Contents

update(_:)

Updates the buffer resource in place synchronously on the CPU.

Declaration

final func update<R, E>(_ body: @_lifetime(0: copy 0) (inout MutableRawSpan) throws(E) -> R) throws(E) -> R where E : Error, R : ~Copyable

Parameters

  • body:

    A closure that receives a mutable span over the buffer’s bytes for in-place modification.

Discussion

You pass a closure that receives a mutable span representing the contents of the buffer resource, which the closure may modify. This span is valid only for the duration of the closure.