Newbie GDC issues

[H. S. Teoh]

On Fri, Sep 06, 2013 at 01:49:17AM +0200, Ramon wrote:
> On D's, and in particular GDC's, way to conquer the world there will
> evidently be many newbies to notice D, look at it, be drawn to it
> (and be happily trapped).
> 
> I am such a newbie and the idea behind this thread is to collect all
> the issues, quirks and nuisances a newbie might encounter.
> Please note that quite typically this is not to do with GDC being at
> fault but rather with a newbie naturally not yet knowing all the ins
> and outs (like, e.g. that with GDC one must use "-fdebug" and not
> "-debug" as with dmd).

Note that -fdebug isn't the only one you have to watch out for. A *lot*
of DMD options are renamed in GDC (mainly due to conflicts with GCC
native options). Most of them are just prepended with -f (like -debug =>
-fdebug) but there are some that are complete renames (like -D => -fdoc)
and syntax rewrites (-Dddocdir => -fdoc-dir=docdir).

The gdc manpage should be consulted when in doubt.


> I assume that for most issues someone more experienced will step in
> and provide an explanation, a solution or a workaround or just some
> magic *g
> 
> So, here goes:
> 
> -------------
> 
> char[] someDynArray;
> 
> // in main, after someDynArray is somehow init'd...
> 
>      char c;
>      for(int i = 0; i < someDynArray; i++)
>         c = someDynArray[i];
> 
> Now, in the debugger:
> 
> >print someDynArray
> // whatever it happens to hold. Works fine.
> 
> >print someDynArray[i]
> Structure has no component named operator[].
> 
> Any ideas?

Hmm. Maybe try someDynArray.ptr[i]? (Caveat: I never tried this before,
so dunno if it will work.)

@Iain: on that note, it looks like gdb thinks it's debugging C++, but D
doesn't have anything called 'operator[]'. It would be Really Nice if we
could somehow coax gdb to use opIndex instead (though it doesn't really
help in the case of dyn arrays 'cos they are built-in, and don't
actually have any opIndex to speak of).


T

-- 
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