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qapi: replace if condition list with dict {'all': [...]}

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Replace the simple list sugar form with a recursive structure that will
accept other operators in the following commits (all, any or not).

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210804083105.97531-7-marcandre.lureau@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Accidental code motion undone.  Degenerate :forms: comment dropped.
Helper _check_if() moved.  Error messages tweaked.  ui.json updated.
Accidental changes to qapi-schema-test.json dropped.]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
This commit is contained in:
Marc-André Lureau 2021-08-04 12:31:01 +04:00 • committed by Markus Armbruster
parent d806f89f87
commit 5d83b9a130
27 changed files with 143 additions and 88 deletions
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64
scripts/qapi/expr.py
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@ -259,14 +259,9 @@ def check_flags(expr: _JSONObject, info: QAPISourceInfo) -> None:
def check_if(expr: _JSONObject, info: QAPISourceInfo, source: str) -> None:
"""
Normalize and validate the ``if`` member of an object.
Validate the ``if`` member of an object.
The ``if`` member may be either a ``str`` or a ``List[str]``.
A ``str`` value will be normalized to ``List[str]``.
:forms:
:sugared: ``Union[str, List[str]]``
:canonical: ``List[str]``
The ``if`` member may be either a ``str`` or a dict.
:param expr: The expression containing the ``if`` member to validate.
:param info: QAPI schema source file information.
@ -275,31 +270,46 @@ def check_if(expr: _JSONObject, info: QAPISourceInfo, source: str) -> None:
:raise QAPISemError:
When the "if" member fails validation, or when there are no
non-empty conditions.
:return: None, ``expr`` is normalized in-place as needed.
:return: None
"""
def _check_if(cond: Union[str, object]) -> None:
if isinstance(cond, str):
if not cond.strip():
raise QAPISemError(
info,
"'if' condition '%s' of %s makes no sense"
% (cond, source))
return
if not isinstance(cond, dict):
raise QAPISemError(
info,
"'if' condition of %s must be a string or an object" % source)
if len(cond) != 1:
raise QAPISemError(
info,
"'if' condition dict of %s must have one key: "
"'all'" % source)
check_keys(cond, info, "'if' condition", [],
["all"])
oper, operands = next(iter(cond.items()))
if not operands:
raise QAPISemError(
info, "'if' condition [] of %s is useless" % source)
if oper in ("all") and not isinstance(operands, list):
raise QAPISemError(
info, "'%s' condition of %s must be an array" % (oper, source))
for operand in operands:
_check_if(operand)
ifcond = expr.get('if')
if ifcond is None:
return
if isinstance(ifcond, list):
if not ifcond:
raise QAPISemError(
info, "'if' condition [] of %s is useless" % source)
else:
# Normalize to a list
ifcond = expr['if'] = [ifcond]
for elt in ifcond:
if not isinstance(elt, str):
raise QAPISemError(
info,
"'if' condition of %s must be a string or a list of strings"
% source)
if not elt.strip():
raise QAPISemError(
info,
"'if' condition '%s' of %s makes no sense"
% (elt, source))
_check_if(ifcond)
def normalize_members(members: object) -> None: