Begin preparing to remove public access to the .features member by
introducing a semantic "has features" property instead.

Signed-off-by: John Snow <jsnow@redhat.com>
---
 scripts/qapi/parser.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/scripts/qapi/parser.py b/scripts/qapi/parser.py
index b33edbba74f..dcc58170bd5 100644
--- a/scripts/qapi/parser.py
+++ b/scripts/qapi/parser.py
@@ -555,7 +555,7 @@ def get_doc(self) -> 'QAPIDoc':
                     break
                 # Non-blank line, first of a section
                 if line == 'Features:':
-                    if doc.features:
+                    if doc.has_features:
                         raise QAPIParseError(
                             self, "duplicated 'Features:' line")
                     self.accept(False)
@@ -570,7 +570,7 @@ def get_doc(self) -> 'QAPIDoc':
                         if text:
                             doc.append_line(text)
                         line = self.get_doc_indented(doc)
-                    if not doc.features:
+                    if not doc.has_features:
                         raise QAPIParseError(
                             self, 'feature descriptions expected')
                     no_more_args = True
@@ -741,6 +741,10 @@ def __init__(self, info: QAPISourceInfo, symbol: Optional[str] = None):
         # "Since" section
         self.since: Optional[QAPIDoc.Section] = None
 
+    @property
+    def has_features(self) -> bool:
+        return bool(self.features)
+
     def end(self) -> None:
         for section in self.all_sections:
             section.text = section.text.strip('\n')
-- 
2.54.0