[Qemu-devel] [PATCH 2/9] qapi: allow build_params to return "void"

[Peter Xu <peterx@redhat.com>]

When there is no parameter at all for a function prototype, return
"void" for the parameter list.  This will happen after the next patch
where we removed the Error* for some of the emit functions.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 scripts/qapi/common.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/qapi/common.py b/scripts/qapi/common.py
index 8b6708dbf1..105c82742f 100644
--- a/scripts/qapi/common.py
+++ b/scripts/qapi/common.py
@@ -1963,7 +1963,7 @@ extern const QEnumLookup %(c_name)s_lookup;
 def build_params(arg_type, boxed, extra):
     if not arg_type:
         assert not boxed
-        return extra
+        return extra if extra else "void"
     ret = ''
     sep = ''
     if boxed:
@@ -1980,7 +1980,7 @@ def build_params(arg_type, boxed, extra):
                               c_name(memb.name))
     if extra:
         ret += sep + extra
-    return ret
+    return ret if ret else "void"
 
 
 #
-- 
2.17.1