withUnsafeMutableBytes(_:)
Calls a given closure with a raw pointer to the multiarray’s mutable storage.
Declaration
func withUnsafeMutableBytes<R>(_ body: (UnsafeMutableRawBufferPointer, [Int]) throws -> R) rethrows -> RParameters
- body:
A closure with an Unsafemutablerawbufferpointer parameter that points to the storage for the multiarray and its strides. This closure takes the following parameters:
ptrThe pointer to the buffer.
stridesThe strides of the buffer in scalars. Note that this may be different from
strides’s value prior to this method invocation.
Discussion
The buffer contains a collection of int32, float16, float32, or float64 values, depending on the multiarray’s data type. It may not store these scalar values contiguously; use strides to get the buffer layout.