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I am trying to bind to Apache Arrow using this library. Most methods work, except for methods that (in C), take GLib::Lists as arguments. The C-bindings that are generated are expecting Pointer(Pointer(Void)), while the GObject constructors are expecting Pointer(Void), and so when the pointer gets passed, to_unsafe fails.
Minimal example:
require "gobject"
require_gobject "Arrow"
f0 = Arrow::Field.new("int_field", Arrow::Int8DataType.new)
f1 = Arrow::Field.new("bool_field", Arrow::BooleanDataType.new)
puts f0.to_string
puts f1.to_string
schema = Arrow::Schema.new(Box.box([f0, f1]))
# > 18767 |
# > 18768 | def self.new(fields : Void*) : self
# > 18769 | __var0 = LibArrow.schema_new(fields)
# ^--------
# Error: undefined method 'to_unsafe' for Pointer(Void)Here is the C function being called
I've tested out these methods using other language's GObject libraries, and it seems like these constructors accept the respective language's stdlib arrays where GLib::Lists are accepted.
I messed around a bit trying to update the return type for the TypeTag::GLIST, but didn't have any luck.
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