bug#35062: [PATCH 0/4] Trivial code cleanups

[Robert Pluim]

>>>>> On Mon, 01 Apr 2019 07:37:23 +0300, Eli Zaretskii <eliz@gnu.org> said:

    >> From: Konstantin Kharlamov <Hi-Angel@yandex.ru> Date: Mon, 1
    >> Apr 2019 01:37:38 +0300
    >> 
    >> These are mostly fixes of some of LGTM warnings
    >> https://lgtm.com/projects/g/emacs-mirror/emacs/alerts/?mode=tree
    >> 
    >> Except the second patch, where I initially wanted to fix one
    >> warning, and as part of it I had to constify a variable to see
    >> that it is indeed immutable. And then I figured I could search
    >> through the code and find more similar places, where variables
    >> weren't marked as const. I like this cleanup because it is
    >> simple and trivially testable (i.e. if it compiles, then it's
    >> fine). FTR: there's still lots of opportunities for
    >> constification, I just stopped at some point.

    Eli> Thanks.

    Eli> I think the general policy is not to fix those except when
    Eli> making other changes in the same function, but I will let
    Eli> others comment.

Iʼd prefer it if the effort went to determining if eg the alert for
'type = 2' below was correct or not, proving the constness of
variables is what we have a compiler for.

xterm.c:5346

        if (XSCROLL_BAR (bar)->x_window == window_id
            && FRAME_X_DISPLAY (XFRAME (frame)) == display
            && (type = 2
                || (type == 1 && XSCROLL_BAR (bar)->horizontal)
                || (type == 0 && !XSCROLL_BAR (bar)->horizontal)))
          return XSCROLL_BAR (bar);

Robert