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1974 lines
79 KiB
ObjectPascal
1974 lines
79 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Florian Klaempfl
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Parses variable declarations. Used for var statement and record
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definitions
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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 pdecvar;
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{$i fpcdefs.inc}
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interface
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uses
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cclasses,
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symtable,symsym,symdef;
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type
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tvar_dec_option=(vd_record,vd_object,vd_threadvar,vd_class,vd_final,vd_canreorder,vd_check_generic);
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tvar_dec_options=set of tvar_dec_option;
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function read_property_dec(is_classproperty:boolean;astruct:tabstractrecorddef):tpropertysym;
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procedure read_var_decls(options:Tvar_dec_options;out had_generic:boolean);
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procedure read_record_fields(options:Tvar_dec_options; reorderlist: TFPObjectList; variantdesc: ppvariantrecdesc;out had_generic:boolean);
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procedure read_public_and_external(vs: tabstractvarsym);
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procedure try_consume_sectiondirective(var asection: ansistring);
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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,
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{ global }
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globtype,globals,tokens,verbose,constexp,
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systems,
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{ symtable }
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symconst,symbase,symtype,defutil,defcmp,symcreat,
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{$if defined(i386) or defined(i8086)}
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symcpu,
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{$endif}
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fmodule,htypechk,
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{ pass 1 }
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node,pass_1,aasmbase,aasmdata,
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ncon,nset,ncnv,nld,nutils,
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{ codegen }
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ngenutil,
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{ parser }
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scanner,
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pbase,pexpr,ptype,ptconst,pdecsub;
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function read_property_dec(is_classproperty:boolean;astruct:tabstractrecorddef):tpropertysym;
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{ convert a node tree to symlist and return the last
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symbol }
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function parse_symlist(pl:tpropaccesslist;out def:tdef):boolean;
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var
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idx : longint;
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sym : tsym;
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srsymtable : TSymtable;
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st : TSymtable;
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p : tnode;
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begin
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result:=true;
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def:=nil;
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if token=_ID then
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begin
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if assigned(astruct) then
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sym:=search_struct_member(astruct,pattern)
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else
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searchsym(pattern,sym,srsymtable);
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if assigned(sym) then
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begin
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if assigned(astruct) and
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not is_visible_for_object(sym,astruct) then
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Message(parser_e_cant_access_private_member);
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case sym.typ of
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fieldvarsym :
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begin
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addsymref(sym);
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pl.addsym(sl_load,sym);
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def:=tfieldvarsym(sym).vardef;
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end;
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procsym :
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begin
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addsymref(sym);
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pl.addsym(sl_call,sym);
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end;
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else
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begin
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Message1(parser_e_illegal_field_or_method,orgpattern);
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def:=generrordef;
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result:=false;
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end;
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end;
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end
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else
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begin
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Message1(parser_e_illegal_field_or_method,orgpattern);
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def:=generrordef;
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result:=false;
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end;
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consume(_ID);
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repeat
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case token of
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_ID,
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_SEMICOLON :
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begin
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break;
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end;
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_POINT :
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begin
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consume(_POINT);
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if assigned(def) then
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begin
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st:=def.GetSymtable(gs_record);
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if assigned(st) then
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begin
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sym:=tsym(st.Find(pattern));
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if not(assigned(sym)) and is_object(def) then
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sym:=search_struct_member(tobjectdef(def),pattern);
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if assigned(sym) then
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begin
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pl.addsym(sl_subscript,sym);
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case sym.typ of
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fieldvarsym :
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def:=tfieldvarsym(sym).vardef;
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else
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begin
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Message1(sym_e_illegal_field,orgpattern);
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result:=false;
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end;
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end;
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end
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else
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begin
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Message1(sym_e_illegal_field,orgpattern);
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result:=false;
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end;
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end
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else
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begin
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Message(parser_e_invalid_qualifier);
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result:=false;
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end;
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end
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else
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begin
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Message(parser_e_invalid_qualifier);
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result:=false;
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end;
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consume(_ID);
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end;
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_LECKKLAMMER :
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begin
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consume(_LECKKLAMMER);
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repeat
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if def.typ=arraydef then
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begin
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idx:=0;
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p:=comp_expr([ef_accept_equal]);
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if (not codegenerror) then
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begin
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if (p.nodetype=ordconstn) then
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begin
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{ type/range checking }
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inserttypeconv(p,tarraydef(def).rangedef);
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if (Tordconstnode(p).value<int64(low(longint))) or
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(Tordconstnode(p).value>int64(high(longint))) then
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message(parser_e_array_range_out_of_bounds)
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else
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idx:=Tordconstnode(p).value.svalue
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end
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else
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Message(type_e_ordinal_expr_expected)
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end;
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pl.addconst(sl_vec,idx,p.resultdef);
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p.free;
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def:=tarraydef(def).elementdef;
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end
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else
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begin
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Message(parser_e_invalid_qualifier);
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result:=false;
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end;
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until not try_to_consume(_COMMA);
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consume(_RECKKLAMMER);
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end;
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else
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begin
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Message(parser_e_ill_property_access_sym);
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result:=false;
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break;
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end;
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end;
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until false;
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end
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else
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begin
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Message(parser_e_ill_property_access_sym);
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result:=false;
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end;
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end;
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function has_implicit_default(p : tpropertysym) : boolean;
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begin
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has_implicit_default:=
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(is_string(p.propdef) or
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is_real(p.propdef) or
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is_pointer(p.propdef));
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end;
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function allow_default_property(p : tpropertysym) : boolean;
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begin
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allow_default_property:=
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(is_ordinal(p.propdef) or
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{$ifndef cpu64bitaddr}
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is_64bitint(p.propdef) or
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{$endif cpu64bitaddr}
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is_class(p.propdef) or
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is_single(p.propdef) or
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(p.propdef.typ in [classrefdef,pointerdef]) or
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is_smallset(p.propdef)
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) and not
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(
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(p.propdef.typ=arraydef) and
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(ppo_indexed in p.propoptions)
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) and not
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(ppo_hasparameters in p.propoptions);
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end;
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procedure create_accessor_procsym(p: tpropertysym; pd: tprocdef; const prefix: string;
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accesstype: tpropaccesslisttypes);
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var
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sym: tprocsym;
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begin
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handle_calling_convention(pd);
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sym:=cprocsym.create(prefix+lower(p.realname));
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symtablestack.top.insert(sym);
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pd.procsym:=sym;
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include(pd.procoptions,po_dispid);
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include(pd.procoptions,po_global);
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pd.visibility:=vis_private;
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proc_add_definition(pd);
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p.propaccesslist[accesstype].addsym(sl_call,sym);
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p.propaccesslist[accesstype].procdef:=pd;
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end;
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procedure parse_dispinterface(p : tpropertysym; readpd,writepd: tprocdef;
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var paranr: word);
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var
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hasread, haswrite: boolean;
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pt: tnode;
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hdispid: longint;
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hparavs: tparavarsym;
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begin
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p.propaccesslist[palt_read].clear;
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p.propaccesslist[palt_write].clear;
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hasread:=true;
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haswrite:=true;
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hdispid:=0;
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if try_to_consume(_READONLY) then
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haswrite:=false
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else if try_to_consume(_WRITEONLY) then
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hasread:=false;
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if try_to_consume(_DISPID) then
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begin
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pt:=comp_expr([ef_accept_equal]);
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if is_constintnode(pt) then
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if (Tordconstnode(pt).value<int64(low(longint))) or (Tordconstnode(pt).value>int64(high(longint))) then
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message3(type_e_range_check_error_bounds,tostr(Tordconstnode(pt).value),tostr(low(longint)),tostr(high(longint)))
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else
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hdispid:=Tordconstnode(pt).value.svalue
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else
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Message(parser_e_dispid_must_be_ord_const);
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pt.free;
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end
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else
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hdispid:=tobjectdef(astruct).get_next_dispid;
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{ COM property is simply a pair of methods, tagged with 'propertyget'
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and 'propertyset' flags (or a single method if access is restricted).
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Creating these implicit accessor methods also allows the rest of compiler
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to handle dispinterface properties the same way as regular ones. }
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if hasread then
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begin
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readpd.returndef:=p.propdef;
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readpd.dispid:=hdispid;
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readpd.proctypeoption:=potype_propgetter;
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create_accessor_procsym(p,readpd,'get$',palt_read);
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end;
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if haswrite then
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begin
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{ add an extra parameter, a placeholder of the value to set }
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inc(paranr);
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hparavs:=cparavarsym.create('$value',10*paranr,vs_value,p.propdef,[]);
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writepd.parast.insert(hparavs);
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writepd.proctypeoption:=potype_propsetter;
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writepd.dispid:=hdispid;
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create_accessor_procsym(p,writepd,'put$',palt_write);
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end;
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end;
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var
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sym : tsym;
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srsymtable: tsymtable;
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p : tpropertysym;
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overridden : tsym;
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varspez : tvarspez;
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hdef : tdef;
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arraytype : tdef;
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def : tdef;
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pt : tnode;
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sc : TFPObjectList;
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paranr : word;
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i : longint;
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ImplIntf : TImplementedInterface;
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found,
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gotreadorwrite: boolean;
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hreadparavs,
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hparavs : tparavarsym;
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storedprocdef: tprocvardef;
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readprocdef,
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writeprocdef : tprocdef;
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begin
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result:=nil;
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{ Generate temp procdefs to search for matching read/write
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procedures. the readprocdef will store all definitions }
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paranr:=0;
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readprocdef:=cprocdef.create(normal_function_level,true);
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writeprocdef:=cprocdef.create(normal_function_level,true);
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readprocdef.struct:=astruct;
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writeprocdef.struct:=astruct;
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if assigned(astruct) and is_classproperty then
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begin
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readprocdef.procoptions:=[po_staticmethod,po_classmethod];
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writeprocdef.procoptions:=[po_staticmethod,po_classmethod];
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end;
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if token<>_ID then
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begin
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consume(_ID);
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consume(_SEMICOLON);
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exit;
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end;
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{ Generate propertysym and insert in symtablestack }
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p:=cpropertysym.create(orgpattern);
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p.visibility:=symtablestack.top.currentvisibility;
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p.default:=longint($80000000);
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if is_classproperty then
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include(p.symoptions, sp_static);
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symtablestack.top.insert(p);
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consume(_ID);
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{ property parameters ? }
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if try_to_consume(_LECKKLAMMER) then
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begin
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if (p.visibility=vis_published) and
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not (m_delphi in current_settings.modeswitches) then
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Message(parser_e_cant_publish_that_property);
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{ create a list of the parameters }
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p.parast:=tparasymtable.create(nil,0);
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symtablestack.push(p.parast);
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sc:=TFPObjectList.create(false);
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repeat
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if try_to_consume(_VAR) then
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varspez:=vs_var
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else if try_to_consume(_CONST) then
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varspez:=vs_const
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else if try_to_consume(_CONSTREF) then
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varspez:=vs_constref
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else if (m_out in current_settings.modeswitches) and try_to_consume(_OUT) then
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varspez:=vs_out
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else
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varspez:=vs_value;
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sc.clear;
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repeat
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inc(paranr);
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hreadparavs:=cparavarsym.create(orgpattern,10*paranr,varspez,generrordef,[]);
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p.parast.insert(hreadparavs);
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sc.add(hreadparavs);
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consume(_ID);
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until not try_to_consume(_COMMA);
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if try_to_consume(_COLON) then
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begin
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if try_to_consume(_ARRAY) then
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begin
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consume(_OF);
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{ define range and type of range }
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hdef:=carraydef.create(0,-1,s32inttype);
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{ define field type }
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single_type(arraytype,[]);
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tarraydef(hdef).elementdef:=arraytype;
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end
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else
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single_type(hdef,[]);
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end
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else
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hdef:=cformaltype;
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for i:=0 to sc.count-1 do
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tparavarsym(sc[i]).vardef:=hdef;
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until not try_to_consume(_SEMICOLON);
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sc.free;
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symtablestack.pop(p.parast);
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consume(_RECKKLAMMER);
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{ the parser need to know if a property has parameters, the
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index parameter doesn't count (PFV) }
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if paranr>0 then
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begin
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p.add_accessor_parameters(readprocdef,writeprocdef);
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include(p.propoptions,ppo_hasparameters);
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end;
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end;
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{ overridden property ? }
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{ force property interface
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there is a property parameter
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a global property }
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if (token=_COLON) or (paranr>0) or (astruct=nil) then
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begin
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consume(_COLON);
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single_type(p.propdef,[stoAllowSpecialization]);
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if is_dispinterface(astruct) and not is_automatable(p.propdef) then
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Message1(type_e_not_automatable,p.propdef.typename);
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if (idtoken=_INDEX) then
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begin
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consume(_INDEX);
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pt:=comp_expr([ef_accept_equal]);
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{ Only allow enum and integer indexes. Convert all integer
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values to objpas.integer (s32int on 32- and 64-bit targets,
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s16int on 16- and 8-bit) to be compatible with delphi,
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because the procedure matching requires equal parameters }
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if is_constnode(pt) and
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is_ordinal(pt.resultdef)
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and (not is_64bitint(pt.resultdef))
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{$if defined(cpu8bitalu) or defined(cpu16bitalu)}
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and (not is_32bitint(pt.resultdef))
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{$endif}
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then
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begin
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if is_integer(pt.resultdef) then
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{$if defined(cpu8bitalu) or defined(cpu16bitalu)}
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inserttypeconv_internal(pt,s16inttype);
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{$else}
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inserttypeconv_internal(pt,s32inttype);
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{$endif}
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p.index:=tordconstnode(pt).value.svalue;
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end
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else
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begin
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Message(parser_e_invalid_property_index_value);
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p.index:=0;
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end;
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p.indexdef:=pt.resultdef;
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include(p.propoptions,ppo_indexed);
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{ concat a longint to the para templates }
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p.add_index_parameter(paranr,readprocdef,writeprocdef);
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pt.free;
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end;
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end
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else
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begin
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{ do an property override }
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if (astruct.typ=objectdef) and assigned(tobjectdef(astruct).childof) then
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overridden:=search_struct_member(tobjectdef(astruct).childof,p.name)
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else
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overridden:=nil;
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if assigned(overridden) and
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(overridden.typ=propertysym) and
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not(is_dispinterface(astruct)) then
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begin
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tpropertysym(overridden).makeduplicate(p,readprocdef,writeprocdef,paranr);
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p.register_override(tpropertysym(overridden));
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end
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else
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begin
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p.propdef:=generrordef;
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message(parser_e_no_property_found_to_override);
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end;
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end;
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{ ignore is_publishable for interfaces (related to $M+ directive).
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$M has effect on visibility of default section for classes.
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Interface has always only public section (fix for problem in tb0631.pp) }
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if ((p.visibility=vis_published) or is_dispinterface(astruct)) and
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((not(p.propdef.is_publishable) and not is_interface(astruct)) or
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(sp_static in p.symoptions)) then
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begin
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Message(parser_e_cant_publish_that_property);
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p.visibility:=vis_public;
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end;
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if not(is_dispinterface(astruct)) then
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begin
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gotreadorwrite:=false;
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{ parse accessors }
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if try_to_consume(_READ) then
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begin
|
|
gotreadorwrite:=true;
|
|
p.propaccesslist[palt_read].clear;
|
|
if parse_symlist(p.propaccesslist[palt_read],def) then
|
|
begin
|
|
sym:=p.propaccesslist[palt_read].firstsym^.sym;
|
|
{ getter is a function returning the type of the property }
|
|
if sym.typ=procsym then
|
|
begin
|
|
readprocdef.returndef:=p.propdef;
|
|
{ Insert hidden parameters }
|
|
handle_calling_convention(readprocdef);
|
|
end;
|
|
p.add_getter_or_setter_for_sym(palt_read,sym,def,readprocdef);
|
|
end;
|
|
end
|
|
else
|
|
p.inherit_accessor(palt_read);
|
|
if try_to_consume(_WRITE) then
|
|
begin
|
|
gotreadorwrite:=true;
|
|
p.propaccesslist[palt_write].clear;
|
|
if parse_symlist(p.propaccesslist[palt_write],def) then
|
|
begin
|
|
sym:=p.propaccesslist[palt_write].firstsym^.sym;
|
|
if sym.typ=procsym then
|
|
begin
|
|
{ settter is a procedure with an extra value parameter
|
|
of the of the property }
|
|
writeprocdef.returndef:=voidtype;
|
|
inc(paranr);
|
|
hparavs:=cparavarsym.create('$value',10*paranr,vs_value,p.propdef,[]);
|
|
writeprocdef.parast.insert(hparavs);
|
|
{ Insert hidden parameters }
|
|
handle_calling_convention(writeprocdef);
|
|
end;
|
|
p.add_getter_or_setter_for_sym(palt_write,sym,def,writeprocdef);
|
|
end;
|
|
end
|
|
else
|
|
p.inherit_accessor(palt_write);
|
|
{ a new property (needs to declare a getter or setter, except in
|
|
an interface }
|
|
if not(ppo_overrides in p.propoptions) and
|
|
not is_interface(astruct) and
|
|
not gotreadorwrite then
|
|
Consume(_READ);
|
|
end
|
|
else
|
|
parse_dispinterface(p,readprocdef,writeprocdef,paranr);
|
|
|
|
{ stored is not allowed for dispinterfaces, records or class properties }
|
|
if assigned(astruct) and not(is_dispinterface(astruct) or is_record(astruct)) and not is_classproperty then
|
|
begin
|
|
{ ppo_stored is default on for not overridden properties }
|
|
if not assigned(p.overriddenpropsym) then
|
|
include(p.propoptions,ppo_stored);
|
|
if try_to_consume(_STORED) then
|
|
begin
|
|
include(p.propoptions,ppo_stored);
|
|
p.propaccesslist[palt_stored].clear;
|
|
if token=_ID then
|
|
begin
|
|
{ in the case that idtoken=_DEFAULT }
|
|
{ we have to do nothing except }
|
|
{ setting ppo_stored, it's the same }
|
|
{ as stored true }
|
|
if idtoken<>_DEFAULT then
|
|
begin
|
|
{ parse_symlist cannot deal with constsyms, and
|
|
we also don't want to put constsyms in symlists
|
|
since they have to be evaluated immediately rather
|
|
than each time the property is accessed
|
|
|
|
The proper fix would be to always create a parse tree
|
|
and then convert that one, if appropriate, to a symlist.
|
|
Currently, we e.g. don't support any constant expressions
|
|
yet either here, while Delphi does.
|
|
|
|
}
|
|
{ make sure we don't let constants mask class fields/
|
|
methods
|
|
}
|
|
sym:=nil;
|
|
if (not assigned(astruct) or
|
|
(search_struct_member(astruct,pattern)=nil)) and
|
|
searchsym(pattern,sym,srsymtable) and
|
|
(sym.typ = constsym) then
|
|
begin
|
|
addsymref(sym);
|
|
if not is_boolean(tconstsym(sym).constdef) then
|
|
Message(parser_e_stored_property_must_be_boolean)
|
|
else if (tconstsym(sym).value.valueord=0) then
|
|
{ same as for _FALSE }
|
|
exclude(p.propoptions,ppo_stored)
|
|
else
|
|
{ same as for _TRUE }
|
|
p.default:=longint($80000000);
|
|
consume(_ID);
|
|
end
|
|
else if parse_symlist(p.propaccesslist[palt_stored],def) then
|
|
begin
|
|
sym:=p.propaccesslist[palt_stored].firstsym^.sym;
|
|
case sym.typ of
|
|
procsym :
|
|
begin
|
|
{ Create a temporary procvardef to handle parameters }
|
|
storedprocdef:=cprocvardef.create(normal_function_level);
|
|
include(storedprocdef.procoptions,po_methodpointer);
|
|
{ Return type must be boolean }
|
|
storedprocdef.returndef:=pasbool8type;
|
|
{ Add index parameter if needed }
|
|
if ppo_indexed in p.propoptions then
|
|
begin
|
|
hparavs:=cparavarsym.create('$index',10,vs_value,p.indexdef,[]);
|
|
storedprocdef.parast.insert(hparavs);
|
|
end;
|
|
|
|
{ Insert hidden parameters }
|
|
handle_calling_convention(storedprocdef);
|
|
p.propaccesslist[palt_stored].procdef:=Tprocsym(sym).Find_procdef_bypara(storedprocdef.paras,storedprocdef.returndef,[cpo_allowdefaults,cpo_ignorehidden]);
|
|
if not assigned(p.propaccesslist[palt_stored].procdef) then
|
|
message(parser_e_ill_property_storage_sym);
|
|
{ Not needed anymore }
|
|
storedprocdef.owner.deletedef(storedprocdef);
|
|
end;
|
|
fieldvarsym :
|
|
begin
|
|
if not assigned(def) then
|
|
internalerror(200310073);
|
|
if (ppo_hasparameters in p.propoptions) or
|
|
not(is_boolean(def)) then
|
|
Message(parser_e_stored_property_must_be_boolean);
|
|
end;
|
|
else
|
|
Message(parser_e_ill_property_access_sym);
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
if has_implicit_default(p) then
|
|
begin
|
|
p.default:=0;
|
|
end;
|
|
if not is_record(astruct) and try_to_consume(_DEFAULT) then
|
|
begin
|
|
if not allow_default_property(p) then
|
|
begin
|
|
Message(parser_e_property_cant_have_a_default_value);
|
|
{ Error recovery }
|
|
pt:=comp_expr([ef_accept_equal]);
|
|
pt.free;
|
|
end
|
|
else
|
|
begin
|
|
{ Get the result of the default, the firstpass is
|
|
needed to support values like -1 }
|
|
pt:=comp_expr([ef_accept_equal]);
|
|
if (p.propdef.typ=setdef) and
|
|
(pt.nodetype=arrayconstructorn) then
|
|
begin
|
|
arrayconstructor_to_set(pt);
|
|
do_typecheckpass(pt);
|
|
end;
|
|
inserttypeconv(pt,p.propdef);
|
|
if not(is_constnode(pt)) then
|
|
Message(parser_e_property_default_value_must_const);
|
|
{ Set default value }
|
|
case pt.nodetype of
|
|
setconstn :
|
|
p.default:=plongint(tsetconstnode(pt).value_set)^;
|
|
ordconstn :
|
|
if (Tordconstnode(pt).value<int64(low(longint))) or
|
|
(Tordconstnode(pt).value>int64(high(cardinal))) then
|
|
message3(type_e_range_check_error_bounds,tostr(Tordconstnode(pt).value),tostr(low(longint)),tostr(high(cardinal)))
|
|
else
|
|
p.default:=longint(tordconstnode(pt).value.svalue);
|
|
niln :
|
|
p.default:=0;
|
|
realconstn:
|
|
p.default:=longint(single(trealconstnode(pt).value_real));
|
|
end;
|
|
pt.free;
|
|
end;
|
|
end
|
|
else if not is_record(astruct) and try_to_consume(_NODEFAULT) then
|
|
begin
|
|
p.default:=longint($80000000);
|
|
end;
|
|
(*
|
|
else {if allow_default_property(p) then
|
|
begin
|
|
p.default:=longint($80000000);
|
|
end;
|
|
*)
|
|
{ Parse possible "implements" keyword }
|
|
if not is_record(astruct) and try_to_consume(_IMPLEMENTS) then
|
|
repeat
|
|
single_type(def,[]);
|
|
|
|
if not(is_interface(def)) then
|
|
message(parser_e_class_implements_must_be_interface);
|
|
|
|
if is_interface(p.propdef) then
|
|
begin
|
|
{ an interface type may delegate itself or one of its ancestors }
|
|
if not def_is_related(p.propdef,def) then
|
|
begin
|
|
message2(parser_e_implements_must_have_correct_type,def.typename,p.propdef.typename);
|
|
exit;
|
|
end;
|
|
end
|
|
else if is_class(p.propdef) then
|
|
begin
|
|
ImplIntf:=find_implemented_interface(tobjectdef(p.propdef),tobjectdef(def));
|
|
if assigned(ImplIntf) then
|
|
begin
|
|
if compare_defs(ImplIntf.IntfDef,def,nothingn)<te_equal then
|
|
begin
|
|
message2(parser_e_implements_must_have_correct_type,ImplIntf.IntfDef.typename,def.typename);
|
|
exit;
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
message2(parser_e_class_doesnt_implement_interface,p.propdef.typename,def.typename);
|
|
exit;
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
message(parser_e_implements_must_be_class_or_interface);
|
|
exit;
|
|
end;
|
|
|
|
|
|
if not assigned(p.propaccesslist[palt_read].firstsym) then
|
|
begin
|
|
message(parser_e_implements_must_read_specifier);
|
|
exit;
|
|
end;
|
|
if assigned(p.propaccesslist[palt_read].procdef) and
|
|
(tprocdef(p.propaccesslist[palt_read].procdef).proccalloption<>pocall_default) then
|
|
message(parser_e_implements_getter_not_default_cc);
|
|
if assigned(p.propaccesslist[palt_write].firstsym) then
|
|
begin
|
|
message(parser_e_implements_must_not_have_write_specifier);
|
|
exit;
|
|
end;
|
|
if assigned(p.propaccesslist[palt_stored].firstsym) then
|
|
begin
|
|
message(parser_e_implements_must_not_have_stored_specifier);
|
|
exit;
|
|
end;
|
|
found:=false;
|
|
ImplIntf:=nil;
|
|
for i:=0 to tobjectdef(astruct).ImplementedInterfaces.Count-1 do
|
|
begin
|
|
ImplIntf:=TImplementedInterface(tobjectdef(astruct).ImplementedInterfaces[i]);
|
|
|
|
if compare_defs(def,ImplIntf.IntfDef,nothingn)>=te_equal then
|
|
begin
|
|
found:=true;
|
|
break;
|
|
end;
|
|
end;
|
|
if found then
|
|
begin
|
|
{ An interface may not be delegated by more than one property,
|
|
it also may not have method mappings. }
|
|
if Assigned(ImplIntf.ImplementsGetter) then
|
|
message1(parser_e_duplicate_implements_clause,ImplIntf.IntfDef.typename);
|
|
if Assigned(ImplIntf.NameMappings) then
|
|
message2(parser_e_mapping_no_implements,ImplIntf.IntfDef.typename,astruct.objrealname^);
|
|
|
|
ImplIntf.ImplementsGetter:=p;
|
|
ImplIntf.VtblImplIntf:=ImplIntf;
|
|
case p.propaccesslist[palt_read].firstsym^.sym.typ of
|
|
procsym :
|
|
begin
|
|
if (po_virtualmethod in tprocdef(p.propaccesslist[palt_read].procdef).procoptions) and
|
|
not is_objectpascal_helper(tprocdef(p.propaccesslist[palt_read].procdef).struct) then
|
|
ImplIntf.IType:=etVirtualMethodResult
|
|
else
|
|
ImplIntf.IType:=etStaticMethodResult;
|
|
end;
|
|
fieldvarsym :
|
|
begin
|
|
ImplIntf.IType:=etFieldValue;
|
|
{ this must be done in a more robust way. Can't read the
|
|
fieldvarsym's fieldoffset yet, because it may not yet
|
|
be set }
|
|
ImplIntf.ImplementsField:=p.propaccesslist[palt_read].firstsym^.sym;
|
|
end
|
|
else
|
|
internalerror(200802161);
|
|
end;
|
|
if not is_interface(p.propdef) then
|
|
case ImplIntf.IType of
|
|
etVirtualMethodResult: ImplIntf.IType := etVirtualMethodClass;
|
|
etStaticMethodResult: ImplIntf.IType := etStaticMethodClass;
|
|
etFieldValue: ImplIntf.IType := etFieldValueClass;
|
|
else
|
|
internalerror(200912101);
|
|
end;
|
|
end
|
|
else
|
|
message1(parser_e_implements_uses_non_implemented_interface,def.typename);
|
|
until not try_to_consume(_COMMA);
|
|
|
|
{ remove unneeded procdefs }
|
|
if readprocdef.proctypeoption<>potype_propgetter then
|
|
readprocdef.owner.deletedef(readprocdef);
|
|
if writeprocdef.proctypeoption<>potype_propsetter then
|
|
writeprocdef.owner.deletedef(writeprocdef);
|
|
|
|
result:=p;
|
|
end;
|
|
|
|
|
|
function maybe_parse_proc_directives(def:tdef):boolean;
|
|
var
|
|
newtype : ttypesym;
|
|
begin
|
|
result:=false;
|
|
{ Process procvar directives before = and ; }
|
|
if (def.typ=procvardef) and
|
|
(def.typesym=nil) and
|
|
check_proc_directive(true) then
|
|
begin
|
|
newtype:=ctypesym.create('unnamed',def,true);
|
|
parse_var_proc_directives(tsym(newtype));
|
|
newtype.typedef:=nil;
|
|
def.typesym:=nil;
|
|
newtype.free;
|
|
result:=true;
|
|
end;
|
|
end;
|
|
|
|
|
|
const
|
|
variantrecordlevel : longint = 0;
|
|
|
|
|
|
procedure read_public_and_external_sc(sc:TFPObjectList);
|
|
var
|
|
vs: tabstractvarsym;
|
|
begin
|
|
{ only allowed for one var }
|
|
vs:=tabstractvarsym(sc[0]);
|
|
if sc.count>1 then
|
|
Message1(parser_e_directive_only_one_var,arraytokeninfo[idtoken].str);
|
|
read_public_and_external(vs);
|
|
end;
|
|
|
|
|
|
procedure read_public_and_external(vs: tabstractvarsym);
|
|
var
|
|
is_dll,
|
|
is_far,
|
|
is_cdecl,
|
|
is_external_var,
|
|
is_weak_external,
|
|
is_public_var : boolean;
|
|
dll_name,section_name,
|
|
C_name,mangledname : string;
|
|
begin
|
|
{ only allowed for one var }
|
|
{ only allow external and public on global symbols }
|
|
if vs.typ<>staticvarsym then
|
|
begin
|
|
Message(parser_e_no_local_var_external);
|
|
exit;
|
|
end;
|
|
{ defaults }
|
|
is_dll:=false;
|
|
is_far:=false;
|
|
is_cdecl:=false;
|
|
is_external_var:=false;
|
|
is_public_var:=false;
|
|
section_name := '';
|
|
dll_name := '';
|
|
C_name:=vs.realname;
|
|
|
|
{ macpas specific handling due to some switches}
|
|
if (m_mac in current_settings.modeswitches) then
|
|
begin
|
|
if (cs_external_var in current_settings.localswitches) then
|
|
begin {The effect of this is the same as if cvar; external; has been given as directives.}
|
|
is_cdecl:=true;
|
|
is_external_var:=true;
|
|
end
|
|
else if (cs_externally_visible in current_settings.localswitches) then
|
|
begin {The effect of this is the same as if cvar has been given as directives and it's made public.}
|
|
is_cdecl:=true;
|
|
is_public_var:=true;
|
|
end;
|
|
end;
|
|
|
|
{ cdecl }
|
|
if try_to_consume(_CVAR) then
|
|
begin
|
|
consume(_SEMICOLON);
|
|
is_cdecl:=true;
|
|
end;
|
|
|
|
{ external }
|
|
is_weak_external:=try_to_consume(_WEAKEXTERNAL);
|
|
if is_weak_external or
|
|
try_to_consume(_EXTERNAL) then
|
|
begin
|
|
is_external_var:=true;
|
|
{ near/far? }
|
|
if target_info.system in systems_allow_external_far_var then
|
|
begin
|
|
if try_to_consume(_FAR) then
|
|
is_far:=true
|
|
else if try_to_consume(_NEAR) then
|
|
is_far:=false;
|
|
end;
|
|
if (idtoken<>_NAME) and (token<>_SEMICOLON) then
|
|
begin
|
|
is_dll:=true;
|
|
dll_name:=get_stringconst;
|
|
if ExtractFileExt(dll_name)='' then
|
|
dll_name:=ChangeFileExt(dll_name,target_info.sharedlibext);
|
|
end;
|
|
if not(is_cdecl) and try_to_consume(_NAME) then
|
|
C_name:=get_stringconst;
|
|
consume(_SEMICOLON);
|
|
end;
|
|
|
|
{ export or public }
|
|
if idtoken in [_EXPORT,_PUBLIC] then
|
|
begin
|
|
consume(_ID);
|
|
if is_external_var then
|
|
Message(parser_e_not_external_and_export)
|
|
else
|
|
is_public_var:=true;
|
|
if try_to_consume(_NAME) then
|
|
C_name:=get_stringconst;
|
|
if (target_info.system in systems_allow_section_no_semicolon) and
|
|
(vs.typ=staticvarsym) and
|
|
try_to_consume (_SECTION) then
|
|
section_name:=get_stringconst;
|
|
consume(_SEMICOLON);
|
|
end;
|
|
|
|
{ Windows uses an indirect reference using import tables }
|
|
if is_dll and
|
|
(target_info.system in systems_all_windows) then
|
|
include(vs.varoptions,vo_is_dll_var);
|
|
|
|
{ This can only happen if vs.typ=staticvarsym }
|
|
if section_name<>'' then
|
|
begin
|
|
tstaticvarsym(vs).section:=section_name;
|
|
include(vs.varoptions,vo_has_section);
|
|
end;
|
|
|
|
|
|
{ Add C _ prefix }
|
|
if is_cdecl or
|
|
(
|
|
is_dll and
|
|
(target_info.system in systems_darwin)
|
|
) then
|
|
C_Name := target_info.Cprefix+C_Name;
|
|
|
|
if is_public_var then
|
|
begin
|
|
include(vs.varoptions,vo_is_public);
|
|
vs.varregable := vr_none;
|
|
{ mark as referenced }
|
|
inc(vs.refs);
|
|
end;
|
|
|
|
mangledname:=C_name;
|
|
{ now we can insert it in the import lib if its a dll, or
|
|
add it to the externals }
|
|
if is_external_var then
|
|
begin
|
|
if vo_is_typed_const in vs.varoptions then
|
|
Message(parser_e_initialized_not_for_external);
|
|
include(vs.varoptions,vo_is_external);
|
|
if is_far then
|
|
include(vs.varoptions,vo_is_far);
|
|
if (is_weak_external) then
|
|
begin
|
|
if not(target_info.system in systems_weak_linking) then
|
|
message(parser_e_weak_external_not_supported);
|
|
include(vs.varoptions,vo_is_weak_external);
|
|
end;
|
|
vs.varregable := vr_none;
|
|
if is_dll then
|
|
begin
|
|
if target_info.system in (systems_all_windows + systems_nativent +
|
|
[system_i386_emx, system_i386_os2]) then
|
|
mangledname:=make_dllmangledname(dll_name,C_name,0,pocall_none);
|
|
|
|
current_module.AddExternalImport(dll_name,C_Name,mangledname,0,true,false);
|
|
end
|
|
else
|
|
if tf_has_dllscanner in target_info.flags then
|
|
current_module.dllscannerinputlist.Add(vs.mangledname,vs);
|
|
end;
|
|
|
|
{ Set the assembler name }
|
|
tstaticvarsym(vs).set_mangledbasename(mangledname);
|
|
tstaticvarsym(vs).set_mangledname(mangledname);
|
|
end;
|
|
|
|
|
|
procedure try_consume_sectiondirective(var asection: ansistring);
|
|
begin
|
|
if idtoken=_SECTION then
|
|
begin
|
|
consume(_ID);
|
|
asection:=get_stringconst;
|
|
consume(_SEMICOLON);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure try_read_field_external(vs: tabstractvarsym);
|
|
var
|
|
extname: string;
|
|
begin
|
|
if try_to_consume(_EXTERNAL) then
|
|
begin
|
|
consume(_NAME);
|
|
extname:=get_stringconst;
|
|
tfieldvarsym(vs).set_externalname(extname);
|
|
consume(_SEMICOLON);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure try_read_field_external_sc(sc:TFPObjectList);
|
|
var
|
|
vs: tabstractvarsym;
|
|
begin
|
|
{ only allowed for one var }
|
|
vs:=tabstractvarsym(sc[0]);
|
|
if sc.count>1 then
|
|
Message1(parser_e_directive_only_one_var,arraytokeninfo[idtoken].str);
|
|
try_read_field_external(vs);
|
|
end;
|
|
|
|
|
|
procedure read_var_decls(options:Tvar_dec_options;out had_generic:boolean);
|
|
|
|
procedure read_default_value(sc : TFPObjectList);
|
|
var
|
|
vs : tabstractnormalvarsym;
|
|
tcsym : tstaticvarsym;
|
|
templist : tasmlist;
|
|
begin
|
|
vs:=tabstractnormalvarsym(sc[0]);
|
|
if sc.count>1 then
|
|
Message(parser_e_initialized_only_one_var);
|
|
if vo_is_thread_var in vs.varoptions then
|
|
Message(parser_e_initialized_not_for_threadvar);
|
|
consume(_EQ);
|
|
case vs.typ of
|
|
localvarsym :
|
|
begin
|
|
tcsym:=cstaticvarsym.create('$default'+vs.realname,vs_const,vs.vardef,[],true);
|
|
include(tcsym.symoptions,sp_internal);
|
|
symtablestack.top.insert(tcsym);
|
|
templist:=tasmlist.create;
|
|
read_typed_const(templist,tcsym,false);
|
|
{ in case of a generic routine, this initialisation value is not
|
|
used, and will be re-parsed during specialisations (and the
|
|
current version is not type-correct and hence breaks code
|
|
generation for LLVM) }
|
|
if not parse_generic then
|
|
begin
|
|
vs.defaultconstsym:=tcsym;
|
|
current_asmdata.asmlists[al_typedconsts].concatlist(templist);
|
|
end;
|
|
templist.free;
|
|
end;
|
|
staticvarsym :
|
|
begin
|
|
read_typed_const(current_asmdata.asmlists[al_typedconsts],tstaticvarsym(vs),false);
|
|
end;
|
|
else
|
|
internalerror(200611051);
|
|
end;
|
|
vs.varstate:=vs_initialised;
|
|
end;
|
|
|
|
{$ifdef gpc_mode}
|
|
procedure read_gpc_name(sc : TFPObjectList);
|
|
var
|
|
vs : tabstractnormalvarsym;
|
|
C_Name : string;
|
|
begin
|
|
consume(_ID);
|
|
C_Name:=get_stringconst;
|
|
vs:=tabstractnormalvarsym(sc[0]);
|
|
if sc.count>1 then
|
|
Message(parser_e_directive_only_one_var,'ABSOLUTE');
|
|
if vs.typ=staticvarsym then
|
|
begin
|
|
tstaticvarsym(vs).set_mangledname(C_Name);
|
|
include(vs.varoptions,vo_is_external);
|
|
end
|
|
else
|
|
Message(parser_e_no_local_var_external);
|
|
end;
|
|
{$endif}
|
|
|
|
procedure read_absolute(sc : TFPObjectList);
|
|
var
|
|
vs : tabstractvarsym;
|
|
abssym : tabsolutevarsym;
|
|
pt,hp : tnode;
|
|
st : tsymtable;
|
|
{$if defined(i386) or defined(i8086)}
|
|
tmpaddr : int64;
|
|
{$endif defined(i386) or defined(i8086)}
|
|
begin
|
|
abssym:=nil;
|
|
{ only allowed for one var }
|
|
vs:=tabstractvarsym(sc[0]);
|
|
if sc.count>1 then
|
|
Message1(parser_e_directive_only_one_var,'ABSOLUTE');
|
|
if vo_is_typed_const in vs.varoptions then
|
|
Message(parser_e_initialized_not_for_external);
|
|
{ parse the rest }
|
|
pt:=expr(true);
|
|
{ check allowed absolute types }
|
|
if (pt.nodetype=stringconstn) or
|
|
(is_constcharnode(pt)) then
|
|
begin
|
|
abssym:=cabsolutevarsym.create(vs.realname,vs.vardef);
|
|
abssym.fileinfo:=vs.fileinfo;
|
|
if pt.nodetype=stringconstn then
|
|
abssym.asmname:=stringdup(strpas(tstringconstnode(pt).value_str))
|
|
else
|
|
abssym.asmname:=stringdup(chr(tordconstnode(pt).value.svalue));
|
|
consume(token);
|
|
abssym.abstyp:=toasm;
|
|
end
|
|
{ address }
|
|
else if is_constintnode(pt) then
|
|
begin
|
|
abssym:=cabsolutevarsym.create(vs.realname,vs.vardef);
|
|
abssym.fileinfo:=vs.fileinfo;
|
|
abssym.abstyp:=toaddr;
|
|
{$ifndef cpu64bitaddr}
|
|
{ on 64 bit systems, abssym.addroffset is a qword and hence this
|
|
test is useless (value is a 64 bit entity) and will always fail
|
|
for positive values (since int64(high(abssym.addroffset))=-1
|
|
}
|
|
if (Tordconstnode(pt).value<int64(low(abssym.addroffset))) or
|
|
(Tordconstnode(pt).value>int64(high(abssym.addroffset))) then
|
|
message3(type_e_range_check_error_bounds,tostr(Tordconstnode(pt).value),tostr(low(abssym.addroffset)),tostr(high(abssym.addroffset)))
|
|
else
|
|
{$endif}
|
|
abssym.addroffset:=Tordconstnode(pt).value.svalue;
|
|
{$if defined(i386) or defined(i8086)}
|
|
tcpuabsolutevarsym(abssym).absseg:=false;
|
|
if (target_info.system in [system_i386_go32v2,system_i386_watcom,system_i8086_msdos,system_i8086_win16,system_i8086_embedded]) and
|
|
try_to_consume(_COLON) then
|
|
begin
|
|
pt.free;
|
|
pt:=expr(true);
|
|
if is_constintnode(pt) then
|
|
begin
|
|
{$if defined(i8086)}
|
|
tcpuabsolutevarsym(abssym).addrsegment:=abssym.addroffset;
|
|
tmpaddr:=tordconstnode(pt).value.svalue;
|
|
if (tmpaddr<int64(low(abssym.addroffset))) or
|
|
(tmpaddr>int64(high(abssym.addroffset))) then
|
|
message3(type_e_range_check_error_bounds,tostr(Tordconstnode(pt).value),tostr(low(abssym.addroffset)),tostr(high(abssym.addroffset)))
|
|
else
|
|
abssym.addroffset:=tmpaddr;
|
|
{$elseif defined(i386)}
|
|
tmpaddr:=abssym.addroffset shl 4+tordconstnode(pt).value.svalue;
|
|
if (tmpaddr<int64(low(abssym.addroffset))) or
|
|
(tmpaddr>int64(high(abssym.addroffset))) then
|
|
message3(type_e_range_check_error_bounds,tostr(Tordconstnode(pt).value),tostr(low(abssym.addroffset)),tostr(high(abssym.addroffset)))
|
|
else
|
|
abssym.addroffset:=tmpaddr;
|
|
{$endif}
|
|
tcpuabsolutevarsym(abssym).absseg:=true;
|
|
end
|
|
else
|
|
Message(type_e_ordinal_expr_expected);
|
|
end;
|
|
{$endif i386 or i8086}
|
|
end
|
|
{ variable }
|
|
else
|
|
begin
|
|
{ we have to be able to take the address of the absolute
|
|
expression
|
|
}
|
|
valid_for_addr(pt,true);
|
|
{ remove subscriptn before checking for loadn }
|
|
hp:=pt;
|
|
while (hp.nodetype in [subscriptn,typeconvn,vecn]) do
|
|
begin
|
|
{ check for implicit dereferencing and reject it }
|
|
if (hp.nodetype in [subscriptn,vecn]) then
|
|
begin
|
|
if (tunarynode(hp).left.resultdef.typ in [pointerdef,classrefdef]) then
|
|
break;
|
|
{ catch, e.g., 'var b: char absolute pchar_var[5];"
|
|
(pchar_var[5] is a pchar_2_string typeconv ->
|
|
the vecn only sees an array of char)
|
|
I don't know if all of these type conversions are
|
|
possible, but they're definitely all bad.
|
|
}
|
|
if (tunarynode(hp).left.nodetype=typeconvn) and
|
|
(ttypeconvnode(tunarynode(hp).left).convtype in
|
|
[tc_pchar_2_string,tc_pointer_2_array,
|
|
tc_intf_2_string,tc_intf_2_guid,
|
|
tc_dynarray_2_variant,tc_interface_2_variant,
|
|
tc_array_2_dynarray]) then
|
|
break;
|
|
|
|
if (tunarynode(hp).left.resultdef.typ=stringdef) and
|
|
not(tstringdef(tunarynode(hp).left.resultdef).stringtype in [st_shortstring,st_longstring]) then
|
|
break;
|
|
if (tunarynode(hp).left.resultdef.typ=objectdef) and
|
|
(tobjectdef(tunarynode(hp).left.resultdef).objecttype<>odt_object) then
|
|
break;
|
|
if is_dynamic_array(tunarynode(hp).left.resultdef) then
|
|
break;
|
|
end;
|
|
hp:=tunarynode(hp).left;
|
|
end;
|
|
if (hp.nodetype=loadn) then
|
|
begin
|
|
{ we should check the result type of loadn }
|
|
if not (tloadnode(hp).symtableentry.typ in [fieldvarsym,staticvarsym,localvarsym,paravarsym,absolutevarsym]) then
|
|
Message(parser_e_absolute_only_to_var_or_const);
|
|
abssym:=cabsolutevarsym.create(vs.realname,vs.vardef);
|
|
abssym.fileinfo:=vs.fileinfo;
|
|
abssym.abstyp:=tovar;
|
|
abssym.ref:=node_to_propaccesslist(pt);
|
|
|
|
{ if the sizes are different, can't be a regvar since you }
|
|
{ can't be "absolute upper 8 bits of a register" (except }
|
|
{ if its a record field of the same size of a record }
|
|
{ regvar, but in that case pt.resultdef.size will have }
|
|
{ the same size since it refers to the field and not to }
|
|
{ the whole record -- which is why we use pt and not hp) }
|
|
|
|
{ we can't take the size of an open array }
|
|
if is_open_array(pt.resultdef) or
|
|
(vs.vardef.size <> pt.resultdef.size) then
|
|
make_not_regable(pt,[ra_addr_regable]);
|
|
end
|
|
else
|
|
Message(parser_e_absolute_only_to_var_or_const);
|
|
end;
|
|
pt.free;
|
|
{ replace old varsym with the new absolutevarsym }
|
|
if assigned(abssym) then
|
|
begin
|
|
st:=vs.owner;
|
|
vs.owner.Delete(vs);
|
|
st.insert(abssym);
|
|
sc[0]:=abssym;
|
|
end;
|
|
end;
|
|
|
|
var
|
|
sc : TFPObjectList;
|
|
vs : tabstractvarsym;
|
|
hdef : tdef;
|
|
i : longint;
|
|
first,
|
|
isgeneric,
|
|
semicoloneaten,
|
|
allowdefaultvalue,
|
|
hasdefaultvalue : boolean;
|
|
hintsymoptions : tsymoptions;
|
|
deprecatedmsg : pshortstring;
|
|
old_block_type : tblock_type;
|
|
sectionname : ansistring;
|
|
tmp_filepos,
|
|
old_current_filepos : tfileposinfo;
|
|
begin
|
|
old_block_type:=block_type;
|
|
block_type:=bt_var;
|
|
{ Force an expected ID error message }
|
|
if not (token in [_ID,_CASE,_END]) then
|
|
consume(_ID);
|
|
{ read vars }
|
|
sc:=TFPObjectList.create(false);
|
|
first:=true;
|
|
had_generic:=false;
|
|
vs:=nil;
|
|
fillchar(tmp_filepos,sizeof(tmp_filepos),0);
|
|
while (token=_ID) do
|
|
begin
|
|
semicoloneaten:=false;
|
|
hasdefaultvalue:=false;
|
|
allowdefaultvalue:=true;
|
|
sc.clear;
|
|
repeat
|
|
if (token = _ID) then
|
|
begin
|
|
isgeneric:=(vd_check_generic in options) and
|
|
not (m_delphi in current_settings.modeswitches) and
|
|
(idtoken=_GENERIC);
|
|
case symtablestack.top.symtabletype of
|
|
localsymtable :
|
|
vs:=clocalvarsym.create(orgpattern,vs_value,generrordef,[],false);
|
|
staticsymtable,
|
|
globalsymtable :
|
|
begin
|
|
vs:=cstaticvarsym.create(orgpattern,vs_value,generrordef,[],false);
|
|
if vd_threadvar in options then
|
|
include(vs.varoptions,vo_is_thread_var);
|
|
end;
|
|
else
|
|
internalerror(200411064);
|
|
end;
|
|
sc.add(vs);
|
|
if isgeneric then
|
|
tmp_filepos:=current_filepos;
|
|
end
|
|
else
|
|
isgeneric:=false;
|
|
consume(_ID);
|
|
{ when the first variable had been read the next declaration could be
|
|
a "generic procedure", "generic function" or
|
|
"generic class (function/procedure)" }
|
|
if not first
|
|
and isgeneric
|
|
and (sc.count=1)
|
|
and (token in [_PROCEDURE,_FUNCTION,_CLASS]) then
|
|
begin
|
|
vs.free;
|
|
sc.clear;
|
|
had_generic:=true;
|
|
break;
|
|
end
|
|
else
|
|
begin
|
|
vs.register_sym;
|
|
if isgeneric then
|
|
begin
|
|
{ ensure correct error position }
|
|
old_current_filepos:=current_filepos;
|
|
current_filepos:=tmp_filepos;
|
|
symtablestack.top.insert(vs);
|
|
current_filepos:=old_current_filepos;
|
|
end
|
|
else
|
|
symtablestack.top.insert(vs);
|
|
end;
|
|
until not try_to_consume(_COMMA);
|
|
|
|
if had_generic then
|
|
break;
|
|
|
|
{ read variable type def }
|
|
block_type:=bt_var_type;
|
|
consume(_COLON);
|
|
|
|
{$ifdef gpc_mode}
|
|
if (m_gpc in current_settings.modeswitches) and
|
|
(token=_ID) and
|
|
(orgpattern='__asmname__') then
|
|
read_gpc_name(sc);
|
|
{$endif}
|
|
|
|
read_anon_type(hdef,false);
|
|
maybe_guarantee_record_typesym(hdef,symtablestack.top);
|
|
for i:=0 to sc.count-1 do
|
|
begin
|
|
vs:=tabstractvarsym(sc[i]);
|
|
vs.vardef:=hdef;
|
|
end;
|
|
block_type:=bt_var;
|
|
|
|
{ Process procvar directives }
|
|
if maybe_parse_proc_directives(hdef) then
|
|
semicoloneaten:=true;
|
|
|
|
{ check for absolute }
|
|
if try_to_consume(_ABSOLUTE) then
|
|
begin
|
|
read_absolute(sc);
|
|
allowdefaultvalue:=false;
|
|
end;
|
|
|
|
{ Check for EXTERNAL etc directives before a semicolon }
|
|
if (idtoken in [_EXPORT,_EXTERNAL,_PUBLIC,_CVAR]) or (idtoken = _WEAKEXTERNAL) then
|
|
begin
|
|
read_public_and_external_sc(sc);
|
|
allowdefaultvalue:=false;
|
|
semicoloneaten:=true;
|
|
end;
|
|
|
|
{ try to parse the hint directives }
|
|
hintsymoptions:=[];
|
|
deprecatedmsg:=nil;
|
|
try_consume_hintdirective(hintsymoptions,deprecatedmsg);
|
|
for i:=0 to sc.count-1 do
|
|
begin
|
|
vs:=tabstractvarsym(sc[i]);
|
|
vs.symoptions := vs.symoptions + hintsymoptions;
|
|
if deprecatedmsg<>nil then
|
|
vs.deprecatedmsg:=stringdup(deprecatedmsg^);
|
|
end;
|
|
stringdispose(deprecatedmsg);
|
|
|
|
{ Handling of Delphi typed const = initialized vars }
|
|
if allowdefaultvalue and
|
|
(token=_EQ) and
|
|
not(m_tp7 in current_settings.modeswitches) and
|
|
(symtablestack.top.symtabletype<>parasymtable) then
|
|
begin
|
|
{ Add calling convention for procvar }
|
|
if (hdef.typ=procvardef) and
|
|
(hdef.typesym=nil) then
|
|
handle_calling_convention(tprocvardef(hdef));
|
|
read_default_value(sc);
|
|
hasdefaultvalue:=true;
|
|
end
|
|
else
|
|
begin
|
|
if not(semicoloneaten) then
|
|
consume(_SEMICOLON);
|
|
end;
|
|
|
|
{ Support calling convention for procvars after semicolon }
|
|
if not(hasdefaultvalue) and
|
|
(hdef.typ=procvardef) and
|
|
(hdef.typesym=nil) then
|
|
begin
|
|
{ Parse procvar directives after ; }
|
|
maybe_parse_proc_directives(hdef);
|
|
{ Add calling convention for procvar }
|
|
handle_calling_convention(tprocvardef(hdef));
|
|
{ Handling of Delphi typed const = initialized vars }
|
|
if (token=_EQ) and
|
|
not(m_tp7 in current_settings.modeswitches) and
|
|
(symtablestack.top.symtabletype<>parasymtable) then
|
|
begin
|
|
read_default_value(sc);
|
|
hasdefaultvalue:=true;
|
|
end;
|
|
end;
|
|
|
|
{ Check for EXTERNAL etc directives or, in macpas, if cs_external_var is set}
|
|
if (
|
|
(
|
|
((idtoken in [_EXPORT,_EXTERNAL,_PUBLIC,_CVAR]) or (idtoken = _WEAKEXTERNAL)) and
|
|
(m_cvar_support in current_settings.modeswitches)
|
|
) or
|
|
(
|
|
(m_mac in current_settings.modeswitches) and
|
|
(
|
|
(cs_external_var in current_settings.localswitches) or
|
|
(cs_externally_visible in current_settings.localswitches)
|
|
)
|
|
)
|
|
) then
|
|
read_public_and_external_sc(sc);
|
|
|
|
{ try to parse a section directive }
|
|
if (target_info.system in systems_allow_section) and
|
|
(symtablestack.top.symtabletype in [staticsymtable,globalsymtable]) and
|
|
(idtoken=_SECTION) then
|
|
begin
|
|
try_consume_sectiondirective(sectionname);
|
|
if sectionname<>'' then
|
|
begin
|
|
for i:=0 to sc.count-1 do
|
|
begin
|
|
vs:=tabstractvarsym(sc[i]);
|
|
if (vs.varoptions *[vo_is_external,vo_is_weak_external])<>[] then
|
|
Message(parser_e_externals_no_section);
|
|
if vs.typ<>staticvarsym then
|
|
Message(parser_e_section_no_locals);
|
|
tstaticvarsym(vs).section:=sectionname;
|
|
include(vs.varoptions, vo_has_section);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
{ allocate normal variable (non-external and non-typed-const) staticvarsyms }
|
|
for i:=0 to sc.count-1 do
|
|
begin
|
|
vs:=tabstractvarsym(sc[i]);
|
|
if (vs.typ=staticvarsym) and
|
|
not(vo_is_typed_const in vs.varoptions) and
|
|
not(vo_is_external in vs.varoptions) then
|
|
cnodeutils.insertbssdata(tstaticvarsym(vs));
|
|
if vo_is_public in vs.varoptions then
|
|
current_module.add_public_asmsym(vs.mangledname,AB_GLOBAL,AT_DATA);
|
|
end;
|
|
|
|
first:=false;
|
|
end;
|
|
block_type:=old_block_type;
|
|
{ free the list }
|
|
sc.free;
|
|
end;
|
|
|
|
|
|
procedure read_record_fields(options:Tvar_dec_options; reorderlist: TFPObjectList; variantdesc : ppvariantrecdesc;out had_generic:boolean);
|
|
var
|
|
sc : TFPObjectList;
|
|
i : longint;
|
|
hs,sorg : string;
|
|
hdef,casetype,tmpdef : tdef;
|
|
{ maxsize contains the max. size of a variant }
|
|
{ startvarrec contains the start of the variant part of a record }
|
|
maxsize, startvarrecsize : longint;
|
|
usedalign,
|
|
maxalignment,startvarrecalign,
|
|
maxpadalign, startpadalign: shortint;
|
|
stowner : tdef;
|
|
pt : tnode;
|
|
fieldvs : tfieldvarsym;
|
|
hstaticvs : tstaticvarsym;
|
|
vs : tabstractvarsym;
|
|
srsym : tsym;
|
|
srsymtable : TSymtable;
|
|
visibility : tvisibility;
|
|
recst : tabstractrecordsymtable;
|
|
unionsymtable : trecordsymtable;
|
|
offset : longint;
|
|
uniondef : trecorddef;
|
|
hintsymoptions : tsymoptions;
|
|
deprecatedmsg : pshortstring;
|
|
hadgendummy,
|
|
semicoloneaten,
|
|
removeclassoption: boolean;
|
|
{$if defined(powerpc) or defined(powerpc64)}
|
|
tempdef: tdef;
|
|
is_first_type: boolean;
|
|
{$endif powerpc or powerpc64}
|
|
old_block_type: tblock_type;
|
|
begin
|
|
old_block_type:=block_type;
|
|
block_type:=bt_var;
|
|
recst:=tabstractrecordsymtable(symtablestack.top);
|
|
{$if defined(powerpc) or defined(powerpc64)}
|
|
is_first_type:=true;
|
|
{$endif powerpc or powerpc64}
|
|
{ Force an expected ID error message }
|
|
if not (token in [_ID,_CASE,_END]) then
|
|
consume(_ID);
|
|
{ read vars }
|
|
sc:=TFPObjectList.create(false);
|
|
removeclassoption:=false;
|
|
had_generic:=false;
|
|
while (token=_ID) and
|
|
not(((vd_object in options) or
|
|
((vd_record in options) and (m_advanced_records in current_settings.modeswitches))) and
|
|
((idtoken in [_PUBLIC,_PRIVATE,_PUBLISHED,_PROTECTED,_STRICT]) or
|
|
((m_final_fields in current_settings.modeswitches) and
|
|
(idtoken=_FINAL)))) do
|
|
begin
|
|
visibility:=symtablestack.top.currentvisibility;
|
|
semicoloneaten:=false;
|
|
sc.clear;
|
|
repeat
|
|
sorg:=orgpattern;
|
|
if token=_ID then
|
|
begin
|
|
vs:=cfieldvarsym.create(sorg,vs_value,generrordef,[],false);
|
|
|
|
{ normally the visibility is set via addfield, but sometimes
|
|
we collect symbols so we can add them in a batch of
|
|
potentially mixed visibility, and then the individual
|
|
symbols need to have their visibility already set }
|
|
vs.visibility:=visibility;
|
|
if (vd_check_generic in options) and (idtoken=_GENERIC) then
|
|
had_generic:=true;
|
|
end
|
|
else
|
|
vs:=nil;
|
|
consume(_ID);
|
|
if assigned(vs) and
|
|
(
|
|
not had_generic or
|
|
not (token in [_PROCEDURE,_FUNCTION,_CLASS])
|
|
) then
|
|
begin
|
|
vs.register_sym;
|
|
sc.add(vs);
|
|
recst.insert(vs);
|
|
had_generic:=false;
|
|
end
|
|
else
|
|
vs.free;
|
|
until not try_to_consume(_COMMA);
|
|
if m_delphi in current_settings.modeswitches then
|
|
block_type:=bt_var_type
|
|
else
|
|
block_type:=old_block_type;
|
|
if had_generic and (sc.count=0) then
|
|
break;
|
|
consume(_COLON);
|
|
|
|
read_anon_type(hdef,false);
|
|
maybe_guarantee_record_typesym(hdef,symtablestack.top);
|
|
block_type:=bt_var;
|
|
{ allow only static fields reference to struct where they are declared }
|
|
if not (vd_class in options) then
|
|
begin
|
|
stowner:=tdef(recst.defowner);
|
|
while assigned(stowner) and (stowner.typ in [objectdef,recorddef]) do
|
|
begin
|
|
if hdef.typ=arraydef then
|
|
begin
|
|
tmpdef:=hdef;
|
|
while (tmpdef.typ=arraydef) do
|
|
begin
|
|
{ dynamic arrays are allowed }
|
|
if ado_IsDynamicArray in tarraydef(tmpdef).arrayoptions then
|
|
begin
|
|
tmpdef:=nil;
|
|
break;
|
|
end;
|
|
tmpdef:=tarraydef(tmpdef).elementdef;
|
|
end;
|
|
end
|
|
else
|
|
tmpdef:=hdef;
|
|
if assigned(tmpdef) and
|
|
(is_object(tmpdef) or is_record(tmpdef)) and
|
|
is_owned_by(tabstractrecorddef(stowner),tabstractrecorddef(tmpdef)) then
|
|
begin
|
|
Message1(type_e_type_is_not_completly_defined, tabstractrecorddef(tmpdef).RttiName);
|
|
{ for error recovery or compiler will crash later }
|
|
hdef:=generrordef;
|
|
end;
|
|
stowner:=tdef(stowner.owner.defowner);
|
|
end;
|
|
end;
|
|
|
|
{ Process procvar directives }
|
|
if maybe_parse_proc_directives(hdef) then
|
|
semicoloneaten:=true;
|
|
|
|
{$if defined(powerpc) or defined(powerpc64)}
|
|
{ from gcc/gcc/config/rs6000/rs6000.h:
|
|
/* APPLE LOCAL begin Macintosh alignment 2002-1-22 ff */
|
|
/* Return the alignment of a struct based on the Macintosh PowerPC
|
|
alignment rules. In general the alignment of a struct is
|
|
determined by the greatest alignment of its elements. However, the
|
|
PowerPC rules cause the alignment of a struct to peg at word
|
|
alignment except when the first field has greater than word
|
|
(32-bit) alignment, in which case the alignment is determined by
|
|
the alignment of the first field. */
|
|
}
|
|
{ TODO: check whether this is also for AIX }
|
|
if (target_info.abi in [abi_powerpc_aix,abi_powerpc_darwin]) and
|
|
is_first_type and
|
|
(symtablestack.top.symtabletype=recordsymtable) and
|
|
(trecordsymtable(symtablestack.top).usefieldalignment=C_alignment) then
|
|
begin
|
|
tempdef:=hdef;
|
|
while tempdef.typ=arraydef do
|
|
tempdef:=tarraydef(tempdef).elementdef;
|
|
if tempdef.typ<>recorddef then
|
|
maxpadalign:=tempdef.alignment
|
|
else
|
|
maxpadalign:=trecorddef(tempdef).padalignment;
|
|
|
|
if (maxpadalign>4) and
|
|
(maxpadalign>trecordsymtable(symtablestack.top).padalignment) then
|
|
trecordsymtable(symtablestack.top).padalignment:=maxpadalign;
|
|
is_first_type:=false;
|
|
end;
|
|
{$endif powerpc or powerpc64}
|
|
|
|
{ types that use init/final are not allowed in variant parts, but
|
|
classes are allowed }
|
|
if (variantrecordlevel>0) then
|
|
if is_managed_type(hdef) then
|
|
Message(parser_e_cant_use_inittable_here)
|
|
else
|
|
if hdef.typ=undefineddef then
|
|
Message(parser_e_cant_use_type_parameters_here);
|
|
|
|
{ try to parse the hint directives }
|
|
hintsymoptions:=[];
|
|
deprecatedmsg:=nil;
|
|
try_consume_hintdirective(hintsymoptions,deprecatedmsg);
|
|
|
|
{ update variable type and hints }
|
|
for i:=0 to sc.count-1 do
|
|
begin
|
|
fieldvs:=tfieldvarsym(sc[i]);
|
|
fieldvs.vardef:=hdef;
|
|
{ insert any additional hint directives }
|
|
fieldvs.symoptions := fieldvs.symoptions + hintsymoptions;
|
|
if deprecatedmsg<>nil then
|
|
fieldvs.deprecatedmsg:=stringdup(deprecatedmsg^);
|
|
end;
|
|
stringdispose(deprecatedmsg);
|
|
|
|
{ Records and objects can't have default values }
|
|
{ for a record there doesn't need to be a ; before the END or ) }
|
|
if not(token in [_END,_RKLAMMER]) and
|
|
not(semicoloneaten) then
|
|
consume(_SEMICOLON);
|
|
|
|
{ Parse procvar directives after ; }
|
|
maybe_parse_proc_directives(hdef);
|
|
|
|
{ Add calling convention for procvar }
|
|
if (hdef.typ=procvardef) and
|
|
(hdef.typesym=nil) then
|
|
handle_calling_convention(tprocvardef(hdef));
|
|
|
|
if (vd_object in options) then
|
|
begin
|
|
{ if it is not a class var section and token=STATIC then it is a class field too }
|
|
if not (vd_class in options) and try_to_consume(_STATIC) then
|
|
begin
|
|
consume(_SEMICOLON);
|
|
include(options,vd_class);
|
|
removeclassoption:=true;
|
|
end;
|
|
{ Fields in Java classes/interfaces can have a separately
|
|
specified external name }
|
|
if is_java_class_or_interface(tdef(recst.defowner)) and
|
|
(oo_is_external in tobjectdef(recst.defowner).objectoptions) then
|
|
try_read_field_external_sc(sc);
|
|
end;
|
|
if (visibility=vis_published) and
|
|
not(is_class(hdef)) then
|
|
begin
|
|
MessagePos(tfieldvarsym(sc[0]).fileinfo,parser_e_cant_publish_that);
|
|
visibility:=vis_public;
|
|
end;
|
|
|
|
if (visibility=vis_published) and
|
|
not(oo_can_have_published in tobjectdef(hdef).objectoptions) and
|
|
not(m_delphi in current_settings.modeswitches) then
|
|
begin
|
|
MessagePos(tfieldvarsym(sc[0]).fileinfo,parser_e_only_publishable_classes_can_be_published);
|
|
visibility:=vis_public;
|
|
end;
|
|
if vd_class in options then
|
|
begin
|
|
{ add static flag and staticvarsyms }
|
|
for i:=0 to sc.count-1 do
|
|
begin
|
|
fieldvs:=tfieldvarsym(sc[i]);
|
|
fieldvs.visibility:=visibility;
|
|
hstaticvs:=make_field_static(recst,fieldvs);
|
|
if not parse_generic then
|
|
cnodeutils.insertbssdata(hstaticvs);
|
|
if vd_final in options then
|
|
hstaticvs.varspez:=vs_final;
|
|
end;
|
|
if removeclassoption then
|
|
begin
|
|
exclude(options,vd_class);
|
|
removeclassoption:=false;
|
|
end;
|
|
end;
|
|
if vd_final in options then
|
|
begin
|
|
{ add final flag }
|
|
for i:=0 to sc.count-1 do
|
|
begin
|
|
fieldvs:=tfieldvarsym(sc[i]);
|
|
fieldvs.varspez:=vs_final;
|
|
end;
|
|
end;
|
|
|
|
if not(vd_canreorder in options) then
|
|
{ add field(s) to the recordsymtable }
|
|
recst.addfieldlist(sc,false)
|
|
else
|
|
{ we may reorder the fields before adding them to the symbol
|
|
table }
|
|
reorderlist.concatlistcopy(sc)
|
|
end;
|
|
|
|
if m_delphi in current_settings.modeswitches then
|
|
block_type:=bt_var_type
|
|
else
|
|
block_type:=old_block_type;
|
|
{ Check for Case }
|
|
if (vd_record in options) and
|
|
try_to_consume(_CASE) then
|
|
begin
|
|
maxsize:=0;
|
|
maxalignment:=0;
|
|
maxpadalign:=0;
|
|
|
|
{ already inside a variant record? if not, setup a new variantdesc chain }
|
|
if not(assigned(variantdesc)) then
|
|
variantdesc:=@trecorddef(trecordsymtable(recst).defowner).variantrecdesc;
|
|
|
|
{ else just concat the info to the given one }
|
|
new(variantdesc^);
|
|
fillchar(variantdesc^^,sizeof(tvariantrecdesc),0);
|
|
|
|
{ including a field declaration? }
|
|
fieldvs:=nil;
|
|
sorg:=orgpattern;
|
|
hs:=pattern;
|
|
searchsym(hs,srsym,srsymtable);
|
|
if not(assigned(srsym) and (srsym.typ in [typesym,unitsym])) then
|
|
begin
|
|
consume(_ID);
|
|
consume(_COLON);
|
|
fieldvs:=cfieldvarsym.create(sorg,vs_value,generrordef,[],true);
|
|
variantdesc^^.variantselector:=fieldvs;
|
|
symtablestack.top.insert(fieldvs);
|
|
end;
|
|
read_anon_type(casetype,true);
|
|
block_type:=bt_var;
|
|
if assigned(fieldvs) then
|
|
begin
|
|
fieldvs.vardef:=casetype;
|
|
recst.addfield(fieldvs,recst.currentvisibility);
|
|
end;
|
|
if not(is_ordinal(casetype))
|
|
{$ifndef cpu64bitaddr}
|
|
or is_64bitint(casetype)
|
|
{$endif cpu64bitaddr}
|
|
then
|
|
Message(type_e_ordinal_expr_expected);
|
|
consume(_OF);
|
|
|
|
UnionSymtable:=trecordsymtable.create('',current_settings.packrecords,current_settings.alignment.recordalignmin,current_settings.alignment.maxCrecordalign);
|
|
UnionDef:=crecorddef.create('',unionsymtable);
|
|
uniondef.isunion:=true;
|
|
|
|
startvarrecsize:=UnionSymtable.datasize;
|
|
{ align the bitpacking to the next byte }
|
|
UnionSymtable.datasize:=startvarrecsize;
|
|
startvarrecalign:=UnionSymtable.fieldalignment;
|
|
startpadalign:=Unionsymtable.padalignment;
|
|
symtablestack.push(UnionSymtable);
|
|
repeat
|
|
SetLength(variantdesc^^.branches,length(variantdesc^^.branches)+1);
|
|
fillchar(variantdesc^^.branches[high(variantdesc^^.branches)],
|
|
sizeof(variantdesc^^.branches[high(variantdesc^^.branches)]),0);
|
|
repeat
|
|
pt:=comp_expr([ef_accept_equal]);
|
|
if not(pt.nodetype=ordconstn) then
|
|
Message(parser_e_illegal_expression);
|
|
{ iso pascal does not support ranges in variant record definitions }
|
|
if (([m_iso,m_extpas]*current_settings.modeswitches)=[]) and try_to_consume(_POINTPOINT) then
|
|
pt:=crangenode.create(pt,comp_expr([ef_accept_equal]))
|
|
else
|
|
begin
|
|
with variantdesc^^.branches[high(variantdesc^^.branches)] do
|
|
begin
|
|
SetLength(values,length(values)+1);
|
|
values[high(values)]:=tordconstnode(pt).value;
|
|
end;
|
|
end;
|
|
pt.free;
|
|
if token=_COMMA then
|
|
consume(_COMMA)
|
|
else
|
|
break;
|
|
until false;
|
|
if m_delphi in current_settings.modeswitches then
|
|
block_type:=bt_var_type
|
|
else
|
|
block_type:=old_block_type;
|
|
consume(_COLON);
|
|
{ read the vars }
|
|
consume(_LKLAMMER);
|
|
inc(variantrecordlevel);
|
|
if token<>_RKLAMMER then
|
|
read_record_fields([vd_record],nil,@variantdesc^^.branches[high(variantdesc^^.branches)].nestedvariant,hadgendummy);
|
|
dec(variantrecordlevel);
|
|
consume(_RKLAMMER);
|
|
|
|
{ calculates maximal variant size }
|
|
maxsize:=max(maxsize,unionsymtable.datasize);
|
|
maxalignment:=max(maxalignment,unionsymtable.fieldalignment);
|
|
maxpadalign:=max(maxpadalign,unionsymtable.padalignment);
|
|
{ the items of the next variant are overlayed }
|
|
unionsymtable.datasize:=startvarrecsize;
|
|
unionsymtable.fieldalignment:=startvarrecalign;
|
|
unionsymtable.padalignment:=startpadalign;
|
|
if (token<>_END) and (token<>_RKLAMMER) then
|
|
consume(_SEMICOLON)
|
|
else
|
|
break;
|
|
until (token=_END) or (token=_RKLAMMER);
|
|
symtablestack.pop(UnionSymtable);
|
|
{ at last set the record size to that of the biggest variant }
|
|
unionsymtable.datasize:=maxsize;
|
|
unionsymtable.fieldalignment:=maxalignment;
|
|
unionsymtable.addalignmentpadding;
|
|
{$if defined(powerpc) or defined(powerpc64)}
|
|
{ parent inherits the alignment padding if the variant is the first "field" of the parent record/variant }
|
|
if (target_info.system in [system_powerpc_darwin, system_powerpc_macos, system_powerpc64_darwin]) and
|
|
is_first_type and
|
|
(recst.usefieldalignment=C_alignment) and
|
|
(maxpadalign>recst.padalignment) then
|
|
recst.padalignment:=maxpadalign;
|
|
{$endif powerpc or powerpc64}
|
|
{ Align the offset where the union symtable is added }
|
|
case recst.usefieldalignment of
|
|
{ allow the unionsymtable to be aligned however it wants }
|
|
{ (within the global min/max limits) }
|
|
0, { default }
|
|
C_alignment:
|
|
usedalign:=used_align(unionsymtable.recordalignment,current_settings.alignment.recordalignmin,current_settings.alignment.maxCrecordalign);
|
|
{ 1 byte alignment if we are bitpacked }
|
|
bit_alignment:
|
|
usedalign:=1;
|
|
mac68k_alignment:
|
|
usedalign:=2;
|
|
{ otherwise alignment at the packrecords alignment of the }
|
|
{ current record }
|
|
else
|
|
usedalign:=used_align(recst.fieldalignment,current_settings.alignment.recordalignmin,current_settings.alignment.recordalignmax);
|
|
end;
|
|
offset:=align(recst.datasize,usedalign);
|
|
recst.datasize:=offset+unionsymtable.datasize;
|
|
|
|
if unionsymtable.recordalignment>recst.fieldalignment then
|
|
recst.fieldalignment:=unionsymtable.recordalignment;
|
|
|
|
trecordsymtable(recst).insertunionst(Unionsymtable,offset);
|
|
uniondef.owner.deletedef(uniondef);
|
|
end;
|
|
{ free the list }
|
|
sc.free;
|
|
{$ifdef powerpc}
|
|
is_first_type := false;
|
|
{$endif powerpc}
|
|
block_type:=old_block_type;
|
|
end;
|
|
|
|
end.
|