Re: [glade--]Compilation errors with Glade-2/glademm generated project

[Christof Petig <christof petig-baender de>]

Scott McLoughlin wrote:
> Christof,
>
> I'm going through the souce code. I see that main() immediately
> calls call_gtkmm_config(). This in turn calls,
>
>     CheckVersion("pkg-config --version", Configuration.pc_version,....)
>     if( Configurationgnome2) {
>         if(!!Configuration.pc_version) {
>             ....
>
> Also, the variable Configuration configuration; will cause the constructor
>
>     Configuration::Configuration()
>
> to be called prior to main()'s call to call_gtkmm_config().
no problem. really. It's intended that way.

> Going through this call chain, I can't see where Configuration.gnome2
> will be set. What am I missing?

should be fixed in CVS. (the call_gtkmm_config() at the top of main() 
was a leftover from a previous copy+paste)

> Also two comments.
>
> (1) The declaration    Configuration Configuration  will cause source
> readers to think that membervariables like  'gnome2' are static member
> variable. Something like 'Configuration theconfiguration' might be clearer.

Do you know of a good OSS source reader?

> (2) What's is logic of  'if(!!Configuration.pc_version)' in the above test.
> Why the double not?

operator! is defined for Pkg_Config, operator bool not. Since ! hardly 
has any side effects but an operator bool can get called in many many 
unexpected innocent looking statements I try to avoid it.

And operator bool semantically should mean the same as !! while being 
more dangerous (implicit unwanted conversion to e.g. int without a warning).

  Christof