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963a4d7b23
fpc/compiler/pdecobj.pas
svenbarth 963a4d7b23 Commit of a completely restructured helper implementation. Instead of changing objectdefs with odt_classhelper to odt_class, they'll have the odt_helper type assigned to and this will be kept. This also implies that the parent of a helper is its true parent while the extended type is set to a field in tobjectdef (extendeddef). 
This change became necessary of the following reasons:
- Records don't support inheritance, thus for "record helpers" some creativity would have been necessary to implement them; with the new implementation this is more easily
- the new approach allows for easy checks regarding virtual methods and their overrides which would have been more complicated in the old variant
- if someone feels the need the types of helpers (object, interface) can be added rather easily
- unnecessary things like VMT generation can be disabled now

details:
- msg*: 
* moved some messages from parser to type
* adjusted a message ("class helper" => "helper")
- symdef.pas:
* renamed "helperparent" to "extendeddef" and changed its type from "tobjectdef" to "tabstractrecorddef", so records can be extended as well (somewhen in the near future)
* removed "finish_class_helper" method as it isn't necessary (luckily I haven't yet adjusted the ObjC variant)
* changed name of "is_objectpascal_classhelper" to "is_objectpascal_helper" to reflect that this function applies to all helper types
* tobjectdef.create: ImplementedInterfaces isn't created for odt_helper anymore
* tobjectdef.alignment: for helpers it's the same as for classes although this shouldn't be used anywhere...
* tobjectdef.vmtmethodoffset: set to 0 for helpers to be sure...
* tobjectdef.needs_inittable: not needed for helpers (no fields allowed)
* is_objectpascal_helper: only needs check for "odt_helper" object type
- symconst.pas:
* changed odt_classhelper to more general odt_helper
* added new type "thelpertype" which is used to check that "(record|class) helper" corresponds with the given extended type (as Delphi XE checks this as well this strict solution can be kept for modes Delphi and ObjFPC)
- symtable.pas:
* extended "searchsym_in_class" with the possibility to disable the search for helper methods (needed for inherited) => this implies changing all occurences of "searchsym_in_class" with a "true" except some special locations
* renamed "search_objectpascal_classhelper" to "search_objectpascal_helper"
* searchsym_in_class: 
** when an extended method is defined with "overload" it can be that a same named method of the extended class might be called (sadly this means that this search was unnecessary...)
** contextclassh is the def of the helper in the case of an inherited call inside the helper's implementation
** when methods inside a helper are searched, it must be searched in the extended type first
- ptype.pas:
* single_type is used to parse the parent of a helper as well, so allow a helper if the stoParseClassParent is given (needs check in pdecobj.pas/parse_class_parents for normal classes)
* read_named_type: currently the only case when something <> ht_none is passed to the modified parse_objdec (see below) is when the combination "class helper" is encountered ("record helper" will be another one)
- pinline.pas: adjustment for extended "searchsym_in_class"
- pexpr.pas:
* adjustments regarding "searchsym_in_class" and "is_objectpascal_helper"
* factor/factor_read_id: moved the check for "TSomeClassType.SomeMethod" outside of the "is_class" check
* factor: 
** in case of an inherited we need to search inside the extended type first (Note: this needs to be extended to find methods in the helper parent if no method is found in the extended type)
** we also need to disable the search for helper methods when searching for an inherited method (Note: it might be better to introduce a enum to decide whether a helper method should search before or after the methods of the extended type or even never)
- pdecsub.pas:
* insert_self_and_vmt_para: in a helper the type of Self is of the extended type
* pd_abstract, pd_final: more nice error message
* pd_override, pd_message, pd_reintroduce: adjusted checks because now "is_class" is no longer true for helpers
* proc_direcdata: allowed "abstract" for helpers (only to produce a more nice error message)
* parse_proc_direc: adjustment because of "is_objectpascal_helper"
- pdecobj.pas:
* adjustments regarding "is_objectpascal_helper"
* adjusted object_dec to take the type of the helper (class, record) as a parameter to be able to check whether the correct extended type was given
* struct_property_dec: properties are allowed in helpers
* parse_object_options: nothing to be parsed for helpers (at least I hope so ^^)
* parse_parent_classes: 
** the parent of a helper is now parsed as a normal parent, the extended type is parsed in an extra procedure
** check for "sealed" no longer needed
** added check that the parsed parent of a helper is indeed a helper
** allow to parse the closing ")" of the helper's parent
* parse_extended_class:
** new procedure that parses the type which is extended
** it checks that the extended type is a class for "class helper" and a record for "record helper"
** it checks that a helper extends the same class or a subclass for class helpers
** it checks that a helper extends the same record for record helpers
* parse_object_members:
** "type", "const", "var" is allowed in helpers
** don't exclude flags regarding virtual methods, they are needed for the checks in mode Delphi (this implies that VMT loading must be disabled for helpers)
* object_dec:
** don't change "odt_helper" to "odt_class", but still include the "oo_is_classhelper" flag
** allow the parsing of object options (there are none)
** parse the extended type for helpers
- pdecl.pas
* adjustment because of extension of object_dec
* types_dec: remove the call to finish_classhelper
- objcdef.pas
* objcaddencodedtype, objcdochecktype: add references to helpers as implicit pointers although that should not be used in any way...
- nld.pas
* tloadnode.pass_typecheck: self is a reference to the extended type
- nflw.pas
* create_for_in_loop: adjustment because of changed procedure and inheritance type
- ncgrtti.pas
* TRTTIWriter.write_rtti_data: disable for helpers for now (I need to check what Delphi does here)
- ncgld.pas
* tcgloadnode.pass_generate_code: virtual methods of helpers are treated as normal methods
- ncgcal.pas
* tcgcallnode.pass_generate_code: virtual methods of helpers are treated as normal methods
- ncal.pas
* tcallnode.pass_typecheck: adjust for extension of tcallcandidates constructor
- htypechk.pas
* tcallcandidates declaration: extend some methods to (dis)allow the search for helper methods (needed for inherited)
* tcallcandidates.collect_overloads_in_struct: 
** search first in helpers for methods and stop if none carries the "overload" flag
** move the addition of the procsyms to an extra nested procedure because it's used for helper methods and normal struct methods

git-svn-id: branches/svenbarth/classhelpers@16947 -
2011-02-20 11:41:55 +00:00

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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;helpertype:thelpertype) : tobjectdef;
function class_constructor_head:tprocdef;
function class_destructor_head:tprocdef;
function constructor_head:tprocdef;
function destructor_head:tprocdef;
procedure struct_property_dec(is_classproperty:boolean);
implementation
uses
sysutils,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';
var
current_objectdef : tobjectdef absolute current_structdef;
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_structdef,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_structdef.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_structdef,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_structdef.objectoptions,oo_has_constructor);
{ Set return type, class and record constructors return the
created instance, object constructors return boolean }
if is_class(pd.struct) or is_record(pd.struct) then
pd.returndef:=pd.struct
else
{$ifdef CPU64bitaddr}
pd.returndef:=bool64type;
{$else CPU64bitaddr}
pd.returndef:=bool32type;
{$endif CPU64bitaddr}
result:=pd;
end;
procedure struct_property_dec(is_classproperty:boolean);
var
p : tpropertysym;
begin
{ check for a class, record or helper }
if not((is_class_or_interface_or_dispinterface(current_structdef) or is_record(current_structdef) or is_objectpascal_helper(current_structdef)) or
(not(m_tp7 in current_settings.modeswitches) and (is_object(current_structdef)))) then
Message(parser_e_syntax_error);
consume(_PROPERTY);
p:=read_property_dec(is_classproperty,current_structdef);
consume(_SEMICOLON);
if try_to_consume(_DEFAULT) then
begin
if oo_has_default_property in current_structdef.objectoptions then
message(parser_e_only_one_default_property);
include(current_structdef.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_structdef.objectoptions then
message(parser_e_only_one_enumerator_current);
if not p.propaccesslist[palt_read].empty then
begin
include(current_structdef.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_structdef,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_structdef.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_structdef,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_structdef.objectoptions,oo_has_destructor);
{ no return value }
pd.returndef:=voidtype;
result:=pd;
end;
procedure setinterfacemethodoptions;
var
i : longint;
def : tdef;
begin
include(current_structdef.objectoptions,oo_has_virtual);
for i:=0 to current_structdef.symtable.DefList.count-1 do
begin
def:=tdef(current_structdef.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_structdef.symtable.DefList.count-1 do
begin
def:=tdef(current_structdef.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 (oo_is_forward in intfdef.objectoptions) then
begin
Message1(parser_e_forward_protocol_declaration_must_be_resolved,intfdef.objrealname^);
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
{ use single_type instead of id_type for specialize support }
single_type(hdef,[stoAllowSpecialization,stoParseClassParent]);
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,false);
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_structdef.objectoptions,oo_has_valid_guid);
end
else
Message(parser_e_illegal_expression);
p.free;
end;
procedure get_cpp_class_external_status(od: tobjectdef);
var
hs: string;
begin
{ C++ classes can be external -> all methods inside are external
(defined at the class level instead of per method, so that you cannot
define some methods as external and some not)
}
if try_to_consume(_EXTERNAL) then
begin
if token in [_CSTRING,_CWSTRING,_CCHAR,_CWCHAR] then
begin
{ Always add library prefix and suffix to create an uniform name }
hs:=get_stringconst;
if ExtractFileExt(hs)='' then
hs:=ChangeFileExt(hs,target_info.sharedlibext);
if Copy(hs,1,length(target_info.sharedlibprefix))<>target_info.sharedlibprefix then
hs:=target_info.sharedlibprefix+hs;
od.import_lib:=stringdup(hs);
end;
include(od.objectoptions, oo_is_external);
{ check if we shall use another name for the class }
if try_to_consume(_NAME) then
od.objextname:=stringdup(get_stringconst)
else
od.objextname:=stringdup(od.objrealname^);
include(od.objectoptions,oo_is_external);
end
else
od.objextname:=stringdup(od.objrealname^);
{ ToDo: read the namespace of the class (influences the mangled name)}
end;
procedure get_objc_class_or_protocol_external_status(od: tobjectdef);
begin
{ Objective-C classes can be external -> all messages inside are
external (defined at the class level instead of per method, so
that you cannot define some methods as external and some not)
}
if try_to_consume(_EXTERNAL) then
begin
if try_to_consume(_NAME) then
od.objextname:=stringdup(get_stringconst)
else
{ the external name doesn't matter for formally declared
classes, and allowing to specify one would mean that we would
have to check it for consistency with the actual definition
later on }
od.objextname:=stringdup(od.objrealname^);
include(od.objectoptions,oo_is_external);
end
else
od.objextname:=stringdup(od.objrealname^);
end;
procedure parse_object_options;
begin
case current_objectdef.objecttype of
odt_object,odt_class:
begin
while true do
begin
if try_to_consume(_ABSTRACT) then
include(current_structdef.objectoptions,oo_is_abstract)
else
if try_to_consume(_SEALED) then
include(current_structdef.objectoptions,oo_is_sealed)
else
break;
end;
if [oo_is_abstract, oo_is_sealed] * current_structdef.objectoptions = [oo_is_abstract, oo_is_sealed] then
Message(parser_e_abstract_and_sealed_conflict);
end;
odt_cppclass:
get_cpp_class_external_status(current_objectdef);
odt_objcclass,odt_objcprotocol,odt_objccategory:
get_objc_class_or_protocol_external_status(current_objectdef);
odt_helper: ; // nothing
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_structdef) then
begin
consume(_LKLAMMER);
{ use single_type instead of id_type for specialize support }
single_type(hdef,[stoAllowSpecialization, stoParseClassParent]);
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_structdef) 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_structdef.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
else
childof:=find_real_objcclass_definition(childof,true);
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);
odt_helper:
if not is_objectpascal_helper(childof) then
begin
Message(type_e_helper_type_expected);
childof:=nil;
end;
end;
end;
hasparentdefined:=true;
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_dispinterface:
childof:=interface_idispatch;
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 (oo_is_forward in childof.objectoptions) then
Message1(parser_e_forward_declaration_must_be_resolved,childof.objrealname^)
else if not(oo_is_formal in childof.objectoptions) then
current_objectdef.set_parent(childof)
else
Message1(sym_e_objc_formal_class_not_resolved,childof.objrealname^);
end;
{ remove forward flag, is resolved }
exclude(current_structdef.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_extended_class(helpertype:thelpertype);
var
hdef: tdef;
begin
if not is_objectpascal_helper(current_structdef) then
Internalerror(2011021103);
if helpertype=ht_none then
Internalerror(2011021001);
consume(_FOR);
single_type(hdef,[stoAllowTypeDef,stoParseClassParent]);
if (not assigned(hdef)) or
not (hdef.typ in [objectdef,recorddef]) then
begin
if helpertype=ht_class then
Message1(type_e_class_type_expected,hdef.typename)
else
if helpertype=ht_record then
Message1(type_e_record_type_expected,hdef.typename);
end
else
begin
case helpertype of
ht_class:
begin
if not is_class(hdef) then
Message1(type_e_class_type_expected,hdef.typename);
{ a class helper must extend the same class or a subclass
of the class extended by the parent class helper }
if assigned(current_objectdef.childof) then
begin
if not is_class(current_objectdef.childof.extendeddef) then
Internalerror(2011021101);
if not hdef.is_related(current_objectdef.childof.extendeddef) then
Message1(type_e_class_helper_must_extend_subclass,current_objectdef.childof.extendeddef.typename);
end;
end;
ht_record:
begin
if not is_record(hdef) then
Message1(type_e_record_type_expected,hdef.typename);
{ a record helper must extend the same record as the
parent helper }
if assigned(current_objectdef.childof) then
begin
if not is_record(current_objectdef.childof.extendeddef) then
Internalerror(2011021102);
if hdef<>current_objectdef.childof.extendeddef then
Message1(type_e_record_helper_must_extend_same_record,current_objectdef.childof.extendeddef.typename);
end;
end;
end;
current_objectdef.extendeddef:=tabstractrecorddef(hdef);
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 parse_object_members;
procedure chkobjc(pd: tprocdef);
begin
if is_objc_class_or_protocol(pd.struct) 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: 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;
{ in "publishable" classes the default access type is published }
if (oo_can_have_published in current_structdef.objectoptions) then
current_structdef.symtable.currentvisibility:=vis_published
else
current_structdef.symtable.currentvisibility:=vis_public;
has_destructor:=false;
fields_allowed:=true;
is_classdef:=false;
classfields:=false;
object_member_blocktype:=bt_general;
repeat
case token of
_TYPE :
begin
if not(current_objectdef.objecttype in [odt_class,odt_object,odt_helper]) then
Message(parser_e_type_var_const_only_in_records_and_classes);
consume(_TYPE);
object_member_blocktype:=bt_type;
end;
_VAR :
begin
if not(current_objectdef.objecttype in [odt_class,odt_object,odt_helper]) then
Message(parser_e_type_var_const_only_in_records_and_classes);
consume(_VAR);
fields_allowed:=true;
object_member_blocktype:=bt_general;
classfields:=is_classdef;
is_classdef:=false;
end;
_CONST:
begin
if not(current_objectdef.objecttype in [odt_class,odt_object,odt_helper]) then
Message(parser_e_type_var_const_only_in_records_and_classes);
consume(_CONST);
object_member_blocktype:=bt_const;
end;
_ID :
begin
if is_objcprotocol(current_structdef) and
((idtoken=_REQUIRED) or
(idtoken=_OPTIONAL)) then
begin
current_structdef.symtable.currentlyoptional:=(idtoken=_OPTIONAL);
consume(idtoken)
end
else case idtoken of
_PRIVATE :
begin
if is_interface(current_structdef) or
is_objc_protocol_or_category(current_structdef) then
Message(parser_e_no_access_specifier_in_interfaces);
consume(_PRIVATE);
current_structdef.symtable.currentvisibility:=vis_private;
include(current_structdef.objectoptions,oo_has_private);
fields_allowed:=true;
is_classdef:=false;
classfields:=false;
object_member_blocktype:=bt_general;
end;
_PROTECTED :
begin
if is_interface(current_structdef) or
is_objc_protocol_or_category(current_structdef) then
Message(parser_e_no_access_specifier_in_interfaces);
consume(_PROTECTED);
current_structdef.symtable.currentvisibility:=vis_protected;
include(current_structdef.objectoptions,oo_has_protected);
fields_allowed:=true;
is_classdef:=false;
classfields:=false;
object_member_blocktype:=bt_general;
end;
_PUBLIC :
begin
if is_interface(current_structdef) or
is_objc_protocol_or_category(current_structdef) then
Message(parser_e_no_access_specifier_in_interfaces);
consume(_PUBLIC);
current_structdef.symtable.currentvisibility:=vis_public;
fields_allowed:=true;
is_classdef:=false;
classfields:=false;
object_member_blocktype:=bt_general;
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_structdef) 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_structdef) then
Message(parser_e_no_objc_published);
consume(_PUBLISHED);
current_structdef.symtable.currentvisibility:=vis_published;
fields_allowed:=true;
is_classdef:=false;
classfields:=false;
object_member_blocktype:=bt_general;
end;
_STRICT :
begin
if is_interface(current_structdef) or
is_objc_protocol_or_category(current_structdef) then
Message(parser_e_no_access_specifier_in_interfaces);
consume(_STRICT);
if token=_ID then
begin
case idtoken of
_PRIVATE:
begin
consume(_PRIVATE);
current_structdef.symtable.currentvisibility:=vis_strictprivate;
include(current_structdef.objectoptions,oo_has_strictprivate);
end;
_PROTECTED:
begin
consume(_PROTECTED);
current_structdef.symtable.currentvisibility:=vis_strictprotected;
include(current_structdef.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;
is_classdef:=false;
classfields:=false;
object_member_blocktype:=bt_general;
end
else
begin
if object_member_blocktype=bt_general then
begin
if is_interface(current_structdef) or
is_objc_protocol_or_category(current_structdef) or
is_objectpascal_helper(current_structdef) then
Message(parser_e_no_vars_in_interfaces);
if (current_structdef.symtable.currentvisibility=vis_published) and
not(oo_can_have_published in current_structdef.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
struct_property_dec(is_classdef);
fields_allowed:=false;
is_classdef:=false;
end;
_CLASS:
begin
is_classdef:=false;
{ read class method/field/property }
consume(_CLASS);
{ 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_structdef) then
Message(parser_e_no_static_method_in_interfaces)
else
{ class methods are also allowed for Objective-C protocols }
is_classdef:=true;
end;
_PROCEDURE,
_FUNCTION:
begin
if (current_structdef.symtable.currentvisibility=vis_published) and
not(oo_can_have_published in current_structdef.objectoptions) then
Message(parser_e_cant_have_published);
oldparse_only:=parse_only;
parse_only:=true;
pd:=parse_proc_dec(is_classdef,current_structdef);
{ 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.struct) and not (po_dispid in pd.procoptions) then
begin
pd.dispid:=tobjectdef(pd.struct).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_structdef.objectoptions,oo_has_msgint);
if (po_msgstr in pd.procoptions) then
include(current_structdef.objectoptions,oo_has_msgstr);
if (po_virtualmethod in pd.procoptions) then
include(current_structdef.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_structdef.symtable.currentvisibility=vis_published) and
not(oo_can_have_published in current_structdef.objectoptions) then
Message(parser_e_cant_have_published);
if not is_classdef and not(current_structdef.symtable.currentvisibility in [vis_public,vis_published]) then
Message(parser_w_constructor_should_be_public);
if is_interface(current_structdef) 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_structdef) then
Message(parser_e_objc_no_constructor_destructor);
{ only 1 class constructor is allowed }
if is_classdef and (oo_has_class_constructor in current_structdef.objectoptions) then
Message1(parser_e_only_one_class_constructor_allowed, current_structdef.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_structdef.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_structdef.symtable.currentvisibility=vis_published) and
not(oo_can_have_published in current_structdef.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_structdef) then
Message(parser_e_no_con_des_in_interfaces);
{ (class) destructors are not allowed in class helpers }
if is_objectpascal_helper(current_structdef) then
Message(parser_e_no_destructor_in_records);
if not is_classdef and (current_structdef.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_structdef) then
Message(parser_e_objc_no_constructor_destructor);
{ only 1 class destructor is allowed }
if is_classdef and (oo_has_class_destructor in current_structdef.objectoptions) then
Message1(parser_e_only_one_class_destructor_allowed, current_structdef.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_structdef.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;
end;
function object_dec(objecttype:tobjecttyp;const n:tidstring;genericdef:tstoreddef;genericlist:TFPObjectList;fd : tobjectdef;helpertype:thelpertype) : tobjectdef;
var
old_current_structdef: tabstractrecorddef;
old_current_genericdef,
old_current_specializedef: tstoreddef;
old_parse_generic: boolean;
begin
old_current_structdef:=current_structdef;
old_current_genericdef:=current_genericdef;
old_current_specializedef:=current_specializedef;
old_parse_generic:=parse_generic;
current_structdef:=nil;
current_genericdef:=nil;
current_specializedef:=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_structdef:=tobjectdef.create(current_objectdef.objecttype,n,nil);
include(current_structdef.objectoptions,oo_is_forward);
end
else
current_structdef:=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_structdef:=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_structdef.objectoptions,oo_is_forward);
if (cs_compilesystem in current_settings.moduleswitches) then
begin
case current_objectdef.objecttype of
odt_interfacecom :
if (current_structdef.objname^='IUNKNOWN') then
interface_iunknown:=current_objectdef
else
if (current_structdef.objname^='IDISPATCH') then
interface_idispatch:=current_objectdef;
odt_class :
if (current_structdef.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;
{ usage of specialized type inside its generic template }
if assigned(genericdef) then
current_specializedef:=current_structdef
{ reject declaration of generic class inside generic class }
else if assigned(genericlist) then
current_genericdef:=current_structdef;
{ 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_structdef.objectoptions,oo_can_have_published);
{ Objective-C objectdefs can be "formal definitions", in which case
the syntax is "type tc = objcclass external;" -> we have to parse
its object options (external) already here, to make sure that such
definitions are recognised as formal defs }
if objecttype in [odt_objcclass,odt_objcprotocol,odt_objccategory] then
parse_object_options;
{ 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_structdef);
end
else
begin
{ change objccategories into objcclass helpers }
if (objecttype=odt_objccategory) then
begin
current_objectdef.objecttype:=odt_objcclass;
include(current_structdef.objectoptions,oo_is_classhelper);
end;
{ include the class helper flag for Object Pascal helpers }
if (objecttype=odt_helper) then
include(current_objectdef.objectoptions,oo_is_classhelper);
{ parse list of options (abstract / sealed) }
if not(objecttype in [odt_objcclass,odt_objcprotocol,odt_objccategory]) then
parse_object_options;
symtablestack.push(current_structdef.symtable);
insert_generic_parameter_types(current_structdef,genericdef,genericlist);
parse_generic:=(df_generic in current_structdef.defoptions);
{ parse list of parent classes }
parse_parent_classes;
{ parse extended type for helpers }
if is_objectpascal_helper(current_structdef) then
parse_extended_class(helpertype);
{ parse optional GUID for interfaces }
parse_guid;
{ parse and insert object members }
parse_object_members;
symtablestack.pop(current_structdef.symtable);
end;
{ generate vmt space if needed }
if not(oo_has_vmt in current_structdef.objectoptions) and
not(oo_is_forward in current_structdef.objectoptions) and
(
([oo_has_virtual,oo_has_constructor,oo_has_destructor]*current_structdef.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_structdef.objectoptions) and
not(oo_is_forward in current_structdef.objectoptions) and
not(oo_has_constructor in current_structdef.objectoptions) and
not is_objc_class_or_protocol(current_structdef) then
Message1(parser_w_virtual_without_constructor,current_structdef.objrealname^);
if is_interface(current_structdef) or
is_objcprotocol(current_structdef) then
setinterfacemethodoptions
else if is_objcclass(current_structdef) then
setobjcclassmethodoptions;
{ return defined objectdef }
result:=current_objectdef;
{ restore old state }
current_structdef:=old_current_structdef;
current_genericdef:=old_current_genericdef;
current_specializedef:=old_current_specializedef;
parse_generic:=old_parse_generic;
end;
end.
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