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4fa7e136e9
To guard the new UnsafeMutablePointer.mutableSpan APIs.
This allows older compilers to ignore the new APIs. Otherwise, the type checker
will crash on the synthesized _read accessor for a non-Escapable type:
error: cannot infer lifetime dependence on the '_read' accessor because 'self'
is BitwiseCopyable, specify '@lifetime(borrow self)'
I don't know why the _read is synthesized in these cases, but apparently it's
always been that way.
Fixes: rdar://153773093 ([nonescapable] add a compiler feature to guard
~Escapable accessors when self is trivial)
(cherry picked from commit cc357f4f32)
55 lines
2.6 KiB
Swift
55 lines
2.6 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: %target-swift-frontend -swift-version 5 -enable-library-evolution -emit-module \
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// RUN: -enable-experimental-feature LifetimeDependence \
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// RUN: -suppress-warnings \
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// RUN: -o %t/lifetime_dependence.swiftmodule \
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// RUN: -emit-module-interface-path %t/lifetime_dependence.swiftinterface \
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// RUN: %S/Inputs/lifetime_dependence.swift
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// Check the interfaces
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// RUN: %FileCheck %s < %t/lifetime_dependence.swiftinterface
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// See if we can compile a module through just the interface and typecheck using it.
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// RUN: %target-swift-frontend -compile-module-from-interface \
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// RUN: -enable-experimental-feature LifetimeDependence \
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// RUN: %t/lifetime_dependence.swiftinterface -o %t/lifetime_dependence.swiftmodule
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// RUN: %target-swift-frontend -typecheck -I %t %s \
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// RUN: -enable-experimental-feature LifetimeDependence
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// REQUIRES: swift_feature_LifetimeDependence
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import lifetime_dependence
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// CHECK: @lifetime(borrow a)
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// CHECK-NEXT: @inlinable internal init(_ ptr: Swift.UnsafeRawBufferPointer, _ a: borrowing Swift.Array<Swift.Int>) {
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// CHECK: @lifetime(copy a)
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// CHECK-NEXT: @inlinable internal init(_ ptr: Swift.UnsafeRawBufferPointer, _ a: consuming lifetime_dependence.AnotherView) {
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// CHECK: @lifetime(copy x)
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// CHECK-NEXT: @inlinable public func derive(_ x: consuming lifetime_dependence.BufferView) -> lifetime_dependence.BufferView {
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// CHECK: @lifetime(copy view)
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// CHECK-NEXT: @inlinable public func consumeAndCreate(_ view: consuming lifetime_dependence.BufferView) -> lifetime_dependence.BufferView {
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// CHECK: @lifetime(copy this, copy that)
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// CHECK-NEXT: @inlinable public func deriveThisOrThat(_ this: consuming lifetime_dependence.BufferView, _ that: consuming lifetime_dependence.BufferView) -> lifetime_dependence.BufferView {
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// Check that an implicitly dependent variable accessor is guarded by LifetimeDependence.
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//
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// CHECK: extension lifetime_dependence.Container {
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// CHECK-NEXT: #if compiler(>=5.3) && $NonescapableTypes && $LifetimeDependence
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// CHECK-NEXT: public var storage: lifetime_dependence.BufferView {
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// CHECK-LABEL: extension Swift.UnsafeMutableBufferPointer where Element : ~Copyable {
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// CHECK: #if compiler(>=5.3) && $LifetimeDependence
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// CHECK: public var span: Swift.Span<Element> {
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// CHECK: @lifetime(borrow self)
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// CHECK: @_alwaysEmitIntoClient get {
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// CHECK: #if compiler(>=5.3) && $LifetimeDependence && $NonescapableAccessorOnTrivial
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// CHECK: public var mutableSpan: Swift.MutableSpan<Element> {
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// CHECK: @lifetime(borrow self)
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// CHECK: @_alwaysEmitIntoClient get {
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