[PATCH 16/23] docs/qapidoc: add visit_feature() method

[John Snow]

The format_type() method is adjusted here to return None for features,
because Features don't have documented types. This makes
generate_field() safe to use for features.

Signed-off-by: John Snow <jsnow@redhat.com>
---
 docs/sphinx/qapidoc.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/docs/sphinx/qapidoc.py b/docs/sphinx/qapidoc.py
index 7efe2d656c0..02f434c09ab 100644
--- a/docs/sphinx/qapidoc.py
+++ b/docs/sphinx/qapidoc.py
@@ -187,6 +187,15 @@ def visit_paragraph(self, section: QAPIDoc.Section) -> 
None:
         self.add_lines(section.text, section.info)
         self.ensure_blank_line()
 
+    def visit_feature(self, section: QAPIDoc.ArgSection) -> None:
+        # FIXME - ifcond for features is not handled at all yet!
+        # Proposal: decorate the right-hand column with some graphical
+        # element to indicate conditional availability?
+        assert section.text  # Guaranteed by parser.py
+        assert section.member
+
+        self.generate_field("feat", section.member, section.text, section.info)
+
     def visit_errors(self, section: QAPIDoc.Section) -> None:
         # FIXME: the formatting for errors may be inconsistent and may
         # or may not require different newline placement to ensure
-- 
2.47.0