[Vala] Posix.lstat problems
I've got this piece of code:
using Posix;
int fuseguifs_getattr(string path, Posix.Stat *stbuf)
{
int res;
res = Posix.lstat(path, stbuf);
if (res == -1)
return -Posix.errno;
return 0;
}
static int main(string [] args)
{
Posix.Stat *a;
fuseguifs_getattr(/home/leon, a);
return 0;
}
When I'm trying to compile it I get this error:
test.vala:6.26-6.30: error: Argument 2: Cannot convert from
`Posix.Stat' to `Posix.Stat*'
res = Posix.lstat(path, stbuf);
^
Compilation failed: 1 error(s), 0 warning(s)
I've tried changing this:
fuseguifs_getattr(/home/leon, a);
to
fuseguifs_getattr(/home/leon, *a);
But then I get an error: Cannot pass value to reference or output
parameter
I've tried adding out:
res = Posix.lstat(path, out *stbuf);
That gives this error:
error: ref and out method arguments can only be used with fields,
parameters, local variables, and array element access
I can't change the fuseguifs_getattr method parameters because that's
part of how the fuse bindings expect it.
I'm really stuck. Does anyone how I can solve this?
Leon
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Re: [Vala] How to generate inline C functions?
Is there any CCode attribute to make the generated C function inline?
Or, is it possible to generate C macros instead of functions with vala?
For example:
class Test {
inline public void func1() {
}Vala tutorial sadly doesn't say a word about it, but it shell look
like:public inline void func1() {}This onw works currently in vala. [Macro]
public void func2() {
}
}
This is sound a great feature request.But I would like that the macro could
also not be function-like, butalso be able to define functon, varibles,
...(i.e. full featured CMacro).
Another question is, is it possible to use bit-field in vala classes?
Like this:
class Test {
private bool b1 : 1;
private bool b2 : 1;
private bool b3 : 1;
private uint i1 : 4;
}
Good feature request.Tal ___
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[Vala] research papers
Hi, I'm looking for research papers on Vala, GObject, or related technologies, but I can't seem to find anything on google scholar. Do they exist? thanks -august. -- http://aug.ment.org GPG: 0A8D 2BC7 243D 57D0 469D 9736 C557 458F 003E 6952 ___ vala-list mailing list vala-list@gnome.org http://mail.gnome.org/mailman/listinfo/vala-list
Re: [Vala] How to generate inline C functions?
2011/11/7 Tal Hadad tal...@hotmail.com
Is there any CCode attribute to make the generated C function inline?
Or, is it possible to generate C macros instead of functions with vala?
For example:
class Test {
inline public void func1() {
}Vala tutorial sadly doesn't say a word about it, but it shell look
like:public inline void func1() {}This onw works currently in vala.
[Macro]
public void func2() {
}
}
This is sound a great feature request.But I would like that the macro
could also not be function-like, butalso be able to define functon,
varibles, ...(i.e. full featured CMacro).
Vala produces static functions when possible, and gcc inlines them when
possible. So this is feature is already there.
Another question is, is it possible to use bit-field in vala classes?
Like this:
class Test {
private bool b1 : 1;
private bool b2 : 1;
private bool b3 : 1;
private uint i1 : 4;
}
It's not possible. This is something that could be trivially implemented
using a CCode argument like [CCode (bitfield = 1)] or such, without adding
new syntax.
If you have a good use case, you can request the feature at
bugzilla.gnome.org .
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[Vala] get the fg, bg colors
Hi all: I've been trying to get the RC info from a window, to be able to replicate the background color of an iconview in other parts with Cairo, but I've been unable to do it. I always receive a core dump. How can I get access to it? (foreground color, background color, text color, and so on). Thanks. -- Nos leemos RASTER(Linux user #228804) ras...@rastersoft.com http://www.rastersoft.com ___ vala-list mailing list vala-list@gnome.org http://mail.gnome.org/mailman/listinfo/vala-list
[Vala] Multiple Namespace problem
I'm seeing at GXml project (http://git.gnome.org/browse/gxml), and I
found that it uses two Namespaces to define its classes. But GXml
namespace don't have any class defined (yet), I suppose will be used
to define new modules after DOM is finished (may be XSD or others).
But when I try to generate GIR and typelib files, it tries to include
GXml module from outside (and doesn't exists of course) and Dom is
located inside GXml namespace. The next example generate a GIR file
but refuse to create typelib because GXml include fails.
Is this the expected behavior or what is the better to do on Multiple
and incomplete namespaces?
This is an example:
[CCode (gir_namespace=GXml, gir_version=1.0)]
namespace GXml {
[CCode (gir_namespace=GXml, gir_version=1.0)]
namespace Dom {
public class Node : GLib.Object {
public void foo() {
stdout.printf(Node.foo()\n);
}
}
public class Attr : Node {
public new void foo () {
stdout.printf(Attr.foo());
}
}
}
}
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Re: [Vala] Multiple Namespace problem
I believe the problem you have there is that you have nested namespaces and
there was a discussion sometime ago which said that GIR doesn't support it,
although I don't know if specifying the gir namespace should avoid it.
At that discussion (it's Support for custom attribute
introspection/reflection? if you want to search for it) they pointed to
this bug https://bugzilla.gnome.org/show_bug.cgi?id=576327
I believe that is your issue, but I'm no expert, I just found your problem
familiar.
Regards
On Mon, Nov 7, 2011 at 23:09, Daniel Espinosa eso...@gmail.com wrote:
I'm seeing at GXml project (http://git.gnome.org/browse/gxml), and I
found that it uses two Namespaces to define its classes. But GXml
namespace don't have any class defined (yet), I suppose will be used
to define new modules after DOM is finished (may be XSD or others).
But when I try to generate GIR and typelib files, it tries to include
GXml module from outside (and doesn't exists of course) and Dom is
located inside GXml namespace. The next example generate a GIR file
but refuse to create typelib because GXml include fails.
Is this the expected behavior or what is the better to do on Multiple
and incomplete namespaces?
This is an example:
[CCode (gir_namespace=GXml, gir_version=1.0)]
namespace GXml {
[CCode (gir_namespace=GXml, gir_version=1.0)]
namespace Dom {
public class Node : GLib.Object {
public void foo() {
stdout.printf(Node.foo()\n);
}
}
public class Attr : Node {
public new void foo () {
stdout.printf(Attr.foo());
}
}
}
}
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Re: [Vala] How to generate inline C functions?
Hi
On 07/11/2011, at 20:58, Luca Bruno lethalma...@gmail.com wrote:
2011/11/7 Tal Hadad tal...@hotmail.com
Is there any CCode attribute to make the generated C function inline?
Or, is it possible to generate C macros instead of functions with vala?
For example:
class Test {
inline public void func1() {
}Vala tutorial sadly doesn't say a word about it, but it shell look
like:public inline void func1() {}This onw works currently in vala.
[Macro]
public void func2() {
}
}
This is sound a great feature request.But I would like that the macro
could also not be function-like, butalso be able to define functon,
varibles, ...(i.e. full featured CMacro).
Vala produces static functions when possible, and gcc inlines them when
possible. So this is feature is already there.
I thought inline was already supported keyword in the past..
A way to do this is by using ccode or a define in a .h
But to be sincere... Inline is a premature optimization... Something like
register does. They are properly used by the compiler optimization correctly,
so users should not use them.
It's different case for 'volatile' do vala supports this? Maybe we could add a
ccode directive like cname, but to be appended before the return type.
[CCode (ctype=inline)]
int foo() {...
This way we can let the user do those tricks without messing the syntax with
stuff 99% users will missuse.
Functions defined in Macros should be forbidden by the compiler. They just mess
the code and the debuggers use to fail when stepping into them. Lines of code
loss their sense and can result on weird compiler errors.
Another question is, is it possible to use bit-field in vala classes?
Like this:
class Test {
private bool b1 : 1;
private bool b2 : 1;
private bool b3 : 1;
private uint i1 : 4;
}
It's not possible. This is something that could be trivially implemented
using a CCode argument like [CCode (bitfield = 1)] or such, without adding
new syntax.
If you have a good use case, you can request the feature at
bugzilla.gnome.org .
I remembee this was discussed some years ago and it was rejected because
implementation depends on C compiler and architecture.
Bitfields are not portable. And vala code aims to be coherent everywhere.
If you want bitfields use a .h and a .vapi defining such struct. You will
probably then need some ifdef tuning depending on the endian of the target
platform.
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