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Re: improve gud-gdb completion

From: Stephen Leake
Subject: Re: improve gud-gdb completion
Date: Thu, 29 Jul 2021 16:31:56 -0700
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (windows-nt)

Michael Welsh Duggan <mwd@md5i.com> writes:

> Stephen Leake <stephen_leake@stephe-leake.org> writes:
>> I'd like to improve completion in gud-gdb.
>> Currently, it completes on names in the buffer being debugged, but it
>> doesn't include "." in the name, so if I'm trying to print
>> "Incremental_Parser.Parse_Errors.Length", it only completes to
>> "Incremental_Parser".
>> However, I can't figure out exactly what elisp code is harvesting names
>> from the buffer.
>> TAB is bound to completion-at-point.
>> completion-at-point-functions is
>> (gud-gdb-completion-at-point comint-completion-at-point t)
>> (default-value 'completion-at-point-functions) is
>> (tags-completion-at-point-function)
>> None of those completion functions look at the text in buffers.
>> What am I missing?
> Are you certain that it looks at the text in buffers at all?  If you
> look at gud-gdb-completions, you'll see that it uses gdb's completion
> mechanism based on symbols in the binary.

It finds names from my code; "Incremental_Parser" above.

I found a workaround by replacing the completion with hippie-expand, but
I'd still like to understand how the original configuration works.

-- Stephe

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