[Localization] Switch diagnostics/localization to .strings format

include/swift/Localization/LocalizationFormat.h

@@ -27,8 +27,6 @@
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/OnDiskHashTable.h"
 #include "llvm/Support/StringSaver.h"
-#include "llvm/Support/YAMLParser.h"
-#include "llvm/Support/YAMLTraits.h"
 #include "llvm/Support/raw_ostream.h"
 #include <cstdint>
 #include <memory>
@@ -50,14 +48,14 @@ enum LocalizationProducerState : uint8_t {
   FailedInitialization
 };
 
-class DefToYAMLConverter {
+class DefToStringsConverter {
   llvm::ArrayRef<const char *> IDs;
   llvm::ArrayRef<const char *> Messages;
 
 public:
-  DefToYAMLConverter(llvm::ArrayRef<const char *> ids,
-                     llvm::ArrayRef<const char *> messages)
-      : IDs(ids), Messages(messages) {
+  DefToStringsConverter(llvm::ArrayRef<const char *> ids,
+                        llvm::ArrayRef<const char *> messages)
+    : IDs(ids), Messages(messages) {
     assert(IDs.size() == Messages.size());
   }
 
@@ -181,9 +179,9 @@ class LocalizationProducer {
                                        llvm::StringRef defaultMessage);
 
   /// \returns a `SerializedLocalizationProducer` pointer if the serialized
-  /// diagnostics file available, otherwise returns a `YAMLLocalizationProducer`
-  /// if the `YAML` file is available. If both files aren't available returns a
-  /// `nullptr`.
+  /// diagnostics file available, otherwise returns a
+  /// `StringsLocalizationProducer` if the `.strings` file is available. If both
+  /// files aren't available returns a `nullptr`.
   static std::unique_ptr<LocalizationProducer>
   producerFor(llvm::StringRef locale, llvm::StringRef path,
               bool printDiagnosticNames);
@@ -204,15 +202,15 @@ class LocalizationProducer {
   virtual llvm::StringRef getMessage(swift::DiagID id) const = 0;
 };
 
-class YAMLLocalizationProducer final : public LocalizationProducer {
-  std::vector<std::string> diagnostics;
+class StringsLocalizationProducer final : public LocalizationProducer {
   std::string filePath;
 
+  std::vector<std::string> diagnostics;
+
 public:
-  /// The diagnostics IDs that are no longer available in `.def`
-  std::vector<std::string> unknownIDs;
-  explicit YAMLLocalizationProducer(llvm::StringRef filePath,
-                                    bool printDiagnosticNames = false);
+  explicit StringsLocalizationProducer(llvm::StringRef filePath,
+                                       bool printDiagnosticNames = false)
+      : LocalizationProducer(printDiagnosticNames), filePath(filePath) {}
 
   /// Iterate over all of the available (non-empty) translations
   /// maintained by this producer, callback gets each translation
@@ -223,6 +221,10 @@ class YAMLLocalizationProducer final : public LocalizationProducer {
 protected:
   bool initializeImpl() override;
   llvm::StringRef getMessage(swift::DiagID id) const override;
+
+private:
+  static void readStringsFile(llvm::MemoryBuffer *in,
+                              std::vector<std::string> &diagnostics);
 };
 
 class SerializedLocalizationProducer final : public LocalizationProducer {
@@ -242,32 +244,6 @@ class SerializedLocalizationProducer final : public LocalizationProducer {
   llvm::StringRef getMessage(swift::DiagID id) const override;
 };
 
-class LocalizationInput : public llvm::yaml::Input {
-  using Input::Input;
-
-  /// Read diagnostics in the YAML file iteratively
-  template <typename T, typename Context>
-  friend typename std::enable_if<llvm::yaml::has_SequenceTraits<T>::value,
-                                 void>::type
-  readYAML(llvm::yaml::IO &io, T &Seq, T &unknownIDs, bool, Context &Ctx);
-
-  template <typename T>
-  friend typename std::enable_if<llvm::yaml::has_SequenceTraits<T>::value,
-                                 LocalizationInput &>::type
-  operator>>(LocalizationInput &yin, T &diagnostics);
-
-public:
-  /// A vector that keeps track of the diagnostics IDs that are available in
-  /// YAML and not available in `.def` files.
-  std::vector<std::string> unknownIDs;
-
-  /// A diagnostic ID might be present in YAML and not in `.def` file, if that's
-  /// the case the `id` won't have a `DiagID` value.
-  /// If the `id` is available in `.def` file this method will return the `id`'s
-  /// value, otherwise this method won't return a value.
-  static llvm::Optional<uint32_t> readID(llvm::yaml::IO &io);
-};
-
 } // namespace diag
 } // namespace swift
 

lib/ConstExtract/ConstExtract.cpp

@@ -21,6 +21,8 @@
 #include "swift/AST/TypeCheckRequests.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/JSON.h"
+#include "llvm/Support/YAMLParser.h"
+#include "llvm/Support/YAMLTraits.h"
 
 #include <set>
 #include <sstream>

lib/Frontend/CompilerInvocation.cpp

@@ -1450,7 +1450,7 @@ static bool ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
       // for the specified locale code.
       llvm::SmallString<128> localizationPath(A->getValue());
       llvm::sys::path::append(localizationPath, Opts.LocalizationCode);
-      llvm::sys::path::replace_extension(localizationPath, ".yaml");
+      llvm::sys::path::replace_extension(localizationPath, ".strings");
       if (!llvm::sys::fs::exists(localizationPath)) {
         Diags.diagnose(SourceLoc(), diag::warning_cannot_find_locale_file,
                        Opts.LocalizationCode, localizationPath);