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759 lines
27 KiB
ObjectPascal
759 lines
27 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2001 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 defines.inc}
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interface
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uses
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{ global }
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globals,
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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 var_dec;
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procedure threadvar_dec;
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procedure resourcestring_dec;
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implementation
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uses
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{ common }
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cutils,cclasses,
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{ global }
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globtype,tokens,verbose,
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systems,
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{ aasm }
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aasm,fmodule,
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{ symtable }
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symconst,symbase,symtype,symdef,symtable,
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{ pass 1 }
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nmat,nadd,ncal,nset,ncnv,ninl,ncon,nld,nflw,nobj,
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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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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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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:=akttokenpos;
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akttokenpos:=filepos;
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case p.nodetype of
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ordconstn:
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begin
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if is_constintnode(p) then
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hp:=tconstsym.create_ord_typed(orgname,constint,tordconstnode(p).value,tordconstnode(p).resulttype)
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else if is_constcharnode(p) then
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hp:=tconstsym.create_ord(orgname,constchar,tordconstnode(p).value)
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else if is_constboolnode(p) then
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hp:=tconstsym.create_ord(orgname,constbool,tordconstnode(p).value)
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else if is_constwidecharnode(p) then
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hp:=tconstsym.create_ord(orgname,constwchar,tordconstnode(p).value)
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else if p.resulttype.def.deftype=enumdef then
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hp:=tconstsym.create_ord_typed(orgname,constord,tordconstnode(p).value,p.resulttype)
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else if p.resulttype.def.deftype=pointerdef then
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hp:=tconstsym.create_ordptr_typed(orgname,constpointer,tordconstnode(p).value,p.resulttype)
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else internalerror(111);
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end;
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stringconstn:
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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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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);
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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_typed(orgname,constset,ps,p.resulttype);
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end;
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pointerconstn :
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begin
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hp:=tconstsym.create_ordptr_typed(orgname,constpointer,tpointerconstnode(p).value,p.resulttype);
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end;
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niln :
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begin
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hp:=tconstsym.create_ord_typed(orgname,constnil,0,p.resulttype);
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end;
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typen :
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begin
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if is_interface(p.resulttype.def) then
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begin
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if tobjectdef(p.resulttype.def).isiidguidvalid then
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begin
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new(pg);
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pg^:=tobjectdef(p.resulttype.def).iidguid;
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hp:=tconstsym.create_ptr(orgname,constguid,pg);
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end
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else
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Message1(parser_e_interface_has_no_guid,tobjectdef(p.resulttype.def).objname^);
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end
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else
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Message(cg_e_illegal_expression);
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end;
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else
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Message(cg_e_illegal_expression);
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end;
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akttokenpos:=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 : stringid;
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tt : ttype;
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sym : tsym;
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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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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:=akttokenpos;
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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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if assigned(sym) then
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symtablestack.insert(sym);
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try_consume_hintdirective(sym.symoptions);
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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_type;
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consume(_COLON);
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ignore_equal:=true;
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read_type(tt,'');
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ignore_equal:=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:=akttokenpos;
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akttokenpos:=filepos;
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sym:=ttypedconstsym.createtype(orgname,tt,(cs_typed_const_writable in aktlocalswitches));
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akttokenpos:=storetokenpos;
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symtablestack.insert(sym);
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{ procvar can have proc directives }
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if (tt.def.deftype=procvardef) then
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begin
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{ support p : procedure;stdcall=nil; }
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if (token=_SEMICOLON) then
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begin
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consume(_SEMICOLON);
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if is_proc_directive(token) 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 is_proc_directive(token) 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(nil,tabstractprocdef(tt.def));
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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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readtypedconst(tt,ttypedconstsym(sym),(cs_typed_const_writable in aktlocalswitches));
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try_consume_hintdirective(sym.symoptions);
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consume(_SEMICOLON);
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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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var
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hl : tasmlabel;
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begin
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consume(_LABEL);
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if not(cs_support_goto in aktmoduleswitches) 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 (cs_create_smart in aktmoduleswitches) then
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begin
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getdatalabel(hl);
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{ we still want a warning if unused }
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hl.refs:=0;
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end
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else
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getlabel(hl);
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if token=_ID then
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symtablestack.insert(tlabelsym.create(orgpattern,hl))
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else
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symtablestack.insert(tlabelsym.create(pattern,hl));
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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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{ search in symtablestack used, but not defined type }
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procedure resolve_type_forward(p : tnamedindexitem);
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var
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hpd,pd : tdef;
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stpos : tfileposinfo;
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again : boolean;
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srsym : tsym;
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srsymtable : tsymtable;
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begin
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{ Check only typesyms or record/object fields }
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case tsym(p).typ of
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typesym :
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pd:=ttypesym(p).restype.def;
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varsym :
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if (tsym(p).owner.symtabletype in [objectsymtable,recordsymtable]) then
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pd:=tvarsym(p).vartype.def
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else
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exit;
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else
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exit;
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end;
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repeat
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again:=false;
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case pd.deftype of
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arraydef :
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begin
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{ elementtype could also be defined using a forwarddef }
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pd:=tarraydef(pd).elementtype.def;
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again:=true;
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end;
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pointerdef,
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classrefdef :
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begin
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{ classrefdef inherits from pointerdef }
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hpd:=tpointerdef(pd).pointertype.def;
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{ still a forward def ? }
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if hpd.deftype=forwarddef then
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begin
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{ try to resolve the forward }
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{ get the correct position for it }
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stpos:=akttokenpos;
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akttokenpos:=tforwarddef(hpd).forwardpos;
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resolving_forward:=true;
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make_ref:=false;
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searchsym(tforwarddef(hpd).tosymname,srsym,srsymtable);
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make_ref:=true;
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resolving_forward:=false;
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akttokenpos:=stpos;
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{ we don't need the forwarddef anymore, dispose it }
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hpd.free;
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tpointerdef(pd).pointertype.def:=nil; { if error occurs }
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{ was a type sym found ? }
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if assigned(srsym) and
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(srsym.typ=typesym) then
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begin
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tpointerdef(pd).pointertype.setsym(srsym);
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{ avoid wrong unused warnings web bug 801 PM }
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inc(tstoredsym(srsym).refs);
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{$ifdef GDB}
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if (cs_debuginfo in aktmoduleswitches) and assigned(debuglist) and
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(tsym(p).owner.symtabletype in [globalsymtable,staticsymtable]) then
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begin
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ttypesym(p).isusedinstab := true;
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ttypesym(p).concatstabto(debuglist);
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end;
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{$endif GDB}
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{ we need a class type for classrefdef }
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if (pd.deftype=classrefdef) and
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not(is_class(ttypesym(srsym).restype.def)) then
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Message1(type_e_class_type_expected,ttypesym(srsym).restype.def.typename);
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end
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else
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begin
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MessagePos1(tsym(p).fileinfo,sym_e_forward_type_not_resolved,tsym(p).realname);
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{ try to recover }
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tpointerdef(pd).pointertype:=generrortype;
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end;
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end;
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end;
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recorddef :
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trecorddef(pd).symtable.foreach_static({$ifdef FPCPROCVAR}@{$endif}resolve_type_forward);
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objectdef :
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begin
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if not(m_fpc in aktmodeswitches) and
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(oo_is_forward in tobjectdef(pd).objectoptions) then
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begin
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{ only give an error as the implementation may follow in an
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other type block which is allowed by FPC modes }
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MessagePos1(tsym(p).fileinfo,sym_e_forward_type_not_resolved,tsym(p).realname);
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end
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else
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begin
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{ Check all fields of the object declaration, but don't
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check objectdefs in objects/records, because these
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can't exist (anonymous objects aren't allowed) }
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if not(tsym(p).owner.symtabletype in [objectsymtable,recordsymtable]) then
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tobjectdef(pd).symtable.foreach_static({$ifdef FPCPROCVAR}@{$endif}resolve_type_forward);
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end;
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end;
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end;
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until not again;
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end;
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{ reads a type declaration to the symbol table }
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procedure type_dec;
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var
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typename,orgtypename : stringid;
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newtype : ttypesym;
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sym : tsym;
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srsymtable : tsymtable;
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tt : ttype;
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oldfilepos,
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defpos,storetokenpos : tfileposinfo;
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old_block_type : tblock_type;
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ch : tclassheader;
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istyperenaming : boolean;
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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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consume(_TYPE);
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typecanbeforward:=true;
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repeat
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typename:=pattern;
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orgtypename:=orgpattern;
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defpos:=akttokenpos;
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istyperenaming:=false;
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consume(_ID);
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consume(_EQUAL);
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{ support 'ttype=type word' syntax }
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if token=_TYPE then
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Consume(_TYPE);
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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)) and
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(assigned(ttypesym(sym).restype.def)) and
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is_class_or_interface(ttypesym(sym).restype.def) and
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(oo_is_forward in tobjectdef(ttypesym(sym).restype.def).objectoptions) then
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begin
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{ we can ignore the result }
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{ the definition is modified }
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object_dec(orgtypename,tobjectdef(ttypesym(sym).restype.def));
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newtype:=ttypesym(sym);
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tt:=newtype.restype;
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end;
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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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tt:=generrortype;
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storetokenpos:=akttokenpos;
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newtype:=ttypesym.create(orgtypename,tt);
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symtablestack.insert(newtype);
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akttokenpos:=defpos;
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akttokenpos:=storetokenpos;
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{ read the type definition }
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read_type(tt,orgtypename);
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{ update the definition of the type }
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newtype.restype:=tt;
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if assigned(tt.sym) then
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istyperenaming:=true
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else
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tt.sym:=newtype;
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if assigned(tt.def) and not assigned(tt.def.typesym) then
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tt.def.typesym:=newtype;
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{ KAZ: handle TGUID declaration in system unit }
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if (cs_compilesystem in aktmoduleswitches) and not assigned(rec_tguid) and
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(typename='TGUID') and { name: TGUID and size=16 bytes that is 128 bits }
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assigned(tt.def) and (tt.def.deftype=recorddef) and (tt.def.size=16) then
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rec_tguid:=trecorddef(tt.def);
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end;
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if assigned(tt.def) then
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begin
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case tt.def.deftype of
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pointerdef :
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begin
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consume(_SEMICOLON);
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if try_to_consume(_FAR) then
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begin
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tpointerdef(tt.def).is_far:=true;
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consume(_SEMICOLON);
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end;
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end;
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procvardef :
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begin
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{ in case of type renaming, don't parse proc directives }
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if istyperenaming then
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consume(_SEMICOLON)
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else
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begin
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if not is_proc_directive(token) then
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consume(_SEMICOLON);
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parse_var_proc_directives(tsym(newtype));
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end;
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end;
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objectdef,
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recorddef :
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begin
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try_consume_hintdirective(newtype.symoptions);
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consume(_SEMICOLON);
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end;
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else
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consume(_SEMICOLON);
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end;
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end;
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{ Write tables if we are the typesym that defines
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this type. This will not be done for simple type renamings }
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if (tt.def.typesym=newtype) then
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begin
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{ file position }
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oldfilepos:=aktfilepos;
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aktfilepos:=newtype.fileinfo;
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{ generate persistent init/final tables when it's declared in the interface so it can
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be reused in other used }
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if (not current_module.in_implementation) and
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(tt.def.needs_inittable or
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is_class(tt.def)) then
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generate_inittable(newtype);
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{ for objects we should write the vmt and interfaces.
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This need to be done after the rtti has been written, because
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it can contain a reference to that data (PFV)
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This is not for forward classes }
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if (tt.def.deftype=objectdef) and
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not(oo_is_forward in tobjectdef(tt.def).objectoptions) then
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begin
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ch:=cclassheader.create(tobjectdef(tt.def));
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{ generate and check virtual methods, must be done
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before RTTI is written }
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ch.genvmt;
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{ generate rtti info if published items are available }
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if (oo_can_have_published in tobjectdef(tt.def).objectoptions) then
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generate_rtti(newtype);
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if is_interface(tobjectdef(tt.def)) then
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ch.writeinterfaceids;
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if (oo_has_vmt in tobjectdef(tt.def).objectoptions) then
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ch.writevmt;
|
|
ch.free;
|
|
end;
|
|
|
|
aktfilepos:=oldfilepos;
|
|
end;
|
|
until token<>_ID;
|
|
typecanbeforward:=false;
|
|
symtablestack.foreach_static({$ifdef FPCPROCVAR}@{$endif}resolve_type_forward);
|
|
block_type:=old_block_type;
|
|
end;
|
|
|
|
|
|
procedure var_dec;
|
|
{ parses variable declarations and inserts them in }
|
|
{ the top symbol table of symtablestack }
|
|
begin
|
|
consume(_VAR);
|
|
read_var_decs(false,false,false);
|
|
end;
|
|
|
|
|
|
procedure threadvar_dec;
|
|
{ parses thread variable declarations and inserts them in }
|
|
{ the top symbol table of symtablestack }
|
|
begin
|
|
consume(_THREADVAR);
|
|
if not(symtablestack.symtabletype in [staticsymtable,globalsymtable]) then
|
|
message(parser_e_threadvars_only_sg);
|
|
read_var_decs(false,false,true);
|
|
end;
|
|
|
|
|
|
procedure resourcestring_dec;
|
|
var
|
|
orgname : stringid;
|
|
p : tnode;
|
|
storetokenpos,filepos : tfileposinfo;
|
|
old_block_type : tblock_type;
|
|
sp : pchar;
|
|
begin
|
|
consume(_RESOURCESTRING);
|
|
if not(symtablestack.symtabletype in [staticsymtable,globalsymtable]) then
|
|
message(parser_e_resourcestring_only_sg);
|
|
old_block_type:=block_type;
|
|
block_type:=bt_const;
|
|
repeat
|
|
orgname:=orgpattern;
|
|
filepos:=akttokenpos;
|
|
consume(_ID);
|
|
case token of
|
|
_EQUAL:
|
|
begin
|
|
consume(_EQUAL);
|
|
p:=comp_expr(true);
|
|
storetokenpos:=akttokenpos;
|
|
akttokenpos:=filepos;
|
|
case p.nodetype of
|
|
ordconstn:
|
|
begin
|
|
if is_constcharnode(p) then
|
|
begin
|
|
getmem(sp,2);
|
|
sp[0]:=chr(tordconstnode(p).value);
|
|
sp[1]:=#0;
|
|
symtablestack.insert(tconstsym.create_string(orgname,constresourcestring,sp,1));
|
|
end
|
|
else
|
|
Message(cg_e_illegal_expression);
|
|
end;
|
|
stringconstn:
|
|
begin
|
|
getmem(sp,tstringconstnode(p).len+1);
|
|
move(tstringconstnode(p).value_str^,sp^,tstringconstnode(p).len+1);
|
|
symtablestack.insert(tconstsym.create_string(orgname,constresourcestring,sp,tstringconstnode(p).len));
|
|
end;
|
|
else
|
|
Message(cg_e_illegal_expression);
|
|
end;
|
|
akttokenpos:=storetokenpos;
|
|
consume(_SEMICOLON);
|
|
p.free;
|
|
end;
|
|
else consume(_EQUAL);
|
|
end;
|
|
until token<>_ID;
|
|
block_type:=old_block_type;
|
|
end;
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.41 2002-03-04 17:54:59 peter
|
|
* allow oridinal labels again
|
|
|
|
Revision 1.40 2001/12/06 17:57:35 florian
|
|
+ parasym to tparaitem added
|
|
|
|
Revision 1.39 2001/10/25 21:22:35 peter
|
|
* calling convention rewrite
|
|
|
|
Revision 1.38 2001/10/24 10:26:53 marco
|
|
* Don't parse proc directives after type renaming of procvars
|
|
|
|
Revision 1.37 2001/10/20 20:30:21 peter
|
|
* read only typed const support, switch $J-
|
|
|
|
Revision 1.36 2001/10/20 19:28:39 peter
|
|
* interface 2 guid support
|
|
* guid constants support
|
|
|
|
Revision 1.35 2001/10/20 17:20:13 peter
|
|
* fixed generation of rtti for virtualmethods
|
|
|
|
Revision 1.34 2001/09/19 11:06:03 michael
|
|
* realname updated for some hints
|
|
* realname used for consts,labels
|
|
|
|
Revision 1.33 2001/09/02 21:18:28 peter
|
|
* split constsym.value in valueord,valueordptr,valueptr. The valueordptr
|
|
is used for holding target platform pointer values. As those can be
|
|
bigger than the source platform.
|
|
|
|
Revision 1.32 2001/08/30 20:13:53 peter
|
|
* rtti/init table updates
|
|
* rttisym for reusable global rtti/init info
|
|
* support published for interfaces
|
|
|
|
Revision 1.31 2001/06/03 21:57:35 peter
|
|
+ hint directive parsing support
|
|
|
|
Revision 1.30 2001/05/08 21:06:31 florian
|
|
* some more support for widechars commited especially
|
|
regarding type casting and constants
|
|
|
|
Revision 1.29 2001/04/13 01:22:11 peter
|
|
* symtable change to classes
|
|
* range check generation and errors fixed, make cycle DEBUG=1 works
|
|
* memory leaks fixed
|
|
|
|
Revision 1.28 2001/04/04 22:43:50 peter
|
|
* remove unnecessary calls to firstpass
|
|
|
|
Revision 1.27 2001/04/04 21:30:43 florian
|
|
* applied several fixes to get the DD8 Delphi Unit compiled
|
|
e.g. "forward"-interfaces are working now
|
|
|
|
Revision 1.26 2001/04/02 21:20:31 peter
|
|
* resulttype rewrite
|
|
|
|
Revision 1.25 2001/03/11 22:58:49 peter
|
|
* getsym redesign, removed the globals srsym,srsymtable
|
|
|
|
Revision 1.24 2000/12/25 00:07:27 peter
|
|
+ new tlinkedlist class (merge of old tstringqueue,tcontainer and
|
|
tlinkedlist objects)
|
|
|
|
Revision 1.23 2000/12/07 17:19:42 jonas
|
|
* new constant handling: from now on, hex constants >$7fffffff are
|
|
parsed as unsigned constants (otherwise, $80000000 got sign extended
|
|
and became $ffffffff80000000), all constants in the longint range
|
|
become longints, all constants >$7fffffff and <=cardinal($ffffffff)
|
|
are cardinals and the rest are int64's.
|
|
* added lots of longint typecast to prevent range check errors in the
|
|
compiler and rtl
|
|
* type casts of symbolic ordinal constants are now preserved
|
|
* fixed bug where the original resulttype.def wasn't restored correctly
|
|
after doing a 64bit rangecheck
|
|
|
|
Revision 1.22 2000/11/29 00:30:35 florian
|
|
* unused units removed from uses clause
|
|
* some changes for widestrings
|
|
|
|
Revision 1.21 2000/11/12 22:17:46 peter
|
|
* some realname updates for messages
|
|
|
|
Revision 1.20 2000/11/11 16:19:11 peter
|
|
* allow far directive for pointer type declarations
|
|
|
|
Revision 1.19 2000/11/04 14:25:20 florian
|
|
+ merged Attila's changes for interfaces, not tested yet
|
|
|
|
Revision 1.18 2000/10/31 22:02:49 peter
|
|
* symtable splitted, no real code changes
|
|
|
|
Revision 1.17 2000/10/14 10:14:51 peter
|
|
* moehrendorf oct 2000 rewrite
|
|
|
|
Revision 1.16 2000/09/24 21:19:50 peter
|
|
* delphi compile fixes
|
|
|
|
Revision 1.15 2000/09/24 15:06:21 peter
|
|
* use defines.inc
|
|
|
|
Revision 1.14 2000/09/11 17:00:23 florian
|
|
+ first implementation of Netware Module support, thanks to
|
|
Armin Diehl (diehl@nordrhein.de) for providing the patches
|
|
|
|
Revision 1.13 2000/08/27 20:19:39 peter
|
|
* store strings with case in ppu, when an internal symbol is created
|
|
a '$' is prefixed so it's not automatic uppercased
|
|
|
|
Revision 1.12 2000/08/27 16:11:51 peter
|
|
* moved some util functions from globals,cobjects to cutils
|
|
* splitted files into finput,fmodule
|
|
|
|
Revision 1.11 2000/08/20 15:01:17 peter
|
|
* don't allow forward class in separate type blocks for delphi (merged)
|
|
|
|
Revision 1.10 2000/08/17 09:17:19 pierre
|
|
* fix go32v2 cycle problem
|
|
|
|
Revision 1.9 2000/08/16 18:33:53 peter
|
|
* splitted namedobjectitem.next into indexnext and listnext so it
|
|
can be used in both lists
|
|
* don't allow "word = word" type definitions (merged)
|
|
|
|
Revision 1.8 2000/08/13 13:11:28 peter
|
|
* put defaultpara values in parast and changed the name to
|
|
'def<Parameter name>'
|
|
|
|
Revision 1.7 2000/08/13 08:42:59 peter
|
|
* support absolute refering to funcret (merged)
|
|
|
|
Revision 1.6 2000/08/02 19:49:59 peter
|
|
* first things for default parameters
|
|
|
|
Revision 1.5 2000/07/30 17:04:43 peter
|
|
* merged fixes
|
|
|
|
Revision 1.4 2000/07/14 05:11:49 michael
|
|
+ Patch to 1.1
|
|
|
|
Revision 1.3 2000/07/13 12:08:26 michael
|
|
+ patched to 1.1.0 with former 1.09patch from peter
|
|
|
|
Revision 1.2 2000/07/13 11:32:44 michael
|
|
+ removed logs
|
|
|
|
}
|