mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-10-31 15:31:29 +01:00
f8754d8fab
implemented in Pascal). See
http://wiki.freepascal.org/FPC_PasCocoa#Category_declaration for syntax
details
git-svn-id: trunk@14196 -
747 lines
27 KiB
ObjectPascal
747 lines
27 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Florian Klaempfl
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Does declaration (but not type) parsing for Free Pascal
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit pdecl;
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{$i fpcdefs.inc}
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interface
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uses
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{ global }
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globtype,
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{ symtable }
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symsym,
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{ pass_1 }
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node;
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function readconstant(const orgname:string;const filepos:tfileposinfo):tconstsym;
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procedure const_dec;
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procedure label_dec;
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procedure type_dec;
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procedure types_dec;
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procedure var_dec;
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procedure threadvar_dec;
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procedure property_dec;
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procedure resourcestring_dec;
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implementation
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uses
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SysUtils,
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{ common }
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cutils,cclasses,
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{ global }
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globals,tokens,verbose,widestr,constexp,
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systems,
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{ aasm }
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aasmbase,aasmtai,aasmdata,fmodule,
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{ symtable }
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symconst,symbase,symtype,symdef,symtable,paramgr,defutil,
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{ pass 1 }
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nmat,nadd,ncal,nset,ncnv,ninl,ncon,nld,nflw,nobj,
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{ codegen }
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ncgutil,
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{ parser }
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scanner,
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pbase,pexpr,ptype,ptconst,pdecsub,pdecvar,pdecobj,
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{ cpu-information }
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cpuinfo
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;
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function readconstant(const orgname:string;const filepos:tfileposinfo):tconstsym;
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var
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hp : tconstsym;
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p : tnode;
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ps : pconstset;
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pd : pbestreal;
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pg : pguid;
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sp : pchar;
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pw : pcompilerwidestring;
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storetokenpos : tfileposinfo;
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begin
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readconstant:=nil;
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if orgname='' then
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internalerror(9584582);
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hp:=nil;
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p:=comp_expr(true);
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storetokenpos:=current_tokenpos;
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current_tokenpos:=filepos;
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case p.nodetype of
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ordconstn:
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begin
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if p.resultdef.typ=pointerdef then
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hp:=tconstsym.create_ordptr(orgname,constpointer,tordconstnode(p).value.uvalue,p.resultdef)
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else
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hp:=tconstsym.create_ord(orgname,constord,tordconstnode(p).value,p.resultdef);
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end;
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stringconstn:
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begin
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if is_wide_or_unicode_string(p.resultdef) then
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begin
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initwidestring(pw);
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copywidestring(pcompilerwidestring(tstringconstnode(p).value_str),pw);
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hp:=tconstsym.create_wstring(orgname,constwstring,pw);
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end
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else
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begin
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getmem(sp,tstringconstnode(p).len+1);
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move(tstringconstnode(p).value_str^,sp^,tstringconstnode(p).len+1);
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hp:=tconstsym.create_string(orgname,conststring,sp,tstringconstnode(p).len);
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end;
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end;
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realconstn :
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begin
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new(pd);
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pd^:=trealconstnode(p).value_real;
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hp:=tconstsym.create_ptr(orgname,constreal,pd,p.resultdef);
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end;
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setconstn :
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begin
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new(ps);
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ps^:=tsetconstnode(p).value_set^;
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hp:=tconstsym.create_ptr(orgname,constset,ps,p.resultdef);
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end;
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pointerconstn :
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begin
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hp:=tconstsym.create_ordptr(orgname,constpointer,tpointerconstnode(p).value,p.resultdef);
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end;
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niln :
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begin
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hp:=tconstsym.create_ord(orgname,constnil,0,p.resultdef);
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end;
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typen :
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begin
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if is_interface(p.resultdef) then
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begin
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if assigned(tobjectdef(p.resultdef).iidguid) then
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begin
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new(pg);
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pg^:=tobjectdef(p.resultdef).iidguid^;
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hp:=tconstsym.create_ptr(orgname,constguid,pg,p.resultdef);
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end
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else
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Message1(parser_e_interface_has_no_guid,tobjectdef(p.resultdef).objrealname^);
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end
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else
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Message(parser_e_illegal_expression);
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end;
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else
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Message(parser_e_illegal_expression);
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end;
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current_tokenpos:=storetokenpos;
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p.free;
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readconstant:=hp;
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end;
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procedure const_dec;
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var
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orgname : TIDString;
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hdef : tdef;
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sym : tsym;
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dummysymoptions : tsymoptions;
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deprecatedmsg : pshortstring;
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storetokenpos,filepos : tfileposinfo;
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old_block_type : tblock_type;
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skipequal : boolean;
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tclist : tasmlist;
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varspez : tvarspez;
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begin
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consume(_CONST);
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old_block_type:=block_type;
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block_type:=bt_const;
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repeat
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orgname:=orgpattern;
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filepos:=current_tokenpos;
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consume(_ID);
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case token of
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_EQUAL:
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begin
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consume(_EQUAL);
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sym:=readconstant(orgname,filepos);
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{ Support hint directives }
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dummysymoptions:=[];
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deprecatedmsg:=nil;
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try_consume_hintdirective(dummysymoptions,deprecatedmsg);
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if assigned(sym) then
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begin
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sym.symoptions:=sym.symoptions+dummysymoptions;
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sym.deprecatedmsg:=deprecatedmsg;
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symtablestack.top.insert(sym);
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end
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else
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stringdispose(deprecatedmsg);
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consume(_SEMICOLON);
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end;
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_COLON:
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begin
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{ set the blocktype first so a consume also supports a
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caret, to support const s : ^string = nil }
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block_type:=bt_const_type;
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consume(_COLON);
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read_anon_type(hdef,false);
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block_type:=bt_const;
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skipequal:=false;
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{ create symbol }
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storetokenpos:=current_tokenpos;
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current_tokenpos:=filepos;
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if not (cs_typed_const_writable in current_settings.localswitches) then
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varspez:=vs_const
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else
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varspez:=vs_value;
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sym:=tstaticvarsym.create(orgname,varspez,hdef,[]);
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current_tokenpos:=storetokenpos;
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symtablestack.top.insert(sym);
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{ procvar can have proc directives, but not type references }
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if (hdef.typ=procvardef) and
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(hdef.typesym=nil) then
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begin
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{ support p : procedure;stdcall=nil; }
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if try_to_consume(_SEMICOLON) then
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begin
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if check_proc_directive(true) then
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parse_var_proc_directives(sym)
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else
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begin
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Message(parser_e_proc_directive_expected);
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skipequal:=true;
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end;
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end
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else
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{ support p : procedure stdcall=nil; }
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begin
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if check_proc_directive(true) then
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parse_var_proc_directives(sym);
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end;
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{ add default calling convention }
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handle_calling_convention(tabstractprocdef(hdef));
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end;
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if not skipequal then
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begin
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{ get init value }
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consume(_EQUAL);
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if (cs_typed_const_writable in current_settings.localswitches) then
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tclist:=current_asmdata.asmlists[al_rotypedconsts]
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else
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tclist:=current_asmdata.asmlists[al_typedconsts];
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read_typed_const(tclist,tstaticvarsym(sym));
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end;
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end;
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else
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{ generate an error }
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consume(_EQUAL);
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end;
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until token<>_ID;
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block_type:=old_block_type;
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end;
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procedure label_dec;
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begin
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consume(_LABEL);
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if not(cs_support_goto in current_settings.moduleswitches) then
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Message(sym_e_goto_and_label_not_supported);
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repeat
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if not(token in [_ID,_INTCONST]) then
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consume(_ID)
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else
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begin
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if token=_ID then
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symtablestack.top.insert(tlabelsym.create(orgpattern))
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else
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symtablestack.top.insert(tlabelsym.create(pattern));
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consume(token);
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end;
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if token<>_SEMICOLON then consume(_COMMA);
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until not(token in [_ID,_INTCONST]);
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consume(_SEMICOLON);
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end;
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procedure types_dec;
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procedure get_cpp_class_external_status(od: tobjectdef);
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var
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hs: string;
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begin
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{ C++ classes can be external -> all methods inside are external
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(defined at the class level instead of per method, so that you cannot
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define some methods as external and some not)
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}
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if (token=_ID) and
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(idtoken=_EXTERNAL) then
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begin
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consume(_EXTERNAL);
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{ copied from pdecsub.pd_external }
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if not(token=_SEMICOLON) and not(idtoken=_NAME) then
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begin
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{ Always add library prefix and suffix to create an uniform name }
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hs:=get_stringconst;
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if ExtractFileExt(hs)='' then
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hs:=ChangeFileExt(hs,target_info.sharedlibext);
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if Copy(hs,1,length(target_info.sharedlibprefix))<>target_info.sharedlibprefix then
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hs:=target_info.sharedlibprefix+hs;
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od.import_lib:=stringdup(hs);
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end;
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include(od.objectoptions, oo_is_external);
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{ check if we shall use another name for the class }
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if (token=_ID) and
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(idtoken=_NAME) then
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begin
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consume(_NAME);
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od.objextname:=stringdup(get_stringconst);
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end
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else
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od.objextname:=stringdup(od.objrealname^);
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consume(_SEMICOLON);
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{ now all methods need to be external }
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od.make_all_methods_external;
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include(od.objectoptions,oo_is_external);
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end
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else
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od.objextname:=stringdup(od.objrealname^);
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{ ToDo: read the namespace of the class (influences the mangled name)}
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end;
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procedure get_objc_class_or_protocol_external_status(od: tobjectdef);
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begin
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{ Objective-C classes can be external -> all messages inside are
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external (defined at the class level instead of per method, so
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that you cannot define some methods as external and some not)
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}
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if (token=_ID) and
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(idtoken=_EXTERNAL) then
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begin
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consume(_EXTERNAL);
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if (token=_ID) and
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(idtoken=_NAME) then
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begin
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consume(_NAME);
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od.objextname:=stringdup(get_stringconst);
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end
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else
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od.objextname:=stringdup(od.objrealname^);
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consume(_SEMICOLON);
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od.make_all_methods_external;
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include(od.objectoptions,oo_is_external);
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end
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else { or also allow "public name 'x'"? }
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od.objextname:=stringdup(od.objrealname^);
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end;
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function parse_generic_parameters:TFPObjectList;
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var
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generictype : ttypesym;
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begin
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result:=TFPObjectList.Create(false);
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repeat
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if token=_ID then
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begin
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generictype:=ttypesym.create(orgpattern,cundefinedtype);
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include(generictype.symoptions,sp_generic_para);
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result.add(generictype);
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end;
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consume(_ID);
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until not try_to_consume(_COMMA) ;
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end;
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var
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typename,orgtypename : TIDString;
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newtype : ttypesym;
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sym : tsym;
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srsymtable : TSymtable;
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hdef : tdef;
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defpos,storetokenpos : tfileposinfo;
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old_block_type : tblock_type;
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objecttype : tobjecttyp;
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isgeneric,
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isunique,
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istyperenaming : boolean;
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generictypelist : TFPObjectList;
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generictokenbuf : tdynamicarray;
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vmtbuilder : TVMTBuilder;
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begin
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old_block_type:=block_type;
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block_type:=bt_type;
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repeat
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defpos:=current_tokenpos;
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istyperenaming:=false;
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generictypelist:=nil;
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generictokenbuf:=nil;
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{ generic declaration? }
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isgeneric:=try_to_consume(_GENERIC);
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typename:=pattern;
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orgtypename:=orgpattern;
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consume(_ID);
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{ Generic type declaration? }
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if isgeneric then
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begin
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consume(_LSHARPBRACKET);
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generictypelist:=parse_generic_parameters;
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consume(_RSHARPBRACKET);
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end;
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consume(_EQUAL);
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{ support 'ttype=type word' syntax }
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isunique:=try_to_consume(_TYPE);
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{ MacPas object model is more like Delphi's than like TP's, but }
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{ uses the object keyword instead of class }
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if (m_mac in current_settings.modeswitches) and
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(token = _OBJECT) then
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token := _CLASS;
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{ Start recording a generic template }
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if assigned(generictypelist) then
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begin
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generictokenbuf:=tdynamicarray.create(256);
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current_scanner.startrecordtokens(generictokenbuf);
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end;
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{ is the type already defined? }
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searchsym(typename,sym,srsymtable);
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newtype:=nil;
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{ found a symbol with this name? }
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if assigned(sym) then
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begin
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if (sym.typ=typesym) then
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begin
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if ((token=_CLASS) or
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(token=_INTERFACE) or
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(token=_DISPINTERFACE) or
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(token=_OBJCCLASS) or
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(token=_OBJCPROTOCOL) or
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(token=_OBJCCATEGORY)) and
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(assigned(ttypesym(sym).typedef)) and
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is_class_or_interface_or_dispinterface_or_objc(ttypesym(sym).typedef) and
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(oo_is_forward in tobjectdef(ttypesym(sym).typedef).objectoptions) then
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begin
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case token of
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_CLASS :
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objecttype:=odt_class;
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_INTERFACE :
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if current_settings.interfacetype=it_interfacecom then
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objecttype:=odt_interfacecom
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else
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objecttype:=odt_interfacecorba;
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_DISPINTERFACE :
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objecttype:=odt_dispinterface;
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_OBJCCLASS,
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_OBJCCATEGORY :
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objecttype:=odt_objcclass;
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_OBJCPROTOCOL :
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objecttype:=odt_objcprotocol;
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else
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internalerror(200811072);
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end;
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consume(token);
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{ we can ignore the result, the definition is modified }
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object_dec(objecttype,orgtypename,nil,nil,tobjectdef(ttypesym(sym).typedef));
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newtype:=ttypesym(sym);
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hdef:=newtype.typedef;
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end
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else
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message1(parser_h_type_redef,orgtypename);
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end;
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end;
|
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{ no old type reused ? Then insert this new type }
|
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if not assigned(newtype) then
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begin
|
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{ insert the new type first with an errordef, so that
|
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referencing the type before it's really set it
|
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will give an error (PFV) }
|
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hdef:=generrordef;
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storetokenpos:=current_tokenpos;
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newtype:=ttypesym.create(orgtypename,hdef);
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symtablestack.top.insert(newtype);
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current_tokenpos:=defpos;
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current_tokenpos:=storetokenpos;
|
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{ read the type definition }
|
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read_named_type(hdef,orgtypename,nil,generictypelist,false);
|
|
{ update the definition of the type }
|
|
if assigned(hdef) then
|
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begin
|
|
if assigned(hdef.typesym) then
|
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istyperenaming:=true;
|
|
if isunique then
|
|
begin
|
|
if is_objc_class_or_protocol(hdef) then
|
|
Message(parser_e_no_objc_unique);
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|
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hdef:=tstoreddef(hdef).getcopy;
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|
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{ fix name, it is used e.g. for tables }
|
|
if is_class_or_interface_or_dispinterface(hdef) then
|
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with tobjectdef(hdef) do
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begin
|
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stringdispose(objname);
|
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stringdispose(objrealname);
|
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objrealname:=stringdup(orgtypename);
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objname:=stringdup(upper(orgtypename));
|
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end;
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|
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include(hdef.defoptions,df_unique);
|
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end;
|
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if not assigned(hdef.typesym) then
|
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hdef.typesym:=newtype;
|
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end;
|
|
newtype.typedef:=hdef;
|
|
{ KAZ: handle TGUID declaration in system unit }
|
|
if (cs_compilesystem in current_settings.moduleswitches) and not assigned(rec_tguid) and
|
|
(typename='TGUID') and { name: TGUID and size=16 bytes that is 128 bits }
|
|
assigned(hdef) and (hdef.typ=recorddef) and (hdef.size=16) then
|
|
rec_tguid:=trecorddef(hdef);
|
|
end;
|
|
if assigned(hdef) then
|
|
begin
|
|
case hdef.typ of
|
|
pointerdef :
|
|
begin
|
|
try_consume_hintdirective(newtype.symoptions,newtype.deprecatedmsg);
|
|
consume(_SEMICOLON);
|
|
if try_to_consume(_FAR) then
|
|
begin
|
|
tpointerdef(hdef).is_far:=true;
|
|
consume(_SEMICOLON);
|
|
end;
|
|
end;
|
|
procvardef :
|
|
begin
|
|
{ in case of type renaming, don't parse proc directives }
|
|
if istyperenaming then
|
|
begin
|
|
try_consume_hintdirective(newtype.symoptions,newtype.deprecatedmsg);
|
|
consume(_SEMICOLON);
|
|
end
|
|
else
|
|
begin
|
|
if not check_proc_directive(true) then
|
|
begin
|
|
try_consume_hintdirective(newtype.symoptions,newtype.deprecatedmsg);
|
|
consume(_SEMICOLON);
|
|
end;
|
|
parse_var_proc_directives(tsym(newtype));
|
|
handle_calling_convention(tprocvardef(hdef));
|
|
if try_consume_hintdirective(newtype.symoptions,newtype.deprecatedmsg) then
|
|
consume(_SEMICOLON);
|
|
end;
|
|
end;
|
|
objectdef :
|
|
begin
|
|
try_consume_hintdirective(newtype.symoptions,newtype.deprecatedmsg);
|
|
consume(_SEMICOLON);
|
|
|
|
{ we have to know whether the class or protocol is
|
|
external before the vmt is built, because some errors/
|
|
hints depend on this }
|
|
if is_objc_class_or_protocol(hdef) then
|
|
get_objc_class_or_protocol_external_status(tobjectdef(hdef));
|
|
|
|
if is_cppclass(hdef) then
|
|
get_cpp_class_external_status(tobjectdef(hdef));
|
|
|
|
{ Build VMT indexes, skip for type renaming and forward classes }
|
|
if (hdef.typesym=newtype) and
|
|
not(oo_is_forward in tobjectdef(hdef).objectoptions) and
|
|
not(df_generic in hdef.defoptions) then
|
|
begin
|
|
vmtbuilder:=TVMTBuilder.Create(tobjectdef(hdef));
|
|
vmtbuilder.generate_vmt;
|
|
vmtbuilder.free;
|
|
end;
|
|
|
|
{ In case of an objcclass, verify that all methods have a message
|
|
name set. We only check this now, because message names can be set
|
|
during the protocol (interface) mapping. At the same time, set the
|
|
mangled names (these depend on the "external" name of the class),
|
|
and mark private fields of external classes as "used" (to avoid
|
|
bogus notes about them being unused)
|
|
}
|
|
if is_objc_class_or_protocol(hdef) then
|
|
tobjectdef(hdef).finish_objc_data;
|
|
|
|
if is_cppclass(hdef) then
|
|
tobjectdef(hdef).finish_cpp_data;
|
|
end;
|
|
recorddef :
|
|
begin
|
|
try_consume_hintdirective(newtype.symoptions,newtype.deprecatedmsg);
|
|
consume(_SEMICOLON);
|
|
end;
|
|
else
|
|
begin
|
|
try_consume_hintdirective(newtype.symoptions,newtype.deprecatedmsg);
|
|
consume(_SEMICOLON);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
if isgeneric and not(hdef.typ in [objectdef,recorddef]) then
|
|
message(parser_e_cant_create_generics_of_this_type);
|
|
|
|
{ Stop recording a generic template }
|
|
if assigned(generictypelist) then
|
|
begin
|
|
current_scanner.stoprecordtokens;
|
|
tstoreddef(hdef).generictokenbuf:=generictokenbuf;
|
|
{ Generic is never a type renaming }
|
|
hdef.typesym:=newtype;
|
|
end;
|
|
if assigned(generictypelist) then
|
|
generictypelist.free;
|
|
until token<>_ID;
|
|
resolve_forward_types;
|
|
block_type:=old_block_type;
|
|
end;
|
|
|
|
|
|
{ reads a type declaration to the symbol table }
|
|
procedure type_dec;
|
|
begin
|
|
consume(_TYPE);
|
|
types_dec;
|
|
end;
|
|
|
|
|
|
procedure var_dec;
|
|
{ parses variable declarations and inserts them in }
|
|
{ the top symbol table of symtablestack }
|
|
begin
|
|
consume(_VAR);
|
|
read_var_decls([]);
|
|
end;
|
|
|
|
|
|
procedure property_dec;
|
|
var
|
|
old_block_type : tblock_type;
|
|
begin
|
|
consume(_PROPERTY);
|
|
if not(symtablestack.top.symtabletype in [staticsymtable,globalsymtable]) then
|
|
message(parser_e_resourcestring_only_sg);
|
|
old_block_type:=block_type;
|
|
block_type:=bt_const;
|
|
repeat
|
|
read_property_dec(nil);
|
|
consume(_SEMICOLON);
|
|
until token<>_ID;
|
|
block_type:=old_block_type;
|
|
end;
|
|
|
|
|
|
procedure threadvar_dec;
|
|
{ parses thread variable declarations and inserts them in }
|
|
{ the top symbol table of symtablestack }
|
|
begin
|
|
consume(_THREADVAR);
|
|
if not(symtablestack.top.symtabletype in [staticsymtable,globalsymtable]) then
|
|
message(parser_e_threadvars_only_sg);
|
|
read_var_decls([vd_threadvar]);
|
|
end;
|
|
|
|
|
|
procedure resourcestring_dec;
|
|
var
|
|
orgname : TIDString;
|
|
p : tnode;
|
|
dummysymoptions : tsymoptions;
|
|
deprecatedmsg : pshortstring;
|
|
storetokenpos,filepos : tfileposinfo;
|
|
old_block_type : tblock_type;
|
|
sp : pchar;
|
|
sym : tsym;
|
|
begin
|
|
consume(_RESOURCESTRING);
|
|
if not(symtablestack.top.symtabletype in [staticsymtable,globalsymtable]) then
|
|
message(parser_e_resourcestring_only_sg);
|
|
old_block_type:=block_type;
|
|
block_type:=bt_const;
|
|
repeat
|
|
orgname:=orgpattern;
|
|
filepos:=current_tokenpos;
|
|
consume(_ID);
|
|
case token of
|
|
_EQUAL:
|
|
begin
|
|
consume(_EQUAL);
|
|
p:=comp_expr(true);
|
|
storetokenpos:=current_tokenpos;
|
|
current_tokenpos:=filepos;
|
|
sym:=nil;
|
|
case p.nodetype of
|
|
ordconstn:
|
|
begin
|
|
if is_constcharnode(p) then
|
|
begin
|
|
getmem(sp,2);
|
|
sp[0]:=chr(tordconstnode(p).value.svalue);
|
|
sp[1]:=#0;
|
|
sym:=tconstsym.create_string(orgname,constresourcestring,sp,1);
|
|
end
|
|
else
|
|
Message(parser_e_illegal_expression);
|
|
end;
|
|
stringconstn:
|
|
with Tstringconstnode(p) do
|
|
begin
|
|
getmem(sp,len+1);
|
|
move(value_str^,sp^,len+1);
|
|
sym:=tconstsym.create_string(orgname,constresourcestring,sp,len);
|
|
end;
|
|
else
|
|
Message(parser_e_illegal_expression);
|
|
end;
|
|
current_tokenpos:=storetokenpos;
|
|
{ Support hint directives }
|
|
dummysymoptions:=[];
|
|
deprecatedmsg:=nil;
|
|
try_consume_hintdirective(dummysymoptions,deprecatedmsg);
|
|
if assigned(sym) then
|
|
begin
|
|
sym.symoptions:=sym.symoptions+dummysymoptions;
|
|
sym.deprecatedmsg:=deprecatedmsg;
|
|
symtablestack.top.insert(sym);
|
|
end
|
|
else
|
|
stringdispose(deprecatedmsg);
|
|
consume(_SEMICOLON);
|
|
p.free;
|
|
end;
|
|
else consume(_EQUAL);
|
|
end;
|
|
until token<>_ID;
|
|
block_type:=old_block_type;
|
|
end;
|
|
|
|
end.
|