Gtk toArray List funkiness

[Joseph via Digitalmars-d-learn]

On Saturday, 16 September 2017 at 20:54:21 UTC, Mike Wey wrote:
> On 16-09-17 20:58, Joseph wrote:
>> 
>> https://github.com/gtkd-developers/GtkD/blob/master/demos/gtkD/TestWindow/TestWindow.d
>> 
>> 
>> has the code
>> 
>> foreach ( int i, string selection ; fs.getSelections())
>> {
>>  Â  writeln("File(s) selected [%d] %s",i,selection);
>> }
>> 
>> which is invalid for the demo, but
>> 
>> foreach ( int i, string selection ; 
>> fd.getFilenames().toArray!(string,?))
>> {
>>  Â  writeln("File(s) selected [%d] %s",i,selection);
>> }
>> 
>> results in some funky code. Gives errors in ObjectG about uint 
>> when setting ? to string, string* or void* or even uint:
>> 
>> GtkD\generated\gtkd\gobject\ObjectG.d(172): Error: 
>> incompatible types for ((obj) is (null)): 'uint' and 
>> 'typeof(null)'
>> GtkD\generated\gtkd\glib\ListSG.d(98): Error: template 
>> instance gobject.ObjectG.ObjectG.getDObject!(string, string, 
>> uint) error instantiating
>> test.d(91):Â Â Â Â Â Â Â  instantiated from here: toArray!(string, 
>> uint)
>> test.d(93): Error: invalid foreach aggregate 
>> `fd.getFilenames()`, define opApply(), range primitives, or 
>> use .tupleof
>> 
>> without specifying ? it assumes it's a tuple, which seems 
>> wrong?
>> 
>> 
>> 
>>  Â Â Â Â public T[] toArray(T, TC = typeof(T.tupleof[0]))()
>>  Â Â Â Â {
>>  Â Â Â Â Â Â Â  T[] arr = new T[length()];
>>  Â Â Â Â Â Â Â  ListSG list = this;
>>  Â Â Â Â Â Â Â  size_t count;
>> 
>>  Â Â Â Â Â Â Â  while(list !is null && count < arr.length)
>>  Â Â Â Â Â Â Â  {
>>  Â Â Â Â Â Â Â Â Â Â Â  arr[count] = 
>> ObjectG.getDObject!(T)(cast(TC)list.data);
>>  Â Â Â Â Â Â Â Â Â Â Â  list = list.next();
>>  Â Â Â Â Â Â Â Â Â Â Â  count++;
>>  Â Â Â Â Â Â Â  }
>> 
>>  Â Â Â Â Â Â Â  return arr;
>>  Â Â Â Â }
>> 
>> 
>>  Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â  foreach ( int i, 
>> Value selection ; fd.getFilenames().toArray!(Value)())
>> {
>>  Â  writeln("File(s) selected [%d] %s",i,selection.getString);
>> }
>> 
>> crashes ;/
>> 
>> I'm not sure what types are what and it changes depending on 
>> the input. I think Value is the wrong type to use but string 
>> doesn't work so...
>
> ListG and ListSG are missing an toArray overload for string. 
> And getFilenames returns a list of strings.
>
> I've added a string overload for toArray: 
> https://github.com/gtkd-developers/GtkD/commit/ba20490b38e502a4d281226572c83c662a700858


	public ListSG getFilenames()
	{
		auto p = gtk_file_chooser_get_filenames(getFileChooserStruct());

		if(p is null)
		{
			return null;
		}

		return new ListSG(cast(GSList*) p, true);
	}

Doesn't return a list of strings? That was the first thing I 
tried and the foreach loop wouldn't work over it because it was a 
ListSG.

Thanks.