commit 7f4ccf7cf59d66c81b79eaf8f4d98fc3ae954df2
author Aaron Zinman <aaron@azinman.com> Tue Apr 05 10:55:19 2016 -0700
committer Benjamin Prosnitz <bprosnitz@google.com> Wed Apr 06 22:36:11 2016 +0000
tree ae23193bbb1d2db624e5ec87bf10819631f9d016
parent 4f920be61c24cc620d8a07dfadab83af9c7c2879

VDL codegen for Swift.

The codegen is largely complete. The following are missing:

- Generating const values for type Any
- vdl.Type support for VOM reflection/introspection
- TypeObject support, which requires vdl.Type
- Param support for Errors
- RPC support, which requires VOM.
- Proper integration with Xcode

Reach:
- A post-process code re-formatter to make the generated code have
  the correct spacing, etc.

Notes:
- Currently v23 won't compile until we have support for migrating
  away from v23's types that use reserved words in Swift. This
  will come in another CL.
- We don't support the fixed length VDL type explicitly -- instead
  that gets deferred to VOM. The reason is that Swift's type system
  cannot express a fixed length array, so we can only error at
  runtime. If we are to error at runtime, then we must either wrap
  arrays and monitor their length, or use getter/setters to monitor
  the length there, or enforce at VOM. The last option is currently
  preferrable as it allows for VDL generated code to be more idiomatic
  by directly using Arrays. This might change in the future.

MultiPart: 3/4
Change-Id: I6c5bdb65f15751e605d98863e5ecb89571344b80