[PATCH v4 0/9] qapi: untie 'if' conditions from C preprocessor

[marcandre.lureau@redhat.com]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Hi,

This series makes the 'if' conditions less liberal, by formalizing a simple
expression tree based on bare boolean logic of configure option identifiers.

(this allows to express conditions in Rust in my QAPI-Rust PoC series)

thanks

v4:
 - keep gen_if/gen_endif in common.py, reducing C codegen in schema.py
 - raise NotImplemented instead of False for unhandled __eq__
 - change check_if() to keep the json/raw form, add _make_if() to build a
   QAPISchemaIfCond
 - improve __repr__ usage
 - drop ABC usage
 - tweaks here and there
 - add various commit tags

v3:
 - rebasing on queued pt4 (after waiting for it to land)
 - improve documentation generation, to be more human-friendly
 - drop typing annotations from schema.py (not yet queued)
 - commit message tweaks

v2:
 - fix the normalization step to handle recursive expr
 - replace IfCond by QAPISchemaIf (JohnS)
 - commit message and documentation tweaks
 - mypy/flake8/isort

Marc-André Lureau (9):
  qapi: replace List[str] by QAPISchemaIfCond
  qapi: make gen_if/gen_endif take a simple string
  qapi: start building an 'if' predicate tree
  qapi: introduce IfPredicateList and IfAny
  qapi: add IfNot
  qapi: normalize 'if' condition to IfPredicate tree
  qapi: convert 'if' C-expressions to the new syntax tree
  qapi: make 'if' condition strings simple identifiers
  docs: update the documentation about schema configuration

 docs/devel/qapi-code-gen.txt                  |  33 ++---
 docs/sphinx/qapidoc.py                        |   6 +-
 qapi/block-core.json                          |  16 +--
 qapi/block-export.json                        |   6 +-
 qapi/char.json                                |   8 +-
 qapi/machine-target.json                      |  28 +++--
 qapi/migration.json                           |  10 +-
 qapi/misc-target.json                         |  36 ++++--
 qapi/qom.json                                 |  10 +-
 qapi/sockets.json                             |   4 +-
 qapi/ui.json                                  |  48 ++++----
 qga/qapi-schema.json                          |   8 +-
 tests/unit/test-qmp-cmds.c                    |   1 +
 scripts/qapi/commands.py                      |   4 +-
 scripts/qapi/common.py                        | 116 ++++++++++++++++--
 scripts/qapi/events.py                        |   5 +-
 scripts/qapi/expr.py                          |  53 +++++---
 scripts/qapi/gen.py                           |  14 +--
 scripts/qapi/introspect.py                    |  26 ++--
 scripts/qapi/schema.py                        | 112 +++++++++++++----
 scripts/qapi/types.py                         |  33 ++---
 scripts/qapi/visit.py                         |  23 ++--
 .../alternate-branch-if-invalid.err           |   2 +-
 tests/qapi-schema/bad-if-empty.err            |   2 +-
 tests/qapi-schema/bad-if-list.err             |   2 +-
 tests/qapi-schema/bad-if.err                  |   3 +-
 tests/qapi-schema/bad-if.json                 |   2 +-
 tests/qapi-schema/doc-good.json               |   6 +-
 tests/qapi-schema/doc-good.out                |  12 +-
 tests/qapi-schema/doc-good.txt                |   6 +-
 tests/qapi-schema/enum-if-invalid.err         |   3 +-
 tests/qapi-schema/features-if-invalid.err     |   2 +-
 tests/qapi-schema/features-missing-name.json  |   2 +-
 tests/qapi-schema/qapi-schema-test.json       |  58 +++++----
 tests/qapi-schema/qapi-schema-test.out        |  67 +++++-----
 .../qapi-schema/struct-member-if-invalid.err  |   2 +-
 tests/qapi-schema/test-qapi.py                |   2 +-
 tests/qapi-schema/union-branch-if-invalid.err |   2 +-
 38 files changed, 493 insertions(+), 280 deletions(-)

-- 
2.29.0