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1406 lines
48 KiB
ObjectPascal
1406 lines
48 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998 by Florian Klaempfl
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Does the parsing of the statements
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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 pstatmnt;
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interface
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uses tree;
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{ reads a block }
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function block(islibrary : boolean) : ptree;
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{ reads an assembler block }
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function assembler_block : ptree;
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implementation
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uses
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globtype,systems,tokens,
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strings,cobjects,globals,files,verbose,
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symconst,symtable,aasm,pass_1,types,scanner,
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{$ifdef newcg}
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cgbase,
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{$else}
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hcodegen,
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{$endif}
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ppu
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,pbase,pexpr,pdecl,cpubase,cpuasm
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{$ifdef i386}
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,tgeni386
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{$ifndef NoRa386Int}
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,ra386int
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{$endif NoRa386Int}
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{$ifndef NoRa386Att}
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,ra386att
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{$endif NoRa386Att}
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{$ifndef NoRa386Dir}
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,ra386dir
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{$endif NoRa386Dir}
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{$endif i386}
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{$ifdef m68k}
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,tgen68k
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{$ifndef NoRa68kMot}
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,ra68kmot
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{$endif NoRa68kMot}
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{$endif m68k}
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{$ifdef alpha}
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,tgeni386 { this is a dummy!! }
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{$endif alpha}
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{$ifdef powerpc}
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,tgeni386 { this is a dummy!! }
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{$endif powerpc}
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;
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const
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statement_level : longint = 0;
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function statement : ptree;forward;
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function if_statement : ptree;
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var
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ex,if_a,else_a : ptree;
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begin
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consume(_IF);
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ex:=comp_expr(true);
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consume(_THEN);
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if token<>_ELSE then
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if_a:=statement
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else
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if_a:=nil;
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if try_to_consume(_ELSE) then
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else_a:=statement
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else
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else_a:=nil;
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if_statement:=genloopnode(ifn,ex,if_a,else_a,false);
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end;
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{ creates a block (list) of statements, til the next END token }
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function statements_til_end : ptree;
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var
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first,last : ptree;
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begin
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first:=nil;
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while token<>_END do
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begin
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if first=nil then
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begin
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last:=gennode(statementn,nil,statement);
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first:=last;
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end
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else
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begin
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last^.left:=gennode(statementn,nil,statement);
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last:=last^.left;
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end;
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if not try_to_consume(_SEMICOLON) then
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break;
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emptystats;
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end;
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consume(_END);
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statements_til_end:=gensinglenode(blockn,first);
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end;
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function case_statement : ptree;
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var
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{ contains the label number of currently parsed case block }
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aktcaselabel : pasmlabel;
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firstlabel : boolean;
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root : pcaserecord;
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{ the typ of the case expression }
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casedef : pdef;
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procedure newcaselabel(l,h : longint;first:boolean);
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var
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hcaselabel : pcaserecord;
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procedure insertlabel(var p : pcaserecord);
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begin
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if p=nil then p:=hcaselabel
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else
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if (p^._low>hcaselabel^._low) and
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(p^._low>hcaselabel^._high) then
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if (hcaselabel^.statement = p^.statement) and
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(p^._low = hcaselabel^._high + 1) then
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begin
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p^._low := hcaselabel^._low;
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freelabel(hcaselabel^._at);
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dispose(hcaselabel);
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end
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else
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insertlabel(p^.less)
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else
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if (p^._high<hcaselabel^._low) and
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(p^._high<hcaselabel^._high) then
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if (hcaselabel^.statement = p^.statement) and
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(p^._high+1 = hcaselabel^._low) then
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begin
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p^._high := hcaselabel^._high;
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freelabel(hcaselabel^._at);
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dispose(hcaselabel);
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end
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else
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insertlabel(p^.greater)
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else Message(parser_e_double_caselabel);
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end;
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begin
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new(hcaselabel);
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hcaselabel^.less:=nil;
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hcaselabel^.greater:=nil;
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hcaselabel^.statement:=aktcaselabel;
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hcaselabel^.firstlabel:=first;
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getlabel(hcaselabel^._at);
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hcaselabel^._low:=l;
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hcaselabel^._high:=h;
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insertlabel(root);
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end;
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var
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code,caseexpr,p,instruc,elseblock : ptree;
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hl1,hl2 : longint;
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casedeferror : boolean;
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begin
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consume(_CASE);
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caseexpr:=comp_expr(true);
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{ determines result type }
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cleartempgen;
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do_firstpass(caseexpr);
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casedeferror:=false;
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casedef:=caseexpr^.resulttype;
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if not(is_ordinal(casedef) or is_64bitint(casedef)) then
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begin
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Message(type_e_ordinal_expr_expected);
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{ set error flag so no rangechecks are done }
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casedeferror:=true;
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end;
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consume(_OF);
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inc(statement_level);
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root:=nil;
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instruc:=nil;
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repeat
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getlabel(aktcaselabel);
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firstlabel:=true;
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{ may be an instruction has more case labels }
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repeat
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p:=expr;
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cleartempgen;
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do_firstpass(p);
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hl1:=0;
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hl2:=0;
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if (p^.treetype=rangen) then
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begin
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{ type checking for case statements }
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if is_subequal(casedef, p^.left^.resulttype) and
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is_subequal(casedef, p^.right^.resulttype) then
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begin
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hl1:=get_ordinal_value(p^.left);
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hl2:=get_ordinal_value(p^.right);
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if hl1>hl2 then
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Message(parser_e_case_lower_less_than_upper_bound);
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if not casedeferror then
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begin
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testrange(casedef,hl1);
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testrange(casedef,hl2);
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end;
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end
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else
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Message(parser_e_case_mismatch);
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newcaselabel(hl1,hl2,firstlabel);
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end
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else
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begin
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{ type checking for case statements }
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if not is_subequal(casedef, p^.resulttype) then
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Message(parser_e_case_mismatch);
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hl1:=get_ordinal_value(p);
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if not casedeferror then
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testrange(casedef,hl1);
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newcaselabel(hl1,hl1,firstlabel);
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end;
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disposetree(p);
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if token=_COMMA then
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consume(_COMMA)
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else
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break;
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firstlabel:=false;
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until false;
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consume(_COLON);
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{ handles instruction block }
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p:=gensinglenode(labeln,statement);
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p^.labelnr:=aktcaselabel;
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{ concats instruction }
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instruc:=gennode(statementn,instruc,p);
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if not((token=_ELSE) or (token=_OTHERWISE) or (token=_END)) then
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consume(_SEMICOLON);
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until (token=_ELSE) or (token=_OTHERWISE) or (token=_END);
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if (token=_ELSE) or (token=_OTHERWISE) then
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begin
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if not try_to_consume(_ELSE) then
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consume(_OTHERWISE);
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elseblock:=statements_til_end;
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end
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else
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begin
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elseblock:=nil;
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consume(_END);
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end;
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dec(statement_level);
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code:=gencasenode(caseexpr,instruc,root);
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code^.elseblock:=elseblock;
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case_statement:=code;
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end;
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function repeat_statement : ptree;
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var
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first,last,p_e : ptree;
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begin
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consume(_REPEAT);
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first:=nil;
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inc(statement_level);
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while token<>_UNTIL do
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begin
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if first=nil then
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begin
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last:=gennode(statementn,nil,statement);
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first:=last;
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end
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else
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begin
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last^.left:=gennode(statementn,nil,statement);
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last:=last^.left;
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end;
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if not try_to_consume(_SEMICOLON) then
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break;
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emptystats;
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end;
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consume(_UNTIL);
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dec(statement_level);
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first:=gensinglenode(blockn,first);
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p_e:=comp_expr(true);
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repeat_statement:=genloopnode(repeatn,p_e,first,nil,false);
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end;
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function while_statement : ptree;
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var
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p_e,p_a : ptree;
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begin
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consume(_WHILE);
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p_e:=comp_expr(true);
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consume(_DO);
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p_a:=statement;
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while_statement:=genloopnode(whilen,p_e,p_a,nil,false);
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end;
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function for_statement : ptree;
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var
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p_e,tovalue,p_a : ptree;
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backward : boolean;
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begin
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{ parse loop header }
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consume(_FOR);
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p_e:=expr;
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if token=_DOWNTO then
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begin
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consume(_DOWNTO);
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backward:=true;
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end
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else
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begin
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consume(_TO);
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backward:=false;
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end;
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tovalue:=comp_expr(true);
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consume(_DO);
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{ ... now the instruction }
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p_a:=statement;
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for_statement:=genloopnode(forn,p_e,tovalue,p_a,backward);
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end;
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function _with_statement : ptree;
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var
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right,hp,p : ptree;
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i,levelcount : longint;
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withsymtable,symtab : psymtable;
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obj : pobjectdef;
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begin
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Must_be_valid:=false;
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p:=comp_expr(true);
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do_firstpass(p);
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right:=nil;
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if (not codegenerror) and
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(p^.resulttype^.deftype in [objectdef,recorddef]) then
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begin
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case p^.resulttype^.deftype of
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objectdef : begin
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obj:=pobjectdef(p^.resulttype);
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withsymtable:=new(pwithsymtable,init);
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withsymtable^.symsearch:=obj^.symtable^.symsearch;
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withsymtable^.defowner:=obj;
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symtab:=withsymtable;
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if (p^.treetype=loadn) and
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(p^.symtable=aktprocsym^.definition^.localst) then
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pwithsymtable(symtab)^.direct_with:=true;
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{symtab^.withnode:=p; not yet allocated !! }
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pwithsymtable(symtab)^.withrefnode:=p;
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levelcount:=1;
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obj:=obj^.childof;
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while assigned(obj) do
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begin
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symtab^.next:=new(pwithsymtable,init);
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symtab:=symtab^.next;
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symtab^.symsearch:=obj^.symtable^.symsearch;
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if (p^.treetype=loadn) and
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(p^.symtable=aktprocsym^.definition^.localst) then
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pwithsymtable(symtab)^.direct_with:=true;
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{symtab^.withnode:=p; not yet allocated !! }
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pwithsymtable(symtab)^.withrefnode:=p;
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symtab^.defowner:=obj;
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obj:=obj^.childof;
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inc(levelcount);
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end;
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symtab^.next:=symtablestack;
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symtablestack:=withsymtable;
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end;
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recorddef : begin
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symtab:=precorddef(p^.resulttype)^.symtable;
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levelcount:=1;
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withsymtable:=new(pwithsymtable,init);
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withsymtable^.symsearch:=symtab^.symsearch;
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withsymtable^.next:=symtablestack;
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if (p^.treetype=loadn) and
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(p^.symtable=aktprocsym^.definition^.localst) then
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pwithsymtable(withsymtable)^.direct_with:=true;
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{symtab^.withnode:=p; not yet allocated !! }
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pwithsymtable(withsymtable)^.withrefnode:=p;
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withsymtable^.defowner:=obj;
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symtablestack:=withsymtable;
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end;
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end;
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if token=_COMMA then
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begin
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consume(_COMMA);
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{$ifdef tp}
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right:=_with_statement;
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{$else}
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right:=_with_statement();
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{$endif}
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end
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else
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begin
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consume(_DO);
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if token<>_SEMICOLON then
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right:=statement
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else
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right:=nil;
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end;
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for i:=1 to levelcount do
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symtablestack:=symtablestack^.next;
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_with_statement:=genwithnode(pwithsymtable(withsymtable),p,right,levelcount);
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end
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else
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begin
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Message(parser_e_false_with_expr);
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{ try to recover from error }
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if token=_COMMA then
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begin
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consume(_COMMA);
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{$ifdef tp}
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hp:=_with_statement;
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{$else}
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hp:=_with_statement();
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{$endif}
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end
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else
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begin
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consume(_DO);
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{ ignore all }
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if token<>_SEMICOLON then
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statement;
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end;
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_with_statement:=nil;
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end;
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end;
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function with_statement : ptree;
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begin
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consume(_WITH);
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with_statement:=_with_statement;
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end;
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function raise_statement : ptree;
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var
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p1,p2 : ptree;
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begin
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p1:=nil;
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p2:=nil;
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consume(_RAISE);
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if token<>_SEMICOLON then
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begin
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p1:=comp_expr(true);
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if (idtoken=_AT) then
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begin
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consume(_ID);
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p2:=comp_expr(true);
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end;
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end
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else
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begin
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if (block_type<>bt_except) then
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Message(parser_e_no_reraise_possible);
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end;
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raise_statement:=gennode(raisen,p1,p2);
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end;
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function try_statement : ptree;
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var
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p_try_block,p_finally_block,first,last,
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p_default,p_specific,hp : ptree;
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ot : pobjectdef;
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sym : pvarsym;
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old_block_type : tblock_type;
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exceptsymtable : psymtable;
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objname : stringid;
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begin
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procinfo^.flags:=procinfo^.flags or
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pi_uses_exceptions;
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p_default:=nil;
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p_specific:=nil;
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{ read statements to try }
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consume(_TRY);
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first:=nil;
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inc(statement_level);
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while (token<>_FINALLY) and (token<>_EXCEPT) do
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begin
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if first=nil then
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begin
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last:=gennode(statementn,nil,statement);
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first:=last;
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end
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else
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begin
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last^.left:=gennode(statementn,nil,statement);
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last:=last^.left;
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end;
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if not try_to_consume(_SEMICOLON) then
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break;
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emptystats;
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end;
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p_try_block:=gensinglenode(blockn,first);
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|
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if try_to_consume(_FINALLY) then
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begin
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p_finally_block:=statements_til_end;
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try_statement:=gennode(tryfinallyn,p_try_block,p_finally_block);
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dec(statement_level);
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end
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else
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begin
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consume(_EXCEPT);
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old_block_type:=block_type;
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block_type:=bt_except;
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p_specific:=nil;
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if token=_ON then
|
|
{ catch specific exceptions }
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begin
|
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repeat
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consume(_ON);
|
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if token=_ID then
|
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begin
|
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getsym(pattern,false);
|
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objname:=pattern;
|
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consume(_ID);
|
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{ is a explicit name for the exception given ? }
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|
if try_to_consume(_COLON) then
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begin
|
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getsym(pattern,true);
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consume(_ID);
|
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if srsym^.typ=unitsym then
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begin
|
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consume(_POINT);
|
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getsymonlyin(punitsym(srsym)^.unitsymtable,pattern);
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|
consume(_ID);
|
|
end;
|
|
if (srsym^.typ=typesym) and
|
|
(ptypesym(srsym)^.definition^.deftype=objectdef) and
|
|
pobjectdef(ptypesym(srsym)^.definition)^.is_class then
|
|
ot:=pobjectdef(ptypesym(srsym)^.definition)
|
|
else
|
|
begin
|
|
ot:=pobjectdef(generrordef);
|
|
if (srsym^.typ=typesym) then
|
|
Message1(type_e_class_type_expected,ptypesym(srsym)^.definition^.typename)
|
|
else
|
|
Message1(type_e_class_type_expected,ot^.typename);
|
|
end;
|
|
sym:=new(pvarsym,init(objname,ot));
|
|
exceptsymtable:=new(psymtable,init(stt_exceptsymtable));
|
|
exceptsymtable^.insert(sym);
|
|
{ insert the exception symtable stack }
|
|
exceptsymtable^.next:=symtablestack;
|
|
symtablestack:=exceptsymtable;
|
|
end
|
|
else
|
|
begin
|
|
{ only exception type }
|
|
if srsym^.typ=unitsym then
|
|
begin
|
|
consume(_POINT);
|
|
getsymonlyin(punitsym(srsym)^.unitsymtable,pattern);
|
|
consume(_ID);
|
|
end;
|
|
if (srsym^.typ=typesym) and
|
|
(ptypesym(srsym)^.definition^.deftype=objectdef) and
|
|
pobjectdef(ptypesym(srsym)^.definition)^.is_class then
|
|
ot:=pobjectdef(ptypesym(srsym)^.definition)
|
|
else
|
|
begin
|
|
ot:=pobjectdef(generrordef);
|
|
if (srsym^.typ=typesym) then
|
|
Message1(type_e_class_type_expected,ptypesym(srsym)^.definition^.typename)
|
|
else
|
|
Message1(type_e_class_type_expected,ot^.typename);
|
|
end;
|
|
exceptsymtable:=nil;
|
|
end;
|
|
end
|
|
else
|
|
consume(_ID);
|
|
consume(_DO);
|
|
hp:=gennode(onn,nil,statement);
|
|
if ot^.deftype=errordef then
|
|
begin
|
|
disposetree(hp);
|
|
hp:=genzeronode(errorn);
|
|
end;
|
|
if p_specific=nil then
|
|
begin
|
|
last:=hp;
|
|
p_specific:=last;
|
|
end
|
|
else
|
|
begin
|
|
last^.left:=hp;
|
|
last:=last^.left;
|
|
end;
|
|
{ set the informations }
|
|
last^.excepttype:=ot;
|
|
last^.exceptsymtable:=exceptsymtable;
|
|
last^.disposetyp:=dt_onn;
|
|
{ remove exception symtable }
|
|
if assigned(exceptsymtable) then
|
|
dellexlevel;
|
|
if not try_to_consume(_SEMICOLON) then
|
|
break;
|
|
emptystats;
|
|
until (token=_END) or(token=_ELSE);
|
|
if token=_ELSE then
|
|
{ catch the other exceptions }
|
|
begin
|
|
consume(_ELSE);
|
|
p_default:=statements_til_end;
|
|
end
|
|
else
|
|
consume(_END);
|
|
end
|
|
else
|
|
{ catch all exceptions }
|
|
begin
|
|
p_default:=statements_til_end;
|
|
end;
|
|
dec(statement_level);
|
|
|
|
block_type:=old_block_type;
|
|
try_statement:=genloopnode(tryexceptn,p_try_block,p_specific,p_default,false);
|
|
end;
|
|
end;
|
|
|
|
|
|
function exit_statement : ptree;
|
|
|
|
var
|
|
p : ptree;
|
|
|
|
begin
|
|
consume(_EXIT);
|
|
if try_to_consume(_LKLAMMER) then
|
|
begin
|
|
p:=comp_expr(true);
|
|
consume(_RKLAMMER);
|
|
if (block_type=bt_except) then
|
|
Message(parser_e_exit_with_argument_not__possible);
|
|
if procinfo^.retdef=pdef(voiddef) then
|
|
Message(parser_e_void_function);
|
|
{
|
|
else
|
|
procinfo^.funcret_is_valid:=true;
|
|
}
|
|
end
|
|
else
|
|
p:=nil;
|
|
p:=gensinglenode(exitn,p);
|
|
p^.resulttype:=procinfo^.retdef;
|
|
exit_statement:=p;
|
|
end;
|
|
|
|
|
|
function _asm_statement : ptree;
|
|
var
|
|
asmstat : ptree;
|
|
Marker : Pai;
|
|
begin
|
|
Inside_asm_statement:=true;
|
|
case aktasmmode of
|
|
asmmode_none : ; { just be there to allow to a compile without
|
|
any assembler readers }
|
|
{$ifdef i386}
|
|
{$ifndef NoRA386Att}
|
|
asmmode_i386_att:
|
|
asmstat:=ra386att.assemble;
|
|
{$endif NoRA386Att}
|
|
{$ifndef NoRA386Int}
|
|
asmmode_i386_intel:
|
|
asmstat:=ra386int.assemble;
|
|
{$endif NoRA386Int}
|
|
{$ifndef NoRA386Dir}
|
|
asmmode_i386_direct:
|
|
begin
|
|
if not target_asm.allowdirect then
|
|
Message(parser_f_direct_assembler_not_allowed);
|
|
if (pocall_inline in aktprocsym^.definition^.proccalloptions) then
|
|
Begin
|
|
Message1(parser_w_not_supported_for_inline,'direct asm');
|
|
Message(parser_w_inlining_disabled);
|
|
{$ifdef INCLUDEOK}
|
|
exclude(aktprocsym^.definition^.proccalloptions,pocall_inline);
|
|
{$else}
|
|
aktprocsym^.definition^.proccalloptions:=aktprocsym^.definition^.proccalloptions-[pocall_inline];
|
|
{$endif}
|
|
End;
|
|
asmstat:=ra386dir.assemble;
|
|
end;
|
|
{$endif NoRA386Dir}
|
|
{$endif}
|
|
{$ifdef m68k}
|
|
{$ifndef NoRA68kMot}
|
|
asmmode_m68k_mot:
|
|
asmstat:=ra68kmot.assemble;
|
|
{$endif NoRA68kMot}
|
|
{$endif}
|
|
else
|
|
Message(parser_f_assembler_reader_not_supported);
|
|
end;
|
|
|
|
{ Read first the _ASM statement }
|
|
consume(_ASM);
|
|
|
|
{$ifndef newcg}
|
|
{ END is read }
|
|
if try_to_consume(_LECKKLAMMER) then
|
|
begin
|
|
{ it's possible to specify the modified registers }
|
|
asmstat^.object_preserved:=true;
|
|
if token<>_RECKKLAMMER then
|
|
repeat
|
|
{ uppercase, because it's a CSTRING }
|
|
uppervar(pattern);
|
|
{$ifdef i386}
|
|
if pattern='EAX' then
|
|
usedinproc:=usedinproc or ($80 shr byte(R_EAX))
|
|
else if pattern='EBX' then
|
|
usedinproc:=usedinproc or ($80 shr byte(R_EBX))
|
|
else if pattern='ECX' then
|
|
usedinproc:=usedinproc or ($80 shr byte(R_ECX))
|
|
else if pattern='EDX' then
|
|
usedinproc:=usedinproc or ($80 shr byte(R_EDX))
|
|
else if pattern='ESI' then
|
|
begin
|
|
usedinproc:=usedinproc or ($80 shr byte(R_ESI));
|
|
asmstat^.object_preserved:=false;
|
|
end
|
|
else if pattern='EDI' then
|
|
usedinproc:=usedinproc or ($80 shr byte(R_EDI))
|
|
{$endif i386}
|
|
{$ifdef m68k}
|
|
if pattern='D0' then
|
|
usedinproc:=usedinproc or ($800 shr word(R_D0))
|
|
else if pattern='D1' then
|
|
usedinproc:=usedinproc or ($800 shr word(R_D1))
|
|
else if pattern='D6' then
|
|
usedinproc:=usedinproc or ($800 shr word(R_D6))
|
|
else if pattern='A0' then
|
|
usedinproc:=usedinproc or ($800 shr word(R_A0))
|
|
else if pattern='A1' then
|
|
usedinproc:=usedinproc or ($800 shr word(R_A1))
|
|
{$endif m68k}
|
|
else consume(_RECKKLAMMER);
|
|
consume(_CSTRING);
|
|
if not try_to_consume(_COMMA) then
|
|
break;
|
|
until false;
|
|
consume(_RECKKLAMMER);
|
|
end
|
|
else usedinproc:=$ff;
|
|
{$endif newcg}
|
|
|
|
{ mark the start and the end of the assembler block for the optimizer }
|
|
|
|
If Assigned(AsmStat^.p_asm) Then
|
|
Begin
|
|
Marker := New(Pai_Marker, Init(AsmBlockStart));
|
|
AsmStat^.p_asm^.Insert(Marker);
|
|
Marker := New(Pai_Marker, Init(AsmBlockEnd));
|
|
AsmStat^.p_asm^.Concat(Marker);
|
|
End;
|
|
Inside_asm_statement:=false;
|
|
|
|
_asm_statement:=asmstat;
|
|
end;
|
|
|
|
|
|
function new_dispose_statement : ptree;
|
|
var
|
|
p,p2 : ptree;
|
|
ht : ttoken;
|
|
again : boolean; { dummy for do_proc_call }
|
|
destrukname : stringid;
|
|
sym : psym;
|
|
classh : pobjectdef;
|
|
pd,pd2 : pdef;
|
|
store_valid : boolean;
|
|
tt : ttreetyp;
|
|
begin
|
|
ht:=token;
|
|
if try_to_consume(_NEW) then
|
|
tt:=hnewn
|
|
else
|
|
begin
|
|
consume(_DISPOSE);
|
|
tt:=hdisposen;
|
|
end;
|
|
consume(_LKLAMMER);
|
|
|
|
{ displaced here to avoid warnings in BP mode (PM) }
|
|
Store_valid := Must_be_valid;
|
|
if tt=hnewn then
|
|
Must_be_valid := False
|
|
else
|
|
Must_be_valid:=true;
|
|
|
|
p:=comp_expr(true);
|
|
|
|
{ calc return type }
|
|
cleartempgen;
|
|
do_firstpass(p);
|
|
Must_be_valid := Store_valid;
|
|
|
|
{var o:Pobject;
|
|
begin
|
|
new(o,init); (*Also a valid new statement*)
|
|
end;}
|
|
|
|
if try_to_consume(_COMMA) then
|
|
begin
|
|
{ extended syntax of new and dispose }
|
|
{ function styled new is handled in factor }
|
|
{ destructors have no parameters }
|
|
destrukname:=pattern;
|
|
consume(_ID);
|
|
|
|
pd:=p^.resulttype;
|
|
if pd=nil then
|
|
pd:=generrordef;
|
|
pd2:=pd;
|
|
if (pd^.deftype<>pointerdef) then
|
|
begin
|
|
Message1(type_e_pointer_type_expected,pd^.typename);
|
|
p:=factor(false);
|
|
consume(_RKLAMMER);
|
|
new_dispose_statement:=genzeronode(errorn);
|
|
exit;
|
|
end;
|
|
{ first parameter must be an object or class }
|
|
if ppointerdef(pd)^.definition^.deftype<>objectdef then
|
|
begin
|
|
Message(parser_e_pointer_to_class_expected);
|
|
new_dispose_statement:=factor(false);
|
|
consume_all_until(_RKLAMMER);
|
|
consume(_RKLAMMER);
|
|
exit;
|
|
end;
|
|
{ check, if the first parameter is a pointer to a _class_ }
|
|
classh:=pobjectdef(ppointerdef(pd)^.definition);
|
|
if classh^.is_class then
|
|
begin
|
|
Message(parser_e_no_new_or_dispose_for_classes);
|
|
new_dispose_statement:=factor(false);
|
|
consume_all_until(_RKLAMMER);
|
|
consume(_RKLAMMER);
|
|
exit;
|
|
end;
|
|
{ search cons-/destructor, also in parent classes }
|
|
sym:=search_class_member(classh,pattern);
|
|
{ the second parameter of new/dispose must be a call }
|
|
{ to a cons-/destructor }
|
|
if (not assigned(sym)) or (sym^.typ<>procsym) then
|
|
begin
|
|
Message(parser_e_expr_have_to_be_destructor_call);
|
|
new_dispose_statement:=genzeronode(errorn);
|
|
end
|
|
else
|
|
begin
|
|
p2:=gensinglenode(tt,p);
|
|
if ht=_NEW then
|
|
begin
|
|
{ Constructors can take parameters.}
|
|
p2^.resulttype:=ppointerdef(pd)^.definition;
|
|
do_member_read(false,sym,p2,pd,again);
|
|
end
|
|
else
|
|
{ destructors can't.}
|
|
p2:=genmethodcallnode(pprocsym(sym),srsymtable,p2);
|
|
|
|
{ we need the real called method }
|
|
cleartempgen;
|
|
do_firstpass(p2);
|
|
|
|
if not codegenerror then
|
|
begin
|
|
if (ht=_NEW) and (p2^.procdefinition^.proctypeoption<>potype_constructor) then
|
|
Message(parser_e_expr_have_to_be_constructor_call);
|
|
if (ht=_DISPOSE) and (p2^.procdefinition^.proctypeoption<>potype_destructor) then
|
|
Message(parser_e_expr_have_to_be_destructor_call);
|
|
|
|
if ht=_NEW then
|
|
begin
|
|
p2:=gennode(assignn,getcopy(p),gensinglenode(newn,p2));
|
|
p2^.right^.resulttype:=pd2;
|
|
end;
|
|
end;
|
|
new_dispose_statement:=p2;
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
if p^.resulttype=nil then
|
|
p^.resulttype:=generrordef;
|
|
if (p^.resulttype^.deftype<>pointerdef) then
|
|
Begin
|
|
Message1(type_e_pointer_type_expected,p^.resulttype^.typename);
|
|
new_dispose_statement:=genzeronode(errorn);
|
|
end
|
|
else
|
|
begin
|
|
if (ppointerdef(p^.resulttype)^.definition^.deftype=objectdef) and
|
|
(oo_has_vmt in pobjectdef(ppointerdef(p^.resulttype)^.definition)^.objectoptions) then
|
|
Message(parser_w_use_extended_syntax_for_objects);
|
|
if (ppointerdef(p^.resulttype)^.definition^.deftype=orddef) and
|
|
(porddef(ppointerdef(p^.resulttype)^.definition)^.typ=uvoid) then
|
|
if (m_tp in aktmodeswitches) or
|
|
(m_delphi in aktmodeswitches) then
|
|
Message(parser_w_no_new_dispose_on_void_pointers)
|
|
else
|
|
Message(parser_e_no_new_dispose_on_void_pointers);
|
|
|
|
case ht of
|
|
_NEW : new_dispose_statement:=gensinglenode(simplenewn,p);
|
|
_DISPOSE : new_dispose_statement:=gensinglenode(simpledisposen,p);
|
|
end;
|
|
end;
|
|
end;
|
|
consume(_RKLAMMER);
|
|
end;
|
|
|
|
|
|
function statement_block(starttoken : ttoken) : ptree;
|
|
|
|
var
|
|
first,last : ptree;
|
|
filepos : tfileposinfo;
|
|
|
|
begin
|
|
first:=nil;
|
|
filepos:=tokenpos;
|
|
consume(starttoken);
|
|
inc(statement_level);
|
|
|
|
while not(token in [_END,_FINALIZATION]) do
|
|
begin
|
|
if first=nil then
|
|
begin
|
|
last:=gennode(statementn,nil,statement);
|
|
first:=last;
|
|
end
|
|
else
|
|
begin
|
|
last^.left:=gennode(statementn,nil,statement);
|
|
last:=last^.left;
|
|
end;
|
|
if (token in [_END,_FINALIZATION]) then
|
|
break
|
|
else
|
|
begin
|
|
{ if no semicolon, then error and go on }
|
|
if token<>_SEMICOLON then
|
|
begin
|
|
consume(_SEMICOLON);
|
|
consume_all_until(_SEMICOLON);
|
|
end;
|
|
consume(_SEMICOLON);
|
|
end;
|
|
emptystats;
|
|
end;
|
|
|
|
{ don't consume the finalization token, it is consumed when
|
|
reading the finalization block, but allow it only after
|
|
an initalization ! }
|
|
if (starttoken<>_INITIALIZATION) or (token<>_FINALIZATION) then
|
|
consume(_END);
|
|
|
|
dec(statement_level);
|
|
|
|
last:=gensinglenode(blockn,first);
|
|
set_tree_filepos(last,filepos);
|
|
statement_block:=last;
|
|
end;
|
|
|
|
|
|
function statement : ptree;
|
|
|
|
var
|
|
p : ptree;
|
|
code : ptree;
|
|
labelnr : pasmlabel;
|
|
filepos : tfileposinfo;
|
|
|
|
label
|
|
ready;
|
|
|
|
begin
|
|
filepos:=tokenpos;
|
|
case token of
|
|
_GOTO : begin
|
|
if not(cs_support_goto in aktmoduleswitches)then
|
|
Message(sym_e_goto_and_label_not_supported);
|
|
consume(_GOTO);
|
|
if (token<>_INTCONST) and (token<>_ID) then
|
|
begin
|
|
Message(sym_e_label_not_found);
|
|
code:=genzeronode(errorn);
|
|
end
|
|
else
|
|
begin
|
|
getsym(pattern,true);
|
|
consume(token);
|
|
if srsym^.typ<>labelsym then
|
|
begin
|
|
Message(sym_e_id_is_no_label_id);
|
|
code:=genzeronode(errorn);
|
|
end
|
|
else
|
|
code:=genlabelnode(goton,
|
|
plabelsym(srsym)^.lab);
|
|
end;
|
|
end;
|
|
_BEGIN : code:=statement_block(_BEGIN);
|
|
_IF : code:=if_statement;
|
|
_CASE : code:=case_statement;
|
|
_REPEAT : code:=repeat_statement;
|
|
_WHILE : code:=while_statement;
|
|
_FOR : code:=for_statement;
|
|
_NEW,_DISPOSE : code:=new_dispose_statement;
|
|
|
|
_WITH : code:=with_statement;
|
|
_TRY : code:=try_statement;
|
|
_RAISE : code:=raise_statement;
|
|
{ semicolons,else until and end are ignored }
|
|
_SEMICOLON,
|
|
_ELSE,
|
|
_UNTIL,
|
|
_END:
|
|
code:=genzeronode(niln);
|
|
_FAIL : begin
|
|
{ internalerror(100); }
|
|
if (aktprocsym^.definition^.proctypeoption<>potype_constructor) then
|
|
Message(parser_e_fail_only_in_constructor);
|
|
consume(_FAIL);
|
|
code:=genzeronode(failn);
|
|
end;
|
|
_EXIT : code:=exit_statement;
|
|
_ASM : begin
|
|
code:=_asm_statement;
|
|
end;
|
|
_EOF : begin
|
|
Message(scan_f_end_of_file);
|
|
end;
|
|
else
|
|
begin
|
|
if (token in [_INTCONST,_ID]) then
|
|
begin
|
|
getsym(pattern,true);
|
|
lastsymknown:=true;
|
|
lastsrsym:=srsym;
|
|
{ it is NOT necessarily the owner
|
|
it can be a withsymtable !!! }
|
|
lastsrsymtable:=srsymtable;
|
|
if assigned(srsym) and (srsym^.typ=labelsym) then
|
|
begin
|
|
consume(token);
|
|
consume(_COLON);
|
|
if plabelsym(srsym)^.defined then
|
|
Message(sym_e_label_already_defined);
|
|
plabelsym(srsym)^.defined:=true;
|
|
|
|
{ statement modifies srsym }
|
|
labelnr:=plabelsym(srsym)^.lab;
|
|
lastsymknown:=false;
|
|
{ the pointer to the following instruction }
|
|
{ isn't a very clean way }
|
|
code:=gensinglenode(labeln,statement{$ifndef tp}(){$endif});
|
|
code^.labelnr:=labelnr;
|
|
{ sorry, but there is a jump the easiest way }
|
|
goto ready;
|
|
end;
|
|
end;
|
|
p:=expr;
|
|
if not(p^.treetype in [calln,assignn,breakn,inlinen,
|
|
continuen]) then
|
|
Message(cg_e_illegal_expression);
|
|
{ specify that we don't use the value returned by the call }
|
|
{ Question : can this be also improtant
|
|
for inlinen ??
|
|
it is used for :
|
|
- dispose of temp stack space
|
|
- dispose on FPU stack }
|
|
if p^.treetype=calln then
|
|
p^.return_value_used:=false;
|
|
code:=p;
|
|
end;
|
|
end;
|
|
ready:
|
|
if assigned(code) then
|
|
set_tree_filepos(code,filepos);
|
|
statement:=code;
|
|
end;
|
|
|
|
function block(islibrary : boolean) : ptree;
|
|
|
|
var
|
|
funcretsym : pfuncretsym;
|
|
storepos : tfileposinfo;
|
|
|
|
begin
|
|
if procinfo^.retdef<>pdef(voiddef) then
|
|
begin
|
|
{ if the current is a function aktprocsym is non nil }
|
|
{ and there is a local symtable set }
|
|
storepos:=tokenpos;
|
|
tokenpos:=aktprocsym^.fileinfo;
|
|
funcretsym:=new(pfuncretsym,init(aktprocsym^.name,procinfo));
|
|
{ insert in local symtable }
|
|
symtablestack^.insert(funcretsym);
|
|
tokenpos:=storepos;
|
|
if ret_in_acc(procinfo^.retdef) or (procinfo^.retdef^.deftype=floatdef) then
|
|
procinfo^.retoffset:=-funcretsym^.address;
|
|
procinfo^.funcretsym:=funcretsym;
|
|
{ insert result also if support is on }
|
|
if (m_result in aktmodeswitches) then
|
|
begin
|
|
procinfo^.resultfuncretsym:=new(pfuncretsym,init('RESULT',procinfo));
|
|
symtablestack^.insert(procinfo^.resultfuncretsym);
|
|
end;
|
|
end;
|
|
read_declarations(islibrary);
|
|
|
|
{ temporary space is set, while the BEGIN of the procedure }
|
|
if (symtablestack^.symtabletype=localsymtable) then
|
|
procinfo^.firsttemp := -symtablestack^.datasize
|
|
else procinfo^.firsttemp := 0;
|
|
|
|
{ space for the return value }
|
|
{ !!!!! this means that we can not set the return value
|
|
in a subfunction !!!!! }
|
|
{ because we don't know yet where the address is }
|
|
if procinfo^.retdef<>pdef(voiddef) then
|
|
begin
|
|
if ret_in_acc(procinfo^.retdef) or (procinfo^.retdef^.deftype=floatdef) then
|
|
{ if (procinfo^.retdef^.deftype=orddef) or
|
|
(procinfo^.retdef^.deftype=pointerdef) or
|
|
(procinfo^.retdef^.deftype=enumdef) or
|
|
(procinfo^.retdef^.deftype=procvardef) or
|
|
(procinfo^.retdef^.deftype=floatdef) or
|
|
(
|
|
(procinfo^.retdef^.deftype=setdef) and
|
|
(psetdef(procinfo^.retdef)^.settype=smallset)
|
|
) then }
|
|
begin
|
|
{ the space has been set in the local symtable }
|
|
procinfo^.retoffset:=-funcretsym^.address;
|
|
if ((procinfo^.flags and pi_operator)<>0) and
|
|
assigned(opsym) then
|
|
{opsym^.address:=procinfo^.call_offset; is wrong PM }
|
|
opsym^.address:=-procinfo^.retoffset;
|
|
{ eax is modified by a function }
|
|
{$ifndef newcg}
|
|
{$ifdef i386}
|
|
usedinproc:=usedinproc or ($80 shr byte(R_EAX));
|
|
|
|
if is_64bitint(procinfo^.retdef) then
|
|
usedinproc:=usedinproc or ($80 shr byte(R_EDX))
|
|
{$endif}
|
|
{$ifdef m68k}
|
|
usedinproc:=usedinproc or ($800 shr word(R_D0));
|
|
|
|
if is_64bitint(procinfo^.retdef) then
|
|
usedinproc:=usedinproc or ($800 shr byte(R_D1))
|
|
{$endif}
|
|
{$endif newcg}
|
|
end;
|
|
end;
|
|
|
|
{Unit initialization?.}
|
|
if (lexlevel=unit_init_level) and (current_module^.is_unit) then
|
|
if (token=_END) then
|
|
begin
|
|
consume(_END);
|
|
block:=nil;
|
|
end
|
|
else
|
|
begin
|
|
if token=_INITIALIZATION then
|
|
begin
|
|
current_module^.flags:=current_module^.flags or uf_init;
|
|
block:=statement_block(_INITIALIZATION);
|
|
end
|
|
else if (token=_FINALIZATION) then
|
|
begin
|
|
if (current_module^.flags and uf_finalize)<>0 then
|
|
block:=statement_block(_FINALIZATION)
|
|
else
|
|
begin
|
|
block:=nil;
|
|
exit;
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
current_module^.flags:=current_module^.flags or uf_init;
|
|
block:=statement_block(_BEGIN);
|
|
end;
|
|
end
|
|
else
|
|
block:=statement_block(_BEGIN);
|
|
end;
|
|
|
|
function assembler_block : ptree;
|
|
|
|
begin
|
|
read_declarations(false);
|
|
{ temporary space is set, while the BEGIN of the procedure }
|
|
if symtablestack^.symtabletype=localsymtable then
|
|
procinfo^.firsttemp := -symtablestack^.datasize
|
|
else
|
|
procinfo^.firsttemp := 0;
|
|
|
|
{ assembler code does not allocate }
|
|
{ space for the return value }
|
|
if procinfo^.retdef<>pdef(voiddef) then
|
|
begin
|
|
if ret_in_acc(procinfo^.retdef) then
|
|
begin
|
|
{ in assembler code the result should be directly in %eax
|
|
procinfo^.retoffset:=procinfo^.firsttemp-procinfo^.retdef^.size;
|
|
procinfo^.firsttemp:=procinfo^.retoffset; }
|
|
|
|
{$ifndef newcg}
|
|
{$ifdef i386}
|
|
usedinproc:=usedinproc or ($80 shr byte(R_EAX))
|
|
{$endif}
|
|
{$ifdef m68k}
|
|
usedinproc:=usedinproc or ($800 shr word(R_D0))
|
|
{$endif}
|
|
{$endif newcg}
|
|
end
|
|
{
|
|
else if not is_fpu(procinfo^.retdef) then
|
|
should we allow assembler functions of big elements ?
|
|
YES (FK)!!
|
|
Message(parser_e_asm_incomp_with_function_return);
|
|
}
|
|
end;
|
|
{ set the framepointer to esp for assembler functions }
|
|
{ but only if the are no local variables }
|
|
{ added no parameter also (PM) }
|
|
{ disable for methods, because self pointer is expected }
|
|
{ at -8(%ebp) (JM) }
|
|
if not(assigned(procinfo^._class)) and
|
|
(po_assembler in aktprocsym^.definition^.procoptions) and
|
|
(aktprocsym^.definition^.localst^.datasize=0) and
|
|
(aktprocsym^.definition^.parast^.datasize=0) and
|
|
not(ret_in_param(aktprocsym^.definition^.retdef)) then
|
|
begin
|
|
procinfo^.framepointer:=stack_pointer;
|
|
{ set the right value for parameters }
|
|
dec(aktprocsym^.definition^.parast^.address_fixup,target_os.size_of_pointer);
|
|
dec(procinfo^.call_offset,target_os.size_of_pointer);
|
|
end;
|
|
{ force the asm statement }
|
|
if token<>_ASM then
|
|
consume(_ASM);
|
|
procinfo^.Flags := procinfo^.Flags Or pi_is_assembler;
|
|
assembler_block:=_asm_statement;
|
|
{ becuase the END is already read we need to get the
|
|
last_endtoken_filepos here (PFV) }
|
|
last_endtoken_filepos:=tokenpos;
|
|
end;
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.106 1999-11-06 14:34:23 peter
|
|
* truncated log to 20 revs
|
|
|
|
Revision 1.105 1999/10/22 10:39:35 peter
|
|
* split type reading from pdecl to ptype unit
|
|
* parameter_dec routine is now used for procedure and procvars
|
|
|
|
Revision 1.104 1999/10/14 14:57:54 florian
|
|
- removed the hcodegen use in the new cg, use cgbase instead
|
|
|
|
Revision 1.103 1999/09/27 23:44:56 peter
|
|
* procinfo is now a pointer
|
|
* support for result setting in sub procedure
|
|
|
|
Revision 1.102 1999/09/16 23:05:54 florian
|
|
* m68k compiler is again compilable (only gas writer, no assembler reader)
|
|
|
|
Revision 1.101 1999/09/10 18:48:09 florian
|
|
* some bug fixes (e.g. must_be_valid and procinfo^.funcret_is_valid)
|
|
* most things for stored properties fixed
|
|
|
|
Revision 1.100 1999/09/07 14:12:36 jonas
|
|
* framepointer cannot be changed to esp for methods
|
|
|
|
Revision 1.99 1999/08/26 21:10:08 peter
|
|
* better error recovery for case
|
|
|
|
Revision 1.98 1999/08/05 16:53:05 peter
|
|
* V_Fatal=1, all other V_ are also increased
|
|
* Check for local procedure when assigning procvar
|
|
* fixed comment parsing because directives
|
|
* oldtp mode directives better supported
|
|
* added some messages to errore.msg
|
|
|
|
Revision 1.97 1999/08/04 13:02:59 jonas
|
|
* all tokens now start with an underscore
|
|
* PowerPC compiles!!
|
|
|
|
Revision 1.96 1999/08/04 00:23:19 florian
|
|
* renamed i386asm and i386base to cpuasm and cpubase
|
|
|
|
Revision 1.95 1999/08/03 22:03:03 peter
|
|
* moved bitmask constants to sets
|
|
* some other type/const renamings
|
|
|
|
Revision 1.94 1999/08/03 17:09:39 florian
|
|
* the alpha compiler can be compiled now
|
|
|
|
Revision 1.93 1999/08/02 21:28:59 florian
|
|
* the main branch psub.pas is now used for
|
|
newcg compiler
|
|
|
|
Revision 1.92 1999/07/26 09:42:14 florian
|
|
* bugs 494-496 fixed
|
|
|
|
Revision 1.91 1999/06/30 22:16:22 florian
|
|
* use of is_ordinal checked: often a qword/int64 isn't allowed (case/for ...)
|
|
* small qword problems fixed
|
|
|
|
Revision 1.90 1999/06/22 16:24:43 pierre
|
|
* local browser stuff corrected
|
|
|
|
Revision 1.89 1999/06/17 13:19:54 pierre
|
|
* merged from 0_99_12 branch
|
|
|
|
Revision 1.88.2.1 1999/06/17 12:51:46 pierre
|
|
* changed is_assignment_overloaded into
|
|
function assignment_overloaded : pprocdef
|
|
to allow overloading of assignment with only different result type
|
|
|
|
Revision 1.88 1999/06/15 13:19:46 pierre
|
|
* better uninitialized var tests for TP mode
|
|
|
|
Revision 1.87 1999/05/27 19:44:50 peter
|
|
* removed oldasm
|
|
* plabel -> pasmlabel
|
|
* -a switches to source writing automaticly
|
|
* assembler readers OOPed
|
|
* asmsymbol automaticly external
|
|
* jumptables and other label fixes for asm readers
|
|
|
|
}
|
|
|