Added -Wextra-semi to Clang build.

Also fixed warnings this generated.

Change-Id: If3607907b2dd609f854b7b81225d9cf66af75a60

CMakeLists.txt

@@ -193,7 +193,7 @@ elseif(${CMAKE_CXX_COMPILER_ID} MATCHES "Clang")
       "${CMAKE_CXX_FLAGS} -std=c++0x -Wall -pedantic -Werror -Wextra -Wno-unused-parameter")
   set(FLATBUFFERS_PRIVATE_CXX_FLAGS "-Wold-style-cast")
   if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.8)
-    list(APPEND FLATBUFFERS_PRIVATE_CXX_FLAGS "-Wimplicit-fallthrough" "-Werror=unused-private-field") # enable warning
+    list(APPEND FLATBUFFERS_PRIVATE_CXX_FLAGS "-Wimplicit-fallthrough" "-Wextra-semi" "-Werror=unused-private-field") # enable warning
   endif()
   if(FLATBUFFERS_LIBCXX_WITH_CLANG)
     if(NOT "${CMAKE_SYSTEM_NAME}" MATCHES "Linux")

include/flatbuffers/code_generators.h

@@ -132,7 +132,7 @@ extern void GenComment(const std::vector<std::string> &dc,
 
 class FloatConstantGenerator {
  public:
-  virtual ~FloatConstantGenerator(){};
+  virtual ~FloatConstantGenerator() {}
   std::string GenFloatConstant(const FieldDef &field) const;
 
  private:

include/flatbuffers/idl.h

@@ -329,7 +329,7 @@ inline size_t InlineAlignment(const Type &type) {
 
 struct EnumVal {
   EnumVal(const std::string &_name, int64_t _val) : name(_name), value(_val) {}
-  EnumVal() : value(0){};
+  EnumVal() : value(0) {}
 
   Offset<reflection::EnumVal> Serialize(FlatBufferBuilder *builder, const Parser &parser) const;
 

src/idl_gen_cpp.cpp

@@ -2169,7 +2169,7 @@ class CppGenerator : public BaseGenerator {
         break;
       }
     }
-  };
+  }
 
   std::string GenUnpackFieldStatement(const FieldDef &field,
                                       const FieldDef *union_field) {

src/idl_gen_dart.cpp

@@ -55,7 +55,7 @@ class DartGenerator : public BaseGenerator {
 
   DartGenerator(const Parser &parser, const std::string &path,
                 const std::string &file_name)
-      : BaseGenerator(parser, path, file_name, "", "."){};
+      : BaseGenerator(parser, path, file_name, "", ".") {}
   // Iterate through all definitions we haven't generate code for (enums,
   // structs, and tables) and output them to a single file.
   bool generate() {

src/idl_gen_grpc.cpp

@@ -113,12 +113,12 @@ class FlatBufService : public grpc_generator::Service {
 
   int method_count() const {
     return static_cast<int>(service_->calls.vec.size());
-  };
+  }
 
   std::unique_ptr<const grpc_generator::Method> method(int i) const {
     return std::unique_ptr<const grpc_generator::Method>(
         new FlatBufMethod(service_->calls.vec[i]));
-  };
+  }
 
  private:
   const ServiceDef *service_;
@@ -235,7 +235,7 @@ class FlatBufFile : public grpc_generator::File {
 
   int service_count() const {
     return static_cast<int>(parser_.services_.vec.size());
-  };
+  }
 
   std::unique_ptr<const grpc_generator::Service> service(int i) const {
     return std::unique_ptr<const grpc_generator::Service>(

src/idl_gen_js_ts.cpp

@@ -79,7 +79,7 @@ class JsTsGenerator : public BaseGenerator {
   JsTsGenerator(const Parser &parser, const std::string &path,
                 const std::string &file_name)
       : BaseGenerator(parser, path, file_name, "", "."),
-        lang_(GetJsLangParams(parser_.opts.lang)){};
+        lang_(GetJsLangParams(parser_.opts.lang)) {}
   // Iterate through all definitions we haven't generate code for (enums,
   // structs, and tables) and output them to a single file.
   bool generate() {

src/idl_gen_php.cpp

@@ -31,7 +31,7 @@ class PhpGenerator : public BaseGenerator {
  public:
   PhpGenerator(const Parser &parser, const std::string &path,
                const std::string &file_name)
-      : BaseGenerator(parser, path, file_name, "\\", "\\"){};
+      : BaseGenerator(parser, path, file_name, "\\", "\\") {}
   bool generate() {
     if (!GenerateEnums()) return false;
     if (!GenerateStructs()) return false;