The following playground reproduces an issue I'm having, in that the code won't
compile depending on the content of the closure. In fact, an empty closure is
fine, but when I try to call certain things, it's not.
I figure it has something to do with the type inference for inPointer, but I
can't figure out what it needs to work.
---------------------------
import Foundation
// OKAY:
var msg = Data(capacity: 123456)
msg.withUnsafeMutableBytes
{ (inPointer) -> Void in
foo(inPointer)
}
//error: cannot convert value of type '(_) -> Void' to expected argument type
'(UnsafeMutablePointer<_>) -> _'
//{ (inPointer) -> Void in
//^~~~~~~~~~~~~~~~~~~~~~~~
msg.withUnsafeMutableBytes
{ (inPointer) -> Void in
}
//error: cannot convert value of type '(_) -> Void' to expected argument type
'(UnsafeMutablePointer<_>) -> _'
//{ (inPointer) -> Void in
//^~~~~~~~~~~~~~~~~~~~~~~~
msg.withUnsafeMutableBytes
{ (inPointer) -> Void in
var s: Int
lgs_error(inPointer, 123456, &s)
}
func
foo(_ data: UnsafeMutableRawPointer!)
{
}
func
lgs_error(_ message: UnsafeMutablePointer<Int8>!,
_ message_capacity: Int,
_ message_size: UnsafeMutablePointer<Int>!) -> Int
{
}
---------------------------
--
Rick Mann
rm...@latencyzero.com
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