wxperl-users

[wxperl-users] Wx::wxVERSION and locale clash

[Johan V. <jvr...@sq...>]

The result of Wx::wxVERSION seems to be produced with sprintf %f
format, and therefore obeys the locale settings.

  $ env LANG=en_GB perl -MWx -wle 'print $Wx::wxVERSION'
  2.006003
  $ env LANG=nl_NL perl -MWx -wle 'print $Wx::wxVERSION'
  2,006003

This gives funny problems when modules use code like:

  if( Wx::wxVERSION() lt '2.006003') { ... }

I think wx::wxVERSION should always use dot-notation, regardless
of the locale setting.

-- Johan

Re: [wxperl-users] Wx::wxVERSION and locale clash

[Mark D. <mar...@zn...>]

Hi,

I am guilty of using

if( Wx::wxVERSION() lt '2.006003') { ... }

in my code.
It started off as a reaction to:

Wx::wxVERSION() < 2.006003

returning true when the wxWidgets version was in fact 2.6.3

This is a problem with floating point numbers, I believe.

One soluition I will start to use with the current implementation, if my question is "is wxWidgets less than 2.6.3", is to do

if( Wx::wxVERSION() < 2.0060025) { ... }

It's ugly but it will work for numeric comparison and should therefore be locale independent.

> I think wx::wxVERSION should always use dot-notation, regardless
> of the locale setting.

That would seem a good idea going forward.


MarK





Johan Vromans wrote:
> The result of Wx::wxVERSION seems to be produced with sprintf %f
> format, and therefore obeys the locale settings.
> 
>   $ env LANG=en_GB perl -MWx -wle 'print $Wx::wxVERSION'
>   2.006003
>   $ env LANG=nl_NL perl -MWx -wle 'print $Wx::wxVERSION'
>   2,006003
> 
> This gives funny problems when modules use code like:
> 
>   if( Wx::wxVERSION() lt '2.006003') { ... }
> 
> I think wx::wxVERSION should always use dot-notation, regardless
> of the locale setting.
> 
> -- Johan
> 
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Re: [wxperl-users] Wx::wxVERSION and locale clash

[Mattia B. <mat...@li...>]

On Fri, 11 May 2007 14:36:25 +0200
Johan Vromans <jvr...@sq...> wrote:

  Hi,

> The result of Wx::wxVERSION seems to be produced with sprintf %f
> format, and therefore obeys the locale settings.

  This is strange, because it is internally set as a float-only:

mbarbon@cheshirecat:$ perl -MWx -MDevel::Peek -e 'Dump $Wx::wxVERSION'
SV = NV(0x536d90) at 0x53fad0
  REFCNT = 1
  FLAGS = (NOK,pNOK)
  NV = 2.009

  So wxPerl never sets it as a string (for those not familiar
with Perl internals, the scalar on has a floating point part
(NV) and only the NV-part-OK flags (NOK, pNOK) are set).

>   $ env LANG=en_GB perl -MWx -wle 'print $Wx::wxVERSION'
>   2.006003
>   $ env LANG=nl_NL perl -MWx -wle 'print $Wx::wxVERSION'
>   2,006003

> This gives funny problems when modules use code like:
> 
>   if( Wx::wxVERSION() lt '2.006003') { ... }

  If you compare numbers as strings you are going to have
more troubles.
 
Regards,
Mattia