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qapi: Replace List[str] with Sequence[str] for ifcond

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It does happen to be a list (as of now), but we can describe it in more
general terms with no loss in accuracy to allow tuples and other
constructs.

In the future, we can write "ifcond: Sequence[str] = ()" as a default
parameter, which we could not do safely with a Mutable type like a List.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20210216021809.134886-2-jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Commit message tweaked]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
This commit is contained in:
John Snow 2021-02-15 21:17:51 -05:00 committed by Markus Armbruster
parent 91416a4254
commit 2184bca7b1
5 changed files with 21 additions and 20 deletions
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3
scripts/qapi/commands.py
View File

@ -17,6 +17,7 @@
Dict,
List,
Optional,
Sequence,
Set,
)
@ -297,7 +298,7 @@ def visit_end(self) -> None:
def visit_command(self,
name: str,
info: Optional[QAPISourceInfo],
ifcond: List[str],
ifcond: Sequence[str],
features: List[QAPISchemaFeature],
arg_type: Optional[QAPISchemaObjectType],
ret_type: Optional[QAPISchemaType],

4
scripts/qapi/events.py
View File

@ -12,7 +12,7 @@
See the COPYING file in the top-level directory.
"""
from typing import List, Optional
from typing import List, Optional, Sequence
from .common import c_enum_const, c_name, mcgen
from .gen import QAPISchemaModularCVisitor, build_params, ifcontext
@ -214,7 +214,7 @@ def visit_end(self) -> None:
def visit_event(self,
name: str,
info: Optional[QAPISourceInfo],
ifcond: List[str],
ifcond: Sequence[str],
features: List[QAPISchemaFeature],
arg_type: Optional[QAPISchemaObjectType],
boxed: bool) -> None:

12
scripts/qapi/gen.py
View File

@ -17,8 +17,8 @@
from typing import (
Dict,
Iterator,
List,
Optional,
Sequence,
Tuple,
)
@ -85,7 +85,7 @@ def write(self, output_dir: str) -> None:
fp.write(text)
def _wrap_ifcond(ifcond: List[str], before: str, after: str) -> str:
def _wrap_ifcond(ifcond: Sequence[str], before: str, after: str) -> str:
if before == after:
return after # suppress empty #if ... #endif
@ -127,9 +127,9 @@ def build_params(arg_type: Optional[QAPISchemaObjectType],
class QAPIGenCCode(QAPIGen):
def __init__(self, fname: str):
super().__init__(fname)
self._start_if: Optional[Tuple[List[str], str, str]] = None
self._start_if: Optional[Tuple[Sequence[str], str, str]] = None
def start_if(self, ifcond: List[str]) -> None:
def start_if(self, ifcond: Sequence[str]) -> None:
assert self._start_if is None
self._start_if = (ifcond, self._body, self._preamble)
@ -187,11 +187,11 @@ def _bottom(self) -> str:
@contextmanager
def ifcontext(ifcond: List[str], *args: QAPIGenCCode) -> Iterator[None]:
def ifcontext(ifcond: Sequence[str], *args: QAPIGenCCode) -> Iterator[None]:
"""
A with-statement context manager that wraps with `start_if()` / `end_if()`.
:param ifcond: A list of conditionals, passed to `start_if()`.
:param ifcond: A sequence of conditionals, passed to `start_if()`.
:param args: any number of `QAPIGenCCode`.
Example::

12
scripts/qapi/types.py
View File

@ -13,7 +13,7 @@
# See the COPYING file in the top-level directory.
"""
from typing import List, Optional
from typing import List, Optional, Sequence
from .common import (
c_enum_const,
@ -139,7 +139,7 @@ def gen_struct_members(members: List[QAPISchemaObjectTypeMember]) -> str:
return ret
def gen_object(name: str, ifcond: List[str],
def gen_object(name: str, ifcond: Sequence[str],
base: Optional[QAPISchemaObjectType],
members: List[QAPISchemaObjectTypeMember],
variants: Optional[QAPISchemaVariants]) -> str:
@ -307,7 +307,7 @@ def _gen_type_cleanup(self, name: str) -> None:
def visit_enum_type(self,
name: str,
info: Optional[QAPISourceInfo],
ifcond: List[str],
ifcond: Sequence[str],
features: List[QAPISchemaFeature],
members: List[QAPISchemaEnumMember],
prefix: Optional[str]) -> None:
@ -318,7 +318,7 @@ def visit_enum_type(self,
def visit_array_type(self,
name: str,
info: Optional[QAPISourceInfo],
ifcond: List[str],
ifcond: Sequence[str],
element_type: QAPISchemaType) -> None:
with ifcontext(ifcond, self._genh, self._genc):
self._genh.preamble_add(gen_fwd_object_or_array(name))
@ -328,7 +328,7 @@ def visit_array_type(self,
def visit_object_type(self,
name: str,
info: Optional[QAPISourceInfo],
ifcond: List[str],
ifcond: Sequence[str],
features: List[QAPISchemaFeature],
base: Optional[QAPISchemaObjectType],
members: List[QAPISchemaObjectTypeMember],
@ -351,7 +351,7 @@ def visit_object_type(self,
def visit_alternate_type(self,
name: str,
info: Optional[QAPISourceInfo],
ifcond: List[str],
ifcond: Sequence[str],
features: List[QAPISchemaFeature],
variants: QAPISchemaVariants) -> None:
with ifcontext(ifcond, self._genh):

10
scripts/qapi/visit.py
View File

@ -13,7 +13,7 @@
See the COPYING file in the top-level directory.
"""
from typing import List, Optional
from typing import List, Optional, Sequence
from .common import (
c_enum_const,
@ -337,7 +337,7 @@ def _begin_user_module(self, name: str) -> None:
def visit_enum_type(self,
name: str,
info: Optional[QAPISourceInfo],
ifcond: List[str],
ifcond: Sequence[str],
features: List[QAPISchemaFeature],
members: List[QAPISchemaEnumMember],
prefix: Optional[str]) -> None:
@ -348,7 +348,7 @@ def visit_enum_type(self,
def visit_array_type(self,
name: str,
info: Optional[QAPISourceInfo],
ifcond: List[str],
ifcond: Sequence[str],
element_type: QAPISchemaType) -> None:
with ifcontext(ifcond, self._genh, self._genc):
self._genh.add(gen_visit_decl(name))
@ -357,7 +357,7 @@ def visit_array_type(self,
def visit_object_type(self,
name: str,
info: Optional[QAPISourceInfo],
ifcond: List[str],
ifcond: Sequence[str],
features: List[QAPISchemaFeature],
base: Optional[QAPISchemaObjectType],
members: List[QAPISchemaObjectTypeMember],
@ -379,7 +379,7 @@ def visit_object_type(self,
def visit_alternate_type(self,
name: str,
info: Optional[QAPISourceInfo],
ifcond: List[str],
ifcond: Sequence[str],
features: List[QAPISchemaFeature],
variants: QAPISchemaVariants) -> None:
with ifcontext(ifcond, self._genh, self._genc):