mirror of
https://github.com/byteworksinc/ORCA-Pascal.git
synced 2024-11-23 06:31:55 +00:00
This patch allows forward object declarations, in the same manner as delphi. To pre-declare an object, use a semicolon after the object keyword.
Example:
Type
forwardObject = Object; {forward declaration}
myObject = Object
count: integer;
procedure init;
function createForwardObject: forwardObject;
end;
fowardObject = Object (myObject)
procedure init; override;
end;
---
outstanding issues:
new(forward_declared_object); -> error 44, "error in type of standard procedure parameter"
OtherObject = Object (ForwardDeclaredObject) end; -> errror 129, "type of variable must be object"
debugger symbol tables
This commit is contained in:
Kelvin Sherlock
parent
0548a011a9
commit
7d6b083546
2
call.pas
2
call.pas
@ -1281,7 +1281,7 @@ if gattr.typtr <> nil then
|
||||
lsp := eltype^.recvar;
|
||||
end; {if}
|
||||
end {if}
|
||||
else if form = objects then begin
|
||||
else if (form = objects) and (objdef) then begin
|
||||
lsize := objsize;
|
||||
ofld := objfld;
|
||||
end {else if}
|
||||
|
||||
173
parser.pas
173
parser.pas
@ -117,6 +117,7 @@ var
|
||||
objectcp: ctp; {last procedure or function identifier}
|
||||
objectName: pString; {object name (for methods)}
|
||||
objectType: stp; {type of method's object}
|
||||
objptr: ctp; {linked list of objects}
|
||||
|
||||
{structured constants:}
|
||||
{---------------------}
|
||||
@ -356,7 +357,7 @@ end; {DoConstant}
|
||||
Duplicate(ncp^.llink, ocp^.llink);
|
||||
Duplicate(ncp^.rlink, ocp^.rlink);
|
||||
end; {if}
|
||||
end; {Dulpicate}
|
||||
end; {Duplicate}
|
||||
|
||||
|
||||
procedure SimpleType (fsys:setofsys; var fsp:stp; var fsize:addrrange);
|
||||
@ -979,80 +980,113 @@ end; {DoConstant}
|
||||
if not isType then
|
||||
Error(127);
|
||||
|
||||
{set up a new display}
|
||||
oldtop := top;
|
||||
if top < displimit then begin
|
||||
top := top+1;
|
||||
with display[top] do begin
|
||||
fname := nil;
|
||||
flabel := nil;
|
||||
labsused := nil;
|
||||
occur := rec;
|
||||
{ check for previous foward declaration }
|
||||
lsp := nil;
|
||||
lcp := objptr;
|
||||
while (lcp <> nil) and (CompNames(objectName, lcp^.name^) <> 0)
|
||||
do lcp := lcp^.next;
|
||||
|
||||
if lcp <> nil then lsp := lcp^.idtype;
|
||||
if (sy <> semicolon) and (lsp <> nil) and (lsp^.objdef) then lsp := nil;
|
||||
|
||||
if lsp = nil then begin
|
||||
{set up the type}
|
||||
lsp := pointer(Malloc(sizeof(structure)));
|
||||
with lsp^ do begin
|
||||
form := objects;
|
||||
objname := nil;
|
||||
objsize := 6;
|
||||
objlevel := 1;
|
||||
objparent := nil;
|
||||
objdef := true;
|
||||
size := ptrsize;
|
||||
hasSFile := false;
|
||||
end; {with}
|
||||
end;
|
||||
|
||||
{ handle forward declaration }
|
||||
if sy = semicolon then begin
|
||||
{ if lcp is defined, then we're already inserted, nothing to do}
|
||||
if lcp = nil then begin
|
||||
lsp^.objdef := false;
|
||||
objectcp^.idtype := lsp;
|
||||
EnterId(objectcp);
|
||||
objectcp^.next := objptr;
|
||||
objptr := objectcp;
|
||||
end;
|
||||
end else begin
|
||||
|
||||
{set up a new display}
|
||||
oldtop := top;
|
||||
if top < displimit then begin
|
||||
top := top+1;
|
||||
with display[top] do begin
|
||||
fname := nil;
|
||||
flabel := nil;
|
||||
labsused := nil;
|
||||
occur := rec;
|
||||
end
|
||||
end
|
||||
end
|
||||
else
|
||||
Error(107);
|
||||
disp1 := 6;
|
||||
else
|
||||
Error(107);
|
||||
disp1 := 6;
|
||||
|
||||
{set up the type}
|
||||
lsp := pointer(Malloc(sizeof(structure)));
|
||||
with lsp^ do begin
|
||||
form := objects;
|
||||
objname := nil;
|
||||
objsize := 6;
|
||||
objlevel := 1;
|
||||
objparent := nil;
|
||||
size := ptrsize;
|
||||
hasSFile := false;
|
||||
end; {with}
|
||||
|
||||
{handle inheritance}
|
||||
if sy = lparent then begin
|
||||
InSymbol;
|
||||
if sy = ident then begin
|
||||
SearchId([types], lcp2);
|
||||
if lcp2 <> nil then begin
|
||||
if lcp2^.idtype <> nil then
|
||||
if lcp2^.idtype^.form = objects then begin
|
||||
Duplicate(display[top].fname, lcp2^.idtype^.objfld);
|
||||
disp1 := lcp2^.idtype^.objsize;
|
||||
lsp^.objparent := lcp2^.idtype;
|
||||
lsp^.objlevel := lcp2^.idtype^.objlevel + 1;
|
||||
end {if}
|
||||
else
|
||||
Error(129);
|
||||
{handle inheritance}
|
||||
if sy = lparent then begin
|
||||
InSymbol;
|
||||
if sy = ident then begin
|
||||
SearchId([types], lcp2);
|
||||
if lcp2 <> nil then begin
|
||||
if lcp2^.idtype <> nil then
|
||||
if (lcp2^.idtype^.form = objects) and (lcp2^.idtype^.objdef)
|
||||
then begin
|
||||
Duplicate(display[top].fname, lcp2^.idtype^.objfld);
|
||||
disp1 := lcp2^.idtype^.objsize;
|
||||
lsp^.objparent := lcp2^.idtype;
|
||||
lsp^.objlevel := lcp2^.idtype^.objlevel + 1;
|
||||
end {if}
|
||||
else
|
||||
Error(129);
|
||||
end {if}
|
||||
else
|
||||
Error(33);
|
||||
InSymbol;
|
||||
end {if}
|
||||
else
|
||||
Error(33);
|
||||
InSymbol;
|
||||
end {if}
|
||||
else
|
||||
Error(128);
|
||||
Match(rparent,4);
|
||||
end; {if}
|
||||
Error(128);
|
||||
Match(rparent,4);
|
||||
end; {if}
|
||||
|
||||
{compile the fields and methods}
|
||||
if sy in typebegsys then
|
||||
FieldList(fsys-[semicolon]+[endsy,procsy,funcsy], lsp1,
|
||||
lsp^.hasSFile, true);
|
||||
objectType := lsp;
|
||||
ttop := top;
|
||||
top := oldtop;
|
||||
EnterId(objectcp);
|
||||
top := ttop;
|
||||
objectcp^.idtype := lsp;
|
||||
ProcList(fsys-[semicolon]+[endsy]);
|
||||
if disp1 > $010000 then
|
||||
if SmallMemoryModel then
|
||||
Error(122);
|
||||
lsp^.objfld := display[top].fname;
|
||||
lsp^.objsize := disp1;
|
||||
{compile the fields and methods}
|
||||
if sy in typebegsys then
|
||||
FieldList(fsys-[semicolon]+[endsy,procsy,funcsy], lsp1,
|
||||
lsp^.hasSFile, true);
|
||||
objectType := lsp;
|
||||
if lsp^.objdef then begin
|
||||
ttop := top;
|
||||
top := oldtop;
|
||||
objectcp^.idtype := lsp;
|
||||
EnterId(objectcp);
|
||||
objectcp^.next := objptr;
|
||||
objptr := objectcp;
|
||||
top := ttop;
|
||||
end;
|
||||
lsp^.objdef := true;
|
||||
|
||||
lsp^.ispacked := ispacked;
|
||||
ExportUses;
|
||||
top := oldtop;
|
||||
Match(endsy,13);
|
||||
end {else if}
|
||||
ProcList(fsys-[semicolon]+[endsy]);
|
||||
if disp1 > $010000 then
|
||||
if SmallMemoryModel then
|
||||
Error(122);
|
||||
lsp^.objfld := display[top].fname;
|
||||
lsp^.objsize := disp1;
|
||||
|
||||
lsp^.ispacked := ispacked;
|
||||
ExportUses;
|
||||
top := oldtop;
|
||||
Match(endsy,13);
|
||||
end; {if not forward declaration}
|
||||
end {else if}
|
||||
{set} else if sy = setsy then begin
|
||||
InSymbol;
|
||||
Match(ofsy,8);
|
||||
@ -1268,7 +1302,7 @@ end; {DoConstant}
|
||||
else
|
||||
Error(16);
|
||||
objectName := lcp^.name^;
|
||||
objectCp := lcp;
|
||||
objectcp := lcp;
|
||||
Typ(fsys+[semicolon], lsp, lsize, true); {get the type}
|
||||
if lsp^.form = objects then
|
||||
lsp^.objname := lcp^.name;
|
||||
@ -5020,6 +5054,7 @@ end; {DoConstant}
|
||||
code := pointer(Calloc(sizeof(intermediate_code)));
|
||||
{code^.lab := nil;}
|
||||
fwptr := nil;
|
||||
objptr := nil;
|
||||
fextfilep := nil;
|
||||
thisType := nil; {not declaring a type}
|
||||
tempList := nil; {no temp variables}
|
||||
|
||||
@ -132,6 +132,7 @@ type
|
||||
objname: pstringptr; {object name}
|
||||
objlevel: integer; {generation level}
|
||||
objparent: stp; {parent or nil}
|
||||
objdef: boolean; {false if not defined}
|
||||
);
|
||||
files: (filtype: stp; filsize: addrrange);
|
||||
tagfld: (tagfieldp: ctp; fstvar: stp);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user