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Version:
3.0.0 ▾
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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;
{$i fpcdefs.inc}
interface
uses
cclasses,
globtype,symconst,symtype,symdef;
{ parses a object declaration }
function object_dec(objecttype:tobjecttyp;const n:tidstring;objsym:tsym;genericdef:tstoreddef;genericlist:tfphashobjectlist;fd : tobjectdef;helpertype:thelpertype) : tobjectdef;
{ parses a (class) method declaration }
function method_dec(astruct: tabstractrecorddef; is_classdef: boolean): tprocdef;
function class_constructor_head(astruct: tabstractrecorddef):tprocdef;
function class_destructor_head(astruct: tabstractrecorddef):tprocdef;
function constructor_head:tprocdef;
function destructor_head:tprocdef;
procedure struct_property_dec(is_classproperty:boolean);
implementation
uses
sysutils,cutils,
globals,verbose,systems,tokens,
symbase,symsym,symtable,symcreat,defcmp,
node,nld,nmem,ncon,ncnv,ncal,
fmodule,scanner,
pbase,pexpr,pdecsub,pdecvar,ptype,pdecl,pgenutil,ppu,
{$ifdef jvm}
pjvm,
{$endif}
parabase
;
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;
procedure constr_destr_finish_head(pd: tprocdef; const astruct: tabstractrecorddef);
begin
case astruct.typ of
recorddef:
begin
parse_record_proc_directives(pd);
// we can't add hidden params here because record is not yet defined
// and therefore record size which has influence on paramter passing rules may change too
// look at record_dec to see where calling conventions are applied (issue #0021044)
handle_calling_convention(pd,[hcc_check]);
end;
objectdef:
begin
parse_object_proc_directives(pd);
handle_calling_convention(pd);
end
else
internalerror(2011040502);
end;
{ add definition to procsym }
proc_add_definition(pd);
{ add procdef options to objectdef options }
if (po_virtualmethod in pd.procoptions) then
include(astruct.objectoptions,oo_has_virtual);
maybe_parse_hint_directives(pd);
end;
function class_constructor_head(astruct: tabstractrecorddef):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(astruct.objectoptions,oo_has_class_constructor);
current_module.flags:=current_module.flags or uf_classinits;
{ no return value }
pd.returndef:=voidtype;
constr_destr_finish_head(pd,astruct);
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, helper types return the extended type,
object constructors return boolean }
if is_class(pd.struct) or
is_record(pd.struct) or
is_javaclass(pd.struct) then
pd.returndef:=pd.struct
else
if is_objectpascal_helper(pd.struct) then
pd.returndef:=tobjectdef(pd.struct).extendeddef
else
{$ifdef CPU64bitaddr}
pd.returndef:=bool64type;
{$else CPU64bitaddr}
pd.returndef:=bool32type;
{$endif CPU64bitaddr}
constr_destr_finish_head(pd,pd.struct);
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 is_java_class_or_interface(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(astruct: tabstractrecorddef):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(astruct.objectoptions,oo_has_class_destructor);
current_module.flags:=current_module.flags or uf_classinits;
{ no return value }
pd.returndef:=voidtype;
constr_destr_finish_head(pd,astruct);
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);
include(current_structdef.objectoptions,oo_has_new_destructor);
{ no return value }
pd.returndef:=voidtype;
constr_destr_finish_head(pd,pd.struct);
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 ([oo_is_forward,oo_is_formal] * intfdef.objectoptions <> []) then
begin
Message1(parser_e_forward_intf_declaration_must_be_resolved,intfdef.objrealname^);
exit;
end;
if find_implemented_interface(current_objectdef,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 handleImplementedProtocolOrJavaIntf(intfdef : tobjectdef);
begin
intfdef:=find_real_class_definition(intfdef,false);
case current_objectdef.objecttype of
odt_objcclass,
odt_objccategory,
odt_objcprotocol:
if not is_objcprotocol(intfdef) then
begin
Message1(type_e_protocol_type_expected,intfdef.typename);
exit;
end;
odt_javaclass,
odt_interfacejava:
if not is_javainterface(intfdef) then
begin
Message1(type_e_interface_type_expected,intfdef.typename);
exit
end;
else
internalerror(2011010807);
end;
if ([oo_is_forward,oo_is_formal] * intfdef.objectoptions <> []) then
begin
Message1(parser_e_forward_intf_declaration_must_be_resolved,intfdef.objrealname^);
exit;
end;
if find_implemented_interface(current_objectdef,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
handleImplementedProtocolOrJavaIntf(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_or_java_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
hs:='';
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;
end;
if hs<>'' then
begin
{ the JVM expects java/lang/Object rather than java.lang.Object }
if target_info.system in systems_jvm then
Replace(hs,'.','/');
stringdispose(od.import_lib);
od.import_lib:=stringdup(hs);
end;
{ 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
begin
od.objextname:=stringdup(od.objrealname^);
end;
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;
var
gotexternal: boolean;
begin
case current_objectdef.objecttype of
odt_object,odt_class,
odt_javaclass:
begin
gotexternal:=false;
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 if (current_objectdef.objecttype=odt_javaclass) and
(token=_ID) and
(idtoken=_EXTERNAL) then
begin
get_cpp_or_java_class_external_status(current_objectdef);
gotexternal:=true;
end
else
break;
end;
{ don't use <=, because there's a bug in the 2.6.0 SPARC code
generator regarding handling this expression }
if ([oo_is_abstract, oo_is_sealed] * current_structdef.objectoptions) = [oo_is_abstract, oo_is_sealed] then
Message(parser_e_abstract_and_sealed_conflict);
{ set default external name in case of no external directive }
if (current_objectdef.objecttype=odt_javaclass) and
not gotexternal then
get_cpp_or_java_class_external_status(current_objectdef)
end;
odt_cppclass,
odt_interfacejava:
get_cpp_or_java_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,
odt_javaclass:
if (childof.objecttype<>current_objectdef.objecttype) then
begin
if (is_interface(childof) and
is_class(current_objectdef)) or
(is_javainterface(childof) and
is_javaclass(current_objectdef)) 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)
else
childof:=find_real_class_definition(childof,true);
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_class_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_interfacejava:
begin
if not(is_javainterface(childof)) then
Message(parser_e_mix_of_classes_and_objects);
intfchildof:=find_real_class_definition(childof,true);
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);
odt_javaclass:
{ inherit from TObject by default for compatibility }
if current_objectdef<>java_jlobject then
childof:=class_tobject;
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_formal_class_not_resolved,childof.objrealname^);
end;
if hasparentdefined then
begin
if current_objectdef.objecttype in [odt_class,odt_objcclass,odt_objcprotocol,odt_javaclass,odt_interfacejava] then
begin
if assigned(intfchildof) then
if current_objectdef.objecttype=odt_class then
handleImplementedInterface(intfchildof)
else
handleImplementedProtocolOrJavaIntf(intfchildof);
readImplementedInterfacesAndProtocols(current_objectdef.objecttype=odt_class);
end;
consume(_RKLAMMER);
end;
{ remove forward flag, is resolved }
exclude(current_structdef.objectoptions,oo_is_forward);
end;
procedure parse_extended_type(helpertype:thelpertype);
procedure validate_extendeddef_typehelper(var def:tdef);
begin
if def.typ in [undefineddef,procvardef,procdef,objectdef,recorddef,
filedef,classrefdef,abstractdef,forwarddef,formaldef] then
begin
Message1(type_e_type_not_allowed_for_type_helper,def.typename);
def:=generrordef;
end;
end;
procedure check_inheritance_record_type_helper(var def:tdef);
begin
if (def.typ<>errordef) and assigned(current_objectdef.childof) then
begin
if def<>current_objectdef.childof.extendeddef then
begin
Message1(type_e_record_helper_must_extend_same_record,current_objectdef.childof.extendeddef.typename);
def:=generrordef;
end;
end;
end;
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,[stoParseClassParent]);
if not assigned(hdef) or (hdef.typ=errordef) then
begin
case helpertype of
ht_class:
Message1(type_e_class_type_expected,hdef.typename);
ht_record:
Message(type_e_record_type_expected);
ht_type:
Message1(type_e_type_id_expected,hdef.typename);
end;
end
else
begin
case helpertype of
ht_class:
if (hdef.typ<>objectdef) or
not is_class(hdef) then
Message1(type_e_class_type_expected,hdef.typename)
else
begin
{ 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 def_is_related(hdef,current_objectdef.childof.extendeddef) then
Message1(type_e_class_helper_must_extend_subclass,current_objectdef.childof.extendeddef.typename);
end;
end;
ht_record:
if (hdef.typ=objectdef) or
(
{ primitive types are allowed for record helpers in mode
delphi }
(hdef.typ<>recorddef) and
not (m_type_helpers in current_settings.modeswitches)
) then
Message1(type_e_record_type_expected,hdef.typename)
else
begin
if hdef.typ<>recorddef then
{ this is a primitive type in mode delphi, so validate
the def }
validate_extendeddef_typehelper(hdef);
{ a record helper must extend the same record as the
parent helper }
check_inheritance_record_type_helper(hdef);
end;
ht_type:
begin
validate_extendeddef_typehelper(hdef);
{ a type helper must extend the same type as the
parent helper }
check_inheritance_record_type_helper(hdef);
end;
end;
end;
if assigned(hdef) then
current_objectdef.extendeddef:=hdef
else
current_objectdef.extendeddef:=generrordef;
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;
function method_dec(astruct: tabstractrecorddef; is_classdef: boolean): tprocdef;
procedure chkobjc(pd: tprocdef);
begin
if is_objc_class_or_protocol(pd.struct) then
begin
include(pd.procoptions,po_objc);
end;
end;
procedure chkjava(pd: tprocdef);
begin
{$ifdef jvm}
if is_java_class_or_interface(pd.struct) then
begin
{ mark all non-virtual instance methods as "virtual; final;",
because
a) that's the only way to guarantee "non-virtual" behaviour
(other than making them class methods with an explicit self
pointer, but that causes problems with interface mappings
and procvars)
b) if we don't mark them virtual, they don't get added to the
vmt and we can't check whether child classes try to override
them
}
if is_javaclass(pd.struct) then
begin
if not(po_virtualmethod in pd.procoptions) and
not(po_classmethod in pd.procoptions) then
begin
include(pd.procoptions,po_virtualmethod);
include(pd.procoptions,po_finalmethod);
include(pd.procoptions,po_java_nonvirtual);
end
else if [po_virtualmethod,po_classmethod]<=pd.procoptions then
begin
if po_staticmethod in pd.procoptions then
Message(type_e_java_class_method_not_static_virtual);
end;
end;
end;
{$endif}
end;
procedure chkcpp(pd:tprocdef);
begin
{ nothing currently }
end;
var
oldparse_only: boolean;
begin
case token of
_PROCEDURE,
_FUNCTION:
begin
if (astruct.symtable.currentvisibility=vis_published) and
not(oo_can_have_published in astruct.objectoptions) then
Message(parser_e_cant_have_published);
oldparse_only:=parse_only;
parse_only:=true;
result:=parse_proc_dec(is_classdef,astruct);
{ this is for error recovery as well as forward }
{ interface mappings, i.e. mapping to a method }
{ which isn't declared yet }
if assigned(result) then
begin
parse_object_proc_directives(result);
{ check if dispid is set }
if is_dispinterface(result.struct) and not (po_dispid in result.procoptions) then
begin
result.dispid:=tobjectdef(result.struct).get_next_dispid;
include(result.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(result.procoptions,po_virtualmethod);
{ for record and type helpers only static class methods are
allowed }
if is_objectpascal_helper(astruct) and
(tobjectdef(astruct).extendeddef.typ<>objectdef) and
is_classdef and not (po_staticmethod in result.procoptions) then
MessagePos(result.fileinfo,parser_e_class_methods_only_static_in_records);
handle_calling_convention(result);
{ add definition to procsym }
proc_add_definition(result);
{ add procdef options to objectdef options }
if (po_msgint in result.procoptions) then
include(astruct.objectoptions,oo_has_msgint);
if (po_msgstr in result.procoptions) then
include(astruct.objectoptions,oo_has_msgstr);
if (po_virtualmethod in result.procoptions) then
include(astruct.objectoptions,oo_has_virtual);
chkcpp(result);
chkobjc(result);
chkjava(result);
end;
maybe_parse_hint_directives(result);
parse_only:=oldparse_only;
end;
_CONSTRUCTOR :
begin
if (astruct.symtable.currentvisibility=vis_published) and
not(oo_can_have_published in astruct.objectoptions) then
Message(parser_e_cant_have_published);
if not is_classdef and not(astruct.symtable.currentvisibility in [vis_public,vis_published]) then
Message(parser_w_constructor_should_be_public);
if is_interface(astruct) 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(astruct) then
Message(parser_e_objc_no_constructor_destructor);
if is_objectpascal_helper(astruct) then
if is_classdef then
{ class constructors are not allowed in class helpers }
Message(parser_e_no_class_constructor_in_helpers);
{ only 1 class constructor is allowed }
if is_classdef and (oo_has_class_constructor in astruct.objectoptions) then
Message1(parser_e_only_one_class_constructor_allowed, astruct.objrealname^);
oldparse_only:=parse_only;
parse_only:=true;
if is_classdef then
result:=class_constructor_head(current_structdef)
else
begin
result:=constructor_head;
if is_objectpascal_helper(astruct) and
(tobjectdef(astruct).extendeddef.typ<>objectdef) and
(result.minparacount=0) then
{ as long as parameterless constructors aren't allowed in records they
aren't allowed in record/type helpers either }
MessagePos(result.procsym.fileinfo,parser_e_no_parameterless_constructor_in_records);
end;
chkcpp(result);
parse_only:=oldparse_only;
end;
_DESTRUCTOR :
begin
if (astruct.symtable.currentvisibility=vis_published) and
not(oo_can_have_published in astruct.objectoptions) then
Message(parser_e_cant_have_published);
if not is_classdef then
if (oo_has_new_destructor in astruct.objectoptions) then
Message(parser_n_only_one_destructor);
if is_interface(astruct) then
Message(parser_e_no_con_des_in_interfaces);
{ (class) destructors are not allowed in class helpers }
if is_objectpascal_helper(astruct) then
Message(parser_e_no_destructor_in_records);
if not is_classdef and (astruct.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(astruct) then
Message(parser_e_objc_no_constructor_destructor);
{ only 1 class destructor is allowed }
if is_classdef and (oo_has_class_destructor in astruct.objectoptions) then
Message1(parser_e_only_one_class_destructor_allowed, astruct.objrealname^);
oldparse_only:=parse_only;
parse_only:=true;
if is_classdef then
result:=class_destructor_head(current_structdef)
else
result:=destructor_head;
chkcpp(result);
parse_only:=oldparse_only;
end;
else
internalerror(2011032102);
end;
end;
procedure parse_object_members;
var
typedconstswritable: boolean;
object_member_blocktype : tblock_type;
fields_allowed, is_classdef, class_fields, is_final, final_fields: boolean;
vdoptions: tvar_dec_options;
fieldlist: tfpobjectlist;
procedure parse_const;
begin
if not(current_objectdef.objecttype in [odt_class,odt_object,odt_helper,odt_javaclass,odt_interfacejava]) then
Message(parser_e_type_var_const_only_in_records_and_classes);
consume(_CONST);
object_member_blocktype:=bt_const;
final_fields:=is_final;
is_final:=false;
end;
procedure parse_var;
begin
if not(current_objectdef.objecttype in [odt_class,odt_object,odt_helper,odt_javaclass]) and
{ Java interfaces can contain static final class vars }
not((current_objectdef.objecttype=odt_interfacejava) and
is_final and is_classdef) then
Message(parser_e_type_var_const_only_in_records_and_classes);
consume(_VAR);
fields_allowed:=true;
object_member_blocktype:=bt_general;
class_fields:=is_classdef;
final_fields:=is_final;
is_classdef:=false;
is_final:=false;
end;
procedure parse_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);
{ Java interfaces can contain final class vars }
if is_interface(current_structdef) or
(is_javainterface(current_structdef) and
(not(is_final) or
(token<>_VAR))) then
Message(parser_e_no_static_method_in_interfaces)
else
{ class methods are also allowed for Objective-C protocols }
is_classdef:=true;
end;
procedure parse_visibility(vis: tvisibility; oo: tobjectoption);
begin
{ Objective-C and Java classes do not support "published",
as basically everything is published. }
if (vis=vis_published) and
(is_objc_class_or_protocol(current_structdef) or
is_java_class_or_interface(current_structdef)) then
Message(parser_e_no_objc_published)
else if is_interface(current_structdef) or
is_objc_protocol_or_category(current_structdef) or
is_javainterface(current_structdef) then
Message(parser_e_no_access_specifier_in_interfaces);
current_structdef.symtable.currentvisibility:=vis;
consume(token);
if (oo<>oo_none) then
include(current_structdef.objectoptions,oo);
fields_allowed:=true;
is_classdef:=false;
class_fields:=false;
is_final:=false;
object_member_blocktype:=bt_general;
end;
begin
{ empty class declaration ? }
if (current_objectdef.objecttype in [odt_class,odt_objcclass,odt_javaclass]) 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;
fields_allowed:=true;
is_classdef:=false;
class_fields:=false;
is_final:=false;
final_fields:=false;
object_member_blocktype:=bt_general;
fieldlist:=tfpobjectlist.create(false);
repeat
case token of
_TYPE :
begin
if not(current_objectdef.objecttype in [odt_class,odt_object,odt_helper,odt_javaclass,odt_interfacejava]) then
Message(parser_e_type_var_const_only_in_records_and_classes);
consume(_TYPE);
object_member_blocktype:=bt_type;
end;
_VAR :
begin
parse_var;
end;
_CONST:
begin
parse_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
parse_visibility(vis_private,oo_has_private);
end;
_PROTECTED :
begin
parse_visibility(vis_protected,oo_has_protected);
end;
_PUBLIC :
begin
parse_visibility(vis_public,oo_none);
end;
_PUBLISHED :
begin
parse_visibility(vis_published,oo_none);
end;
_STRICT :
begin
if is_interface(current_structdef) or
is_objc_protocol_or_category(current_structdef) or
is_javainterface(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;
class_fields:=false;
is_final:=false;
final_fields:=false;
object_member_blocktype:=bt_general;
end
else if (m_final_fields in current_settings.modeswitches) and
(token=_ID) and
(idtoken=_FINAL) then
begin
{ currently only supported for external classes, because
requires fully working DFA otherwise }
if (current_structdef.typ<>objectdef) or
not(oo_is_external in tobjectdef(current_structdef).objectoptions) then
Message(parser_e_final_only_external);
consume(_final);
is_final:=true;
if token=_CLASS then
parse_class;
if not(token in [_CONST,_VAR]) then
message(parser_e_final_only_const_var);
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) and
not class_fields
) or
(is_javainterface(current_structdef) and
not(class_fields and final_fields)) 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 class_fields then
include(vdoptions,vd_class);
if is_class(current_structdef) then
include(vdoptions,vd_canreorder);
if final_fields then
include(vdoptions,vd_final);
read_record_fields(vdoptions,fieldlist,nil);
end
else if object_member_blocktype=bt_type then
types_dec(true)
else if object_member_blocktype=bt_const then
begin
typedconstswritable:=false;
if final_fields then
begin
{ the value of final fields cannot be changed
once they've been assigned a value }
typedconstswritable:=cs_typed_const_writable in current_settings.localswitches;
exclude(current_settings.localswitches,cs_typed_const_writable);
end;
consts_dec(true,not is_javainterface(current_structdef));
if final_fields and
typedconstswritable then
include(current_settings.localswitches,cs_typed_const_writable);
end
else
internalerror(201001110);
end;
end;
end;
_PROPERTY :
begin
struct_property_dec(is_classdef);
fields_allowed:=false;
is_classdef:=false;
end;
_CLASS:
begin
parse_class;
end;
_PROCEDURE,
_FUNCTION,
_CONSTRUCTOR,
_DESTRUCTOR :
begin
method_dec(current_structdef,is_classdef);
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;
if is_class(current_structdef) then
tabstractrecordsymtable(current_structdef.symtable).addfieldlist(fieldlist,true);
fieldlist.free;
end;
function object_dec(objecttype:tobjecttyp;const n:tidstring;objsym:tsym;genericdef:tstoreddef;genericlist:tfphashobjectlist;fd : tobjectdef;helpertype:thelpertype) : tobjectdef;
var
old_current_structdef: tabstractrecorddef;
old_current_genericdef,
old_current_specializedef: tstoreddef;
hrecst: trecordsymtable;
fsym: tfieldvarsym;
old_parse_generic: boolean;
list: TFPObjectList;
s: String;
st: TSymtable;
olddef: tdef;
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,recordsymtable]) 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:=cobjectdef.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:=cobjectdef.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;
odt_javaclass:
begin
if (current_structdef.objname^='TOBJECT') then
class_tobject:=current_objectdef
else if (current_objectdef.objname^='JLOBJECT') then
java_jlobject:=current_objectdef
else if (current_objectdef.objname^='JLTHROWABLE') then
java_jlthrowable:=current_objectdef
else if (current_objectdef.objname^='FPCBASERECORDTYPE') then
java_fpcbaserecordtype:=current_objectdef
else if (current_objectdef.objname^='JLSTRING') then
java_jlstring:=current_objectdef
else if (current_objectdef.objname^='ANSISTRINGCLASS') then
java_ansistring:=current_objectdef
else if (current_objectdef.objname^='SHORTSTRINGCLASS') then
java_shortstring:=current_objectdef
else if (current_objectdef.objname^='JLENUM') then
java_jlenum:=current_objectdef
else if (current_objectdef.objname^='JUENUMSET') then
java_juenumset:=current_objectdef
else if (current_objectdef.objname^='FPCBITSET') then
java_jubitset:=current_objectdef
else if (current_objectdef.objname^='FPCBASEPROCVARTYPE') then
java_procvarbase:=current_objectdef;
end;
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 }
if assigned(genericlist) then
current_genericdef:=current_structdef;
{ nested types of specializations are specializations as well }
if assigned(old_current_structdef) and
(df_specialization in old_current_structdef.defoptions) then
include(current_structdef.defoptions,df_specialization);
if assigned(old_current_structdef) and
(df_generic in old_current_structdef.defoptions) then
begin
include(current_structdef.defoptions,df_generic);
current_genericdef:=current_structdef;
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,odt_helper]) then
include(current_structdef.objectoptions,oo_can_have_published);
{ Objective-C/Java 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,odt_javaclass,odt_interfacejava] 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,odt_javaclass,odt_interfacejava]) then
parse_object_options;
symtablestack.push(current_structdef.symtable);
insert_generic_parameter_types(current_structdef,genericdef,genericlist);
{ when we are parsing a generic already then this is a generic as
well }
if old_parse_generic then
include(current_structdef.defoptions, df_generic);
parse_generic:=(df_generic in current_structdef.defoptions);
{ in non-Delphi modes we need a strict private symbol without type
count and type parameters in the name to simply resolving }
maybe_insert_generic_rename_symbol(n,genericlist);
{ parse list of parent classes }
{ for record helpers in mode Delphi this is not allowed }
if not (is_objectpascal_helper(current_objectdef) and
(m_delphi in current_settings.modeswitches) and
(helpertype=ht_record)) then
parse_parent_classes
else
{ remove forward flag, is resolved (this is normally done inside
parse_parent_classes) }
exclude(current_structdef.objectoptions,oo_is_forward);
{ parse extended type for helpers }
if is_objectpascal_helper(current_structdef) then
parse_extended_type(helpertype);
{ parse optional GUID for interfaces }
parse_guid;
{ classes can handle links to themself not only inside type blocks
but in const blocks too. Additionally this is needed to parse parameters that are
specializations of the currently parsed type in basically everything except C++ and
ObjC classes. To make this possible we need to set their symbols to real defs instead
of errordef }
if assigned(objsym) and not (objecttype in [odt_cppclass,odt_objccategory,odt_objcclass,odt_objcprotocol]) then
begin
olddef:=ttypesym(objsym).typedef;
ttypesym(objsym).typedef:=current_structdef;
current_structdef.typesym:=objsym;
end
else
olddef:=nil;
{ parse and insert object members }
parse_object_members;
if assigned(olddef) then
begin
ttypesym(objsym).typedef:=olddef;
current_structdef.typesym:=nil;
end;
if not(oo_is_external in current_structdef.objectoptions) then
begin
{ In Java, constructors are not automatically inherited (so you can
hide them). Emulate the Pascal behaviour for classes implemented
in Pascal (we cannot do it for classes implemented in Java, since
we obviously cannot add constructors to those) }
if is_javaclass(current_structdef) then
begin
add_missing_parent_constructors_intf(tobjectdef(current_structdef),true,vis_none);
{$ifdef jvm}
maybe_add_public_default_java_constructor(tobjectdef(current_structdef));
jvm_wrap_virtual_class_methods(tobjectdef(current_structdef));
{$endif}
end;
{ need method to hold the initialization code for typed constants? }
if (target_info.system in systems_typed_constants_node_init) and
not is_any_interface_kind(current_structdef) then
add_typedconst_init_routine(current_structdef);
end;
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
{ no vmt for helpers ever }
not is_objectpascal_helper(current_structdef) 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) and
not is_java_class_or_interface(current_structdef) then
Message1(parser_w_virtual_without_constructor,current_structdef.objrealname^);
if is_interface(current_structdef) or
is_objcprotocol(current_structdef) or
is_javainterface(current_structdef) then
setinterfacemethodoptions
else if is_objcclass(current_structdef) then
setobjcclassmethodoptions;
{ we need to add this helper to the extendeddefs of the current module,
as the global and static symtable are not pushed onto the symtable
stack again (it will be removed when poping the symtable) }
if is_objectpascal_helper(current_structdef) and
(current_objectdef.extendeddef.typ<>errordef) then
begin
{ the topmost symtable must be a static symtable }
st:=current_structdef.owner;
while st.symtabletype in [objectsymtable,recordsymtable] do
st:=st.defowner.owner;
if st.symtabletype in [staticsymtable,globalsymtable] then
begin
if current_objectdef.extendeddef.typ in [recorddef,objectdef] then
s:=make_mangledname('',tabstractrecorddef(current_objectdef.extendeddef).symtable,'')
else
s:=make_mangledname('',current_objectdef.extendeddef.owner,current_objectdef.extendeddef.typesym.name);
Message1(sym_d_adding_helper_for,s);
list:=TFPObjectList(current_module.extendeddefs.Find(s));
if not assigned(list) then
begin
list:=TFPObjectList.Create(false);
current_module.extendeddefs.Add(s, list);
end;
list.add(current_structdef);
end;
end;
tabstractrecordsymtable(current_objectdef.symtable).addalignmentpadding;
{ 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.