[PATCH 0/9] Context-sensitive completion for Ada

[Tom Tromey]

This updates the Ada parser to allow context-sensitive completion, as
is already done for C, C++, and Rust.

In addition to the usual field name completion, Ada now also allows
completion of Ada attributes.

A hack was needed in the last patch in order to work around problems
with the word breaking algorithm.  I didn't see a way to handle this
without a larger rewrite of the Ada parser.

I think the only non-Ada-specific changes are the expression
completion refactoring in patch #4, and then a minor addition to this
code in patch #9.

Regression tested on x86-64 Fedora 34.

Tom