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[stdlib] adjust assertion levels in UnsafeBufferPointer.extracting() #91514

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[stdlib] adjust assertion levels in UnsafeBufferPointer.extracting() #91514

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298748e
[stdlib] relax UnsafeBufferPointer.extracting()
glessard Aug 14, 2026
e66713c
[test] remove extraneous availability guards
glessard Aug 16, 2026
d64dee6
[test] skip a test case when stdlib assertions are enabled
glessard Aug 17, 2026
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3 changes: 2 additions & 1 deletion stdlib/public/core/UnsafeBufferPointer.swift.gyb
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Original file line number Diff line number Diff line change
Expand Up @@ -518,7 +518,7 @@ extension Unsafe${Mutable}BufferPointer where Element: ~Copyable {
@export(implementation)
@safe
public func extracting(_ bounds: Range<Int>) -> Self {
_precondition(_checkBounds(bounds), "Index out of range")
_debugPrecondition(_checkBounds(bounds), "Index out of range")
guard let start = self.baseAddress else {
return unsafe Self(start: nil, count: 0)
}
Expand Down Expand Up @@ -592,6 +592,7 @@ extension Unsafe${Mutable}BufferPointer where Element: ~Copyable {
/// - Returns: A new buffer pointer over the items at `bounds`.
@export(implementation)
public func extracting(unchecked bounds: Range<Int>) -> Self {
_internalInvariant(_checkBounds(bounds), "Index out of range")
let newStart = unsafe _position?.advanced(by: bounds.lowerBound)
return unsafe Self(start: newStart, count: bounds.count)
}
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3 changes: 2 additions & 1 deletion stdlib/public/core/UnsafeRawBufferPointer.swift.gyb
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Original file line number Diff line number Diff line change
Expand Up @@ -1222,7 +1222,7 @@ extension Unsafe${Mutable}RawBufferPointer {
@export(implementation)
@safe
public func extracting(_ bounds: Range<Int>) -> Self {
_precondition(_checkBounds(bounds), "Byte offset out of range")
_debugPrecondition(_checkBounds(bounds), "Byte offset out of range")
guard let start = baseAddress else {
return unsafe Self(_uncheckedStart: nil, count: 0)
}
Expand Down Expand Up @@ -1267,6 +1267,7 @@ extension Unsafe${Mutable}RawBufferPointer {
/// - Returns: A new buffer pointer over the bytes at `bounds`.
@export(implementation)
public func extracting(unchecked bounds: Range<Int>) -> Self {
_internalInvariant(_checkBounds(bounds), "Byte offset out of range")
let newStart = unsafe baseAddress?.advanced(by: bounds.lowerBound)
return unsafe Self(_uncheckedStart: newStart, count: bounds.count)
}
Expand Down