commit 8397a87e40fac7febe6b6d5085842e6beae7a034
author André Pang <apang@google.com> Tue Jan 21 05:24:11 2020 +0000
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> Tue Jan 21 05:24:11 2020 +0000
tree 6c8f03f35ff3cf26395be14ad724babb8e9a5ef3
parent 7ad0bb107267ba355b4479837bd7494904075148

[fidlc] Reland "Allow flexible/strict modifiers for unions"

This is a reland of bf2ff3266e4ff5e1981426a1aa4a7904c63e378e without the
fidlgen changes since the topaz goldens need to be updated for the tests
to pass. We'll do that out in a future CL.

Original change's description:
> [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

Change-Id: I25e4eb63cc1db878c5385bb6e249b013b54a7150