Looks interesting. But what do i pass with ccall(:flip, Void, (mytype,), t)?
When to use Ptr{Void} and when Ptr{mytype}?
On Thursday, January 8, 2015 4:22:37 PM UTC+1, Steven G. Johnson wrote:
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> On Thursday, January 8, 2015 9:59:13 AM UTC-5, Andreas Lobinger wrote:
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>> Actually i do not want to pass by value. I thought composite types are
>> references by a pointer (to the first element, like in C) and having mytype
>> as the type of input parameter would pass the pointer to the library call?
>>
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> No, if you want to pass a pointer, then you should declare it as such:
>
> t = mytype(0,0)
> ccall(:flip, Void, (Ptr{mytype},), &t)
>
