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fpc/compiler/pexpr.pas
Károly Balogh 195dbc15fa + second try on warning fix 
git-svn-id: trunk@28015 -
2014-06-20 13:36:57 +00:00

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152 KiB
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{
Copyright (c) 1998-2002 by Florian Klaempfl
Does parsing of expression for Free Pascal
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit pexpr;
{$i fpcdefs.inc}
interface
uses
symtype,symdef,symbase,
node,ncal,
tokens,globtype,globals,constexp;
{ reads a whole expression }
function expr(dotypecheck:boolean) : tnode;
{ reads an expression without assignements and .. }
function comp_expr(accept_equal,typeonly:boolean):tnode;
{ reads a single factor }
function factor(getaddr,typeonly:boolean) : tnode;
procedure string_dec(var def: tdef; allowtypedef: boolean);
function parse_paras(__colon,__namedpara : boolean;end_of_paras : ttoken) : tnode;
{ the ID token has to be consumed before calling this function }
procedure do_member_read(structh:tabstractrecorddef;getaddr:boolean;sym:tsym;var p1:tnode;var again:boolean;callflags:tcallnodeflags);
function get_intconst:TConstExprInt;
function get_stringconst:string;
{ Does some postprocessing for a generic type (especially when nested types
of the specialization are used) }
procedure post_comp_expr_gendef(var def: tdef);
implementation
uses
{ common }
cutils,
{ global }
verbose,
systems,widestr,
{ symtable }
symconst,symtable,symsym,symcpu,defutil,defcmp,
{ module }
fmodule,ppu,
{ pass 1 }
pass_1,htypechk,
nmat,nadd,nmem,nset,ncnv,ninl,ncon,nld,nflw,nbas,nutils,
{ parser }
scanner,
pbase,pinline,ptype,pgenutil,procinfo,cpuinfo
;
function sub_expr(pred_level:Toperator_precedence;accept_equal,typeonly:boolean;factornode:tnode):tnode;forward;
const
{ true, if the inherited call is anonymous }
anon_inherited : boolean = false;
{ last def found, only used by anon. inherited calls to insert proper type casts }
srdef : tdef = nil;
procedure string_dec(var def:tdef; allowtypedef: boolean);
{ reads a string type with optional length }
{ and returns a pointer to the string }
{ definition }
var
p : tnode;
begin
def:=cshortstringtype;
consume(_STRING);
if token=_LECKKLAMMER then
begin
if not(allowtypedef) then
Message(parser_e_no_local_para_def);
consume(_LECKKLAMMER);
p:=comp_expr(true,false);
if not is_constintnode(p) then
begin
Message(parser_e_illegal_expression);
{ error recovery }
consume(_RECKKLAMMER);
end
else
begin
if (tordconstnode(p).value<=0) then
begin
Message(parser_e_invalid_string_size);
tordconstnode(p).value:=255;
end;
if tordconstnode(p).value>255 then
begin
{ longstring is currently unsupported (CEC)! }
{ t:=cstringdef.createlong(tordconstnode(p).value))}
Message(parser_e_invalid_string_size);
tordconstnode(p).value:=255;
def:=cstringdef.createshort(int64(tordconstnode(p).value));
end
else
if tordconstnode(p).value<>255 then
def:=cstringdef.createshort(int64(tordconstnode(p).value));
consume(_RECKKLAMMER);
end;
p.free;
end
else
begin
if cs_refcountedstrings in current_settings.localswitches then
begin
if m_default_unicodestring in current_settings.modeswitches then
def:=cunicodestringtype
else
def:=getansistringdef
end
else
def:=cshortstringtype;
end;
end;
function parse_paras(__colon,__namedpara : boolean;end_of_paras : ttoken) : tnode;
var
p1,p2,argname : tnode;
prev_in_args,
old_named_args_allowed,
old_allow_array_constructor : boolean;
begin
if token=end_of_paras then
begin
parse_paras:=nil;
exit;
end;
{ save old values }
prev_in_args:=in_args;
old_allow_array_constructor:=allow_array_constructor;
old_named_args_allowed:=named_args_allowed;
{ set para parsing values }
in_args:=true;
named_args_allowed:=false;
allow_array_constructor:=true;
p2:=nil;
repeat
if __namedpara then
begin
if token=_COMMA then
begin
{ empty parameter }
p2:=ccallparanode.create(cnothingnode.create,p2);
end
else
begin
named_args_allowed:=true;
p1:=comp_expr(true,false);
named_args_allowed:=false;
if found_arg_name then
begin
argname:=p1;
p1:=comp_expr(true,false);
p2:=ccallparanode.create(p1,p2);
tcallparanode(p2).parametername:=argname;
end
else
p2:=ccallparanode.create(p1,p2);
found_arg_name:=false;
end;
end
else
begin
p1:=comp_expr(true,false);
p2:=ccallparanode.create(p1,p2);
end;
{ it's for the str(l:5,s); }
if __colon and (token=_COLON) then
begin
consume(_COLON);
p1:=comp_expr(true,false);
p2:=ccallparanode.create(p1,p2);
include(tcallparanode(p2).callparaflags,cpf_is_colon_para);
if try_to_consume(_COLON) then
begin
p1:=comp_expr(true,false);
p2:=ccallparanode.create(p1,p2);
include(tcallparanode(p2).callparaflags,cpf_is_colon_para);
end
end;
until not try_to_consume(_COMMA);
allow_array_constructor:=old_allow_array_constructor;
in_args:=prev_in_args;
named_args_allowed:=old_named_args_allowed;
parse_paras:=p2;
end;
function gen_c_style_operator(ntyp:tnodetype;p1,p2:tnode) : tnode;
var
hp : tnode;
hdef : tdef;
temp : ttempcreatenode;
newstatement : tstatementnode;
begin
{ Properties are not allowed, because the write can
be different from the read }
if (nf_isproperty in p1.flags) then
begin
Message(type_e_variable_id_expected);
{ We can continue with the loading,
it'll not create errors. Only the expected
result can be wrong }
end;
hp:=p1;
while assigned(hp) and
(hp.nodetype in [derefn,subscriptn,vecn,typeconvn]) do
hp:=tunarynode(hp).left;
if not assigned(hp) then
internalerror(200410121);
if (hp.nodetype=calln) then
begin
typecheckpass(p1);
result:=internalstatements(newstatement);
hdef:=getpointerdef(p1.resultdef);
temp:=ctempcreatenode.create(hdef,sizeof(pint),tt_persistent,false);
addstatement(newstatement,temp);
addstatement(newstatement,cassignmentnode.create(ctemprefnode.create(temp),caddrnode.create_internal(p1)));
addstatement(newstatement,cassignmentnode.create(
cderefnode.create(ctemprefnode.create(temp)),
caddnode.create(ntyp,
cderefnode.create(ctemprefnode.create(temp)),
p2)));
addstatement(newstatement,ctempdeletenode.create(temp));
end
else
result:=cassignmentnode.create(p1,caddnode.create(ntyp,p1.getcopy,p2));
end;
function statement_syssym(l : byte) : tnode;
var
p1,p2,paras : tnode;
err,
prev_in_args : boolean;
def : tdef;
exit_procinfo: tprocinfo;
begin
prev_in_args:=in_args;
case l of
in_new_x :
begin
if afterassignment or in_args then
statement_syssym:=new_function
else
statement_syssym:=new_dispose_statement(true);
end;
in_dispose_x :
begin
statement_syssym:=new_dispose_statement(false);
end;
in_ord_x :
begin
consume(_LKLAMMER);
in_args:=true;
p1:=comp_expr(true,false);
consume(_RKLAMMER);
p1:=geninlinenode(in_ord_x,false,p1);
statement_syssym := p1;
end;
in_exit :
begin
statement_syssym:=nil;
if try_to_consume(_LKLAMMER) then
begin
if not (m_mac in current_settings.modeswitches) then
begin
if not(try_to_consume(_RKLAMMER)) then
begin
p1:=comp_expr(true,false);
consume(_RKLAMMER);
if not assigned(current_procinfo) or
(current_procinfo.procdef.proctypeoption in [potype_constructor,potype_destructor]) or
is_void(current_procinfo.procdef.returndef) then
begin
Message(parser_e_void_function);
{ recovery }
p1.free;
p1:=nil;
end;
end
else
p1:=nil;
end
else
begin
{ non local exit ? }
if current_procinfo.procdef.procsym.name<>pattern then
begin
exit_procinfo:=current_procinfo.parent;
while assigned(exit_procinfo) do
begin
if exit_procinfo.procdef.procsym.name=pattern then
break;
exit_procinfo:=exit_procinfo.parent;
end;
if assigned(exit_procinfo) then
begin
if not(assigned(exit_procinfo.nestedexitlabel)) then
begin
include(current_procinfo.flags,pi_has_nested_exit);
exclude(current_procinfo.procdef.procoptions,po_inline);
exit_procinfo.nestedexitlabel:=clabelsym.create('$nestedexit');
{ the compiler is responsible to define this label }
exit_procinfo.nestedexitlabel.defined:=true;
exit_procinfo.nestedexitlabel.used:=true;
exit_procinfo.nestedexitlabel.jumpbuf:=clocalvarsym.create('LABEL$_'+exit_procinfo.nestedexitlabel.name,vs_value,rec_jmp_buf,[]);
exit_procinfo.procdef.localst.insert(exit_procinfo.nestedexitlabel);
exit_procinfo.procdef.localst.insert(exit_procinfo.nestedexitlabel.jumpbuf);
end;
statement_syssym:=cgotonode.create(exit_procinfo.nestedexitlabel);
tgotonode(statement_syssym).labelsym:=exit_procinfo.nestedexitlabel;
end
else
Message(parser_e_macpas_exit_wrong_param);
end;
consume(_ID);
consume(_RKLAMMER);
p1:=nil;
end
end
else
p1:=nil;
if not assigned(statement_syssym) then
statement_syssym:=cexitnode.create(p1);
end;
in_break :
begin
statement_syssym:=cbreaknode.create
end;
in_continue :
begin
statement_syssym:=ccontinuenode.create
end;
in_leave :
begin
if m_mac in current_settings.modeswitches then
statement_syssym:=cbreaknode.create
else
begin
Message1(sym_e_id_not_found, orgpattern);
statement_syssym:=cerrornode.create;
end;
end;
in_cycle :
begin
if m_mac in current_settings.modeswitches then
statement_syssym:=ccontinuenode.create
else
begin
Message1(sym_e_id_not_found, orgpattern);
statement_syssym:=cerrornode.create;
end;
end;
in_typeof_x :
begin
consume(_LKLAMMER);
in_args:=true;
p1:=comp_expr(true,false);
consume(_RKLAMMER);
if p1.nodetype=typen then
ttypenode(p1).allowed:=true;
{ Allow classrefdef, which is required for
Typeof(self) in static class methods }
if not(is_objc_class_or_protocol(p1.resultdef)) and
not(is_java_class_or_interface(p1.resultdef)) and
((p1.resultdef.typ = objectdef) or
(assigned(current_procinfo) and
((po_classmethod in current_procinfo.procdef.procoptions) or
(po_staticmethod in current_procinfo.procdef.procoptions)) and
(p1.resultdef.typ=classrefdef))) then
statement_syssym:=geninlinenode(in_typeof_x,false,p1)
else
begin
Message(parser_e_class_id_expected);
p1.destroy;
statement_syssym:=cerrornode.create;
end;
end;
in_sizeof_x,
in_bitsizeof_x :
begin
consume(_LKLAMMER);
in_args:=true;
p1:=comp_expr(true,false);
consume(_RKLAMMER);
if ((p1.nodetype<>typen) and
(
(is_object(p1.resultdef) and
(oo_has_constructor in tobjectdef(p1.resultdef).objectoptions)) or
is_open_array(p1.resultdef) or
is_array_of_const(p1.resultdef) or
is_open_string(p1.resultdef)
)) or
{ keep the function call if it is a type parameter to avoid arithmetic errors due to constant folding }
(p1.resultdef.typ=undefineddef) then
begin
statement_syssym:=geninlinenode(in_sizeof_x,false,p1);
{ no packed bit support for these things }
if l=in_bitsizeof_x then
statement_syssym:=caddnode.create(muln,statement_syssym,cordconstnode.create(8,sinttype,true));
end
else
begin
{ allow helpers for SizeOf and BitSizeOf }
if p1.nodetype=typen then
ttypenode(p1).helperallowed:=true;
if (p1.resultdef.typ=forwarddef) then
Message1(type_e_type_is_not_completly_defined,tforwarddef(p1.resultdef).tosymname^);
if (l = in_sizeof_x) or
(not((p1.nodetype = vecn) and
is_packed_array(tvecnode(p1).left.resultdef)) and
not((p1.nodetype = subscriptn) and
is_packed_record_or_object(tsubscriptnode(p1).left.resultdef))) then
begin
statement_syssym:=cordconstnode.create(p1.resultdef.size,sinttype,true);
if (l = in_bitsizeof_x) then
statement_syssym:=caddnode.create(muln,statement_syssym,cordconstnode.create(8,sinttype,true));
end
else
statement_syssym:=cordconstnode.create(p1.resultdef.packedbitsize,sinttype,true);
{ p1 not needed !}
p1.destroy;
end;
end;
in_typeinfo_x,
in_objc_encode_x :
begin
if (l=in_typeinfo_x) or
(m_objectivec1 in current_settings.modeswitches) then
begin
consume(_LKLAMMER);
in_args:=true;
p1:=comp_expr(true,false);
{ When reading a class type it is parsed as loadvmtaddrn,
typeinfo only needs the type so we remove the loadvmtaddrn }
if p1.nodetype=loadvmtaddrn then
begin
p2:=tloadvmtaddrnode(p1).left;
tloadvmtaddrnode(p1).left:=nil;
p1.free;
p1:=p2;
end;
if p1.nodetype=typen then
begin
ttypenode(p1).allowed:=true;
{ allow helpers for TypeInfo }
if l=in_typeinfo_x then
ttypenode(p1).helperallowed:=true;
end;
{ else
begin
p1.destroy;
p1:=cerrornode.create;
Message(parser_e_illegal_parameter_list);
end;}
consume(_RKLAMMER);
p2:=geninlinenode(l,false,p1);
statement_syssym:=p2;
end
else
begin
Message1(sym_e_id_not_found, orgpattern);
statement_syssym:=cerrornode.create;
end;
end;
in_aligned_x,
in_unaligned_x :
begin
err:=false;
consume(_LKLAMMER);
in_args:=true;
p1:=comp_expr(true,false);
p2:=ccallparanode.create(p1,nil);
p2:=geninlinenode(l,false,p2);
consume(_RKLAMMER);
statement_syssym:=p2;
end;
in_assigned_x :
begin
err:=false;
consume(_LKLAMMER);
in_args:=true;
p1:=comp_expr(true,false);
{ When reading a class type it is parsed as loadvmtaddrn,
typeinfo only needs the type so we remove the loadvmtaddrn }
if p1.nodetype=loadvmtaddrn then
begin
p2:=tloadvmtaddrnode(p1).left;
tloadvmtaddrnode(p1).left:=nil;
p1.free;
p1:=p2;
end;
if not codegenerror then
begin
case p1.resultdef.typ of
procdef, { procvar }
pointerdef,
procvardef,
classrefdef : ;
objectdef :
if not is_implicit_pointer_object_type(p1.resultdef) then
begin
Message(parser_e_illegal_parameter_list);
err:=true;
end;
arraydef :
if not is_dynamic_array(p1.resultdef) then
begin
Message(parser_e_illegal_parameter_list);
err:=true;
end;
else
if p1.resultdef.typ<>undefineddef then
begin
Message(parser_e_illegal_parameter_list);
err:=true;
end;
end;
end
else
err:=true;
if not err then
begin
p2:=ccallparanode.create(p1,nil);
p2:=geninlinenode(in_assigned_x,false,p2);
end
else
begin
p1.free;
p2:=cerrornode.create;
end;
consume(_RKLAMMER);
statement_syssym:=p2;
end;
in_addr_x :
begin
consume(_LKLAMMER);
in_args:=true;
p1:=comp_expr(true,false);
p1:=caddrnode.create(p1);
consume(_RKLAMMER);
statement_syssym:=p1;
end;
in_ofs_x :
begin
if target_info.system in systems_managed_vm then
message(parser_e_feature_unsupported_for_vm);
consume(_LKLAMMER);
in_args:=true;
p1:=comp_expr(true,false);
p1:=caddrnode.create(p1);
do_typecheckpass(p1);
{ Ofs() returns a cardinal/qword, not a pointer }
p1.resultdef:=uinttype;
consume(_RKLAMMER);
statement_syssym:=p1;
end;
in_seg_x :
begin
consume(_LKLAMMER);
in_args:=true;
p1:=comp_expr(true,false);
p1:=geninlinenode(in_seg_x,false,p1);
consume(_RKLAMMER);
statement_syssym:=p1;
end;
in_high_x,
in_low_x :
begin
consume(_LKLAMMER);
in_args:=true;
p1:=comp_expr(true,false);
p2:=geninlinenode(l,false,p1);
consume(_RKLAMMER);
statement_syssym:=p2;
end;
in_succ_x,
in_pred_x :
begin
consume(_LKLAMMER);
in_args:=true;
p1:=comp_expr(true,false);
p2:=geninlinenode(l,false,p1);
consume(_RKLAMMER);
statement_syssym:=p2;
end;
in_inc_x,
in_dec_x :
begin
consume(_LKLAMMER);
in_args:=true;
p1:=comp_expr(true,false);
if try_to_consume(_COMMA) then
p2:=ccallparanode.create(comp_expr(true,false),nil)
else
p2:=nil;
p2:=ccallparanode.create(p1,p2);
statement_syssym:=geninlinenode(l,false,p2);
consume(_RKLAMMER);
end;
in_slice_x:
begin
if not(in_args) then
begin
message(parser_e_illegal_slice);
consume(_LKLAMMER);
in_args:=true;
comp_expr(true,false).free;
if try_to_consume(_COMMA) then
comp_expr(true,false).free;
statement_syssym:=cerrornode.create;
consume(_RKLAMMER);
end
else
begin
consume(_LKLAMMER);
in_args:=true;
p1:=comp_expr(true,false);
Consume(_COMMA);
if not(codegenerror) then
p2:=ccallparanode.create(comp_expr(true,false),nil)
else
p2:=cerrornode.create;
p2:=ccallparanode.create(p1,p2);
statement_syssym:=geninlinenode(l,false,p2);
consume(_RKLAMMER);
end;
end;
in_initialize_x:
begin
statement_syssym:=inline_initialize;
end;
in_finalize_x:
begin
statement_syssym:=inline_finalize;
end;
in_copy_x:
begin
statement_syssym:=inline_copy;
end;
in_concat_x :
begin
consume(_LKLAMMER);
in_args:=true;
{ Translate to x:=x+y[+z]. The addnode will do the
type checking }
p2:=nil;
repeat
p1:=comp_expr(true,false);
if p2<>nil then
p2:=caddnode.create(addn,p2,p1)
else
begin
{ Force string type if it isn't yet }
if not(
(p1.resultdef.typ=stringdef) or
is_chararray(p1.resultdef) or
is_char(p1.resultdef)
) then
inserttypeconv(p1,cshortstringtype);
p2:=p1;
end;
until not try_to_consume(_COMMA);
consume(_RKLAMMER);
statement_syssym:=p2;
end;
in_read_x,
in_readln_x,
in_readstr_x:
begin
if try_to_consume(_LKLAMMER) then
begin
paras:=parse_paras(false,false,_RKLAMMER);
consume(_RKLAMMER);
end
else
paras:=nil;
p1:=geninlinenode(l,false,paras);
statement_syssym := p1;
end;
in_setlength_x:
begin
statement_syssym := inline_setlength;
end;
in_objc_selector_x:
begin
if (m_objectivec1 in current_settings.modeswitches) then
begin
consume(_LKLAMMER);
in_args:=true;
{ don't turn procsyms into calls (getaddr = true) }
p1:=factor(true,false);
p2:=geninlinenode(l,false,p1);
consume(_RKLAMMER);
statement_syssym:=p2;
end
else
begin
Message1(sym_e_id_not_found, orgpattern);
statement_syssym:=cerrornode.create;
end;
end;
in_length_x:
begin
consume(_LKLAMMER);
in_args:=true;
p1:=comp_expr(true,false);
p2:=geninlinenode(l,false,p1);
consume(_RKLAMMER);
statement_syssym:=p2;
end;
in_write_x,
in_writeln_x,
in_writestr_x :
begin
if try_to_consume(_LKLAMMER) then
begin
paras:=parse_paras(true,false,_RKLAMMER);
consume(_RKLAMMER);
end
else
paras:=nil;
p1 := geninlinenode(l,false,paras);
statement_syssym := p1;
end;
in_str_x_string :
begin
consume(_LKLAMMER);
paras:=parse_paras(true,false,_RKLAMMER);
consume(_RKLAMMER);
p1 := geninlinenode(l,false,paras);
statement_syssym := p1;
end;
in_val_x:
Begin
consume(_LKLAMMER);
in_args := true;
p1:= ccallparanode.create(comp_expr(true,false), nil);
consume(_COMMA);
p2 := ccallparanode.create(comp_expr(true,false),p1);
if try_to_consume(_COMMA) then
p2 := ccallparanode.create(comp_expr(true,false),p2);
consume(_RKLAMMER);
p2 := geninlinenode(l,false,p2);
statement_syssym := p2;
End;
in_include_x_y,
in_exclude_x_y :
begin
consume(_LKLAMMER);
in_args:=true;
p1:=comp_expr(true,false);
consume(_COMMA);
p2:=comp_expr(true,false);
statement_syssym:=geninlinenode(l,false,ccallparanode.create(p1,ccallparanode.create(p2,nil)));
consume(_RKLAMMER);
end;
in_pack_x_y_z,
in_unpack_x_y_z :
begin
consume(_LKLAMMER);
in_args:=true;
p1:=comp_expr(true,false);
consume(_COMMA);
p2:=comp_expr(true,false);
consume(_COMMA);
paras:=comp_expr(true,false);
statement_syssym:=geninlinenode(l,false,ccallparanode.create(p1,ccallparanode.create(p2,ccallparanode.create(paras,nil))));
consume(_RKLAMMER);
end;
in_assert_x_y :
begin
consume(_LKLAMMER);
in_args:=true;
p1:=comp_expr(true,false);
if try_to_consume(_COMMA) then
p2:=comp_expr(true,false)
else
begin
{ then insert an empty string }
p2:=cstringconstnode.createstr('');
end;
statement_syssym:=geninlinenode(l,false,ccallparanode.create(p1,ccallparanode.create(p2,nil)));
consume(_RKLAMMER);
end;
in_get_frame:
begin
statement_syssym:=geninlinenode(l,false,nil);
end;
(*
in_get_caller_frame:
begin
if try_to_consume(_LKLAMMER) then
begin
{You used to call get_caller_frame as get_caller_frame(get_frame),
however, as a stack frame may not exist, it does more harm than
good, so ignore it.}
in_args:=true;
p1:=comp_expr(true,false);
p1.destroy;
consume(_RKLAMMER);
end;
statement_syssym:=geninlinenode(l,false,nil);
end;
*)
in_default_x:
begin
consume(_LKLAMMER);
in_args:=true;
def:=nil;
single_type(def,[stoAllowSpecialization]);
statement_syssym:=cerrornode.create;
if def<>generrordef then
{ "type expected" error is already done by single_type }
if def.typ=forwarddef then
Message1(type_e_type_is_not_completly_defined,tforwarddef(def).tosymname^)
else
begin
statement_syssym.free;
statement_syssym:=geninlinenode(in_default_x,false,ctypenode.create(def));
end;
{ consume the right bracket here for a nicer error position }
consume(_RKLAMMER);
end;
else
internalerror(15);
end;
in_args:=prev_in_args;
end;
function maybe_load_methodpointer(st:TSymtable;var p1:tnode):boolean;
var
pd: tprocdef;
begin
maybe_load_methodpointer:=false;
if not assigned(p1) then
begin
case st.symtabletype of
withsymtable :
begin
if (st.defowner.typ=objectdef) then
p1:=tnode(twithsymtable(st).withrefnode).getcopy;
end;
ObjectSymtable,
recordsymtable:
begin
{ Escape nested procedures }
if assigned(current_procinfo) then
begin
pd:=current_procinfo.get_normal_proc.procdef;
{ We are calling from the static class method which has no self node }
if assigned(pd) and pd.no_self_node then
if st.symtabletype=recordsymtable then
p1:=ctypenode.create(pd.struct)
else
p1:=cloadvmtaddrnode.create(ctypenode.create(pd.struct))
else
p1:=load_self_node;
end
else
p1:=load_self_node;
{ We are calling a member }
maybe_load_methodpointer:=true;
end;
end;
end;
end;
{ reads the parameter for a subroutine call }
procedure do_proc_call(sym:tsym;st:TSymtable;obj:tabstractrecorddef;getaddr:boolean;var again : boolean;var p1:tnode;callflags:tcallnodeflags);
var
membercall,
prevafterassn : boolean;
i : integer;
para,p2 : tnode;
currpara : tparavarsym;
aprocdef : tprocdef;
begin
prevafterassn:=afterassignment;
afterassignment:=false;
membercall:=false;
aprocdef:=nil;
{ when it is a call to a member we need to load the
methodpointer first
}
membercall:=maybe_load_methodpointer(st,p1);
{ When we are expecting a procvar we also need
to get the address in some cases }
if assigned(getprocvardef) then
begin
if (block_type=bt_const) or
getaddr then
begin
aprocdef:=Tprocsym(sym).Find_procdef_byprocvardef(getprocvardef);
getaddr:=true;
end
else
if ((m_tp_procvar in current_settings.modeswitches) or
(m_mac_procvar in current_settings.modeswitches)) and
not(token in [_CARET,_POINT,_LKLAMMER]) then
begin
aprocdef:=Tprocsym(sym).Find_procdef_byprocvardef(getprocvardef);
if assigned(aprocdef) then
getaddr:=true;
end;
end;
{ only need to get the address of the procedure? }
if getaddr then
begin
{ Retrieve info which procvar to call. For tp_procvar the
aprocdef is already loaded above so we can reuse it }
if not assigned(aprocdef) and
assigned(getprocvardef) then
aprocdef:=Tprocsym(sym).Find_procdef_byprocvardef(getprocvardef);
{ generate a methodcallnode or proccallnode }
{ we shouldn't convert things like @tcollection.load }
p2:=cloadnode.create_procvar(sym,aprocdef,st);
if assigned(p1) then
begin
{ for loading methodpointer of an inherited function
we use self as instance and load the address of
the function directly and not through the vmt (PFV) }
if (cnf_inherited in callflags) then
begin
include(tloadnode(p2).loadnodeflags,loadnf_inherited);
p1.free;
p1:=load_self_node;
end;
if (p1.nodetype<>typen) then
tloadnode(p2).set_mp(p1)
else
p1.free;
end;
p1:=p2;
{ no postfix operators }
again:=false;
end
else
begin
para:=nil;
if anon_inherited then
begin
if not assigned(current_procinfo) then
internalerror(200305054);
for i:=0 to current_procinfo.procdef.paras.count-1 do
begin
currpara:=tparavarsym(current_procinfo.procdef.paras[i]);
if not(vo_is_hidden_para in currpara.varoptions) then
begin
{ inheritance by msgint? }
if assigned(srdef) then
{ anonymous inherited via msgid calls only require a var parameter for
both methods, so we need some type casting here }
para:=ccallparanode.create(ctypeconvnode.create_internal(ctypeconvnode.create_internal(
cloadnode.create(currpara,currpara.owner),cformaltype),tparavarsym(tprocdef(srdef).paras[i]).vardef),
para)
else
para:=ccallparanode.create(cloadnode.create(currpara,currpara.owner),para);
end;
end;
end
else
begin
if try_to_consume(_LKLAMMER) then
begin
para:=parse_paras(false,false,_RKLAMMER);
consume(_RKLAMMER);
end;
end;
{ indicate if this call was generated by a member and
no explicit self is used, this is needed to determine
how to handle a destructor call (PFV) }
if membercall then
include(callflags,cnf_member_call);
if assigned(obj) then
begin
if not (st.symtabletype in [ObjectSymtable,recordsymtable]) then
internalerror(200310031);
p1:=ccallnode.create(para,tprocsym(sym),obj.symtable,p1,callflags);
end
else
p1:=ccallnode.create(para,tprocsym(sym),st,p1,callflags);
end;
afterassignment:=prevafterassn;
end;
procedure handle_procvar(pv : tprocvardef;var p2 : tnode);
var
hp,hp2 : tnode;
hpp : ^tnode;
currprocdef : tprocdef;
begin
if not assigned(pv) then
internalerror(200301121);
if (m_tp_procvar in current_settings.modeswitches) or
(m_mac_procvar in current_settings.modeswitches) then
begin
hp:=p2;
hpp:=@p2;
while assigned(hp) and
(hp.nodetype=typeconvn) do
begin
hp:=ttypeconvnode(hp).left;
{ save orignal address of the old tree so we can replace the node }
hpp:=@hp;
end;
if (hp.nodetype=calln) and
{ a procvar can't have parameters! }
not assigned(tcallnode(hp).left) then
begin
currprocdef:=tcallnode(hp).symtableprocentry.Find_procdef_byprocvardef(pv);
if assigned(currprocdef) then
begin
hp2:=cloadnode.create_procvar(tprocsym(tcallnode(hp).symtableprocentry),currprocdef,tcallnode(hp).symtableproc);
if (po_methodpointer in pv.procoptions) then
tloadnode(hp2).set_mp(tcallnode(hp).methodpointer.getcopy);
hp.destroy;
{ replace the old callnode with the new loadnode }
hpp^:=hp2;
end;
end;
end;
end;
{ the following procedure handles the access to a property symbol }
procedure handle_propertysym(propsym : tpropertysym;st : TSymtable;var p1 : tnode);
var
paras : tnode;
p2 : tnode;
membercall : boolean;
callflags : tcallnodeflags;
propaccesslist : tpropaccesslist;
sym: tsym;
begin
{ property parameters? read them only if the property really }
{ has parameters }
paras:=nil;
if (ppo_hasparameters in propsym.propoptions) then
begin
if try_to_consume(_LECKKLAMMER) then
begin
paras:=parse_paras(false,false,_RECKKLAMMER);
consume(_RECKKLAMMER);
end;
end;
{ indexed property }
if (ppo_indexed in propsym.propoptions) then
begin
p2:=cordconstnode.create(propsym.index,propsym.indexdef,true);
paras:=ccallparanode.create(p2,paras);
end;
{ we need only a write property if a := follows }
{ if not(afterassignment) and not(in_args) then }
if token=_ASSIGNMENT then
begin
if propsym.getpropaccesslist(palt_write,propaccesslist) then
begin
sym:=propaccesslist.firstsym^.sym;
case sym.typ of
procsym :
begin
callflags:=[];
{ generate the method call }
membercall:=maybe_load_methodpointer(st,p1);
if membercall then
include(callflags,cnf_member_call);
p1:=ccallnode.create(paras,tprocsym(sym),st,p1,callflags);
addsymref(sym);
paras:=nil;
consume(_ASSIGNMENT);
{ read the expression }
if propsym.propdef.typ=procvardef then
getprocvardef:=tprocvardef(propsym.propdef);
p2:=comp_expr(true,false);
if assigned(getprocvardef) then
handle_procvar(getprocvardef,p2);
tcallnode(p1).left:=ccallparanode.create(p2,tcallnode(p1).left);
{ mark as property, both the tcallnode and the real call block }
include(p1.flags,nf_isproperty);
getprocvardef:=nil;
end;
fieldvarsym :
begin
{ generate access code }
if not handle_staticfield_access(sym,false,p1) then
propaccesslist_to_node(p1,st,propaccesslist);
include(p1.flags,nf_isproperty);
consume(_ASSIGNMENT);
{ read the expression }
p2:=comp_expr(true,false);
p1:=cassignmentnode.create(p1,p2);
end
else
begin
p1:=cerrornode.create;
Message(parser_e_no_procedure_to_access_property);
end;
end;
end
else
begin
p1:=cerrornode.create;
Message(parser_e_no_procedure_to_access_property);
end;
end
else
begin
if propsym.getpropaccesslist(palt_read,propaccesslist) then
begin
sym := propaccesslist.firstsym^.sym;
case sym.typ of
fieldvarsym :
begin
{ generate access code }
if not handle_staticfield_access(sym,false,p1) then
propaccesslist_to_node(p1,st,propaccesslist);
include(p1.flags,nf_isproperty);
{ catch expressions like "(propx):=1;" }
include(p1.flags,nf_no_lvalue);
end;
procsym :
begin
callflags:=[];
{ generate the method call }
membercall:=maybe_load_methodpointer(st,p1);
if membercall then
include(callflags,cnf_member_call);
p1:=ccallnode.create(paras,tprocsym(sym),st,p1,callflags);
paras:=nil;
include(p1.flags,nf_isproperty);
include(p1.flags,nf_no_lvalue);
end
else
begin
p1:=cerrornode.create;
Message(type_e_mismatch);
end;
end;
end
else
begin
{ error, no function to read property }
p1:=cerrornode.create;
Message(parser_e_no_procedure_to_access_property);
end;
end;
{ release paras if not used }
if assigned(paras) then
paras.free;
end;
{ the ID token has to be consumed before calling this function }
procedure do_member_read(structh:tabstractrecorddef;getaddr:boolean;sym:tsym;var p1:tnode;var again:boolean;callflags:tcallnodeflags);
var
isclassref:boolean;
begin
if sym=nil then
begin
{ pattern is still valid unless
there is another ID just after the ID of sym }
Message1(sym_e_id_no_member,orgpattern);
p1.free;
p1:=cerrornode.create;
{ try to clean up }
again:=false;
end
else
begin
if assigned(p1) then
begin
if not assigned(p1.resultdef) then
do_typecheckpass(p1);
isclassref:=(p1.resultdef.typ=classrefdef);
end
else
isclassref:=false;
{ we assume, that only procsyms and varsyms are in an object }
{ symbol table, for classes, properties are allowed }
case sym.typ of
procsym:
begin
do_proc_call(sym,sym.owner,structh,
(getaddr and not(token in [_CARET,_POINT])),
again,p1,callflags);
{ we need to know which procedure is called }
do_typecheckpass(p1);
{ calling using classref? }
if isclassref and
(p1.nodetype=calln) and
assigned(tcallnode(p1).procdefinition) then
begin
if not(po_classmethod in tcallnode(p1).procdefinition.procoptions) and
not(tcallnode(p1).procdefinition.proctypeoption=potype_constructor) then
Message(parser_e_only_class_members_via_class_ref);
{ in Java, constructors are not automatically inherited
-> calling a constructor from a parent type will create
an instance of that parent type! }
if is_javaclass(structh) and
(tcallnode(p1).procdefinition.proctypeoption=potype_constructor) and
(tcallnode(p1).procdefinition.owner.defowner<>find_real_class_definition(tobjectdef(structh),false)) then
Message(parser_e_java_no_inherited_constructor);
end;
end;
fieldvarsym:
begin
if not handle_staticfield_access(sym,true,p1) then
begin
if isclassref then
if assigned(p1) and
(
is_self_node(p1) or
(assigned(current_procinfo) and (current_procinfo.get_normal_proc.procdef.no_self_node) and
(current_procinfo.procdef.struct=structh))) then
Message(parser_e_only_class_members)
else
Message(parser_e_only_class_members_via_class_ref);
p1:=csubscriptnode.create(sym,p1);
end;
end;
propertysym:
begin
if isclassref and not (sp_static in sym.symoptions) then
Message(parser_e_only_class_members_via_class_ref);
handle_propertysym(tpropertysym(sym),sym.owner,p1);
end;
typesym:
begin
p1.free;
if try_to_consume(_LKLAMMER) then
begin
p1:=comp_expr(true,false);
consume(_RKLAMMER);
p1:=ctypeconvnode.create_explicit(p1,ttypesym(sym).typedef);
end
else
begin
p1:=ctypenode.create(ttypesym(sym).typedef);
if (is_class(ttypesym(sym).typedef) or
is_objcclass(ttypesym(sym).typedef) or
is_javaclass(ttypesym(sym).typedef)) and
not(block_type in [bt_type,bt_const_type,bt_var_type]) then
p1:=cloadvmtaddrnode.create(p1);
end;
end;
constsym:
begin
p1.free;
p1:=genconstsymtree(tconstsym(sym));
end;
staticvarsym:
begin
{ typed constant is a staticvarsym
now they are absolutevarsym }
p1.free;
p1:=cloadnode.create(sym,sym.Owner);
end;
absolutevarsym:
begin
p1.free;
p1:=nil;
{ typed constants are absolutebarsyms now to handle storage properly }
propaccesslist_to_node(p1,nil,tabsolutevarsym(sym).ref);
end
else
internalerror(16);
end;
end;
end;
function handle_factor_typenode(hdef:tdef;getaddr:boolean;var again:boolean;sym:tsym;typeonly:boolean):tnode;
var
srsym : tsym;
srsymtable : tsymtable;
begin
if sym=nil then
sym:=hdef.typesym;
{ allow Ordinal(Value) for type declarations since it
can be an enummeration declaration or a set lke:
(OrdinalType(const1)..OrdinalType(const2) }
if (not typeonly or is_ordinal(hdef)) and
try_to_consume(_LKLAMMER) then
begin
result:=comp_expr(true,false);
consume(_RKLAMMER);
{ type casts to class helpers aren't allowed }
if is_objectpascal_helper(hdef) then
Message(parser_e_no_category_as_types)
{ recovery by not creating a conversion node }
else
result:=ctypeconvnode.create_explicit(result,hdef);
end
{ not LKLAMMER }
else if (token=_POINT) and
(is_object(hdef) or is_record(hdef)) then
begin
consume(_POINT);
{ handles calling methods declared in parent objects
using "parentobject.methodname()" }
if assigned(current_structdef) and
not(getaddr) and
def_is_related(current_structdef,hdef) then
begin
result:=ctypenode.create(hdef);
ttypenode(result).typesym:=sym;
{ search also in inherited methods }
searchsym_in_class(tobjectdef(hdef),tobjectdef(current_structdef),pattern,srsym,srsymtable,[ssf_search_helper]);
if assigned(srsym) then
check_hints(srsym,srsym.symoptions,srsym.deprecatedmsg);
consume(_ID);
do_member_read(tabstractrecorddef(hdef),false,srsym,result,again,[]);
end
else
begin
{ handles:
* @TObject.Load
* static methods and variables }
result:=ctypenode.create(hdef);
ttypenode(result).typesym:=sym;
{ TP allows also @TMenu.Load if Load is only }
{ defined in an anchestor class }
srsym:=search_struct_member(tabstractrecorddef(hdef),pattern);
if assigned(srsym) then
begin
check_hints(srsym,srsym.symoptions,srsym.deprecatedmsg);
consume(_ID);
do_member_read(tabstractrecorddef(hdef),getaddr,srsym,result,again,[]);
end
else
Message1(sym_e_id_no_member,orgpattern);
end;
end
else
begin
{ Normally here would be the check against the usage
of "TClassHelper.Something", but as that might be
used inside of system symbols like sizeof and
typeinfo this check is put into ttypenode.pass_1
(for "TClassHelper" alone) and tcallnode.pass_1
(for "TClassHelper.Something") }
{ class reference ? }
if is_class(hdef) or
is_objcclass(hdef) or
{ Java interfaces also can have loadvmtaddrnodes,
e.g. for expressions such as JLClass(intftype) }
is_java_class_or_interface(hdef) then
begin
if getaddr and (token=_POINT) and
not is_javainterface(hdef) then
begin
consume(_POINT);
{ allows @Object.Method }
{ also allows static methods and variables }
result:=ctypenode.create(hdef);
ttypenode(result).typesym:=sym;
{ TP allows also @TMenu.Load if Load is only }
{ defined in an anchestor class }
srsym:=search_struct_member(tobjectdef(hdef),pattern);
if assigned(srsym) then
begin
check_hints(srsym,srsym.symoptions,srsym.deprecatedmsg);
consume(_ID);
{ in case of @Object.Method1.Method2, we have to call
Method1 -> create a loadvmtaddr node as self instead of
a typen (the typenode would be changed to self of the
current method in case Method1 is a constructor, see
mantis #24844) }
if not(block_type in [bt_type,bt_const_type,bt_var_type]) and
(srsym.typ=procsym) and
(token in [_CARET,_POINT]) then
result:=cloadvmtaddrnode.create(result);
do_member_read(tabstractrecorddef(hdef),getaddr,srsym,result,again,[]);
end
else
begin
Message1(sym_e_id_no_member,orgpattern);
consume(_ID);
end;
end
else
begin
result:=ctypenode.create(hdef);
ttypenode(result).typesym:=sym;
{ For a type block we simply return only
the type. For all other blocks we return
a loadvmt node }
if not(block_type in [bt_type,bt_const_type,bt_var_type]) then
result:=cloadvmtaddrnode.create(result);
end;
end
else
begin
result:=ctypenode.create(hdef);
ttypenode(result).typesym:=sym;
end;
end;
end;
{****************************************************************************
Factor
****************************************************************************}
function real_const_node_from_pattern(s:string):tnode;
var
d : bestreal;
code : integer;
cur : currency;
begin
val(s,d,code);
if code<>0 then
begin
Message(parser_e_error_in_real);
d:=1.0;
end;
{$ifdef FPC_REAL2REAL_FIXED}
if current_settings.fputype=fpu_none then
Message(parser_e_unsupported_real);
if (current_settings.minfpconstprec=s32real) and
(d = single(d)) then
result:=crealconstnode.create(d,s32floattype)
else if (current_settings.minfpconstprec=s64real) and
(d = double(d)) then
result:=crealconstnode.create(d,s64floattype)
else
{$endif FPC_REAL2REAL_FIXED}
result:=crealconstnode.create(d,pbestrealtype^);
{$ifdef FPC_HAS_STR_CURRENCY}
val(pattern,cur,code);
if code=0 then
trealconstnode(result).value_currency:=cur;
{$endif FPC_HAS_STR_CURRENCY}
end;
{---------------------------------------------
PostFixOperators
---------------------------------------------}
{ returns whether or not p1 has been changed }
function postfixoperators(var p1:tnode;var again:boolean;getaddr:boolean): boolean;
{ tries to avoid syntax errors after invalid qualifiers }
procedure recoverconsume_postfixops;
begin
repeat
if not try_to_consume(_CARET) then
if try_to_consume(_POINT) then
try_to_consume(_ID)
else if try_to_consume(_LECKKLAMMER) then
begin
repeat
comp_expr(true,false);
until not try_to_consume(_COMMA);
consume(_RECKKLAMMER);
end
else if try_to_consume(_LKLAMMER) then
begin
repeat
comp_expr(true,false);
until not try_to_consume(_COMMA);
consume(_RKLAMMER);
end
else
break;
until false;
end;
procedure handle_variantarray;
var
p4 : tnode;
newstatement : tstatementnode;
tempresultvariant,
temp : ttempcreatenode;
paras : tcallparanode;
newblock : tnode;
countindices : aint;
begin
{ create statements with call initialize the arguments and
call fpc_dynarr_setlength }
newblock:=internalstatements(newstatement);
{ get temp for array of indicies,
we set the real size later }
temp:=ctempcreatenode.create(s32inttype,4,tt_persistent,false);
addstatement(newstatement,temp);
countindices:=0;
repeat
p4:=comp_expr(true,false);
addstatement(newstatement,cassignmentnode.create(
ctemprefnode.create_offset(temp,countindices*s32inttype.size),p4));
inc(countindices);
until not try_to_consume(_COMMA);
{ set real size }
temp.size:=countindices*s32inttype.size;
consume(_RECKKLAMMER);
{ we need only a write access if a := follows }
if token=_ASSIGNMENT then
begin
consume(_ASSIGNMENT);
p4:=comp_expr(true,false);
{ create call to fpc_vararray_put }
paras:=ccallparanode.create(cordconstnode.create
(countindices,s32inttype,true),
ccallparanode.create(caddrnode.create_internal
(ctemprefnode.create(temp)),
ccallparanode.create(ctypeconvnode.create_internal(p4,cvarianttype),
ccallparanode.create(ctypeconvnode.create_internal(p1,cvarianttype)
,nil))));
addstatement(newstatement,ccallnode.createintern('fpc_vararray_put',paras));
addstatement(newstatement,ctempdeletenode.create(temp));
end
else
begin
{ create temp for result }
tempresultvariant:=ctempcreatenode.create(cvarianttype,cvarianttype.size,tt_persistent,true);
addstatement(newstatement,tempresultvariant);
{ create call to fpc_vararray_get }
paras:=ccallparanode.create(cordconstnode.create
(countindices,s32inttype,true),
ccallparanode.create(caddrnode.create_internal
(ctemprefnode.create(temp)),
ccallparanode.create(p1,
ccallparanode.create(
ctemprefnode.create(tempresultvariant)
,nil))));
addstatement(newstatement,ccallnode.createintern('fpc_vararray_get',paras));
addstatement(newstatement,ctempdeletenode.create(temp));
{ the last statement should return the value as
location and type, this is done be referencing the
temp and converting it first from a persistent temp to
normal temp }
addstatement(newstatement,ctempdeletenode.create_normal_temp(tempresultvariant));
addstatement(newstatement,ctemprefnode.create(tempresultvariant));
end;
p1:=newblock;
end;
function parse_array_constructor(arrdef:tarraydef): tnode;
var
newstatement,assstatement:tstatementnode;
arrnode:ttempcreatenode;
temp2:ttempcreatenode;
assnode:tnode;
paracount:integer;
begin
result:=internalstatements(newstatement);
{ create temp for result }
arrnode:=ctempcreatenode.create(arrdef,arrdef.size,tt_persistent,true);
addstatement(newstatement,arrnode);
paracount:=0;
{ check arguments and create an assignment calls }
if try_to_consume(_LKLAMMER) then
begin
assnode:=internalstatements(assstatement);
repeat
{ arr[i] := param_i }
addstatement(assstatement,
cassignmentnode.create(
cvecnode.create(
ctemprefnode.create(arrnode),
cordconstnode.create(paracount,arrdef.rangedef,false)),
comp_expr(true,false)));
inc(paracount);
until not try_to_consume(_COMMA);
consume(_RKLAMMER);
end
else
assnode:=nil;
{ get temp for array of lengths }
temp2:=ctempcreatenode.create(sinttype,sinttype.size,tt_persistent,false);
addstatement(newstatement,temp2);
{ one dimensional }
addstatement(newstatement,cassignmentnode.create(
ctemprefnode.create_offset(temp2,0),
cordconstnode.create
(paracount,s32inttype,true)));
{ create call to fpc_dynarr_setlength }
addstatement(newstatement,ccallnode.createintern('fpc_dynarray_setlength',
ccallparanode.create(caddrnode.create_internal
(ctemprefnode.create(temp2)),
ccallparanode.create(cordconstnode.create
(1,s32inttype,true),
ccallparanode.create(caddrnode.create_internal
(crttinode.create(tstoreddef(arrdef),initrtti,rdt_normal)),
ccallparanode.create(
ctypeconvnode.create_internal(
ctemprefnode.create(arrnode),voidpointertype),
nil))))
));
{ add assignment statememnts }
addstatement(newstatement,ctempdeletenode.create(temp2));
if assigned(assnode) then
addstatement(newstatement,assnode);
{ the last statement should return the value as
location and type, this is done be referencing the
temp and converting it first from a persistent temp to
normal temp }
addstatement(newstatement,ctempdeletenode.create_normal_temp(arrnode));
addstatement(newstatement,ctemprefnode.create(arrnode));
end;
function try_type_helper(var node:tnode;def:tdef):boolean;
var
srsym : tsym;
srsymtable : tsymtable;
n : tnode;
newstatement : tstatementnode;
temp : ttempcreatenode;
extdef : tdef;
begin
result:=false;
if (token=_ID) and (block_type in [bt_body,bt_general,bt_except]) then
begin
if not assigned(def) then
if node.nodetype=addrn then
{ always use the pointer type for addr nodes as otherwise
we'll have an anonymous pointertype with no name }
def:=voidpointertype
else
def:=node.resultdef;
result:=search_objectpascal_helper(def,nil,pattern,srsym,srsymtable);
if result then
begin
if not (srsymtable.symtabletype=objectsymtable) or
not is_objectpascal_helper(tdef(srsymtable.defowner)) then
internalerror(2013011401);
{ convert const node to temp node of the extended type }
if node.nodetype in (nodetype_const+[niln,addrn]) then
begin
extdef:=tobjectdef(srsymtable.defowner).extendeddef;
newstatement:=nil;
n:=internalstatements(newstatement);
temp:=ctempcreatenode.create(extdef,extdef.size,tt_persistent,false);
addstatement(newstatement,temp);
addstatement(newstatement,cassignmentnode.create(ctemprefnode.create(temp),node));
addstatement(newstatement,ctempdeletenode.create_normal_temp(temp));
addstatement(newstatement,ctemprefnode.create(temp));
node:=n;
do_typecheckpass(node)
end;
check_hints(srsym,srsym.symoptions,srsym.deprecatedmsg);
consume(_ID);
do_member_read(nil,getaddr,srsym,node,again,[]);
end;
end;
end;
var
protsym : tpropertysym;
p2,p3 : tnode;
srsym : tsym;
srsymtable : TSymtable;
structh : tabstractrecorddef;
{ shouldn't be used that often, so the extra overhead is ok to save
stack space }
dispatchstring : ansistring;
found,
haderror,
nodechanged : boolean;
calltype: tdispcalltype;
valstr,expstr : string;
intval : qword;
code : integer;
strdef : tdef;
label
skipreckklammercheck,
skippointdefcheck;
begin
result:=false;
again:=true;
while again do
begin
{ we need the resultdef }
do_typecheckpass_changed(p1,nodechanged);
result:=result or nodechanged;
if codegenerror then
begin
recoverconsume_postfixops;
exit;
end;
{ handle token }
case token of
_CARET:
begin
consume(_CARET);
{ support tp/mac procvar^ if the procvar returns a
pointer type }
if ((m_tp_procvar in current_settings.modeswitches) or
(m_mac_procvar in current_settings.modeswitches)) and
(p1.resultdef.typ=procvardef) and
(tprocvardef(p1.resultdef).returndef.typ=pointerdef) then
begin
p1:=ccallnode.create_procvar(nil,p1);
typecheckpass(p1);
end;
{ iso file buf access? }
if (m_iso in current_settings.modeswitches) and
(p1.resultdef.typ=filedef) then
begin
case tfiledef(p1.resultdef).filetyp of
ft_text:
begin
p1:=cderefnode.create(ccallnode.createintern('fpc_getbuf_text',ccallparanode.create(p1,nil)));
typecheckpass(p1);
end;
ft_typed:
begin
p1:=cderefnode.create(ctypeconvnode.create_internal(ccallnode.createintern('fpc_getbuf_typedfile',ccallparanode.create(p1,nil)),
getpointerdef(tfiledef(p1.resultdef).typedfiledef)));
typecheckpass(p1);
end;
end;
end
else if (p1.resultdef.typ<>pointerdef) then
begin
{ ^ as binary operator is a problem!!!! (FK) }
again:=false;
Message(parser_e_invalid_qualifier);
recoverconsume_postfixops;
p1.destroy;
p1:=cerrornode.create;
end
else
p1:=cderefnode.create(p1);
end;
_LECKKLAMMER:
begin
if is_class_or_interface_or_object(p1.resultdef) or
is_dispinterface(p1.resultdef) or
is_record(p1.resultdef) or
is_javaclass(p1.resultdef) then
begin
{ default property }
protsym:=search_default_property(tabstractrecorddef(p1.resultdef));
if not(assigned(protsym)) then
begin
p1.destroy;
p1:=cerrornode.create;
again:=false;
message(parser_e_no_default_property_available);
end
else
begin
{ The property symbol is referenced indirect }
protsym.IncRefCount;
handle_propertysym(protsym,protsym.owner,p1);
end;
end
else
begin
consume(_LECKKLAMMER);
repeat
{ in all of the cases below, p1 is changed }
case p1.resultdef.typ of
pointerdef:
begin
{ support delphi autoderef }
if (tpointerdef(p1.resultdef).pointeddef.typ=arraydef) and
(m_autoderef in current_settings.modeswitches) then
p1:=cderefnode.create(p1);
p2:=comp_expr(true,false);
{ Support Pbytevar[0..9] which returns array [0..9].}
if try_to_consume(_POINTPOINT) then
p2:=crangenode.create(p2,comp_expr(true,false));
p1:=cvecnode.create(p1,p2);
end;
variantdef:
begin
handle_variantarray;
{ the RECKKLAMMER is already read }
goto skipreckklammercheck;
end;
stringdef :
begin
p2:=comp_expr(true,false);
{ Support string[0..9] which returns array [0..9] of char.}
if try_to_consume(_POINTPOINT) then
p2:=crangenode.create(p2,comp_expr(true,false));
p1:=cvecnode.create(p1,p2);
end;
arraydef:
begin
p2:=comp_expr(true,false);
{ support SEG:OFS for go32v2/msdos Mem[] }
if (target_info.system in [system_i386_go32v2,system_i386_watcom,system_i8086_msdos]) and
(p1.nodetype=loadn) and
assigned(tloadnode(p1).symtableentry) and
assigned(tloadnode(p1).symtableentry.owner.name) and
(tloadnode(p1).symtableentry.owner.name^='SYSTEM') and
((tloadnode(p1).symtableentry.name='MEM') or
(tloadnode(p1).symtableentry.name='MEMW') or
(tloadnode(p1).symtableentry.name='MEML')) then
begin
{$if defined(i8086)}
consume(_COLON);
inserttypeconv(p2,u16inttype);
inserttypeconv_internal(p2,u32inttype);
p3:=cshlshrnode.create(shln,p2,cordconstnode.create($10,s16inttype,false));
p2:=comp_expr(true,false);
inserttypeconv(p2,u16inttype);
inserttypeconv_internal(p2,u32inttype);
p2:=caddnode.create(addn,p2,p3);
case tloadnode(p1).symtableentry.name of
'MEM': p2:=ctypeconvnode.create_internal(p2,bytefarpointertype);
'MEMW': p2:=ctypeconvnode.create_internal(p2,wordfarpointertype);
'MEML': p2:=ctypeconvnode.create_internal(p2,longintfarpointertype);
else
internalerror(2013053102);
end;
p1:=cderefnode.create(p2);
{$elseif defined(i386)}
if try_to_consume(_COLON) then
begin
p3:=caddnode.create(muln,cordconstnode.create($10,s32inttype,false),p2);
p2:=comp_expr(true,false);
p2:=caddnode.create(addn,p2,p3);
if try_to_consume(_POINTPOINT) then
{ Support mem[$a000:$0000..$07ff] which returns array [0..$7ff] of memtype.}
p2:=crangenode.create(p2,caddnode.create(addn,comp_expr(true,false),p3.getcopy));
p1:=cvecnode.create(p1,p2);
include(tvecnode(p1).flags,nf_memseg);
include(tvecnode(p1).flags,nf_memindex);
end
else
begin
if try_to_consume(_POINTPOINT) then
{ Support mem[$80000000..$80000002] which returns array [0..2] of memtype.}
p2:=crangenode.create(p2,comp_expr(true,false));
p1:=cvecnode.create(p1,p2);
include(tvecnode(p1).flags,nf_memindex);
end;
{$else}
internalerror(2013053101);
{$endif}
end
else
begin
if try_to_consume(_POINTPOINT) then
{ Support arrayvar[0..9] which returns array [0..9] of arraytype.}
p2:=crangenode.create(p2,comp_expr(true,false));
p1:=cvecnode.create(p1,p2);
end;
end;
else
begin
if p1.resultdef.typ<>undefineddef then
Message(parser_e_invalid_qualifier);
p1.destroy;
p1:=cerrornode.create;
comp_expr(true,false);
again:=false;
end;
end;
do_typecheckpass(p1);
until not try_to_consume(_COMMA);
consume(_RECKKLAMMER);
{ handle_variantarray eats the RECKKLAMMER and jumps here }
skipreckklammercheck:
end;
end;
_POINT :
begin
consume(_POINT);
if (p1.resultdef.typ=pointerdef) and
(m_autoderef in current_settings.modeswitches) and
{ don't auto-deref objc.id, because then the code
below for supporting id.anyobjcmethod isn't triggered }
(p1.resultdef<>objc_idtype) then
begin
p1:=cderefnode.create(p1);
do_typecheckpass(p1);
end;
{ procvar.<something> can never mean anything so always
try to call it in case it returns a record/object/... }
maybe_call_procvar(p1,false);
if (p1.nodetype=ordconstn) and
not is_boolean(p1.resultdef) and
not is_enum(p1.resultdef) then
begin
{ type helpers are checked first }
if (token=_ID) and try_type_helper(p1,nil) then
goto skippointdefcheck;
{ only an "e" or "E" can follow an intconst with a ".", the
other case (another intconst) is handled by the scanner }
if (token=_ID) and (pattern[1]='E') then
begin
haderror:=false;
if length(pattern)>1 then
begin
expstr:=copy(pattern,2,length(pattern)-1);
val(expstr,intval,code);
if code<>0 then
haderror:=true;
end
else
expstr:='';
consume(token);
if tordconstnode(p1).value.signed then
str(tordconstnode(p1).value.svalue,valstr)
else
str(tordconstnode(p1).value.uvalue,valstr);
valstr:=valstr+'.0E';
if expstr='' then
case token of
_MINUS:
begin
consume(token);
if token=_INTCONST then
begin
valstr:=valstr+'-'+pattern;
consume(token);
end
else
haderror:=true;
end;
_PLUS:
begin
consume(token);
if token=_INTCONST then
begin
valstr:=valstr+pattern;
consume(token);
end
else
haderror:=true;
end;
_INTCONST:
begin
valstr:=valstr+pattern;
consume(_INTCONST);
end;
else
haderror:=true;
end
else
valstr:=valstr+expstr;
if haderror then
begin
Message(parser_e_error_in_real);
p2:=cerrornode.create;
end
else
p2:=real_const_node_from_pattern(valstr);
p1.free;
p1:=p2;
again:=false;
goto skippointdefcheck;
end
else
begin
{ just convert the ordconst to a realconst }
p2:=crealconstnode.create(tordconstnode(p1).value,pbestrealtype^);
p1.free;
p1:=p2;
again:=false;
goto skippointdefcheck;
end;
end;
if (p1.nodetype=stringconstn) and (token=_ID) then
begin
{ the def of a string const is an array }
case tstringconstnode(p1).cst_type of
cst_conststring:
if cs_refcountedstrings in current_settings.localswitches then
if m_default_unicodestring in current_settings.modeswitches then
strdef:=cunicodestringtype
else
strdef:=cansistringtype
else
strdef:=cshortstringtype;
cst_shortstring:
strdef:=cshortstringtype;
cst_ansistring:
{ use getansistringdef? }
strdef:=cansistringtype;
cst_widestring:
strdef:=cwidestringtype;
cst_unicodestring:
strdef:=cunicodestringtype;
cst_longstring:
{ let's see when someone stumbles upon this...}
internalerror(201301111);
else
internalerror(2013112903);
end;
if try_type_helper(p1,strdef) then
goto skippointdefcheck;
end;
{ this is skipped if label skippointdefcheck is used }
case p1.resultdef.typ of
recorddef:
begin
if token=_ID then
begin
structh:=tabstractrecorddef(p1.resultdef);
searchsym_in_record(structh,pattern,srsym,srsymtable);
if assigned(srsym) then
begin
check_hints(srsym,srsym.symoptions,srsym.deprecatedmsg);
consume(_ID);
do_member_read(structh,getaddr,srsym,p1,again,[]);
end
else
begin
Message1(sym_e_id_no_member,orgpattern);
p1.destroy;
p1:=cerrornode.create;
{ try to clean up }
consume(_ID);
end;
end
else
consume(_ID);
end;
enumdef:
begin
if token=_ID then
begin
srsym:=tsym(tenumdef(p1.resultdef).symtable.Find(pattern));
if assigned(srsym) and (srsym.typ=enumsym) and (p1.nodetype=typen) then
begin
p1.destroy;
check_hints(srsym,srsym.symoptions,srsym.deprecatedmsg);
p1:=genenumnode(tenumsym(srsym));
consume(_ID);
end
else
if not try_type_helper(p1,nil) then
begin
p1.destroy;
Message1(sym_e_id_no_member,orgpattern);
p1:=cerrornode.create;
consume(_ID);
end;
end;
end;
arraydef:
begin
if is_dynamic_array(p1.resultdef) then
begin
if (token=_ID) and not try_type_helper(p1,nil) then
begin
if pattern='CREATE' then
begin
consume(_ID);
p2:=parse_array_constructor(tarraydef(p1.resultdef));
p1.destroy;
p1:=p2;
end
else
begin
Message2(scan_f_syn_expected,'CREATE',pattern);
p1.destroy;
p1:=cerrornode.create;
consume(_ID);
end;
end;
end
else
begin
Message(parser_e_invalid_qualifier);
p1.destroy;
p1:=cerrornode.create;
consume(_ID);
end;
end;
variantdef:
begin
{ dispatch call? }
{ lhs := v.ident[parameters] -> property get
lhs := v.ident(parameters) -> method call
v.ident[parameters] := rhs -> property put
v.ident(parameters) := rhs -> also property put }
if token=_ID then
begin
if not try_type_helper(p1,nil) then
begin
dispatchstring:=orgpattern;
consume(_ID);
calltype:=dct_method;
if try_to_consume(_LKLAMMER) then
begin
p2:=parse_paras(false,true,_RKLAMMER);
consume(_RKLAMMER);
end
else if try_to_consume(_LECKKLAMMER) then
begin
p2:=parse_paras(false,true,_RECKKLAMMER);
consume(_RECKKLAMMER);
calltype:=dct_propget;
end
else
p2:=nil;
{ property setter? }
if (token=_ASSIGNMENT) and not(afterassignment) then
begin
consume(_ASSIGNMENT);
{ read the expression }
p3:=comp_expr(true,false);
{ concat value parameter too }
p2:=ccallparanode.create(p3,p2);
p1:=translate_disp_call(p1,p2,dct_propput,dispatchstring,0,voidtype);
end
else
{ this is only an approximation
setting useresult if not necessary is only a waste of time, no more, no less (FK) }
if afterassignment or in_args or (token<>_SEMICOLON) then
p1:=translate_disp_call(p1,p2,calltype,dispatchstring,0,cvarianttype)
else
p1:=translate_disp_call(p1,p2,calltype,dispatchstring,0,voidtype);
end;
end
else { Error }
Consume(_ID);
end;
classrefdef:
begin
if token=_ID then
begin
structh:=tobjectdef(tclassrefdef(p1.resultdef).pointeddef);
searchsym_in_class(tobjectdef(structh),tobjectdef(structh),pattern,srsym,srsymtable,[ssf_search_helper]);
if assigned(srsym) then
begin
check_hints(srsym,srsym.symoptions,srsym.deprecatedmsg);
consume(_ID);
do_member_read(structh,getaddr,srsym,p1,again,[]);
end
else
begin
Message1(sym_e_id_no_member,orgpattern);
p1.destroy;
p1:=cerrornode.create;
{ try to clean up }
consume(_ID);
end;
end
else { Error }
Consume(_ID);
end;
objectdef:
begin
if token=_ID then
begin
structh:=tobjectdef(p1.resultdef);
searchsym_in_class(tobjectdef(structh),tobjectdef(structh),pattern,srsym,srsymtable,[ssf_search_helper]);
if assigned(srsym) then
begin
check_hints(srsym,srsym.symoptions,srsym.deprecatedmsg);
consume(_ID);
do_member_read(structh,getaddr,srsym,p1,again,[]);
end
else
begin
Message1(sym_e_id_no_member,orgpattern);
p1.destroy;
p1:=cerrornode.create;
{ try to clean up }
consume(_ID);
end;
end
else { Error }
Consume(_ID);
end;
pointerdef:
begin
if (p1.resultdef=objc_idtype) then
begin
{ objc's id type can be used to call any
Objective-C method of any Objective-C class
type that's currently in scope }
if search_objc_method(pattern,srsym,srsymtable) then
begin
consume(_ID);
do_proc_call(srsym,srsymtable,nil,
(getaddr and not(token in [_CARET,_POINT])),
again,p1,[cnf_objc_id_call]);
{ we need to know which procedure is called }
do_typecheckpass(p1);
end
else
begin
consume(_ID);
Message(parser_e_methode_id_expected);
end;
end
else
begin
if not try_type_helper(p1,nil) then
begin
Message(parser_e_invalid_qualifier);
if tpointerdef(p1.resultdef).pointeddef.typ in [recorddef,objectdef,classrefdef] then
Message(parser_h_maybe_deref_caret_missing);
end;
end
end;
else
begin
found:=try_type_helper(p1,nil);
if not found then
begin
if p1.resultdef.typ<>undefineddef then
Message(parser_e_invalid_qualifier);
p1.destroy;
p1:=cerrornode.create;
{ Error }
consume(_ID);
end;
end;
end;
{ processing an ordconstnode avoids the resultdef check }
skippointdefcheck:
end;
else
begin
{ is this a procedure variable ? }
if assigned(p1.resultdef) and
(p1.resultdef.typ=procvardef) then
begin
{ Typenode for typecasting or expecting a procvar }
if (p1.nodetype=typen) or
(
assigned(getprocvardef) and
equal_defs(p1.resultdef,getprocvardef)
) then
begin
if try_to_consume(_LKLAMMER) then
begin
p1:=comp_expr(true,false);
consume(_RKLAMMER);
p1:=ctypeconvnode.create_explicit(p1,p1.resultdef);
end
else
again:=false
end
else
begin
if try_to_consume(_LKLAMMER) then
begin
p2:=parse_paras(false,false,_RKLAMMER);
consume(_RKLAMMER);
p1:=ccallnode.create_procvar(p2,p1);
{ proc():= is never possible }
if token=_ASSIGNMENT then
begin
Message(parser_e_illegal_expression);
p1.free;
p1:=cerrornode.create;
again:=false;
end;
end
else
again:=false;
end;
end
else
again:=false;
end;
end;
{ we only try again if p1 was changed }
if again or
(p1.nodetype=errorn) then
result:=true;
end; { while again }
end;
function is_member_read(sym: tsym; st: tsymtable; var p1: tnode;
out memberparentdef: tdef): boolean;
var
hdef : tdef;
begin
result:=true;
memberparentdef:=nil;
case st.symtabletype of
ObjectSymtable,
recordsymtable:
begin
memberparentdef:=tdef(st.defowner);
exit;
end;
WithSymtable:
begin
if assigned(p1) then
internalerror(2007012002);
hdef:=tnode(twithsymtable(st).withrefnode).resultdef;
p1:=tnode(twithsymtable(st).withrefnode).getcopy;
if not(hdef.typ in [objectdef,classrefdef]) then
exit;
if (hdef.typ=classrefdef) then
hdef:=tclassrefdef(hdef).pointeddef;
memberparentdef:=hdef;
end;
else
result:=false;
end;
end;
{$maxfpuregisters 0}
function factor(getaddr,typeonly:boolean) : tnode;
{---------------------------------------------
Factor_read_id
---------------------------------------------}
procedure factor_read_id(out p1:tnode;var again:boolean);
function findwithsymtable : boolean;
var
hp : psymtablestackitem;
begin
result:=true;
hp:=symtablestack.stack;
while assigned(hp) do
begin
if hp^.symtable.symtabletype=withsymtable then
exit;
hp:=hp^.next;
end;
result:=false;
end;
var
srsym: tsym;
srsymtable: TSymtable;
hdef: tdef;
pd: tprocdef;
orgstoredpattern,
storedpattern: string;
callflags: tcallnodeflags;
t : ttoken;
unit_found : boolean;
tokenpos: tfileposinfo;
begin
{ allow post fix operators }
again:=true;
{ preinitalize tokenpos }
tokenpos:=current_filepos;
p1:=nil;
{ first check for identifier }
if token<>_ID then
begin
srsym:=generrorsym;
srsymtable:=nil;
consume(_ID);
unit_found:=false;
end
else
begin
if typeonly then
searchsym_type(pattern,srsym,srsymtable)
else
searchsym(pattern,srsym,srsymtable);
{ handle unit specification like System.Writeln }
unit_found:=try_consume_unitsym(srsym,srsymtable,t,true);
storedpattern:=pattern;
orgstoredpattern:=orgpattern;
{ store the position of the token before consuming it }
tokenpos:=current_filepos;
consume(t);
{ named parameter support }
found_arg_name:=false;
if not(unit_found) and
named_args_allowed and
(token=_ASSIGNMENT) then
begin
found_arg_name:=true;
p1:=cstringconstnode.createstr(storedpattern);
consume(_ASSIGNMENT);
exit;
end;
{ check hints, but only if it isn't a potential generic symbol;
that is checked in sub_expr if it isn't a generic }
if assigned(srsym) and
not (
(srsym.typ=typesym) and
(ttypesym(srsym).typedef.typ in [recorddef,objectdef,arraydef,procvardef,undefineddef]) and
not (sp_generic_para in srsym.symoptions) and
(token in [_LT, _LSHARPBRACKET])
) then
check_hints(srsym,srsym.symoptions,srsym.deprecatedmsg);
{ if nothing found give error and return errorsym }
if not assigned(srsym) or
{ is this a generic dummy symbol? }
((srsym.typ=typesym) and
assigned(ttypesym(srsym).typedef) and
(ttypesym(srsym).typedef.typ=undefineddef) and
not (sp_generic_para in srsym.symoptions) and
not (token in [_LT, _LSHARPBRACKET]) and
not (
{ in non-Delphi modes the generic class' name without a
"specialization" or "<T>" may be used to identify the
current class }
(sp_generic_dummy in srsym.symoptions) and
assigned(current_structdef) and
(df_generic in current_structdef.defoptions) and
not (m_delphi in current_settings.modeswitches) and
assigned(get_generic_in_hierarchy_by_name(srsym,current_structdef))
)) and
{ it could be a rename of a generic para }
{ Note: if this generates false positives we'll need to
include a "basesym" to tsym to track the original
symbol }
not (sp_explicitrename in srsym.symoptions) then
begin
{ if a generic is parsed and when we are inside an with block,
a symbol might not be defined }
if assigned(current_procinfo) and (df_generic in current_procinfo.procdef.defoptions) and
findwithsymtable then
begin
{ create dummy symbol, it will be freed later on }
srsym:=tsym.create(undefinedsym,'$undefinedsym');
srsymtable:=nil;
end
else
begin
identifier_not_found(orgstoredpattern,tokenpos);
srsym:=generrorsym;
srsymtable:=nil;
end;
end;
end;
{ Access to funcret or need to call the function? }
if (srsym.typ in [absolutevarsym,localvarsym,paravarsym]) and
(vo_is_funcret in tabstractvarsym(srsym).varoptions) and
{ result(x) is not allowed }
not(vo_is_result in tabstractvarsym(srsym).varoptions) and
(
(token=_LKLAMMER) or
(
(([m_tp7,m_delphi,m_mac,m_iso] * current_settings.modeswitches) <> []) and
(afterassignment or in_args)
)
) then
begin
hdef:=tdef(srsym.owner.defowner);
if assigned(hdef) and
(hdef.typ=procdef) then
srsym:=tprocdef(hdef).procsym
else
begin
Message(parser_e_illegal_expression);
srsym:=generrorsym;
end;
srsymtable:=srsym.owner;
end;
begin
case srsym.typ of
absolutevarsym :
begin
if (tabsolutevarsym(srsym).abstyp=tovar) then
begin
p1:=nil;
propaccesslist_to_node(p1,nil,tabsolutevarsym(srsym).ref);
p1:=ctypeconvnode.create(p1,tabsolutevarsym(srsym).vardef);
include(p1.flags,nf_absolute);
end
else
p1:=cloadnode.create(srsym,srsymtable);
end;
staticvarsym,
localvarsym,
paravarsym,
fieldvarsym :
begin
{ check if we are reading a field of an object/class/ }
{ record. is_member_read() will deal with withsymtables }
{ if needed. }
p1:=nil;
if is_member_read(srsym,srsymtable,p1,hdef) then
begin
{ if the field was originally found in an }
{ objectsymtable, it means it's part of self }
{ if only method from which it was called is }
{ not class static }
if (srsymtable.symtabletype in [ObjectSymtable,recordsymtable]) then
{ if we are accessing a owner procsym from the nested }
{ class we need to call it as a class member }
if assigned(current_structdef) and
(((current_structdef<>hdef) and is_owned_by(current_structdef,hdef)) or
(sp_static in srsym.symoptions)) then
if srsymtable.symtabletype=recordsymtable then
p1:=ctypenode.create(hdef)
else
p1:=cloadvmtaddrnode.create(ctypenode.create(hdef))
else
begin
if assigned(current_procinfo) then
begin
pd:=current_procinfo.get_normal_proc.procdef;
if assigned(pd) and pd.no_self_node then
p1:=cloadvmtaddrnode.create(ctypenode.create(pd.struct))
else
p1:=load_self_node;
end
else
p1:=load_self_node;
end;
{ now, if the field itself is part of an objectsymtab }
{ (it can be even if it was found in a withsymtable, }
{ e.g., "with classinstance do field := 5"), then }
{ let do_member_read handle it }
if (srsym.owner.symtabletype in [ObjectSymtable,recordsymtable]) then
do_member_read(tabstractrecorddef(hdef),getaddr,srsym,p1,again,[])
else
{ otherwise it's a regular record subscript }
p1:=csubscriptnode.create(srsym,p1);
end
else
{ regular non-field load }
p1:=cloadnode.create(srsym,srsymtable);
end;
syssym :
begin
p1:=statement_syssym(tsyssym(srsym).number);
end;
typesym :
begin
hdef:=ttypesym(srsym).typedef;
if not assigned(hdef) then
begin
again:=false;
end
else
begin
{ We need to know if this unit uses Variants }
if ((hdef=cvarianttype) or (hdef=colevarianttype)) and
not(cs_compilesystem in current_settings.moduleswitches) then
current_module.flags:=current_module.flags or uf_uses_variants;
p1:=handle_factor_typenode(hdef,getaddr,again,srsym,typeonly);
end;
end;
enumsym :
begin
p1:=genenumnode(tenumsym(srsym));
end;
constsym :
begin
if tconstsym(srsym).consttyp=constresourcestring then
begin
p1:=cloadnode.create(srsym,srsymtable);
do_typecheckpass(p1);
p1.resultdef:=getansistringdef;
end
else
p1:=genconstsymtree(tconstsym(srsym));
end;
procsym :
begin
p1:=nil;
{ check if it's a method/class method }
if is_member_read(srsym,srsymtable,p1,hdef) then
begin
{ if we are accessing a owner procsym from the nested }
{ class we need to call it as a class member }
if (srsymtable.symtabletype in [ObjectSymtable,recordsymtable]) and
assigned(current_structdef) and (current_structdef<>hdef) and is_owned_by(current_structdef,hdef) then
p1:=cloadvmtaddrnode.create(ctypenode.create(hdef));
{ not srsymtable.symtabletype since that can be }
{ withsymtable as well }
if (srsym.owner.symtabletype in [ObjectSymtable,recordsymtable]) then
do_member_read(tabstractrecorddef(hdef),getaddr,srsym,p1,again,[])
else
{ no procsyms in records (yet) }
internalerror(2007012006);
end
else
begin
{ regular procedure/function call }
if not unit_found then
callflags:=[]
else
callflags:=[cnf_unit_specified];
do_proc_call(srsym,srsymtable,nil,
(getaddr and not(token in [_CARET,_POINT,_LECKKLAMMER])),
again,p1,callflags);
end;
end;
propertysym :
begin
p1:=nil;
{ property of a class/object? }
if is_member_read(srsym,srsymtable,p1,hdef) then
begin
if (srsymtable.symtabletype in [ObjectSymtable,recordsymtable]) then
{ if we are accessing a owner procsym from the nested }
{ class or from a static class method we need to call }
{ it as a class member }
if (assigned(current_structdef) and (current_structdef<>hdef) and is_owned_by(current_structdef,hdef)) or
(assigned(current_procinfo) and current_procinfo.get_normal_proc.procdef.no_self_node) then
p1:=cloadvmtaddrnode.create(ctypenode.create(hdef))
else
p1:=load_self_node;
{ not srsymtable.symtabletype since that can be }
{ withsymtable as well }
if (srsym.owner.symtabletype in [ObjectSymtable,recordsymtable]) then
do_member_read(tabstractrecorddef(hdef),getaddr,srsym,p1,again,[])
else
{ no propertysyms in records (yet) }
internalerror(2009111510);
end
else
{ no method pointer }
begin
handle_propertysym(tpropertysym(srsym),srsymtable,p1);
end;
end;
labelsym :
begin
{ Support @label }
if getaddr then
begin
if srsym.owner<>current_procinfo.procdef.localst then
CGMessage(parser_e_label_outside_proc);
p1:=cloadnode.create(srsym,srsym.owner)
end
else
begin
consume(_COLON);
if tlabelsym(srsym).defined then
Message(sym_e_label_already_defined);
if symtablestack.top.symtablelevel<>srsymtable.symtablelevel then
begin
tlabelsym(srsym).nonlocal:=true;
exclude(current_procinfo.procdef.procoptions,po_inline);
end;
if tlabelsym(srsym).nonlocal and
(current_procinfo.procdef.proctypeoption in [potype_unitinit,potype_unitfinalize]) then
Message(sym_e_interprocgoto_into_init_final_code_not_allowed);
tlabelsym(srsym).defined:=true;
p1:=clabelnode.create(nil,tlabelsym(srsym));
tlabelsym(srsym).code:=p1;
end;
end;
undefinedsym :
begin
p1:=cnothingnode.Create;
p1.resultdef:=cundefineddef.create;
{ clean up previously created dummy symbol }
srsym.free;
end;
errorsym :
begin
p1:=cerrornode.create;
if try_to_consume(_LKLAMMER) then
begin
parse_paras(false,false,_RKLAMMER);
consume(_RKLAMMER);
end;
end;
else
begin
p1:=cerrornode.create;
Message(parser_e_illegal_expression);
end;
end; { end case }
if assigned(p1) and (p1.nodetype<>errorn) then
p1.fileinfo:=tokenpos;
end;
end;
{---------------------------------------------
Factor_Read_Set
---------------------------------------------}
{ Read a set between [] }
function factor_read_set:tnode;
var
p1,p2 : tnode;
lastp,
buildp : tarrayconstructornode;
old_allow_array_constructor : boolean;
begin
buildp:=nil;
lastp:=nil;
{ be sure that a least one arrayconstructn is used, also for an
empty [] }
if token=_RECKKLAMMER then
buildp:=carrayconstructornode.create(nil,buildp)
else
repeat
{ nested array constructors are not allowed, see also tests/webtbs/tw17213.pp }
old_allow_array_constructor:=allow_array_constructor;
allow_array_constructor:=false;
p1:=comp_expr(true,false);
if try_to_consume(_POINTPOINT) then
begin
p2:=comp_expr(true,false);
p1:=carrayconstructorrangenode.create(p1,p2);
end;
{ insert at the end of the tree, to get the correct order }
if not assigned(buildp) then
begin
buildp:=carrayconstructornode.create(p1,nil);
lastp:=buildp;
end
else
begin
lastp.right:=carrayconstructornode.create(p1,nil);
lastp:=tarrayconstructornode(lastp.right);
end;
allow_array_constructor:=old_allow_array_constructor;
{ there could be more elements }
until not try_to_consume(_COMMA);
factor_read_set:=buildp;
end;
function can_load_self_node: boolean;
begin
result:=false;
if (block_type in [bt_const,bt_type,bt_const_type,bt_var_type]) or
not assigned(current_structdef) or
not assigned(current_procinfo) then
exit;
result:=not current_procinfo.get_normal_proc.procdef.no_self_node;
end;
{---------------------------------------------
Factor (Main)
---------------------------------------------}
var
l : longint;
ic : int64;
qc : qword;
p1 : tnode;
code : integer;
srsym : tsym;
srsymtable : TSymtable;
pd : tprocdef;
hclassdef : tobjectdef;
d : bestreal;
hs,hsorg : string;
hdef : tdef;
filepos : tfileposinfo;
callflags : tcallnodeflags;
idstr : tidstring;
dopostfix,
again,
updatefpos,
nodechanged : boolean;
begin
{ can't keep a copy of p1 and compare pointers afterwards, because
p1 may be freed and reallocated in the same place! }
dopostfix:=true;
updatefpos:=false;
p1:=nil;
filepos:=current_tokenpos;
again:=false;
pd:=nil;
if token=_ID then
begin
again:=true;
{ Handle references to self }
if (idtoken=_SELF) and can_load_self_node then
begin
p1:=load_self_node;
consume(_ID);
again:=true;
end
else
factor_read_id(p1,again);
if assigned(p1) then
begin
{ factor_read_id will set the filepos to after the id,
and in case of _SELF the filepos will already be the
same as filepos (so setting it again doesn't hurt). }
p1.fileinfo:=filepos;
filepos:=current_tokenpos;
end;
{ handle post fix operators }
if (m_delphi in current_settings.modeswitches) and
(block_type=bt_body) and
(token in [_LT,_LSHARPBRACKET]) then
begin
if p1.nodetype=typen then
idstr:=ttypenode(p1).typesym.name
else
if (p1.nodetype=loadvmtaddrn) and
(tloadvmtaddrnode(p1).left.nodetype=typen) then
idstr:=ttypenode(tloadvmtaddrnode(p1).left).typesym.name
else
if (p1.nodetype=loadn) then
idstr:=tloadnode(p1).symtableentry.name
else
idstr:='';
{ if this is the case then the postfix handling is done in
sub_expr if necessary }
dopostfix:=not could_be_generic(idstr);
end;
if dopostfix then
updatefpos:=postfixoperators(p1,again,getaddr);
end
else
begin
updatefpos:=true;
case token of
_RETURN :
begin
consume(_RETURN);
if not(token in [_SEMICOLON,_ELSE,_END]) then
p1 := cexitnode.create(comp_expr(true,false))
else
p1 := cexitnode.create(nil);
end;
_INHERITED :
begin
again:=true;
consume(_INHERITED);
if assigned(current_procinfo) and
assigned(current_structdef) and
((current_structdef.typ=objectdef) or
((target_info.system in systems_jvm) and
(current_structdef.typ=recorddef)))then
begin
{ for record helpers in mode Delphi "inherited" is not
allowed }
if is_objectpascal_helper(current_structdef) and
(m_delphi in current_settings.modeswitches) and
is_record(tobjectdef(current_structdef).extendeddef) then
Message(parser_e_inherited_not_in_record);
if (current_structdef.typ=objectdef) then
begin
hclassdef:=tobjectdef(current_structdef).childof;
{ Objective-C categories *replace* methods in the class
they extend, or add methods to it. So calling an
inherited method always calls the method inherited from
the parent of the extended class }
if is_objccategory(current_structdef) then
hclassdef:=hclassdef.childof;
end
else if target_info.system in systems_jvm then
hclassdef:=java_fpcbaserecordtype
else
internalerror(2012012401);
{ if inherited; only then we need the method with
the same name }
if token <> _ID then
begin
hs:=current_procinfo.procdef.procsym.name;
hsorg:=current_procinfo.procdef.procsym.realname;
anon_inherited:=true;
{ For message methods we need to search using the message
number or string }
pd:=tprocdef(tprocsym(current_procinfo.procdef.procsym).ProcdefList[0]);
srdef:=nil;
if (po_msgint in pd.procoptions) then
searchsym_in_class_by_msgint(hclassdef,pd.messageinf.i,srdef,srsym,srsymtable)
else
if (po_msgstr in pd.procoptions) then
searchsym_in_class_by_msgstr(hclassdef,pd.messageinf.str^,srsym,srsymtable)
else
{ helpers have their own ways of dealing with inherited }
if is_objectpascal_helper(current_structdef) then
searchsym_in_helper(tobjectdef(current_structdef),tobjectdef(current_structdef),hs,srsym,srsymtable,[ssf_has_inherited])
else
searchsym_in_class(hclassdef,current_structdef,hs,srsym,srsymtable,[ssf_search_helper]);
end
else
begin
hs:=pattern;
hsorg:=orgpattern;
consume(_ID);
anon_inherited:=false;
{ helpers have their own ways of dealing with inherited }
if is_objectpascal_helper(current_structdef) then
searchsym_in_helper(tobjectdef(current_structdef),tobjectdef(current_structdef),hs,srsym,srsymtable,[ssf_has_inherited])
else
searchsym_in_class(hclassdef,current_structdef,hs,srsym,srsymtable,[ssf_search_helper]);
end;
if assigned(srsym) then
begin
check_hints(srsym,srsym.symoptions,srsym.deprecatedmsg);
{ load the procdef from the inherited class and
not from self }
case srsym.typ of
procsym:
begin
if is_objectpascal_helper(current_structdef) then
begin
{ for a helper load the procdef either from the
extended type, from the parent helper or from
the extended type of the parent helper
depending on the def the found symbol belongs
to }
if (srsym.Owner.defowner.typ=objectdef) and
is_objectpascal_helper(tobjectdef(srsym.Owner.defowner)) then
if def_is_related(current_structdef,tdef(srsym.Owner.defowner)) and
assigned(tobjectdef(current_structdef).childof) then
hdef:=tobjectdef(current_structdef).childof
else
hdef:=tobjectdef(srsym.Owner.defowner).extendeddef
else
hdef:=tdef(srsym.Owner.defowner);
end
else
hdef:=hclassdef;
if (po_classmethod in current_procinfo.procdef.procoptions) or
(po_staticmethod in current_procinfo.procdef.procoptions) then
hdef:=cclassrefdef.create(hdef);
p1:=ctypenode.create(hdef);
{ we need to allow helpers here }
ttypenode(p1).helperallowed:=true;
end;
propertysym:
;
else
begin
Message(parser_e_methode_id_expected);
p1:=cerrornode.create;
end;
end;
callflags:=[cnf_inherited];
include(current_procinfo.flags,pi_has_inherited);
if anon_inherited then
include(callflags,cnf_anon_inherited);
do_member_read(hclassdef,getaddr,srsym,p1,again,callflags);
end
else
begin
if anon_inherited then
begin
{ For message methods we need to call DefaultHandler }
if (po_msgint in pd.procoptions) or
(po_msgstr in pd.procoptions) then
begin
searchsym_in_class(hclassdef,hclassdef,'DEFAULTHANDLER',srsym,srsymtable,[ssf_search_helper]);
if not assigned(srsym) or
(srsym.typ<>procsym) then
internalerror(200303171);
p1:=nil;
do_proc_call(srsym,srsym.owner,hclassdef,false,again,p1,[]);
end
else
begin
{ we need to ignore the inherited; }
p1:=cnothingnode.create;
end;
end
else
begin
Message1(sym_e_id_no_member,hsorg);
p1:=cerrornode.create;
end;
again:=false;
end;
{ turn auto inheriting off }
anon_inherited:=false;
end
else
begin
{ in case of records we use a more clear error message }
if assigned(current_structdef) and
(current_structdef.typ=recorddef) then
Message(parser_e_inherited_not_in_record)
else
Message(parser_e_generic_methods_only_in_methods);
again:=false;
p1:=cerrornode.create;
end;
postfixoperators(p1,again,getaddr);
end;
_INTCONST :
begin
{Try first wether the value fits in an int64.}
val(pattern,ic,code);
if code=0 then
begin
consume(_INTCONST);
int_to_type(ic,hdef);
p1:=cordconstnode.create(ic,hdef,true);
end
else
begin
{ try qword next }
val(pattern,qc,code);
if code=0 then
begin
consume(_INTCONST);
int_to_type(qc,hdef);
p1:=cordconstnode.create(qc,hdef,true);
end;
end;
if code<>0 then
begin
{ finally float }
val(pattern,d,code);
if code<>0 then
begin
Message(parser_e_invalid_integer);
consume(_INTCONST);
l:=1;
p1:=cordconstnode.create(l,sinttype,true);
end
else
begin
consume(_INTCONST);
p1:=crealconstnode.create(d,pbestrealtype^);
end;
end
else
{ the necessary range checking has already been done by val }
tordconstnode(p1).rangecheck:=false;
if token=_POINT then
begin
again:=true;
postfixoperators(p1,again,getaddr);
end;
end;
_REALNUMBER :
begin
p1:=real_const_node_from_pattern(pattern);
consume(_REALNUMBER);
if token=_POINT then
begin
again:=true;
postfixoperators(p1,again,getaddr);
end;
end;
_STRING :
begin
string_dec(hdef,true);
{ STRING can be also a type cast }
if try_to_consume(_LKLAMMER) then
begin
p1:=comp_expr(true,false);
consume(_RKLAMMER);
p1:=ctypeconvnode.create_explicit(p1,hdef);
{ handle postfix operators here e.g. string(a)[10] }
again:=true;
postfixoperators(p1,again,getaddr);
end
else
p1:=ctypenode.create(hdef);
end;
_FILE :
begin
hdef:=cfiletype;
consume(_FILE);
{ FILE can be also a type cast }
if try_to_consume(_LKLAMMER) then
begin
p1:=comp_expr(true,false);
consume(_RKLAMMER);
p1:=ctypeconvnode.create_explicit(p1,hdef);
{ handle postfix operators here e.g. string(a)[10] }
again:=true;
postfixoperators(p1,again,getaddr);
end
else
begin
p1:=ctypenode.create(hdef);
end;
end;
_CSTRING :
begin
p1:=cstringconstnode.createpchar(ansistring2pchar(cstringpattern),length(cstringpattern),nil);
consume(_CSTRING);
if token in postfixoperator_tokens then
begin
again:=true;
postfixoperators(p1,again,getaddr);
end;
end;
_CCHAR :
begin
p1:=cordconstnode.create(ord(pattern[1]),cansichartype,true);
consume(_CCHAR);
if token=_POINT then
begin
again:=true;
postfixoperators(p1,again,getaddr);
end;
end;
_CWSTRING:
begin
p1:=cstringconstnode.createunistr(patternw);
consume(_CWSTRING);
if token in postfixoperator_tokens then
begin
again:=true;
postfixoperators(p1,again,getaddr);
end;
end;
_CWCHAR:
begin
p1:=cordconstnode.create(ord(getcharwidestring(patternw,0)),cwidechartype,true);
consume(_CWCHAR);
if token=_POINT then
begin
again:=true;
postfixoperators(p1,again,getaddr);
end;
end;
_KLAMMERAFFE :
begin
consume(_KLAMMERAFFE);
got_addrn:=true;
{ support both @<x> and @(<x>) }
if try_to_consume(_LKLAMMER) then
begin
p1:=factor(true,false);
if token in postfixoperator_tokens then
begin
again:=true;
postfixoperators(p1,again,getaddr);
end
else
consume(_RKLAMMER);
end
else
p1:=factor(true,false);
if token in postfixoperator_tokens then
begin
again:=true;
postfixoperators(p1,again,getaddr);
end;
got_addrn:=false;
p1:=caddrnode.create(p1);
p1.fileinfo:=filepos;
if cs_typed_addresses in current_settings.localswitches then
include(p1.flags,nf_typedaddr);
{ Store the procvar that we are expecting, the
addrn will use the information to find the correct
procdef or it will return an error }
if assigned(getprocvardef) and
(taddrnode(p1).left.nodetype = loadn) then
taddrnode(p1).getprocvardef:=getprocvardef;
end;
_LKLAMMER :
begin
consume(_LKLAMMER);
p1:=comp_expr(true,false);
consume(_RKLAMMER);
{ it's not a good solution
but (a+b)^ makes some problems }
if token in postfixoperator_tokens then
begin
again:=true;
postfixoperators(p1,again,getaddr);
end;
end;
_LECKKLAMMER :
begin
consume(_LECKKLAMMER);
p1:=factor_read_set;
consume(_RECKKLAMMER);
end;
_PLUS :
begin
consume(_PLUS);
p1:=factor(false,false);
p1:=cunaryplusnode.create(p1);
end;
_MINUS :
begin
consume(_MINUS);
if (token = _INTCONST) and not(m_isolike_unary_minus in current_settings.modeswitches) then
begin
{ ugly hack, but necessary to be able to parse }
{ -9223372036854775808 as int64 (JM) }
pattern := '-'+pattern;
p1:=sub_expr(oppower,false,false,nil);
{ -1 ** 4 should be - (1 ** 4) and not
(-1) ** 4
This was the reason of tw0869.pp test failure PM }
if p1.nodetype=starstarn then
begin
if tbinarynode(p1).left.nodetype=ordconstn then
begin
tordconstnode(tbinarynode(p1).left).value:=-tordconstnode(tbinarynode(p1).left).value;
p1:=cunaryminusnode.create(p1);
end
else if tbinarynode(p1).left.nodetype=realconstn then
begin
trealconstnode(tbinarynode(p1).left).value_real:=-trealconstnode(tbinarynode(p1).left).value_real;
trealconstnode(tbinarynode(p1).left).value_currency:=-trealconstnode(tbinarynode(p1).left).value_currency;
p1:=cunaryminusnode.create(p1);
end
else
internalerror(20021029);
end;
end
else
begin
if m_isolike_unary_minus in current_settings.modeswitches then
p1:=sub_expr(opmultiply,false,false,nil)
else
p1:=sub_expr(oppower,false,false,nil);
p1:=cunaryminusnode.create(p1);
end;
end;
_OP_NOT :
begin
consume(_OP_NOT);
p1:=factor(false,false);
p1:=cnotnode.create(p1);
end;
_NIL :
begin
consume(_NIL);
p1:=cnilnode.create;
{ It's really ugly code nil^, but delphi allows it }
if token in [_CARET,_POINT] then
begin
again:=true;
postfixoperators(p1,again,getaddr);
end;
end;
_OBJCPROTOCOL:
begin
{ The @protocol keyword is used in two ways in Objective-C:
1) to declare protocols (~ Object Pascal interfaces)
2) to obtain the metaclass (~ Object Pascal) "class of")
of a declared protocol
This code is for handling the second case. Because of 1),
we cannot simply use a system unit symbol.
}
consume(_OBJCPROTOCOL);
consume(_LKLAMMER);
p1:=factor(false,false);
consume(_RKLAMMER);
p1:=cinlinenode.create(in_objc_protocol_x,false,p1);
end;
else
begin
Message(parser_e_illegal_expression);
p1:=cerrornode.create;
{ recover }
consume(token);
end;
end;
end;
{ generate error node if no node is created }
if not assigned(p1) then
begin
{$ifdef EXTDEBUG}
Comment(V_Warning,'factor: p1=nil');
{$endif}
p1:=cerrornode.create;
updatefpos:=true;
end;
{ get the resultdef for the node if nothing stops us }
if (not assigned(p1.resultdef)) and dopostfix then
begin
do_typecheckpass_changed(p1,nodechanged);
updatefpos:=updatefpos or nodechanged;
end;
if assigned(p1) and
updatefpos then
p1.fileinfo:=filepos;
factor:=p1;
end;
{$maxfpuregisters default}
procedure post_comp_expr_gendef(var def: tdef);
var
p1 : tnode;
again : boolean;
begin
if not assigned(def) then
internalerror(2011053001);
again:=false;
{ handle potential typecasts, etc }
p1:=handle_factor_typenode(def,false,again,nil,false);
{ parse postfix operators }
postfixoperators(p1,again,false);
if assigned(p1) and (p1.nodetype=typen) then
def:=ttypenode(p1).typedef
else
def:=generrordef;
end;
{****************************************************************************
Sub_Expr
****************************************************************************}
function sub_expr(pred_level:Toperator_precedence;accept_equal,typeonly:boolean;factornode:tnode):tnode;
{Reads a subexpression while the operators are of the current precedence
level, or any higher level. Replaces the old term, simpl_expr and
simpl2_expr.}
function istypenode(n:tnode):boolean;inline;
{ Checks whether the given node is a type node or a VMT node containing a
typenode. This is used in the code for inline specializations in the
_LT branch below }
begin
result:=assigned(n) and
(
(n.nodetype=typen) or
(
(n.nodetype=loadvmtaddrn) and
(tloadvmtaddrnode(n).left.nodetype=typen)
)
);
end;
function gettypedef(n:tnode):tdef;inline;
{ This returns the typedef that belongs to the given typenode or
loadvmtaddrnode. n must not be Nil! }
begin
if n.nodetype=typen then
result:=ttypenode(n).typedef
else
result:=ttypenode(tloadvmtaddrnode(n).left).typedef;
end;
function getgenericsym(n:tnode;out srsym:tsym):boolean;
var
srsymtable : tsymtable;
begin
srsym:=nil;
case n.nodetype of
typen:
srsym:=ttypenode(n).typedef.typesym;
loadvmtaddrn:
srsym:=ttypenode(tloadvmtaddrnode(n).left).typedef.typesym;
loadn:
if not searchsym_with_symoption(tloadnode(n).symtableentry.Name,srsym,srsymtable,sp_generic_dummy) then
srsym:=nil;
{ TODO : handle const nodes }
end;
result:=assigned(srsym);
end;
label
SubExprStart;
var
p1,p2 : tnode;
oldt : Ttoken;
filepos : tfileposinfo;
again : boolean;
gendef,parseddef : tdef;
gensym : tsym;
begin
SubExprStart:
if pred_level=highest_precedence then
begin
if factornode=nil then
p1:=factor(false,typeonly)
else
p1:=factornode;
end
else
p1:=sub_expr(succ(pred_level),true,typeonly,factornode);
repeat
if (token in [NOTOKEN..last_operator]) and
(token in operator_levels[pred_level]) and
((token<>_EQ) or accept_equal) then
begin
oldt:=token;
filepos:=current_tokenpos;
consume(token);
if pred_level=highest_precedence then
p2:=factor(false,false)
else
p2:=sub_expr(succ(pred_level),true,typeonly,nil);
case oldt of
_PLUS :
p1:=caddnode.create(addn,p1,p2);
_MINUS :
p1:=caddnode.create(subn,p1,p2);
_STAR :
p1:=caddnode.create(muln,p1,p2);
_SLASH :
p1:=caddnode.create(slashn,p1,p2);
_EQ:
p1:=caddnode.create(equaln,p1,p2);
_GT :
p1:=caddnode.create(gtn,p1,p2);
_LT :
begin
{ we need to decice whether we have an inline specialization
(type nodes to the left and right of "<", mode Delphi and
">" or "," following) or a normal "<" comparison }
{ TODO : p1 could be a non type if e.g. a variable with the
same name is defined in the same unit where the
generic is defined (though "same unit" is not
necessarily needed) }
if getgenericsym(p1,gensym) and
{ Attention: when nested specializations are supported
p2 could be a loadn if a "<" follows }
istypenode(p2) and
(m_delphi in current_settings.modeswitches) and
{ TODO : add _LT, _LSHARPBRACKET for nested specializations }
(token in [_GT,_RSHARPBRACKET,_COMMA]) then
begin
{ this is an inline specialization }
{ retrieve the defs of two nodes }
gendef:=nil;
parseddef:=gettypedef(p2);
if parseddef.typesym.typ<>typesym then
Internalerror(2011051001);
{ check the hints for parseddef }
check_hints(parseddef.typesym,parseddef.typesym.symoptions,parseddef.typesym.deprecatedmsg);
{ generate the specialization }
generate_specialization(gendef,false,'',parseddef,gensym.RealName,p2.fileinfo);
{ we don't need the old left and right nodes anymore }
p1.Free;
p2.Free;
{ in case of a class or a record the specialized generic
is always a classrefdef }
again:=false;
{ handle potential typecasts, etc }
p1:=handle_factor_typenode(gendef,false,again,nil,false);
{ parse postfix operators }
if postfixoperators(p1,again,false) then
if assigned(p1) then
p1.fileinfo:=filepos
else
p1:=cerrornode.create;
{ with p1 now set we are in reality directly behind the
call to "factor" thus we need to call down to that
again }
{ This is disabled until specializations on the right
hand side work as well, because
"not working expressions" is better than "half working
expressions" }
{factornode:=p1;
goto SubExprStart;}
end
else
begin
{ this is a normal "<" comparison }
{ potential generic types that are followed by a "<": }
{ a) might not have their resultdef set }
if not assigned(p1.resultdef) then
do_typecheckpass(p1);
{ b) are not checked whether they are an undefined def,
but not a generic parameter }
if (p1.nodetype=typen) and
(ttypenode(p1).typedef.typ=undefineddef) and
assigned(ttypenode(p1).typedef.typesym) and
not (sp_generic_para in ttypenode(p1).typedef.typesym.symoptions) then
begin
identifier_not_found(ttypenode(p1).typedef.typesym.RealName);
p1.Free;
p1:=cerrornode.create;
end;
{ c) don't have their hints checked }
if istypenode(p1) then
begin
gendef:=gettypedef(p1);
if gendef.typ in [objectdef,recorddef,arraydef,procvardef] then
check_hints(gendef.typesym,gendef.typesym.symoptions,gendef.typesym.deprecatedmsg);
end;
{ Note: the second part of the expression will be needed
for nested specializations }
if istypenode(p2) {and
not (token in [_LT, _LSHARPBRACKET])} then
begin
gendef:=gettypedef(p2);
if gendef.typ in [objectdef,recorddef,arraydef,procvardef] then
check_hints(gendef.typesym,gendef.typesym.symoptions,gendef.typesym.deprecatedmsg);
end;
{ create the comparison node for "<" }
p1:=caddnode.create(ltn,p1,p2)
end;
end;
_GTE :
p1:=caddnode.create(gten,p1,p2);
_LTE :
p1:=caddnode.create(lten,p1,p2);
_SYMDIF :
p1:=caddnode.create(symdifn,p1,p2);
_STARSTAR :
p1:=caddnode.create(starstarn,p1,p2);
_OP_AS,
_OP_IS :
begin
if token in [_LT, _LSHARPBRACKET] then
begin
{ for now we're handling this as a generic declaration;
there could be cases though (because of operator
overloading) where this is the wrong decision... }
{ TODO : here the same note as in _LT applies as p2 could
point to a variable, etc }
gendef:=gettypedef(p2);
if gendef.typesym.typ<>typesym then
Internalerror(2011071401);
{ generate the specialization }
generate_specialization(gendef,false,'');
{ we don't need the old p2 anymore }
p2.Free;
again:=false;
{ handle potential typecasts, etc }
p2:=handle_factor_typenode(gendef,false,again,nil,false);
{ parse postfix operators }
if postfixoperators(p2,again,false) then
if assigned(p2) then
p2.fileinfo:=filepos
else
p2:=cerrornode.create;
{ here we don't need to call back down to "factor", thus
no "goto" }
end;
{ now generate the "is" or "as" node }
case oldt of
_OP_AS:
p1:=casnode.create(p1,p2);
_OP_IS:
p1:=cisnode.create(p1,p2);
end;
end;
_OP_IN :
p1:=cinnode.create(p1,p2);
_OP_OR,
_PIPE {macpas only} :
begin
p1:=caddnode.create(orn,p1,p2);
if (oldt = _PIPE) then
include(p1.flags,nf_short_bool);
end;
_OP_AND,
_AMPERSAND {macpas only} :
begin
p1:=caddnode.create(andn,p1,p2);
if (oldt = _AMPERSAND) then
include(p1.flags,nf_short_bool);
end;
_OP_DIV :
p1:=cmoddivnode.create(divn,p1,p2);
_OP_NOT :
p1:=cnotnode.create(p1);
_OP_MOD :
begin
p1:=cmoddivnode.create(modn,p1,p2);
if m_iso in current_settings.modeswitches then
include(p1.flags,nf_isomod);
end;
_OP_SHL :
p1:=cshlshrnode.create(shln,p1,p2);
_OP_SHR :
p1:=cshlshrnode.create(shrn,p1,p2);
_OP_XOR :
p1:=caddnode.create(xorn,p1,p2);
_ASSIGNMENT :
p1:=cassignmentnode.create(p1,p2);
_NE :
p1:=caddnode.create(unequaln,p1,p2);
end;
p1.fileinfo:=filepos;
end
else
break;
until false;
sub_expr:=p1;
end;
function comp_expr(accept_equal,typeonly:boolean):tnode;
var
oldafterassignment : boolean;
p1 : tnode;
begin
oldafterassignment:=afterassignment;
afterassignment:=true;
p1:=sub_expr(opcompare,accept_equal,typeonly,nil);
{ get the resultdef for this expression }
if not assigned(p1.resultdef) then
do_typecheckpass(p1);
afterassignment:=oldafterassignment;
comp_expr:=p1;
end;
function expr(dotypecheck : boolean) : tnode;
var
p1,p2 : tnode;
filepos : tfileposinfo;
oldafterassignment,
updatefpos : boolean;
begin
oldafterassignment:=afterassignment;
p1:=sub_expr(opcompare,true,false,nil);
{ get the resultdef for this expression }
if not assigned(p1.resultdef) and
dotypecheck then
do_typecheckpass(p1);
filepos:=current_tokenpos;
if token in [_ASSIGNMENT,_PLUSASN,_MINUSASN,_STARASN,_SLASHASN] then
afterassignment:=true;
updatefpos:=true;
case token of
_POINTPOINT :
begin
consume(_POINTPOINT);
p2:=sub_expr(opcompare,true,false,nil);
p1:=crangenode.create(p1,p2);
end;
_ASSIGNMENT :
begin
consume(_ASSIGNMENT);
if assigned(p1.resultdef) and (p1.resultdef.typ=procvardef) then
getprocvardef:=tprocvardef(p1.resultdef);
p2:=sub_expr(opcompare,true,false,nil);
if assigned(getprocvardef) then
handle_procvar(getprocvardef,p2);
getprocvardef:=nil;
p1:=cassignmentnode.create(p1,p2);
end;
_PLUSASN :
begin
consume(_PLUSASN);
p2:=sub_expr(opcompare,true,false,nil);
p1:=gen_c_style_operator(addn,p1,p2);
end;
_MINUSASN :
begin
consume(_MINUSASN);
p2:=sub_expr(opcompare,true,false,nil);
p1:=gen_c_style_operator(subn,p1,p2);
end;
_STARASN :
begin
consume(_STARASN );
p2:=sub_expr(opcompare,true,false,nil);
p1:=gen_c_style_operator(muln,p1,p2);
end;
_SLASHASN :
begin
consume(_SLASHASN );
p2:=sub_expr(opcompare,true,false,nil);
p1:=gen_c_style_operator(slashn,p1,p2);
end;
else
updatefpos:=false;
end;
{ get the resultdef for this expression }
if not assigned(p1.resultdef) and
dotypecheck then
do_typecheckpass(p1);
afterassignment:=oldafterassignment;
if updatefpos then
p1.fileinfo:=filepos;
expr:=p1;
end;
function get_intconst:TConstExprInt;
{Reads an expression, tries to evalute it and check if it is an integer
constant. Then the constant is returned.}
var
p:tnode;
begin
result:=0;
p:=comp_expr(true,false);
if not codegenerror then
begin
if (p.nodetype<>ordconstn) or
not(is_integer(p.resultdef)) then
Message(parser_e_illegal_expression)
else
result:=tordconstnode(p).value;
end;
p.free;
end;
function get_stringconst:string;
{Reads an expression, tries to evaluate it and checks if it is a string
constant. Then the constant is returned.}
var
p:tnode;
begin
get_stringconst:='';
p:=comp_expr(true,false);
if p.nodetype<>stringconstn then
begin
if (p.nodetype=ordconstn) and is_char(p.resultdef) then
get_stringconst:=char(int64(tordconstnode(p).value))
else
Message(parser_e_illegal_expression);
end
else
get_stringconst:=strpas(tstringconstnode(p).value_str);
p.free;
end;
end.
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