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[v5,03/10] coccinelle: Add script to remove useless QObject casts

Message ID 20170427215821.19397-4-eblake@redhat.com
State New
Headers show

Commit Message

Eric Blake April 27, 2017, 9:58 p.m. UTC 
We have macros in place to make it less verbose to add a subtype
of QObject to both QDict and QList. While we have made cleanups
like this in the past (see commit fcfcd8ffc, for example), having
it be automated by Coccinelle makes it easier to maintain.

The script is separate from the cleanups, for ease of review and
backporting.  A later patch will then add further possible cleanups.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>

---
v5: add R-b
v4: no change
v3: new patch
---
 MAINTAINERS                      |  1 +
 scripts/coccinelle/qobject.cocci | 13 +++++++++++++
 2 files changed, 14 insertions(+)
 create mode 100644 scripts/coccinelle/qobject.cocci
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Patch

diff --git a/MAINTAINERS b/MAINTAINERS
index a1d2b3a..d852efc 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1393,6 +1393,7 @@  S: Supported
 F: qobject/
 F: include/qapi/qmp/
 X: include/qapi/qmp/dispatch.h
+F: scripts/coccinelle/qobject.cocci
 F: tests/check-qdict.c
 F: tests/check-qfloat.c
 F: tests/check-qint.c
diff --git a/scripts/coccinelle/qobject.cocci b/scripts/coccinelle/qobject.cocci
new file mode 100644
index 0000000..aa899e2
--- /dev/null
+++ b/scripts/coccinelle/qobject.cocci
@@ -0,0 +1,13 @@ 
+// Use QDict macros where they make sense
+@@
+expression Obj, Key, E;
+@@
+- qdict_put_obj(Obj, Key, QOBJECT(E));
++ qdict_put(Obj, Key, E);
+
+// Use QList macros where they make sense
+@@
+expression Obj, E;
+@@
+- qlist_append_obj(Obj, QOBJECT(E));
++ qlist_append(Obj, E);