---

yaml
---
r: 348826
b: refs/heads/master
c: cb3f9e6
h: refs/heads/master

Author: CodaFi

[refs]

@@ -1,5 +1,5 @@
 ---
-refs/heads/master: d7e977bf68e95201f4c1a11493f650a2c5339f06
+refs/heads/master: cb3f9e6e845a672c95c139e5604f0273b20eedf4
 refs/heads/master-next: 203b3026584ecad859eb328b2e12490099409cd5
 refs/tags/osx-passed: b6b74147ef8a386f532cf9357a1bde006e552c54
 refs/tags/swift-2.2-SNAPSHOT-2015-12-01-a: 6bb18e013c2284f2b45f5f84f2df2887dc0f7dea

trunk/CHANGELOG.md

@@ -4,31 +4,143 @@ CHANGELOG
 <details>
 <summary>Note: This is in reverse chronological order, so newer entries are added to the top.</summary>
 
-| Contents               |
-| :--------------------- |
-| [Swift Next](#swift-next) |
-| [Swift 5.1](#swift-51) |
-| [Swift 5.0](#swift-50) |
-| [Swift 4.2](#swift-42) |
-| [Swift 4.1](#swift-41) |
-| [Swift 4.0](#swift-40) |
-| [Swift 3.1](#swift-31) |
-| [Swift 3.0](#swift-30) |
-| [Swift 2.2](#swift-22) |
-| [Swift 2.1](#swift-21) |
-| [Swift 2.0](#swift-20) |
-| [Swift 1.2](#swift-12) |
-| [Swift 1.1](#swift-11) |
-| [Swift 1.0](#swift-10) |
+| Version                | Released   | Toolchain   |
+| :--------------------- | :--------- | :---------- |
+| [Swift 5.2](#swift-52) |            |             |
+| [Swift 5.1](#swift-51) | 2019-09-20 | Xcode 11.0  |
+| [Swift 5.0](#swift-50) | 2019-03-25 | Xcode 10.2  |
+| [Swift 4.2](#swift-42) | 2018-09-17 | Xcode 10.0  |
+| [Swift 4.1](#swift-41) | 2018-03-29 | Xcode 9.3   |
+| [Swift 4.0](#swift-40) | 2017-09-19 | Xcode 9.0   |
+| [Swift 3.1](#swift-31) | 2017-03-27 | Xcode 8.3   |
+| [Swift 3.0](#swift-30) | 2016-09-13 | Xcode 8.0   |
+| [Swift 2.2](#swift-22) | 2016-03-21 | Xcode 7.3   |
+| [Swift 2.1](#swift-21) | 2015-10-21 | Xcode 7.1   |
+| [Swift 2.0](#swift-20) | 2015-09-17 | Xcode 7.0   |
+| [Swift 1.2](#swift-12) | 2015-04-08 | Xcode 6.3   |
+| [Swift 1.1](#swift-11) | 2014-12-02 | Xcode 6.1.1 |
+| [Swift 1.0](#swift-10) | 2014-09-15 | Xcode 6.0   |
 
 </details>
 
-Swift Next
-----------
+Swift 5.2
+---------
+
+* [SR-11429][]:
+
+  The compiler will now correctly strip argument labels from function references
+  used with the `as` operator in a function call. As a result, the `as` operator
+  can now be used to disambiguate a call to a function with argument labels. 
+  
+  ```swift
+  func foo(x: Int) {}
+  func foo(x: UInt) {}
+  
+  (foo as (Int) -> Void)(5)  // Calls foo(x: Int)
+  (foo as (UInt) -> Void)(5) // Calls foo(x: UInt)
+  ```
+  
+  Previously this was only possible for functions without argument labels.
+  
+  This change also means that a generic type alias can no longer be used to
+  preserve the argument labels of a function reference through the `as`
+  operator. The following is now rejected:
+  
+  ```swift
+  typealias Magic<T> = T
+  func foo(x: Int) {}
+  (foo as Magic)(x: 5) // error: Extraneous argument label 'x:' in call
+  ```
+  
+  The function value must instead be called without argument labels:
+  
+  ```swift
+  (foo as Magic)(5)
+  ```
+
+* [SR-11298][]:
+
+  A class-constrained protocol extension, where the extended protocol does
+  not impose a class constraint, will now infer the constraint implicitly.
+
+  ```swift
+  protocol Foo {}
+  class Bar: Foo {
+    var someProperty: Int = 0
+  }
+
+  // Even though 'Foo' does not impose a class constraint, it is automatically
+  // inferred due to the Self: Bar constraint.
+  extension Foo where Self: Bar {
+    var anotherProperty: Int {
+      get { return someProperty }
+      // As a result, the setter is now implicitly nonmutating, just like it would
+      // be if 'Foo' had a class constraint.
+      set { someProperty = newValue }
+    }
+  }
+  ```
+  
+  As a result, this could lead to code that currently compiles today to throw an error.
+  
+  ```swift
+  protocol Foo {
+    var someProperty: Int { get set }
+  }
+  
+  class Bar: Foo {
+    var someProperty = 0
+  }
+  
+  extension Foo where Self: Bar {
+    var anotherProperty1: Int {
+      get { return someProperty }
+      // This will now error, because the protocol requirement
+      // is implicitly mutating and the setter is implicitly 
+      // nonmutating.
+      set { someProperty = newValue } // Error
+    }
+  }
+  ```
+
+  **Workaround**: Define a new mutable variable inside the setter that has a reference to `self`:
+  
+  ```swift
+  var anotherProperty1: Int {
+    get { return someProperty }
+    set {
+      var mutableSelf = self
+      mutableSelf.someProperty = newValue // Okay
+    }
+  }
+  ```
+
+* [SE-0253][]:
+
+  Values of types that declare `func callAsFunction` methods can be called
+  like functions. The call syntax is shorthand for applying
+  `func callAsFunction` methods.
+
+  ```swift
+  struct Adder {
+    var base: Int
+    func callAsFunction(_ x: Int) -> Int {
+      return x + base
+    }
+  }
+  var adder = Adder(base: 3)
+  adder(10) // returns 13, same as `adder.callAsFunction(10)`
+  ```
+
+  * `func callAsFunction` argument labels are required at call sites.
+  * Multiple `func callAsFunction` methods on a single type are supported.
+  * `mutating func callAsFunction` is supported.
+  * `func callAsFunction` works with `throws` and `rethrows`.
+  * `func callAsFunction` works with trailing closures.
 
 * [SR-4206][]:
 
-  A method override is no longer allowed to have a generic signature with 
+  A method override is no longer allowed to have a generic signature with
   requirements not imposed by the base method. For example:
 
   ```
@@ -65,6 +177,8 @@ Swift Next
 Swift 5.1
 ---------
 
+### 2019-09-20 (Xcode 11.0)
+
 * [SR-8974][]:
 
   Duplicate tuple element labels are no longer allowed, because it leads
@@ -7711,6 +7825,7 @@ Swift 1.0
 [SE-0244]: <https://github.com/apple/swift-evolution/blob/master/proposals/0244-opaque-result-types.md>
 [SE-0245]: <https://github.com/apple/swift-evolution/blob/master/proposals/0245-array-uninitialized-initializer.md>
 [SE-0252]: <https://github.com/apple/swift-evolution/blob/master/proposals/0252-keypath-dynamic-member-lookup.md>
+[SE-0253]: <https://github.com/apple/swift-evolution/blob/master/proposals/0253-callable.md>
 [SE-0254]: <https://github.com/apple/swift-evolution/blob/master/proposals/0254-static-subscripts.md>
 
 [SR-106]: <https://bugs.swift.org/browse/SR-106>
@@ -7741,3 +7856,5 @@ Swift 1.0
 [SR-8974]: <https://bugs.swift.org/browse/SR-8974>
 [SR-9043]: <https://bugs.swift.org/browse/SR-9043>
 [SR-9827]: <https://bugs.swift.org/browse/SR-9827>
+[SR-11298]: <https://bugs.swift.org/browse/SR-11298>
+[SR-11429]: <https://bugs.swift.org/browse/SR-11429>

trunk/CMakeLists.txt

@@ -125,7 +125,7 @@ set(SWIFT_ANALYZE_CODE_COVERAGE FALSE CACHE STRING
 # SWIFT_VERSION is deliberately /not/ cached so that an existing build directory
 # can be reused when a new version of Swift comes out (assuming the user hasn't
 # manually set it as part of their own CMake configuration).
-set(SWIFT_VERSION "5.1")
+set(SWIFT_VERSION "5.1.1")
 
 set(SWIFT_VENDOR "" CACHE STRING
     "The vendor name of the Swift compiler")
@@ -219,7 +219,7 @@ set(SWIFT_NATIVE_CLANG_TOOLS_PATH "" CACHE STRING
 set(SWIFT_NATIVE_SWIFT_TOOLS_PATH "" CACHE STRING
    "Path to the directory that contains Swift tools that are executable on the build machine")
 
-option(SWIFT_ENABLE_PARSEABLE_MODULE_INTERFACES
+option(SWIFT_ENABLE_MODULE_INTERFACES
        "Generate .swiftinterface files alongside .swiftmodule files"
        TRUE)
 
@@ -996,6 +996,7 @@ if(SWIFT_NEED_EXPLICIT_LIBDISPATCH)
                         -DCMAKE_CXX_COMPILER=${SWIFT_LIBDISPATCH_CXX_COMPILER}
                         -DCMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS}
                         -DCMAKE_MAKE_PROGRAM=${CMAKE_MAKE_PROGRAM}
+                        -DCMAKE_INSTALL_LIBDIR=lib
                         -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>
                         -DCMAKE_LINKER=${CMAKE_LINKER}
                         -DCMAKE_RANLIB=${CMAKE_RANLIB}

trunk/README.md

@@ -6,27 +6,26 @@
 | | **Architecture** | **Master** | **Package** |
 |---|:---:|:---:|:---:|
 | **macOS**        | x86_64 |[![Build Status](https://ci.swift.org/job/oss-swift-incremental-RA-osx/lastCompletedBuild/badge/icon)](https://ci.swift.org/job/oss-swift-incremental-RA-osx)|[![Build Status](https://ci.swift.org/job/oss-swift-package-osx/lastCompletedBuild/badge/icon)](https://ci.swift.org/job/oss-swift-package-osx)|
-| **Ubuntu 14.04** | x86_64 | [![Build Status](https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-14_04/lastCompletedBuild/badge/icon)](https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-14_04)|[![Build Status](https://ci.swift.org/job/oss-swift-package-linux-ubuntu-14_04/lastCompletedBuild/badge/icon)](https://ci.swift.org/job/oss-swift-package-linux-ubuntu-14_04)|
 | **Ubuntu 16.04** | x86_64 | [![Build Status](https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-16_04/lastCompletedBuild/badge/icon)](https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-16_04)|[![Build Status](https://ci.swift.org/job/oss-swift-package-linux-ubuntu-16_04/lastCompletedBuild/badge/icon)](https://ci.swift.org/job/oss-swift-package-linux-ubuntu-16_04)|
 | **Ubuntu 18.04** | x86_64 | [![Build Status](https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-18_04/lastCompletedBuild/badge/icon)](https://ci.swift.org/job/oss-swift-incremental-RA-linux-ubuntu-18_04)|[![Build Status](https://ci.swift.org/job/oss-swift-package-linux-ubuntu-18_04/lastCompletedBuild/badge/icon)](https://ci.swift.org/job/oss-swift-package-linux-ubuntu-18_04)|
 
 **Swift Community-Hosted CI Platforms**
 
 | **OS** | **Architecture** | **Build** |
 |---|:---:|:---:|
-|**[Debian 9.1 (Raspberry Pi)](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/armv7_debian_stretch.json)** | ARMv7 | [![Build Status](https://ci-external.swift.org/job/oss-swift-RA-linux-debian-9_1/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-linux-debian-9_1)|
-|**[Fedora 27](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/x86_64_fedora_27.json)** | x86_64 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-linux-fedora-27/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-linux-fedora-27)|
-|**[Ubuntu 16.04](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/x86_64_ubuntu_16_04.json)** | x86_64 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04)|
 |**[Ubuntu 16.04 ](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/ppc64le_ubuntu_16_04.json)** | PPC64LE |[![Build Status](https://ci-external.swift.org/job/oss-swift-5.1-RA-linux-ubuntu-16.04-ppc64le/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-5.1-RA-linux-ubuntu-16.04-ppc64le)|
 |**[Ubuntu 16.04 ](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/aarch64_ubuntu_16.04.json)** | AArch64 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-aarch64/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-aarch64)|
 |**[Android](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/x86_64_ubuntu_16_04_LTS_android.json)** | ARMv7 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-android/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-android)|
 |**[Android](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/x86_64_ubuntu_16_04_LTS_android.json)** | AArch64 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-android-arm64/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-android-arm64)|
-|**[Ubuntu 16.04 (TensorFlow)](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/x86_64_ubuntu_16_04_tensorflow.json)** | x86_64 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-tensorflow/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-tensorflow)|
-|**[macOS 10.13 (TensorFlow)](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/x86_64_macos_high_sierra_tensorflow.json)** | x86_64 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-macOS-tensorflow/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-macOS-tensorflow)|
-|**[Ubuntu 16.04 (TensorFlow with GPU)](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/x86_64_ubuntu_16_04_tensorflow_gpu.json)** | x86_64 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-tensorflow-gpu/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-tensorflow-gpu)|
-|**[Debian 9.5](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/x86_64_debian_9.5.json)** | x86_64 | [![Build Status](https://ci-external.swift.org/job/oss-swift-RA-linux-debian-9_5/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-linux-debian-9_5)|
 |**[Windows 2019](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/x86_64_windows_2019.json)** | x86_64 | [![Build Status](https://ci-external.swift.org/job/oss-swift-windows-x86_64/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-windows-x86_64)|
 
+**Swift TensorFlow Community-Hosted CI Platforms**
+
+| **OS** | **Architecture** | **Build** |
+|---|:---:|:---:|
+|**[Ubuntu 16.04](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/x86_64_ubuntu_16_04_tensorflow.json)** | x86_64 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-tensorflow/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-tensorflow)|
+|**[macOS 10.13](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/x86_64_macos_high_sierra_tensorflow.json)** | x86_64 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-macOS-tensorflow/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-macOS-tensorflow)|
+|**[Ubuntu 16.04 (GPU)](https://github.com/apple/swift-community-hosted-continuous-integration/blob/master/nodes/x86_64_ubuntu_16_04_tensorflow_gpu.json)** | x86_64 |[![Build Status](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-tensorflow-gpu/lastCompletedBuild/badge/icon)](https://ci-external.swift.org/job/oss-swift-RA-linux-ubuntu-16.04-tensorflow-gpu)|
 
 ## Welcome to Swift
 

trunk/benchmark/CMakeLists.txt

@@ -87,6 +87,7 @@ set(SWIFT_BENCH_MODULES
     single-source/Exclusivity
     single-source/ExistentialPerformance
     single-source/Fibonacci
+    single-source/FindStringNaive
     single-source/FlattenList
     single-source/FloatingPointParsing
     single-source/FloatingPointPrinting
@@ -130,6 +131,7 @@ set(SWIFT_BENCH_MODULES
     single-source/Prefix
     single-source/PrefixWhile
     single-source/Prims
+    single-source/PrimsNonStrongRef
     single-source/ProtocolDispatch
     single-source/ProtocolDispatch2
     single-source/Queue