Re: GHashTable with function pointers as values

[Emmanuele Bassi <ebassi gmail com>]

hi;

On 23 August 2014 11:18, Iñigo Martínez <inigomartinez gmail com> wrote:
> Yes, it works, but i doesn't look like the best approach:
>
> warning: ISO C forbids passing argument 3 of 'g_hash_table_insert'
> between function pointer and 'void *' [-Wpedantic]

drop `-Wpedantic`: it doesn't serve any practical purposes. instead,
identify a set of warnings that you care about, and use them.

in this particular case, we're talking about undefined behaviour that
every compiler that is not a university student project, or an arcane
compiler for a niche architecture, supports anyway.

in practice, everything that GLib supports, will also support this construct.

ciao,
 Emmanuele.

> 2014-08-22 18:29 GMT+02:00 Emmanuele Bassi <ebassi gmail com>:
> > hi;
> >
> > On 22 August 2014 17:10, Iñigo Martínez <inigomartinez gmail com> wrote:
> >
> > > I am trying to figure out the best way to use function pointers as
> > > values in a GHashTable. My idea is to call different functions based
> > > on different keys (strings).
> > >
> > > Looking at the API, this looks impossible, as the values are gpointers
> > > and not function pointers.
> >
> > gpointer is just a typedef to void*, which is perfectly capable of
> > holding a function pointer.
> >
> > > I'm thinking to wrap the function call in a structure, and hold its
> > > pointer in the table.
> > >
> > > Has anyone ever tried something similar ?
> >
> > yes, and it works fine.
> >
> > ciao,
> >  Emmanuele.
> >
> > --
> > http://www.bassi.io
> > [ ] ebassi [ gmail com]



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