#23 lazbarcode

[Petrus]

Hi,

I downloaded the LAZBARCODE tarball but didn't install the package into Lazarus.
Instead I want to only use the code at runtime.

The compiler gives me back four errors in zint.pas:

..\lazbarcodes\src\zint.pp(47,33) Error: Type "zint_render_line" is not completely defined
..\lazbarcodes\src\zint.pp(61,35) Error: Type "zint_render_string" is not completely defined
..\lazbarcodes\src\zint.pp(72,33) Error: Type "zint_render_ring" is not completely defined
..\lazbarcodes\src\zint.pp(81,36) Error: Type "zint_render_hexagon" is not completely defined
..\lazbarcodes\src\zint.pp(242,1) Fatal: There were 4 errors compiling module, stopping

Which settings in the compiler are required to make it compile ?

Thanks,
Peter

[José Mejuto]

The component was designed working with fpc 2.5.1 version, prior ones have a problem when define a record which have a pointer definition to itself as a field. The solution is quite easy, just simple reorder some definitions, instead:

type
zint_render_line = record
x : single;
y : single;
length : single;
width : single;
next : ^zint_render_line;
end;
PointerTo_zint_render_line=^zint_render_line;
PointerTo_PointerTo_zint_render_line=^PointerTo_zint_render_line;

It should be defined as:

---------------------------------
type
PointerTo_zint_render_line=^zint_render_line;
PointerTo_PointerTo_zint_render_line=^PointerTo_zint_render_line;
zint_render_line = record
x : single;
y : single;
length : single;
width : single;
next : PointerTo_zint_render_line; // ^zint_render_line;
end;
----------------------------

So pointers are defined first and then the record.

I'll attach by now a modified zint.pp (thanks to Igor Z for fixing the problem).

[José Mejuto]

Changes commited in SVN Rev 2125

[Petrus]

Thanks for very fast replay.

It compiles now, as You described - thanks !!