Re: [Vala] VAPI-Bindings to obscure c-types.

[Guillaume Poirier-Morency <guillaumepoiriermorency gmail com>]

There's a rank table sitting somewhere and I'm always looking for it. It
would be really nice to add it to
https://wiki.gnome.org/Projects/Vala/Manual/Attributes

If you want some more examples of numeric datatypes, I also have defined a
couple in
https://github.com/arteymix/numeric-glib/blob/master/src/numeric-glib-1.0.vapi

2016-12-05 13:16 GMT-05:00 Al Thomas <astavale yahoo co uk>:

> ________________________________
> > From: Guillaume Poirier-Morency <guillaumepoiriermorency gmail com>
> > Sent: Monday, 5 December 2016, 17:30
> > Subject: Re: [Vala] VAPI-Bindings to obscure c-types.
>
> > You could also use a [FloatingType] declaration and not mess with
> pre-processor directives.
>
> > [FloatingType]
> > public struct dReal {}
>
>
> Nice solution. I presume [FloatingType] allows for the struct to be
> initialized with a real literal, whereas just using [SimpleType] means it
> has to use the struct syntax. So
>
> dReal x = 1.23456;
>
> instead of
>
>
> dReal x = { 1.23456 );
>
> >  [SimpleType]
> >  [CCode (cname = "dReal", has_type_id = false)]
> >  public struct dReal : float {
> >  }
>
>
> In terms of Vala syntax I think [FloatingType], [IntegerType] and
> [BooleanType] enable the use of the relevant Vala literal syntax when
> initializing the struct. I'm not so sure about the implicit casting rules
> in Vala, is the rank detail required? There is also a width detail.
>
> In terms of the C code generated the glib-2.0.vapi also has CCode details
> for 'default_value' and for doubles 'type_signature'. Not sure how relevant
> they are.
>
> It would be nice to get my understanding of [FloatingType], [IntegerType]
> and [BooleanType] nailed and I'll try updating the Simple Types section of
> the Legacy Bindings doc.
>
> Al



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Guillaume Poirier-Morency <guillaumepoiriermorency gmail com>

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