Hi

I am using PyD with latest stable LDC on Arch Linux 64 bit.

I have various structures I am trying to wrap to pass to python.  For example:

struct PlotLines
{
	KPDateTime[] start_dates;
	KPDateTime[] end_dates;
	double[] y;
	string[] colors;
	long[] weights;
	string[] styles;
}

import pyd.pyd;
extern(C) void PydMain()
{
def!(bokehDownload,PyName!"bokeh_download", BokehBars function(string,bool))();
def!(bokehCountdown,PyName!"bokeh_countdown",CanvasTable function(BokehBars,bool,bool))();
module_init();
wrap_struct!(BokehBars,Member!("dates"),Member!("opens"),Member!("highs"),Member!("lows"),Member!("closes"),Member!("volumes"),Member!("openinterests"));
wrap_struct!(KPDateTime,Member!"year",Member!"month",Member!"day",Member!"hour",Member!"minute",Member!"second");
wrap_struct!(CanvasTable,Member!"plot_title",Member!"x_label",Member!"y_label",Member!"annotations",Member!"lines",Member!"bars",Member!"studies",Member!"grid_sequence");
wrap_struct!(PlotLines,Member!"start_dates",Member!"end_dates",Member!"y",Member!"colors",Member!"weights",Member!"styles");
wrap_struct!(PlotStudy,Member!"title",Member!"dates",Member!"lines",Member!"overbought",Member!"oversold");
wrap_struct!(PlotAnnotations,Member!"directions",Member!"dates",Member!"y",Member!"weights",Member!"values",Member!"colors",Member!"styles");
}

PyD doesn't seem to want to wrap a string[] member:

/home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/make_object.d(773): Error: cannot implicitly convert expression (python_to_d(item)) of type string to dchar[]
/home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/make_object.d(740): Error: function pyd.make_object.python_iter_to_d!(string[]).python_iter_to_d no return exp; or assert(0); at end of function
/home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/make_object.d(482): Error: template instance pyd.make_object.python_iter_to_d!(string[]) error instantiating
/home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/struct_wrap.d-mixin-73(73):        instantiated from here: python_to_d!(string[])
/home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/struct_wrap.d(105):        instantiated from here: wrapped_member!(PlotLines*, "colors", "rw")
/home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/class_wrap.d(1503):        instantiated from here: call!("PlotLines", PlotLines*)
/home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/class_wrap.d(1474):        instantiated from here: _wrap_class!(PlotLines, "PlotLines", "", "", Member!"start_dates", Member!"end_dates", Member!"y", Member!"colors", Member!"weights", Member!"styles")
/btrfs0/mirrored/kprop/core/prod/kprop/technical/demark/countdown/main13.d(72):        instantiated from here: wrap_struct!(PlotLines, Member!"start_dates", Member!"end_dates", Member!"y", Member!"colors", Member!"weights", Member!"styles")
error: command 'ldc2' failed with exit status 1

Any thoughts on whether I am doing something wrong, and if it is a PyD problem, how to circumvent it?


Thanks.


Laeeth.

On Wednesday, 18 March 2015 at 17:09:27 UTC, Laeeth Isharc wrote:
> Hi
>
> I am using PyD with latest stable LDC on Arch Linux 64 bit.
>
> I have various structures I am trying to wrap to pass to python.  For example:
>
> struct PlotLines
> {
> 	KPDateTime[] start_dates;
> 	KPDateTime[] end_dates;
> 	double[] y;
> 	string[] colors;
> 	long[] weights;
> 	string[] styles;
> }
>
> import pyd.pyd;
> extern(C) void PydMain()
> {
> def!(bokehDownload,PyName!"bokeh_download", BokehBars function(string,bool))();
> def!(bokehCountdown,PyName!"bokeh_countdown",CanvasTable function(BokehBars,bool,bool))();
> module_init();
> wrap_struct!(BokehBars,Member!("dates"),Member!("opens"),Member!("highs"),Member!("lows"),Member!("closes"),Member!("volumes"),Member!("openinterests"));
> wrap_struct!(KPDateTime,Member!"year",Member!"month",Member!"day",Member!"hour",Member!"minute",Member!"second");
> wrap_struct!(CanvasTable,Member!"plot_title",Member!"x_label",Member!"y_label",Member!"annotations",Member!"lines",Member!"bars",Member!"studies",Member!"grid_sequence");
> wrap_struct!(PlotLines,Member!"start_dates",Member!"end_dates",Member!"y",Member!"colors",Member!"weights",Member!"styles");
> wrap_struct!(PlotStudy,Member!"title",Member!"dates",Member!"lines",Member!"overbought",Member!"oversold");
> wrap_struct!(PlotAnnotations,Member!"directions",Member!"dates",Member!"y",Member!"weights",Member!"values",Member!"colors",Member!"styles");
> }
>
> PyD doesn't seem to want to wrap a string[] member:
>
> /home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/make_object.d(773): Error: cannot implicitly convert expression (python_to_d(item)) of type string to dchar[]
> /home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/make_object.d(740): Error: function pyd.make_object.python_iter_to_d!(string[]).python_iter_to_d no return exp; or assert(0); at end of function
> /home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/make_object.d(482): Error: template instance pyd.make_object.python_iter_to_d!(string[]) error instantiating
> /home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/struct_wrap.d-mixin-73(73):
>        instantiated from here: python_to_d!(string[])
> /home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/struct_wrap.d(105):
>        instantiated from here: wrapped_member!(PlotLines*, "colors", "rw")
> /home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/class_wrap.d(1503):
>        instantiated from here: call!("PlotLines", PlotLines*)
> /home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/class_wrap.d(1474):
>        instantiated from here: _wrap_class!(PlotLines, "PlotLines", "", "", Member!"start_dates", Member!"end_dates", Member!"y", Member!"colors", Member!"weights", Member!"styles")
> /btrfs0/mirrored/kprop/core/prod/kprop/technical/demark/countdown/main13.d(72):
>        instantiated from here: wrap_struct!(PlotLines, Member!"start_dates", Member!"end_dates", Member!"y", Member!"colors", Member!"weights", Member!"styles")
> error: command 'ldc2' failed with exit status 1
>
> Any thoughts on whether I am doing something wrong, and if it is a PyD problem, how to circumvent it?
>
>
> Thanks.
>
>
> Laeeth.

A quick glance over class_wrap.d suggests that pyd may not handle string[] correctly. I think it has the necessary special casing to deal with ElementType!string being dchar (not char), but this isn't triggered for string[]. I see you've filed a bug, hopefully someone will take a look. I might have time soon if no one else jumps on it.

Can you use immutable(dchar)[][] instead of string[]? That might work, but I haven't tested it.

On Wednesday, 18 March 2015 at 20:58:56 UTC, John Colvin wrote:
> On Wednesday, 18 March 2015 at 17:09:27 UTC, Laeeth Isharc wrote:
>> Hi
>>
>> I am using PyD with latest stable LDC on Arch Linux 64 bit.
>>
>> I have various structures I am trying to wrap to pass to python.  For example:
>>
>> struct PlotLines
>> {
>> 	KPDateTime[] start_dates;
>> 	KPDateTime[] end_dates;
>> 	double[] y;
>> 	string[] colors;
>> 	long[] weights;
>> 	string[] styles;
>> }
>>
>> import pyd.pyd;
>> extern(C) void PydMain()
>> {
>> def!(bokehDownload,PyName!"bokeh_download", BokehBars function(string,bool))();
>> def!(bokehCountdown,PyName!"bokeh_countdown",CanvasTable function(BokehBars,bool,bool))();
>> module_init();
>> wrap_struct!(BokehBars,Member!("dates"),Member!("opens"),Member!("highs"),Member!("lows"),Member!("closes"),Member!("volumes"),Member!("openinterests"));
>> wrap_struct!(KPDateTime,Member!"year",Member!"month",Member!"day",Member!"hour",Member!"minute",Member!"second");
>> wrap_struct!(CanvasTable,Member!"plot_title",Member!"x_label",Member!"y_label",Member!"annotations",Member!"lines",Member!"bars",Member!"studies",Member!"grid_sequence");
>> wrap_struct!(PlotLines,Member!"start_dates",Member!"end_dates",Member!"y",Member!"colors",Member!"weights",Member!"styles");
>> wrap_struct!(PlotStudy,Member!"title",Member!"dates",Member!"lines",Member!"overbought",Member!"oversold");
>> wrap_struct!(PlotAnnotations,Member!"directions",Member!"dates",Member!"y",Member!"weights",Member!"values",Member!"colors",Member!"styles");
>> }
>>
>> PyD doesn't seem to want to wrap a string[] member:
>>
>> /home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/make_object.d(773): Error: cannot implicitly convert expression (python_to_d(item)) of type string to dchar[]
>> /home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/make_object.d(740): Error: function pyd.make_object.python_iter_to_d!(string[]).python_iter_to_d no return exp; or assert(0); at end of function
>> /home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/make_object.d(482): Error: template instance pyd.make_object.python_iter_to_d!(string[]) error instantiating
>> /home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/struct_wrap.d-mixin-73(73):
>>       instantiated from here: python_to_d!(string[])
>> /home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/struct_wrap.d(105):
>>       instantiated from here: wrapped_member!(PlotLines*, "colors", "rw")
>> /home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/class_wrap.d(1503):
>>       instantiated from here: call!("PlotLines", PlotLines*)
>> /home/laeeth/anaconda/lib/python2.7/site-packages/pyd/infrastructure/pyd/class_wrap.d(1474):
>>       instantiated from here: _wrap_class!(PlotLines, "PlotLines", "", "", Member!"start_dates", Member!"end_dates", Member!"y", Member!"colors", Member!"weights", Member!"styles")
>> /btrfs0/mirrored/kprop/core/prod/kprop/technical/demark/countdown/main13.d(72):
>>       instantiated from here: wrap_struct!(PlotLines, Member!"start_dates", Member!"end_dates", Member!"y", Member!"colors", Member!"weights", Member!"styles")
>> error: command 'ldc2' failed with exit status 1
>>
>> Any thoughts on whether I am doing something wrong, and if it is a PyD problem, how to circumvent it?
>>
>>
>> Thanks.
>>
>>
>> Laeeth.
>
> A quick glance over class_wrap.d suggests that pyd may not handle string[] correctly. I think it has the necessary special casing to deal with ElementType!string being dchar (not char), but this isn't triggered for string[]. I see you've filed a bug, hopefully someone will take a look. I might have time soon if no one else jumps on it.
>
> Can you use immutable(dchar)[][] instead of string[]? That might work, but I haven't tested it.

Hi John.

dchar[] works, but I am not sure about immutable.  I turned the strings used to populate the struct into dchar by appending .array to the end (there may be a better way).

Thanks for looking at it.


Laeeth