[Qemu-devel] [PATCH RFC 0/5] qapi: support anonymous inline base

[Eric Blake <eblake@redhat.com>]

Existing flat unions have to specify a separate base class:

{ 'struct':'Base', 'data': { common... } }
{ 'union':'Flat', 'base': 'Base', 'discriminator':... }

but we often don't care about reusing the base member by itself.
Since we already support anonymous structs for commands, it is
not that much harder to do likewise for the common members of
the flat union:

{ 'union':'Flat', 'base': { common... }, 'discriminator':... }

And, as usual, it cleans up other things as prerequisites.

RFC because it depends on two pending series:
https://lists.gnu.org/archive/html/qemu-devel/2015-08/msg00426.html
https://lists.gnu.org/archive/html/qemu-devel/2015-08/msg02059.html

Eric Blake (5):
  qapi: Reuse code for flat union base validation
  qapi: Generate consistent variable names
  qapi: Merge generation of per-member visits
  qapi: Simplify visits of optional fields
  qapi: Allow anonymous base for flat union

 include/qapi/visitor-impl.h                 |  3 +-
 include/qapi/visitor.h                      |  5 +-
 qapi/opts-visitor.c                         |  2 +-
 qapi/qapi-visit-core.c                      |  6 +-
 qapi/qmp-input-visitor.c                    |  3 +-
 qapi/string-input-visitor.c                 |  3 +-
 scripts/qapi-commands.py                    | 57 ++++-------------
 scripts/qapi-event.py                       | 22 +++----
 scripts/qapi-types.py                       |  2 +-
 scripts/qapi-visit.py                       | 99 ++++++++++++-----------------
 scripts/qapi.py                             | 78 ++++++++++++++++++-----
 tests/Makefile                              |  3 +-
 tests/qapi-schema/flat-union-bad-base.err   |  1 -
 tests/qapi-schema/flat-union-bad-base.exit  |  1 -
 tests/qapi-schema/flat-union-bad-base.json  | 13 ----
 tests/qapi-schema/flat-union-bad-base.out   |  0
 tests/qapi-schema/flat-union-base-any.err   |  2 +-
 tests/qapi-schema/flat-union-base-union.err |  2 +-
 tests/qapi-schema/flat-union-inline.err     |  2 +-
 tests/qapi-schema/flat-union-inline.json    |  4 +-
 tests/qapi-schema/flat-union-no-base.err    |  2 +-
 tests/qapi-schema/qapi-schema-test.json     |  2 +-
 tests/qapi-schema/qapi-schema-test.out      |  5 +-
 tests/qapi-schema/union-invalid-base.err    |  2 +-
 24 files changed, 149 insertions(+), 170 deletions(-)
 delete mode 100644 tests/qapi-schema/flat-union-bad-base.err
 delete mode 100644 tests/qapi-schema/flat-union-bad-base.exit
 delete mode 100644 tests/qapi-schema/flat-union-bad-base.json
 delete mode 100644 tests/qapi-schema/flat-union-bad-base.out

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2.4.3