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* bug#45160: 27.1; [C] wrong indent for knr-style arguments declaration
@ 2020-12-10 15:02 Bruno
  2020-12-11 16:33 ` Alan Mackenzie
  0 siblings, 1 reply; 4+ messages in thread
From: Bruno @ 2020-12-10 15:02 UTC (permalink / raw)
  To: 45160

Within "emacs -Q" session, open the following C source file:

------------------------------ foo.c
int f(i, j, k)
int i;
int j;
int k;
{
return 1;
}

int g(i, j, k)
int i;
int j, k;
{
return 1;
}
------------------------------

Then, do "C-c ." (c-set-style) to "k&r", and "c-c c-o" (c-set-offset),
and set "knr-argdecl-intro" to "+".

We have now the following values in c-offsets-alist :
knr-argdecl-intro : +  (First line of a K&R C argument declaration)
knr-argdecl : 0        (Subsequent lines in a K&R C argument declaration)

re-indent foo.c. At this stage we expect the following indentation for
arguments declarations.

------------------------------ expected indentation
int f(i, j, k)
    int i;
    int j;
    int k;
{
    return 1;
}

int g(i, j, k)
    int i;
    int j, k;
{
    return 1;
}
------------------------------

But we get the following result (please note line 11).

------------------------------ emacs indentation
int f(i, j, k)
    int i;
    int j;
    int k;
{
    return 1;
}

int g(i, j, k)
    int i;
int j, k;
{
    return 1;
}
------------------------------

It should be noted that if we separate each argument on separate lines
(function f), indentation is correct.
It is incorrect if multiple variables are in same declaration (function
g).

Also, multiple variables on first arguments declaration line seems to
have correct indentation.

Regards,

Bruno.

In GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 2.24.32)
 of 2020-10-29 built on lorien
Windowing system distributor 'The X.Org Foundation', version 11.0.12008000
System Description: Ubuntu 20.04.1 LTS

Recent messages:
End of buffer [3 times]
Beginning of buffer [3 times]
Making completion list...
Beginning of buffer [3 times]
previous-line: Beginning of buffer
user-error: No further undo information
C-x C-g is undefined
previous-line: Beginning of buffer [10 times]
scroll-up-command: End of buffer
command-execute: Buffer is read-only: #<buffer *Bug Help*>
Quit
Configured features:
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GNUTLS FREETYPE HARFBUZZ XFT ZLIB TOOLKIT_SCROLL_BARS GTK2 X11 XDBE XIM
MODULES THREADS PDUMPER GMP

Important settings:
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  value of $LC_MONETARY: en_IE.UTF-8
  value of $LC_NUMERIC: en_IE.UTF-8
  value of $LC_TIME: en_IE.UTF-8
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Fundamental

Minor modes in effect:
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  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
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  auto-composition-mode: t
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Load-path shadows:
None found.

Features:
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Memory information:
((conses 16 70553 13929)
 (symbols 48 8643 2)
 (strings 32 22665 2290)
 (string-bytes 1 841592)
 (vectors 16 13093)
 (vector-slots 8 166207 22348)
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 (buffers 1000 17))





^ permalink raw reply	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-12-12 14:48 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2020-12-10 15:02 bug#45160: 27.1; [C] wrong indent for knr-style arguments declaration Bruno
2020-12-11 16:33 ` Alan Mackenzie
2020-12-11 19:22   ` Bruno Raoult
2020-12-12 14:48     ` Alan Mackenzie

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