[Pharo-dev] [FFI] DNU ByteArray>>#rollAsDoubleToArity: arity

(In the latest FFI) Assume we have a native call declaration (we want to *get* values from x and y later): primGetCurrentPointX: x Y: y

<primitive: #primitiveNativeCall module: #NativeBoostPlugin error: errorCode>

^self nbCall: #( void cairo_get_current_point (self, *double * x, double * y*))

Trying to use it as: | x y |

x := (ByteArray new: 8). y := (ByteArray new: 8). self primGetCurrentPointX: x Y: y. ^ (x doubleAt: 1)@ (y doubleAt: 1)

Throws DNU ByteArray>>#rollAsDoubleToArity: arity . However if primitive would be modified to: ^self nbCall: #( void cairo_get_current_point (self, *void** * x, void * y*

))

Exception goes away. I'm just curios how it is supposed to be :) Cheers, Alex