[PATCH 0/7] Update complex number support

[Tom Tromey]

A while back, I happened to notice that gdb did not handle complex
numbers very well.  You could print them but, at least in C, not enter
them; and no complex operations were supported.

This series improves this situation.  Now the C parser can read
complex numbers; some complex operations are supported; casts work
(which is important for "watch -location"); and the output is changed
to be easier to read (IMO).

Tom