[Tooling] Move CompilationDatabasePlugin to the Registry header, where it's useful. NFC

llvm-svn: 344247

clang/include/clang/Tooling/CompilationDatabase.h

@@ -141,27 +141,6 @@ public:
   virtual std::vector<CompileCommand> getAllCompileCommands() const;
 };
 
-/// Interface for compilation database plugins.
-///
-/// A compilation database plugin allows the user to register custom compilation
-/// databases that are picked up as compilation database if the corresponding
-/// library is linked in. To register a plugin, declare a static variable like:
-///
-/// \code
-/// static CompilationDatabasePluginRegistry::Add<MyDatabasePlugin>
-/// X("my-compilation-database", "Reads my own compilation database");
-/// \endcode
-class CompilationDatabasePlugin {
-public:
-  virtual ~CompilationDatabasePlugin();
-
-  /// Loads a compilation database from a build directory.
-  ///
-  /// \see CompilationDatabase::loadFromDirectory().
-  virtual std::unique_ptr<CompilationDatabase>
-  loadFromDirectory(StringRef Directory, std::string &ErrorMessage) = 0;
-};
-
 /// A compilation database that returns a single compile command line.
 ///
 /// Useful when we want a tool to behave more like a compiler invocation.

clang/include/clang/Tooling/CompilationDatabasePluginRegistry.h

@@ -16,6 +16,27 @@
 namespace clang {
 namespace tooling {
 
+/// Interface for compilation database plugins.
+///
+/// A compilation database plugin allows the user to register custom compilation
+/// databases that are picked up as compilation database if the corresponding
+/// library is linked in. To register a plugin, declare a static variable like:
+///
+/// \code
+/// static CompilationDatabasePluginRegistry::Add<MyDatabasePlugin>
+/// X("my-compilation-database", "Reads my own compilation database");
+/// \endcode
+class CompilationDatabasePlugin {
+public:
+  virtual ~CompilationDatabasePlugin();
+
+  /// Loads a compilation database from a build directory.
+  ///
+  /// \see CompilationDatabase::loadFromDirectory().
+  virtual std::unique_ptr<CompilationDatabase>
+  loadFromDirectory(StringRef Directory, std::string &ErrorMessage) = 0;
+};
+
 using CompilationDatabasePluginRegistry =
     llvm::Registry<CompilationDatabasePlugin>;