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From: "jwakely.gcc at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug python/31743] <repeats N times> is confusing inside a python
 pretty printer
Date: Thu, 16 May 2024 09:33:37 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D31743

--- Comment #2 from Jonathan Wakely <jwakely.gcc at gmail dot com> ---
I think this is only a problem when the repeats feature is used for strings=
. If
I try a similar example with std::vector<std::array<int, 20>> it looks fine:

$1 =3D std::vector of length 2, capacity 2 =3D {{_M_elems =3D {7, 8, 9, 0 <=
repeats 17
times>}}, {_M_elems =3D {0, 1, 2, 0 <repeats 17 times>}}}


I think the difference is that for an arbitrary array the adjacent elements=
 are
never coalesced into a double-quoted string, they're always shown one-by-one
and so the <repeats...> part works well.

For the string case we get a mix of quoted strings and single chars:

"quoted string", 'c' <repeats N times>, "another quoted string"


Given that adjacent strings are concatenated in C and C++, i.e., "foo" "bar"
means "foobar", maybe we could make the display more consistent with that:

"quoted string" <'c' repeats N times> "another quoted string"

This doesn't put commas between the quoted parts, and doesn't switch between
the two forms "s" and 'c' so is a bit closer to being a valid string litera=
l in
C.

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