface.Create(intfdef));
end;
end;
procedure handleImplementedProtocol(intfdef : tobjectdef);
begin
if not is_objcprotocol(intfdef) then
begin
Message1(type_e_protocol_type_expected,intfdef.typename);
exit;
end;
if current_objectdef.find_implemented_interface(intfdef)<>nil then
Message1(sym_e_duplicate_id,intfdef.objname^)
else
begin
current_objectdef.ImplementedInterfaces.Add(TImplementedInterface.Create(intfdef));
end;
end;
procedure readImplementedInterfacesAndProtocols(intf: boolean);
var
hdef : tdef;
begin
while try_to_consume(_COMMA) do
begin
id_type(hdef,false);
if (hdef.typ<>objectdef) then
begin
if intf then
Message1(type_e_interface_type_expected,hdef.typename)
else
Message1(type_e_protocol_type_expected,hdef.typename);
continue;
end;
if intf then
handleImplementedInterface(tobjectdef(hdef))
else
handleImplementedProtocol(tobjectdef(hdef));
end;
end;
procedure readinterfaceiid;
var
p : tnode;
valid : boolean;
begin
p:=comp_expr(true);
if p.nodetype=stringconstn then
begin
stringdispose(current_objectdef.iidstr);
current_objectdef.iidstr:=stringdup(strpas(tstringconstnode(p).value_str));
valid:=string2guid(current_objectdef.iidstr^,current_objectdef.iidguid^);
if (current_objectdef.objecttype in [odt_interfacecom,odt_dispinterface]) and
not valid then
Message(parser_e_improper_guid_syntax);
include(current_objectdef.objectoptions,oo_has_valid_guid);
end
else
Message(parser_e_illegal_expression);
p.free;
end;
procedure parse_object_options;
begin
if current_objectdef.objecttype in [odt_object,odt_class] then
begin
while true do
begin
if try_to_consume(_ABSTRACT) then
include(current_objectdef.objectoptions,oo_is_abstract)
else
if try_to_consume(_SEALED) then
include(current_objectdef.objectoptions,oo_is_sealed)
else
break;
end;
if [oo_is_abstract, oo_is_sealed] * current_objectdef.objectoptions = [oo_is_abstract, oo_is_sealed] then
Message(parser_e_abstract_and_sealed_conflict);
end;
end;
procedure parse_parent_classes;
var
intfchildof,
childof : tobjectdef;
hdef : tdef;
hasparentdefined : boolean;
begin
childof:=nil;
intfchildof:=nil;
hasparentdefined:=false;
{ reads the parent class }
if (token=_LKLAMMER) or
is_objccategory(current_objectdef) then
begin
consume(_LKLAMMER);
{ use single_type instead of id_type for specialize support }
single_type(hdef,false,false);
if (not assigned(hdef)) or
(hdef.typ<>objectdef) then
begin
if assigned(hdef) then
Message1(type_e_class_type_expected,hdef.typename)
else if is_objccategory(current_objectdef) then
{ a category must specify the class to extend }
Message(type_e_objcclass_type_expected);
end
else
begin
childof:=tobjectdef(hdef);
{ a mix of class, interfaces, objects and cppclasses
isn't allowed }
case current_objectdef.objecttype of
odt_class:
if not(is_class(childof)) then
begin
if is_interface(childof) then
begin
{ we insert the interface after the child
is set, see below
}
intfchildof:=childof;
childof:=class_tobject;
end
else
Message(parser_e_mix_of_classes_and_objects);
end
else
if oo_is_sealed in childof.objectoptions then
Message1(parser_e_sealed_descendant,childof.typename);
odt_interfacecorba,
odt_interfacecom:
begin
if not(is_interface(childof)) then
Message(parser_e_mix_of_classes_and_objects);
current_objectdef.objecttype:=childof.objecttype;
end;
odt_cppclass:
if not(is_cppclass(childof)) then
Message(parser_e_mix_of_classes_and_objects);
odt_objcclass:
if not(is_objcclass(childof) or
is_objccategory(childof)) then
begin
if is_objcprotocol(childof) then
begin
if not(oo_is_classhelper in current_objectdef.objectoptions) then
begin
intfchildof:=childof;
childof:=nil;
CGMessage(parser_h_no_objc_parent);
end
else
{ a category must specify the class to extend }
CGMessage(type_e_objcclass_type_expected);
end
else
Message(parser_e_mix_of_classes_and_objects);
end;
odt_objcprotocol:
begin
if not(is_objcprotocol(childof)) then
Message(parser_e_mix_of_classes_and_objects);
intfchildof:=childof;
childof:=nil;
end;
odt_object:
if not(is_object(childof)) then
Message(parser_e_mix_of_classes_and_objects)
else
if oo_is_sealed in childof.objectoptions then
Message1(parser_e_sealed_descendant,childof.typename);
odt_dispinterface:
Message(parser_e_dispinterface_cant_have_parent);
end;
end;
hasparentdefined:=true;
end;
{ no generic as parents }
if assigned(childof) and
(df_generic in childof.defoptions) then
begin
Message(parser_e_no_generics_as_types);
childof:=nil;
end;
{ if no parent class, then a class get tobject as parent }
if not assigned(childof) then
begin
case current_objectdef.objecttype of
odt_class:
if current_objectdef<>class_tobject then
childof:=class_tobject;
odt_interfacecom:
if current_objectdef<>interface_iunknown then
childof:=interface_iunknown;
odt_objcclass:
CGMessage(parser_h_no_objc_parent);
end;
end;
if assigned(childof) then
begin
{ Forbid not completly defined objects to be used as parents. This will
also prevent circular loops of classes, because we set the forward flag
at the start of the new definition and will reset it below after the
parent has been set }
if not(oo_is_forward in childof.objectoptions) then
current_objectdef.set_parent(childof)
else
Message1(parser_e_forward_declaration_must_be_resolved,childof.objrealname^);
end;
{ remove forward flag, is resolved }
exclude(current_objectdef.objectoptions,oo_is_forward);
if hasparentdefined then
begin
if current_objectdef.objecttype in [odt_class,odt_objcclass,odt_objcprotocol] then
begin
if assigned(intfchildof) then
if current_objectdef.objecttype=odt_class then
handleImplementedInterface(intfchildof)
else
handleImplementedProtocol(intfchildof);
readImplementedInterfacesAndProtocols(current_objectdef.objecttype=odt_class);
end;
consume(_RKLAMMER);
end;
end;
procedure parse_guid;
begin
{ read GUID }
if (current_objectdef.objecttype in [odt_interfacecom,odt_interfacecorba,odt_dispinterface]) and
try_to_consume(_LECKKLAMMER) then
begin
readinterfaceiid;
consume(_RECKKLAMMER);
end
else if (current_objectdef.objecttype=odt_dispinterface) then
message(parser_e_dispinterface_needs_a_guid);
end;
procedure insert_generic_parameter_types(genericdef:tstoreddef;genericlist:TFPObjectList);
var
i : longint;
generictype : ttypesym;
begin
current_objectdef.genericdef:=genericdef;
if not assigned(genericlist) then
exit;
for i:=0 to genericlist.count-1 do
begin
generictype:=ttypesym(genericlist[i]);
if generictype.typedef.typ=undefineddef then
include(current_objectdef.defoptions,df_generic)
else
include(current_objectdef.defoptions,df_specialization);
symtablestack.top.insert(generictype);
end;
end;
procedure parse_object_members;
procedure chkobjc(pd: tprocdef);
begin
if is_objc_class_or_protocol(pd._class) then
begin
include(pd.procoptions,po_objc);
end;
end;
procedure chkcpp(pd:tprocdef);
begin
{ nothing currently }
end;
procedure maybe_parse_hint_directives(pd:tprocdef);
var
dummysymoptions : tsymoptions;
deprecatedmsg : pshortstring;
begin
dummysymoptions:=[];
deprecatedmsg:=nil;
while try_consume_hintdirective(dummysymoptions,deprecatedmsg) do
Consume(_SEMICOLON);
if assigned(pd) then
begin
pd.symoptions:=pd.symoptions+dummysymoptions;
pd.deprecatedmsg:=deprecatedmsg;
end
else
stringdispose(deprecatedmsg);
end;
var
pd : tprocdef;
has_destructor,
oldparse_only,
old_parse_generic : boolean;
object_member_blocktype : tblock_type;
fields_allowed, is_classdef, classfields: boolean;
vdoptions: tvar_dec_options;
begin
{ empty class declaration ? }
if (current_objectdef.objecttype in [odt_class,odt_objcclass]) and
(token=_SEMICOLON) then
exit;
old_parse_generic:=parse_generic;
parse_generic:=(df_generic in current_objectdef.defoptions);
{ in "publishable" classes the default access type is published }
if (oo_can_have_published in current_objectdef.objectoptions) then
current_objectdef.symtable.currentvisibility:=vis_published
else
current_objectdef.symtable.currentvisibility:=vis_public;
testcurobject:=1;
has_destructor:=false;
fields_allowed:=true;
is_classdef:=false;
classfields:=false;
object_member_blocktype:=bt_general;
repeat
case token of
_TYPE :
begin
if (([df_generic,df_specialization]*current_objectdef.defoptions)=[]) and
not(current_objectdef.objecttype in [odt_class,odt_object]) then
Message(parser_e_type_var_const_only_in_generics_and_classes);
consume(_TYPE);
object_member_blocktype:=bt_type;
end;
_VAR :
begin
if (([df_generic,df_specialization]*current_objectdef.defoptions)=[]) and
not(current_objectdef.objecttype in [odt_class,odt_object]) then
Message(parser_e_type_var_const_only_in_generics_and_classes);
consume(_VAR);
fields_allowed:=true;
object_member_blocktype:=bt_general;
classfields:=is_classdef;
is_classdef:=false;
end;
_CONST:
begin
if (([df_generic,df_specialization]*current_objectdef.defoptions)=[]) and
not(current_objectdef.objecttype in [odt_class,odt_object]) then
Message(parser_e_type_var_const_only_in_generics_and_classes);
consume(_CONST);
object_member_blocktype:=bt_const;
end;
_ID :
begin
if is_objcprotocol(current_objectdef) and
((idtoken=_REQUIRED) or
(idtoken=_OPTIONAL)) then
begin
current_objectdef.symtable.currentlyoptional:=(idtoken=_OPTIONAL);
consume(idtoken)
end
else case idtoken of
_PRIVATE :
begin
if is_interface(current_objectdef) or
is_objc_protocol_or_category(current_objectdef) then
Message(parser_e_no_access_specifier_in_interfaces);
consume(_PRIVATE);
current_objectdef.symtable.currentvisibility:=vis_private;
include(current_objectdef.objectoptions,oo_has_private);
fields_allowed:=true;
end;
_PROTECTED :
begin
if is_interface(current_objectdef) or
is_objc_protocol_or_category(current_objectdef) then
Message(parser_e_no_access_specifier_in_interfaces);
consume(_PROTECTED);
current_objectdef.symtable.currentvisibility:=vis_protected;
include(current_objectdef.objectoptions,oo_has_protected);
fields_allowed:=true;
end;
_PUBLIC :
begin
if is_interface(current_objectdef) or
is_objc_protocol_or_category(current_objectdef) then
Message(parser_e_no_access_specifier_in_interfaces);
consume(_PUBLIC);
current_objectdef.symtable.currentvisibility:=vis_public;
fields_allowed:=true;
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(current_objectdef) then
Message(parser_e_no_access_specifier_in_interfaces);
{ Objective-C classes do not support "published",
as basically everything is published. }
if is_objc_class_or_protocol(current_objectdef) then
Message(parser_e_no_objc_published);
consume(_PUBLISHED);
current_objectdef.symtable.currentvisibility:=vis_published;
fields_allowed:=true;
end;
_STRICT :
begin
if is_interface(current_objectdef) or
is_objc_protocol_or_category(current_objectdef) then
Message(parser_e_no_access_specifier_in_interfaces);
consume(_STRICT);
if token=_ID then
begin
case idtoken of
_PRIVATE:
begin
consume(_PRIVATE);
current_objectdef.symtable.currentvisibility:=vis_strictprivate;
include(current_objectdef.objectoptions,oo_has_strictprivate);
end;
_PROTECTED:
begin
consume(_PROTECTED);
current_objectdef.symtable.currentvisibility:=vis_strictprotected;
include(current_objectdef.objectoptions,oo_has_strictprotected);
end;
else
message(parser_e_protected_or_private_expected);
end;
end
else
message(parser_e_protected_or_private_expected);
fields_allowed:=true;
end;
else
begin
if object_member_blocktype=bt_general then
begin
if is_interface(current_objectdef) or
is_objc_protocol_or_category(current_objectdef) then
Message(parser_e_no_vars_in_interfaces);
if (current_objectdef.symtable.currentvisibility=vis_published) and
not(oo_can_have_published in current_objectdef.objectoptions) then
Message(parser_e_cant_have_published);
if (not fields_allowed) then
Message(parser_e_field_not_allowed_here);
vdoptions:=[vd_object];
if classfields then
include(vdoptions,vd_class);
read_record_fields(vdoptions);
end
else if object_member_blocktype=bt_type then
types_dec(true)
else if object_member_blocktype=bt_const then
consts_dec(true)
else
internalerror(201001110);
end;
end;
end;
_PROPERTY :
begin
property_dec(is_classdef);
fields_allowed:=false;
is_classdef:=false;
end;
_CLASS:
begin
is_classdef:=false;
{ read class method }
if try_to_consume(_CLASS) then
begin
{ class modifier is only allowed for procedures, functions, }
{ constructors, destructors, fields and properties }
if not(token in [_FUNCTION,_PROCEDURE,_PROPERTY,_VAR,_CONSTRUCTOR,_DESTRUCTOR]) then
Message(parser_e_procedure_or_function_expected);
if is_interface(current_objectdef) then
Message(parser_e_no_static_method_in_interfaces)
else
{ class methods are also allowed for Objective-C protocols }
is_classdef:=true;
end;
end;
_PROCEDURE,
_FUNCTION:
begin
if (current_objectdef.symtable.currentvisibility=vis_published) and
not(oo_can_have_published in current_objectdef.objectoptions) then
Message(parser_e_cant_have_published);
oldparse_only:=parse_only;
parse_only:=true;
pd:=parse_proc_dec(is_classdef, current_objectdef);
{ 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);
{ check if dispid is set }
if is_dispinterface(pd._class) and not (po_dispid in pd.procoptions) then
begin
pd.dispid:=pd._class.get_next_dispid;
include(pd.procoptions, po_dispid);
end;
{ all Macintosh Object Pascal methods are virtual. }
{ this can't be a class method, because macpas mode }
{ has no m_class }
if (m_mac in current_settings.modeswitches) then
include(pd.procoptions,po_virtualmethod);
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(current_objectdef.objectoptions,oo_has_msgint);
if (po_msgstr in pd.procoptions) then
include(current_objectdef.objectoptions,oo_has_msgstr);
if (po_virtualmethod in pd.procoptions) then
include(current_objectdef.objectoptions,oo_has_virtual);
chkcpp(pd);
chkobjc(pd);
end;
maybe_parse_hint_directives(pd);
parse_only:=oldparse_only;
fields_allowed:=false;
is_classdef:=false;
end;
_CONSTRUCTOR :
begin
if (current_objectdef.symtable.currentvisibility=vis_published) and
not(oo_can_have_published in current_objectdef.objectoptions) then
Message(parser_e_cant_have_published);
if not is_classdef and not(current_objectdef.symtable.currentvisibility in [vis_public,vis_published]) then
Message(parser_w_constructor_should_be_public);
if is_interface(current_objectdef) then
Message(parser_e_no_con_des_in_interfaces);
{ Objective-C does not know the concept of a constructor }
if is_objc_class_or_protocol(current_objectdef) then
Message(parser_e_objc_no_constructor_destructor);
{ only 1 class constructor is allowed }
if is_classdef and (oo_has_class_constructor in current_objectdef.objectoptions) then
Message1(parser_e_only_one_class_constructor_allowed, current_objectdef.objrealname^);
oldparse_only:=parse_only;
parse_only:=true;
if is_classdef then
pd:=class_constructor_head
else
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(current_objectdef.objectoptions,oo_has_virtual);
chkcpp(pd);
maybe_parse_hint_directives(pd);
parse_only:=oldparse_only;
fields_allowed:=false;
is_classdef:=false;
end;
_DESTRUCTOR :
begin
if (current_objectdef.symtable.currentvisibility=vis_published) and
not(oo_can_have_published in current_objectdef.objectoptions) then
Message(parser_e_cant_have_published);
if not is_classdef then
if has_destructor then
Message(parser_n_only_one_destructor)
else
has_destructor:=true;
if is_interface(current_objectdef) then
Message(parser_e_no_con_des_in_interfaces);
if not is_classdef and (current_objectdef.symtable.currentvisibility<>vis_public) then
Message(parser_w_destructor_should_be_public);
{ Objective-C does not know the concept of a destructor }
if is_objc_class_or_protocol(current_objectdef) then
Message(parser_e_objc_no_constructor_destructor);
{ only 1 class destructor is allowed }
if is_classdef and (oo_has_class_destructor in current_objectdef.objectoptions) then
Message1(parser_e_only_one_class_destructor_allowed, current_objectdef.objrealname^);
oldparse_only:=parse_only;
parse_only:=true;
if is_classdef then
pd:=class_destructor_head
else
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(current_objectdef.objectoptions,oo_has_virtual);
chkcpp(pd);
maybe_parse_hint_directives(pd);
parse_only:=oldparse_only;
fields_allowed:=false;
is_classdef:=false;
end;
_END :
begin
consume(_END);
break;
end;
else
consume(_ID); { Give a ident expected message, like tp7 }
end;
until false;
{ restore }
testcurobject:=0;
parse_generic:=old_parse_generic;
end;
function object_dec(objecttype:tobjecttyp;const n:tidstring;genericdef:tstoreddef;genericlist:TFPObjectList;fd : tobjectdef) : tobjectdef;
var
old_current_objectdef : tobjectdef;
begin
old_current_objectdef:=current_objectdef;
current_objectdef:=nil;
{ objects and class types can't be declared local }
if not(symtablestack.top.symtabletype in [globalsymtable,staticsymtable,objectsymtable]) and
not assigned(genericlist) then
Message(parser_e_no_local_objects);
{ reuse forward objectdef? }
if assigned(fd) then
begin
if fd.objecttype<>objecttype then
begin
Message(parser_e_forward_mismatch);
{ recover }
current_objectdef:=tobjectdef.create(current_objectdef.objecttype,n,nil);
include(current_objectdef.objectoptions,oo_is_forward);
end
else
current_objectdef:=fd
end
else
begin
{ anonym objects aren't allow (o : object a : longint; end;) }
if n='' then
Message(parser_f_no_anonym_objects);
{ create new class }
current_objectdef:=tobjectdef.create(objecttype,n,nil);
{ include always the forward flag, it'll be removed after the parent class have been
added. This is to prevent circular childof loops }
include(current_objectdef.objectoptions,oo_is_forward);
if (cs_compilesystem in current_settings.moduleswitches) then
begin
case current_objectdef.objecttype of
odt_interfacecom :
if (current_objectdef.objname^='IUNKNOWN') then
interface_iunknown:=current_objectdef;
odt_class :
if (current_objectdef.objname^='TOBJECT') then
class_tobject:=current_objectdef;
end;
end;
if (current_module.modulename^='OBJCBASE') then
begin
case current_objectdef.objecttype of
odt_objcclass:
if (current_objectdef.objname^='Protocol') then
objc_protocoltype:=current_objectdef;
end;
end;
end;
{ set published flag in $M+ mode, it can also be inherited and will
be added when the parent class set with tobjectdef.set_parent (PFV) }
if (cs_generate_rtti in current_settings.localswitches) and
(current_objectdef.objecttype in [odt_interfacecom,odt_class]) then
include(current_objectdef.objectoptions,oo_can_have_published);
{ forward def? }
if not assigned(fd) and
(token=_SEMICOLON) then
begin
{ add to the list of definitions to check that the forward
is resolved. this is required for delphi mode }
current_module.checkforwarddefs.add(current_objectdef);
end
else
begin
{ change objccategories into objcclass helpers }
if (objecttype=odt_objccategory) then
begin
current_objectdef.objecttype:=odt_objcclass;
include(current_objectdef.objectoptions,oo_is_classhelper);
end;
{ parse list of options (abstract / sealed) }
parse_object_options;
{ parse list of parent classes }
parse_parent_classes;
{ parse optional GUID for interfaces }
parse_guid;
{ parse and insert object members }
symtablestack.push(current_objectdef.symtable);
insert_generic_parameter_types(genericdef,genericlist);
parse_object_members;
symtablestack.pop(current_objectdef.symtable);
end;
{ generate vmt space if needed }
if not(oo_has_vmt in current_objectdef.objectoptions) and
not(oo_is_forward in current_objectdef.objectoptions) and
(
([oo_has_virtual,oo_has_constructor,oo_has_destructor]*current_objectdef.objectoptions<>[]) or
(current_objectdef.objecttype in [odt_class])
) then
current_objectdef.insertvmt;
{ for implemented classes with a vmt check if there is a constructor }
if (oo_has_vmt in current_objectdef.objectoptions) and
not(oo_is_forward in current_objectdef.objectoptions) and
not(oo_has_constructor in current_objectdef.objectoptions) and
not is_objc_class_or_protocol(current_objectdef) then
Message1(parser_w_virtual_without_constructor,current_objectdef.objrealname^);
if is_interface(current_objectdef) or
is_objcprotocol(current_objectdef) then
setinterfacemethodoptions
else if is_objcclass(current_objectdef) then
setobjcclassmethodoptions;
{ return defined objectdef }
result:=current_objectdef;
{ restore old state }
current_objectdef:=old_current_objectdef;
end;
end.
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