commit bf2ff3266e4ff5e1981426a1aa4a7904c63e378e
author André Pang <apang@google.com> Fri Jan 17 20:04:46 2020 +0000
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> Fri Jan 17 20:04:46 2020 +0000
tree 21d7c81c210d6cf342dc036b09159b660eb1e31d
parent d6bbaa130aadcf29df7baef63d80f596ebc4e2fd

[fidl] Allow flexible/strict modifiers for unions

1. Rename "experimental_flexible" to just "flexible". This is required
   for removing the "xunion" keyword, which will be replaced by
   "flexible union" instead.

2. Add strictness information to unions in fidlc, and emit a "strict"
   field in the JSON IR similarly to xunions. (Note that "union"
   defaults to strict, while "xunion" defaults to flexible.)

3. Update fidlgen's IR in types.go to carry strictness information, and
   plumb the union strictness through when unions are converted to
   xunions.

4. Update grammar.md to include both strict & flexible as legal tokens.

Test: fx run-host-tests fidl-compiler-test
Test: (goldens)

Change-Id: I83591bdb3f5594baedc0327adb562f263fa77d79