C-style nested structs convert to D
Hey all, I'm trying to rewrite a few .h files into D so I can call a C library.
One snag I've hit is this guy:
struct _tree_t {
_tree_t* next;
_tree_t* father;
_tree_t* sons;
}
D won't do the nested struct thing, so I need to convert this into something D
will like, but which the library will still take in. What should I do?
How many people / projects are using Tango now?
How many people / projects are using Tango at this time? I am considering switching over to tango instead of phobos due to missing features, but mainly I think because of bugs that don't seem to get fixed. I had a look round for a poll on my question but couldn't really see one. It seems to me that most people are using tango now though, for any amount of 'serious' work.
Re: How many people / projects are using Tango now?
On Wed, 18 Mar 2009 10:50:23 +, Spacen Jasset wrote: How many people / projects are using Tango at this time? I am considering switching over to tango instead of phobos due to missing features, but mainly I think because of bugs that don't seem to get fixed. I had a look round for a poll on my question but couldn't really see one. It seems to me that most people are using tango now though, for any amount of 'serious' work. I use Tango, and have used it to develop utilities for my company. I tried using Phobos for about a week, but found the lack of support for socket and process I/O didn't fit my needs. I'm sure it's improved since then (about 2 years ago), but it would be impossible for me to switch back now :) I contribute regularly to Tango, and I enjoy that aspect of it. I also find the developers more accessible and focused on practical matters versus not-yet-proven radical language features. I'm not saying this in a negative way -- I think the steps Walter and Andrei are taking towards making D2 suitable for future needs are worth while -- but when one has to get work done, one needs to use something that works now :) -Steve
Re: Segfault (NullPointerException) in Linux
Qian Xu schrieb:
--- code 2 (current solution) --
public test(MyObj obj)
{
if (obj !is null
obj.getObj2 !is null
obj.getObj2.getObj3 !is null)
{
obj.getObj2.getObj3.test();
}
}
--
If you want to be able to return something like nothing, you can use
NullObject. That is, return an object that lets you navigate the
references and lets you test for it being a null object.
auto o = obj.getObj2.getObj3;
if( !o.isNull() ){
o.test();
}
C callbacks?
I've hit another snag on my C library interfacing. The .h defines a function: //typedef bool (*TCOD_bsp_callback_t)(TCOD_bsp_t *node, void *userData); bool* bsp_callback_t(bsp_t* node, void* userData); //bsp_t is a struct defining the bsp tree Sidenote: Did I translate that right? Anyway, this function is later passed into various functions, like: bool bsp_traverse_pre_order(bsp_t *node, bsp_callback_t listener, void *userData); I've tried doing some reading on this board regarding c callbacks and delegates, but it feels a bit over my head. Can anyone assist me in figuring out how to D-ify this bit of code so I can interact with the C dll?
