* Comment out some lines in a c preprocessor (cpp) file will cause the comment section not to be left-aligned.
@ 2022-03-21 14:09 Hongyi Zhao
0 siblings, 0 replies; only message in thread
From: Hongyi Zhao @ 2022-03-21 14:09 UTC (permalink / raw)
To: help-gnu-emacs
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I opened the following c preprocessor (cpp) file in Emacs:
;;;;;;;;;;;;;;;;;;;;;;;; begin of test.cpp ;;;;;;;;;;;;;;;;;;;;;;;;
$ gcc -E ifdef.cxx
# 1 "ifdef.cxx"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 1 "<command-line>" 2
# 1 "ifdef.cxx"
#if 0
int i = 1;
#else
int i = 2;
#endif
;;;;;;;;;;;;;;;;;;;;;;;; end of test.cpp ;;;;;;;;;;;;;;;;;;;;;;;;
When I try to comment out the following part in the above file with `M-;`:
;;;;;;;;;;;;;
$ gcc -E ifdef.cxx
# 1 "ifdef.cxx"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 1 "<command-line>" 2
# 1 "ifdef.cxx"
;;;;;;;;;;;;;
I find the file will be commented into the format as shown in the
attachment. As you can see, comment out some lines in a c preprocessor
(cpp) file will cause the comment section not to be left-aligned. I am
very confused about this behavior of Emacs. Any hints will be
appreciated.
Regards
--
Assoc. Prof. Hongsheng Zhao <hongyi.zhao@gmail.com>
Theory and Simulation of Materials
Hebei Vocational University of Technology and Engineering
No. 473, Quannan West Street, Xindu District, Xingtai, Hebei province
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2022-03-21 14:09 Comment out some lines in a c preprocessor (cpp) file will cause the comment section not to be left-aligned Hongyi Zhao
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