[PATCH 11/13] Convert to TRUE/FALSE to stdbools true/false

Thiago Macieira thiago at macieira.org
Wed Jan 15 09:39:49 UTC 2014

On quarta-feira, 15 de janeiro de 2014 19:25:45, Dirk Hohndel wrote:
> On Wed, 2014-01-15 at 13:59 +0200, Lubomir I. Ivanov wrote:
> > On 15 January 2014 10:30, Anton Lundin <glance at acc.umu.se> wrote:
> > > I had problems with this one on Qt5.
> > 
> > this seems like a big change. could you elaborate why it was needed
> > exactly? i think it would be preferable that we don't use stdbool for
> > consistency with the C code.
> > for example, things like process_dives() are C backend calls.
> I'll let Thiago speak on this with more authority, but it was my
> understanding that true/false and TRUE/FALSE are intended to be
> compatible...

Qt 4's qglobal.h defined TRUE and FALSE:

#  ifndef TRUE
#   define TRUE true
#   define FALSE false
#  endif

Qt 5 does no such thing, they were removed in

Those macros had existed since Qt 1, from before the C++ standardisation, when 
some compilers did not have an actual bool type. We thought that they weren't 
needed in 2012 for C++ code. 

For Subsurface's C code, as long as we include C99's <stdbool.h>, we're fine. 
It does this in C mode:

#define bool    _Bool
#define true    1
#define false   0

So for Subsurface code: use bool, true, false (all lowercase).
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
   Software Architect - Intel Open Source Technology Center
      PGP/GPG: 0x6EF45358; fingerprint:
      E067 918B B660 DBD1 105C  966C 33F5 F005 6EF4 5358
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