qapi/parser: Assert lexer value is a string

The type checker can't narrow the type of the token value to string,
because it's only loosely correlated with the return token.

We know that a token of '#' should always have a "str" value.
Add an assertion.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20210519183951.3946870-6-jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>

diff --git a/scripts/qapi/parser.py b/scripts/qapi/parser.py
index d620706fffb283f152e5531b535cb158f309cbac..0bc852eda724156c1a2f913003c2b4bb321f1015 100644 (file)
--- a/scripts/qapi/parser.py
+++ b/scripts/qapi/parser.py
@@ -304,6 +304,7 @@ class QAPISchemaParser:
         cur_doc = QAPIDoc(self, info)
         self.accept(False)
         while self.tok == '#':
+            assert isinstance(self.val, str)
             if self.val.startswith('##'):
                 # End of doc comment
                 if self.val != '##':