sd-bus: use terms from the D-Bus Specification a bit more

D-Bus' type hierarchy as described in the spec is:

\- basic
   \- fixed type (u, i, etc.)
   \- string-like type (s, o, g)
\- container

Someone seems to have referred to basic types as "simple types" at
some point, but that term isn't defined in the D-Bus Specification,
and seems redundant.

So far I haven't renamed functions that use "trivial" in their names
to mean "fixed type", to avoid confusion about whether a struct of
constant length, like (iu), is a fixed type. The answer is that it is
fixed-length, but is not a "fixed type", so I can see that something
like bus_type_is_fixed() might be ambiguous.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/libsystemd/sd-bus/bus-type.h b/src/libsystemd/sd-bus/bus-type.h
index 2e423bbfdb..581e8d5841 100644
--- a/src/libsystemd/sd-bus/bus-type.h
+++ b/src/libsystemd/sd-bus/bus-type.h
@@ -29,6 +29,8 @@
 bool bus_type_is_valid(char c) _const_;
 bool bus_type_is_valid_in_signature(char c) _const_;
 bool bus_type_is_basic(char c) _const_;
+/* "trivial" is systemd's term for what the D-Bus Specification calls
+ * a "fixed type": that is, a basic type of fixed length */
 bool bus_type_is_trivial(char c) _const_;
 bool bus_type_is_container(char c) _const_;