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bh=xpkhKvDHe9RkmkEsvTSqCffg5pJnPEUTyuWI8r+TjZk=; b=EPD7npMqIgiAdXFiYMgSph3HmM7Mnf1xsO/a74xhuIaHnqoOSQ/Tj0plbzTNgbq+ymHav3 0F2gMbjZAJVMJtmWWb5sGzco8TaqTAXm1zF5tZHFtmM1KV+MvvP/q+UooXThqtkui8pVoE BAod1zK5UUzctkF0vHrNXOAK/DqkDRQ= X-MC-Unique: i6Kw0kCOOGGzp1sbBkOACg-1 From: John Snow To: qemu-devel@nongnu.org Subject: [PATCH 09/22] qapi: add match_nofail helper Date: Wed, 21 Apr 2021 23:07:07 -0400 Message-Id: <20210422030720.3685766-10-jsnow@redhat.com> In-Reply-To: <20210422030720.3685766-1-jsnow@redhat.com> References: <20210422030720.3685766-1-jsnow@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jsnow@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=jsnow@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Michael Roth , Cleber Rosa , John Snow , Markus Armbruster , Eduardo Habkost Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Mypy cannot generally understand that these regex functions cannot possibly fail. Add a _nofail helper that clarifies this for mypy. Signed-off-by: John Snow --- scripts/qapi/common.py | 8 +++++++- scripts/qapi/main.py | 6 ++---- scripts/qapi/parser.py | 13 +++++++------ 3 files changed, 16 insertions(+), 11 deletions(-) diff --git a/scripts/qapi/common.py b/scripts/qapi/common.py index cbd3fd81d36..d38c1746767 100644 --- a/scripts/qapi/common.py +++ b/scripts/qapi/common.py @@ -12,7 +12,7 @@ # See the COPYING file in the top-level directory. =20 import re -from typing import Optional, Sequence +from typing import Match, Optional, Sequence =20 =20 #: Magic string that gets removed along with all space to its right. @@ -210,3 +210,9 @@ def gen_endif(ifcond: Sequence[str]) -> str: #endif /* %(cond)s */ ''', cond=3Difc) return ret + + +def match_nofail(pattern: str, string: str) -> Match[str]: + match =3D re.match(pattern, string) + assert match is not None + return match diff --git a/scripts/qapi/main.py b/scripts/qapi/main.py index 70f8aa86f37..e8d4ba4b389 100644 --- a/scripts/qapi/main.py +++ b/scripts/qapi/main.py @@ -8,11 +8,11 @@ """ =20 import argparse -import re import sys from typing import Optional =20 from .commands import gen_commands +from .common import match_nofail from .error import QAPIError from .events import gen_events from .introspect import gen_introspect @@ -22,9 +22,7 @@ =20 =20 def invalid_prefix_char(prefix: str) -> Optional[str]: - match =3D re.match(r'([A-Za-z_.-][A-Za-z0-9_.-]*)?', prefix) - # match cannot be None, but mypy cannot infer that. - assert match is not None + match =3D match_nofail(r'([A-Za-z_.-][A-Za-z0-9_.-]*)?', prefix) if match.end() !=3D len(prefix): return prefix[match.end()] return None diff --git a/scripts/qapi/parser.py b/scripts/qapi/parser.py index f2425c0228a..7f3c009f64b 100644 --- a/scripts/qapi/parser.py +++ b/scripts/qapi/parser.py @@ -18,6 +18,7 @@ import os import re =20 +from .common import match_nofail from .error import QAPISemError, QAPISourceError from .source import QAPISourceInfo =20 @@ -235,8 +236,8 @@ def accept(self, skip_comment=3DTrue): elif not self.tok.isspace(): # Show up to next structural, whitespace or quote # character - match =3D re.match('[^[\\]{}:,\\s\'"]+', - self.src[self.cursor-1:]) + match =3D match_nofail('[^[\\]{}:,\\s\'"]+', + self.src[self.cursor-1:]) raise QAPIParseError(self, "stray '%s'" % match.group(0)) =20 def get_members(self): @@ -369,7 +370,7 @@ def append(self, line): # Strip leading spaces corresponding to the expected indent le= vel # Blank lines are always OK. if line: - indent =3D re.match(r'\s*', line).end() + indent =3D match_nofail(r'\s*', line).end() if indent < self._indent: raise QAPIParseError( self._parser, @@ -505,7 +506,7 @@ def _append_args_line(self, line): # from line and replace it with spaces so that 'f' has the # same index as it did in the original line and can be # handled the same way we will handle following lines. - indent =3D re.match(r'@\S*:\s*', line).end() + indent =3D match_nofail(r'@\S*:\s*', line).end() line =3D line[indent:] if not line: # Line was just the "@arg:" header; following lines @@ -540,7 +541,7 @@ def _append_features_line(self, line): # from line and replace it with spaces so that 'f' has the # same index as it did in the original line and can be # handled the same way we will handle following lines. - indent =3D re.match(r'@\S*:\s*', line).end() + indent =3D match_nofail(r'@\S*:\s*', line).end() line =3D line[indent:] if not line: # Line was just the "@arg:" header; following lines @@ -586,7 +587,7 @@ def _append_various_line(self, line): # from line and replace it with spaces so that 'f' has the # same index as it did in the original line and can be # handled the same way we will handle following lines. - indent =3D re.match(r'\S*:\s*', line).end() + indent =3D match_nofail(r'\S*:\s*', line).end() line =3D line[indent:] if not line: # Line was just the "Section:" header; following lines --=20 2.30.2