Merge pull request #430 from swiftwasm/master

[pull] swiftwasm from master

Author: kateinoigakukun

CHANGELOG.md

@@ -46,6 +46,19 @@ Swift Next
     // OK, <U where U: Equatable> has broader visibility than <T where T == Int>
     override func foo() where U: Equatable { ... } 
   }
+
+* [SR-75][]:
+
+  Unapplied references to protocol methods are now supported. Previously this
+  only worked for methods defined in structs, enums and classes.
+
+  ```swift
+  protocol Cat {
+    func play(catToy: Toy)
+  }
+
+  let fn = Cat.play(catToy:)
+  fn(myCat)(myToy)
   ```
 
 * [SE-0266][]:
@@ -7939,6 +7952,7 @@ Swift 1.0
 [SE-0267]: <https://github.com/apple/swift-evolution/blob/master/proposals/0267-where-on-contextually-generic.md>
 [SE-0269]: <https://github.com/apple/swift-evolution/blob/master/proposals/0269-implicit-self-explicit-capture.md>
 
+[SR-75]: <https://bugs.swift.org/browse/SR-75>
 [SR-106]: <https://bugs.swift.org/browse/SR-106>
 [SR-419]: <https://bugs.swift.org/browse/SR-419>
 [SR-631]: <https://bugs.swift.org/browse/SR-631>

docs/Lexicon.rst

@@ -299,7 +299,7 @@ source code, tests, and commit messages. See also the `LLVM lexicon`_.
         }
       }
 
-    `Outer` is the parent type of `Inner`.
+    ``Outer`` is the parent type of ``Inner``.
 
     Note that the terms "parent type" and "superclass" refer to completely
     different concepts.

include/swift/AST/SourceFile.h

@@ -194,6 +194,16 @@ class SourceFile final : public FileUnit {
   /// mechanism which is not SourceFile-dependent.)
   SeparatelyImportedOverlayMap separatelyImportedOverlays;
 
+  using SeparatelyImportedOverlayReverseMap =
+    llvm::SmallDenseMap<ModuleDecl *, ModuleDecl *>;
+
+  /// A lazily populated mapping from a separately imported overlay to its
+  /// underlying shadowed module.
+  ///
+  /// This is used by tooling to substitute the name of the underlying module
+  /// wherever the overlay's name would otherwise be reported.
+  SeparatelyImportedOverlayReverseMap separatelyImportedOverlaysReversed;
+
   /// A pointer to PersistentParserState with a function reference to its
   /// deleter to handle the fact that it's forward declared.
   using ParserStatePtr =
@@ -382,6 +392,7 @@ class SourceFile final : public FileUnit {
   /// \returns true if the overlay was added; false if it already existed.
   bool addSeparatelyImportedOverlay(ModuleDecl *overlay,
                                     ModuleDecl *declaring) {
+    separatelyImportedOverlaysReversed.clear();
     return std::get<1>(separatelyImportedOverlays[declaring].insert(overlay));
   }
 
@@ -399,6 +410,12 @@ class SourceFile final : public FileUnit {
     overlays.append(value.begin(), value.end());
   }
 
+  /// Retrieves a module shadowed by the provided separately imported overlay
+  /// \p shadowed. If such a module is returned, it should be presented to users
+  /// as owning the symbols in \p overlay.
+  ModuleDecl *
+  getModuleShadowedBySeparatelyImportedOverlay(const ModuleDecl *overlay);
+
   void cacheVisibleDecls(SmallVectorImpl<ValueDecl *> &&globals) const;
   const SmallVectorImpl<ValueDecl *> &getCachedVisibleDecls() const;
 

include/swift/Basic/LangOptions.h

@@ -296,6 +296,11 @@ namespace swift {
     /// incrementals parsing.
     bool BuildSyntaxTree = false;
 
+    /// Whether parsing is occurring for creation of syntax tree only, and no typechecking will occur after
+    /// parsing e.g. when parsing for SwiftSyntax. This is intended to affect parsing, e.g. disable
+    /// unnecessary name lookups that are not useful for pure syntactic parsing.
+    bool ParseForSyntaxTreeOnly = false;
+
     /// Whether to verify the parsed syntax tree and emit related diagnostics.
     bool VerifySyntaxTree = false;
 

include/swift/Basic/PathRemapper.h

@@ -39,7 +39,7 @@ class PathRemapper {
   /// Adds a mapping such that any paths starting with `FromPrefix` have that
   /// portion replaced with `ToPrefix`.
   void addMapping(StringRef FromPrefix, StringRef ToPrefix) {
-    PathMappings.emplace_back(FromPrefix, ToPrefix);
+    PathMappings.emplace_back(FromPrefix.str(), ToPrefix.str());
   }
 
   /// Returns a remapped `Path` if it starts with a prefix in the map; otherwise

include/swift/Frontend/PrintingDiagnosticConsumer.h

@@ -37,6 +37,9 @@ class PrintingDiagnosticConsumer : public DiagnosticConsumer {
   // implicitly associated with it. Uses `std::unique_ptr` so that
   // `AnnotatedSourceSnippet` can be forward declared.
   std::unique_ptr<AnnotatedSourceSnippet> currentSnippet;
+  // Educational notes which are buffered until the consumer is finished
+  // constructing a snippet.
+  SmallVector<std::string, 1> BufferedEducationalNotes;
 
 public:
   PrintingDiagnosticConsumer(llvm::raw_ostream &stream = llvm::errs());