* Some fixes to make the code work in google3.

* Removed plugin.h.

* Some more fixes to be namespace-independent.

* More fixes for namespace independence.

* A few final fixes.

* Another fix (hide ToUpper from Copybara).

* Fix for charp_unittest.

This change introduces a CriticalSectionLock class as a lightweight replacement for std::mutex on Windows platforms. std::mutex does not work on Windows XP SP2 with the latest VC++ libraries, because it utilizes the Concurrency Runtime that uses ::GetLogicalProcessorInformation which is only supported on Windows XP SP3 and above.

* Down integrate to github

Replaced shortn URL with intended URL.

* Revert "Revert "Fix Ruby module name generation when the ruby_package option is used (#5735)""

This reverts commit bb211e85.

* add new files to Makefile.am

This reverts commit 9638dcc3.

* fix module name generation and add tests

* fix existing tests

* support both package name styles

Signed-off-by: Xiang Dai <764524258@qq.com>

This reverts commit 6dcd8109.

This performance optimization allows to skip reflection (in the is() method) when the message has been already unpacked once

* Modify how end tags are encounted in merge code (compiler)

* Modify how end tags are encounted in merge code (generated)

* Modify how end tags are encounted in merge code (library)

* Regenerate generated code through generate_descriptor_proto.sh

* Modify how end tags are encounted in merge code (compiler)

* Modify how end tags are encounted in merge code (generated)

* Modify how end tags are encounted in merge code (library)

* Regenerate generated code through generate_descriptor_proto.sh

Document why no enum_extensibility is needed for Swift.

It already exists for wire and json formats

Fix below issue:
src/Makefile.am:210: warning: whitespace following trailing backslash
Signed-off-by: Xiang Dai <764524258@qq.com>

* Fix GetErrno() to be const noexcept

* Removed noexcept

Previously, internalAddGeneratedFile has to depend on old non-nested name for sub-messages.
This creates a hard dependency on old generated code for compatibility usage.
If user's code has custome error handler, the deprecation warning in the old generated code
will also be thrown (even though users haven't explicitly depended on the old message name).

To fix this problem, this change added an additional flag in the generated code to tell run
time that it's safe to use new message name. In this way, internalAddGeneratedFile can safely
depend on new name and don't trigger unnecessary deprecation warning.

This reverts commit b3367aee.

* Ruby nested msg caps

* nested types tests added

* test cases added for RubifyConstant

* extracted NestedMessage to TestNestedMessage

* removed nested tests with leading underscore

* extracted testLowercase to toplevel testLowercaseNested

Varadic assignment in javascript where the right hand expression is an
object yields a single set assignment with the right most lefthand variable,
while leaving the other left side expressions undefined.

For example:
var a,b = {}

will only initialize a to undefined. But will set b to the {} value.

--

For this code since f is never used, it is a safe operation to remove
it.

* Down-integrate internal changes to github.

* Fix BUILD file and regenerate csharp descritpor

* Down-integrate internal changes to github.

* fix csharp conformance test

* add comments in conformance.proto for text format

* fix comments

* fix comments, re-generated csharp file

* fix comments, re-generated csharp file

* Down-integrate internal changes to github.

* fix python conformance test

* fix csharp conformance test

* add back java map_lite_test.proto's optimize for option

* fix php conformance test

Recieved errors pasing json files with decimal floats from European colleagues

Some protos have enum values of "FOO" and "Foo", which the ObjC generation
then makes into the same thing. Just skip generating the enum element for
the duplicate as it would be a compile error because of the name collision.

The descriptors are still generated to support reflection and TextFormat
more completely.