Here's a copy reply to your bug report which for some reason does not seem to make it through:
"Ruslan Zakirov via RT" <bug-Glib-Object-Introspection rt cpan org >:
> Playing around with the module and vips library. Things got wrong quickly: Vips::Image->new_from_file is not generated. In .gir file it's marked with introspectable="0" attribute:
>
> 2442 <constructor name="new_from_file"
> 2443 c:identifier="vips_image_new_from_file" Looks like you've done everything correctly. Functions marked as introspectable=0 are simply not available from Perl (or any other language). In this case, the reason is that vips_image_new_from_file takes a variable number of arguments (indicated by the "..."), which is not supported by the introspection framework (mainly because the actual semantics of the implementation of "..." are complicated and platform-dependent). Most gobject-based libraries with varargs functions also offer alternative functions that take arrays, but that doesn't appear to be the case here.
> 2444 introspectable="0">
>
> Simple grep in typelib file shows that it's not there.
>
> In .h file it's marked with sentinel attribute:
>
> 437 VipsImage *vips_image_new_from_file( const char *name, ... )
> 438 __attribute__((sentinel));
>
> New to gobject world. Is something wrong with vips' gir file? with this module? Should I do some additional setup for such functions/methods?
The Python bindings seem to have a workaround: <https://github.com/jcupitt/libvips/blob/master/python/ >.packages/gi/overrides/Vips.py# L448
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