[span] formulate Span.withUnsafeBytes() better

glessard · glessard · commit 88fb80fa92d1 · 2024-11-19T08:38:05.000-05:00
diff --git a/stdlib/public/core/Span/Span.swift b/stdlib/public/core/Span/Span.swift
@@ -703,7 +703,9 @@ extension Span where Element: BitwiseCopyable {
   public func withUnsafeBytes<E: Error, Result: ~Copyable>(
     _ body: (_ buffer: UnsafeRawBufferPointer) throws(E) -> Result
   ) throws(E) -> Result {
-    try RawSpan(_elements: self).withUnsafeBytes(body)
+    try body(
+      .init(start: _pointer, count: _count * MemoryLayout<Element>.stride)
+    )
   }
 }
 

Original file line number	Diff line number	Diff line change
`@@ -703,7 +703,9 @@ extension Span where Element: BitwiseCopyable {`
`703`	`703`	`public func withUnsafeBytes<E: Error, Result: ~Copyable>(`
`704`	`704`	`_ body: (_ buffer: UnsafeRawBufferPointer) throws(E) -> Result`
`705`	`705`	`) throws(E) -> Result {`
`706`		`- try RawSpan(_elements: self).withUnsafeBytes(body)`
	`706`	`+ try body(`
	`707`	`+ .init(start: _pointer, count: _count * MemoryLayout<Element>.stride)`
	`708`	`+ )`
`707`	`709`	`}`
`708`	`710`	`}`
`709`	`711`