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{
Copyright (c) 2009 by Jonas Maebe
This unit implements Objective-C nodes
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.
****************************************************************************
}
{ @abstract(This unit implements Objective-C nodes)
This unit contains various nodes to implement Objective-Pascal and to
interface with the Objective-C runtime.
}
unit nobjc;
{$i fpcdefs.inc}
interface
uses
node;
type
tobjcselectornode = class(tunarynode)
public
constructor create(formethod: tnode);
function pass_typecheck: tnode;override;
function pass_1: tnode;override;
end;
tobjcselectornodeclass = class of tobjcselectornode;
tobjcprotocolnode = class(tunarynode)
public
constructor create(forprotocol: tnode);
function pass_typecheck: tnode;override;
function pass_1: tnode;override;
end;
tobjcprotocolnodeclass = class of tobjcprotocolnode;
var
cobjcselectornode : tobjcselectornodeclass;
cobjcprotocolnode : tobjcprotocolnodeclass;
implementation
uses
sysutils,
globtype,globals,cclasses,systems,
verbose,pass_1,
defutil,
symtype,symtable,symdef,symconst,symsym,
paramgr,
nutils,
nbas,nld,ncnv,ncon,ncal,nmem,
objcutil,
cgbase;
{*****************************************************************************
TOBJCSELECTORNODE
*****************************************************************************}
constructor tobjcselectornode.create(formethod: tnode);
begin
inherited create(objcselectorn,formethod);
end;
function tobjcselectornode.pass_typecheck: tnode;
var
len: longint;
s: shortstring;
begin
if not(m_objectivec1 in current_settings.modeswitches) then
Message(parser_f_modeswitch_objc_required);
result:=nil;
typecheckpass(left);
{ argument can be
a) an objc method
b) a pchar, zero-based chararray or ansistring
}
case left.nodetype of
loadn:
begin
if (left.resultdef.typ=procdef) and
(po_objc in tprocdef(left.resultdef).procoptions) then
begin
{ ok }
end
else
CGMessage1(type_e_expected_objc_method_but_got,left.resultdef.typename);
end;
stringconstn:
begin
if not objcvalidselectorname(tstringconstnode(left).value_str,
tstringconstnode(left).len) then
begin
len:=tstringconstnode(left).len;
if (len>255) then
len:=255;
setlength(s,len);
move(tstringconstnode(left).value_str^,s[1],len);
CGMessage1(type_e_invalid_objc_selector_name,s);
exit;
end;
end
else
CGMessage(type_e_expected_objc_method);
end;
resultdef:=objc_seltype;
end;
function tobjcselectornode.pass_1: tnode;
begin
result:=nil;
expectloc:=LOC_CREFERENCE;
end;
{*****************************************************************************
TOBJPROTOCOLNODE
*****************************************************************************}
constructor tobjcprotocolnode.create(forprotocol: tnode);
begin
inherited create(objcprotocoln,forprotocol);
end;
function tobjcprotocolnode.pass_typecheck: tnode;
begin
if not(m_objectivec1 in current_settings.modeswitches) then
Message(parser_f_modeswitch_objc_required);
result:=nil;
typecheckpass(left);
if (left.nodetype<>typen) then
MessagePos(left.fileinfo,type_e_type_id_expected)
else if not is_objcprotocol(left.resultdef) then
MessagePos2(left.fileinfo,type_e_incompatible_types,left.resultdef.typename,'ObjCProtocol');
resultdef:=objc_protocoltype;
end;
function tobjcprotocolnode.pass_1: tnode;
begin
result:=ccallnode.createinternresfromunit('OBJC','OBJC_GETPROTOCOL',
ccallparanode.create(cstringconstnode.createstr(tobjectdef(left.resultdef).objextname^),nil),
resultdef
);
typecheckpass(result);
end;
end.
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