* Throw error if user want to access message properties

* Fix typo

* Avoid direct check of class name

So that subclasses are also ok

* Use type hint in function signature.

use brew instead of easy_install in OSX (easy_install keep failing for a month)

Fix error in Clang UndefinedBehaviorSanitizer

Pointer Arguments to memcpy can not be null in UndefinedBehaviorSanitizer.
In this case, both the memory and the size was zero. This change allows
protoc to run under UndefinedBehaviorSanitizer.

Add mention to the "Build" section of the ReadMe of the requirement of installing an optional component to VS2017.

Fix MinGW build

Fix CMake build on Cygwin.

Make RepeatedField#delete_if consistent with Array#delete_if.

The class name was linked to the next word in the sentence.
"User\UserRequestis not found in descriptor pool."

Add a third-party RPC implementation: raster

* Fix memory leak of exceptions raised by RaiseException()

Currently exceptions raised by RaiseException() is never deallocated because:

* ARC is disabled for this library: https://github.com/google/protobuf/blob/master/BUILD#L913
* It is constructed with `+alloc` but is never `-release`d.

This change fixes the issue by using `-[NSException exceptionWithName:...]` instead, which returns an autoreleased instance, so it is deallocated properly.

* Fix format.

Add third-party RPC implementation: raster - a network framework supports pbrpc by 'service' keyword.

fixed typo

CMake: Update CXX Standard management

With this fix, Unity using IL2CPP should work with one of two
approaches:

- Call `FileDescriptor.ForceReflectionInitialization<T>` for every
  enum present in generated code (including oneof case enums)
- Ensure that IL2CPP uses the same code for int and any int-based
  enums

The former approach is likely to be simpler, unless IL2CPP changes
its default behavior. We *could* potentially generate the code
automatically, but that makes me slightly uncomfortable in terms of
generating code that's only relevant in one specific scenario. It
would be reasonably easy to write a tool (separate from protoc) to
generate the code required for any specific set of assemblies, so
that Unity users can include it in their application. We can always
decide to change to generate it automatically later.

Set ext.no_native = true for non mac platform

From:
https://github.com/rake-compiler/rake-compiler/issues/146#issuecomment-368539245

The tests can run as what Apple calls a Logic Test (under xctest), which means
it doesn't have to load an full UI App under the simulator, which speeds things
up a fair amount.

Fix benchmark build

* Edited MessageFieldGenerator to clone to backing field instead of property

* Generated C# proto code

Cleanup + documentation for Java Lite runtime.

Fixed a Visual Studio 2017 build error. (#4488)

fix java benchmark, fix dashboard build

The current 15.6.x versions of Visual Studio 2017 contain a bug that
prevent them from compiling the following construct under certain
conditions:

std::unique_ptr<std::unique_ptr<Foo> []> foos;

This will fail to compile if Foo is an abstract class. To work-around
the problem the whole construct was change into:

std::vector<std::unique_ptr<Foo>> foos;

This not only fixes the compiler error but is also more readable than
previous version.

Add gogo benchmark