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qapi: add 'if' to alternate members

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Add 'if' key to alternate members:

{ 'alternate': 'TestIfAlternate', 'data':
  { 'alt': { 'type': 'TestStruct', 'if': 'COND' } } }

Generated code is not changed by this patch but with "qapi: add #if
conditions to generated code".

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20181213123724.4866-17-marcandre.lureau@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
This commit is contained in:
Marc-André Lureau 2018-12-13 16:37:18 +04:00 committed by Markus Armbruster
parent a2724280fb
commit 3e270dcacc
4 changed files with 10 additions and 7 deletions
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2
docs/devel/qapi-code-gen.txt
View File

@ -754,7 +754,7 @@ gets its generated code guarded like this:
Where a member can be defined with a single string value for its type,
it is also possible to supply a dictionary instead with both 'type'
and 'if' keys. (TODO: alternate)
and 'if' keys.
Example: a conditional 'bar' member

10
scripts/qapi/common.py
View File

@ -833,7 +833,7 @@ def check_alternate(expr, info):
check_name(info, "Member of alternate '%s'" % name, key)
check_known_keys(info,
"member '%s' of alternate '%s'" % (key, name),
value, ['type'], [])
value, ['type'], ['if'])
typ = value['type']
# Ensure alternates have no type conflicts.
@ -1754,8 +1754,8 @@ class QAPISchema(object):
self._make_members(data, info),
None))
def _make_variant(self, case, typ):
return QAPISchemaObjectTypeVariant(case, typ)
def _make_variant(self, case, typ, ifcond):
return QAPISchemaObjectTypeVariant(case, typ, ifcond)
def _make_simple_variant(self, case, typ, ifcond, info):
if isinstance(typ, list):
@ -1778,7 +1778,7 @@ class QAPISchema(object):
name, info, doc, ifcond,
'base', self._make_members(base, info))
if tag_name:
variants = [self._make_variant(key, value['type'])
variants = [self._make_variant(key, value['type'], value.get('if'))
for (key, value) in data.items()]
members = []
else:
@ -1799,7 +1799,7 @@ class QAPISchema(object):
name = expr['alternate']
data = expr['data']
ifcond = expr.get('if')
variants = [self._make_variant(key, value['type'])
variants = [self._make_variant(key, value['type'], value.get('if'))
for (key, value) in data.items()]
tag_member = QAPISchemaObjectTypeMember('type', 'QType', False)
self._def_entity(

4
tests/qapi-schema/qapi-schema-test.json
View File

@ -218,7 +218,9 @@
{ 'command': 'TestIfUnionCmd', 'data': { 'union_cmd_arg': 'TestIfUnion' },
'if': 'defined(TEST_IF_UNION)' }
{ 'alternate': 'TestIfAlternate', 'data': { 'foo': 'int', 'bar': 'TestStruct' },
{ 'alternate': 'TestIfAlternate', 'data':
{ 'foo': 'int',
'bar': { 'type': 'TestStruct', 'if': 'defined(TEST_IF_ALT_BAR)'} },
'if': 'defined(TEST_IF_ALT) && defined(TEST_IF_STRUCT)' }
{ 'command': 'TestIfAlternateCmd', 'data': { 'alt_cmd_arg': 'TestIfAlternate' },

1
tests/qapi-schema/qapi-schema-test.out
View File

@ -300,6 +300,7 @@ alternate TestIfAlternate
tag type
case foo: int
case bar: TestStruct
if ['defined(TEST_IF_ALT_BAR)']
if ['defined(TEST_IF_ALT) && defined(TEST_IF_STRUCT)']
object q_obj_TestIfAlternateCmd-arg
member alt_cmd_arg: TestIfAlternate optional=False