stdlib: Resolve an un-mutated var warning.

tshortli · tshortli · commit ca925ab37960 · 2024-03-18T16:33:17.000-07:00
NFC.
diff --git a/stdlib/public/core/StringCreate.swift b/stdlib/public/core/StringCreate.swift
@@ -21,7 +21,6 @@ internal func _allASCII(_ input: UnsafeBufferPointer<UInt8>) -> Bool {
   //
   let count = input.count
   var ptr = UnsafeRawPointer(input.baseAddress._unsafelyUnwrappedUnchecked)
-  var i = 0
 
   let asciiMask64 = 0x8080_8080_8080_8080 as UInt64
   let asciiMask32 = UInt32(truncatingIfNeeded: asciiMask64)
@@ -63,7 +62,7 @@ internal func _allASCII(_ input: UnsafeBufferPointer<UInt8>) -> Bool {
   }
 
   if ptr < end {
-    let value = ptr.loadUnaligned(fromByteOffset: i, as: UInt8.self)
+    let value = ptr.loadUnaligned(fromByteOffset: 0, as: UInt8.self)
     guard value & asciiMask8 == 0 else { return false }
   }
   _internalInvariant(ptr == end || ptr + 1 == end)

Original file line number	Diff line number	Diff line change
`@@ -21,7 +21,6 @@ internal func _allASCII(_ input: UnsafeBufferPointer<UInt8>) -> Bool {`
`21`	`21`	`//`
`22`	`22`	`let count = input.count`
`23`	`23`	`var ptr = UnsafeRawPointer(input.baseAddress._unsafelyUnwrappedUnchecked)`
`24`		`- var i = 0`
`25`	`24`
`26`	`25`	`let asciiMask64 = 0x8080_8080_8080_8080 as UInt64`
`27`	`26`	`let asciiMask32 = UInt32(truncatingIfNeeded: asciiMask64)`
`@@ -63,7 +62,7 @@ internal func _allASCII(_ input: UnsafeBufferPointer<UInt8>) -> Bool {`
`63`	`62`	`}`
`64`	`63`
`65`	`64`	`if ptr < end {`
`66`		`- let value = ptr.loadUnaligned(fromByteOffset: i, as: UInt8.self)`
	`65`	`+ let value = ptr.loadUnaligned(fromByteOffset: 0, as: UInt8.self)`
`67`	`66`	`guard value & asciiMask8 == 0 else { return false }`
`68`	`67`	`}`
`69`	`68`	`_internalInvariant(ptr == end \|\| ptr + 1 == end)`