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* [Bug preprocessor/107089] New: Line-terminating '\' leaves the characters when the next-line is a multi-line comment @ 2022-09-29 17:47 wcs84014 at xcoxc dot com 2022-09-29 22:42 ` [Bug preprocessor/107089] " pinskia at gcc dot gnu.org ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: wcs84014 at xcoxc dot com @ 2022-09-29 17:47 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107089 Bug ID: 107089 Summary: Line-terminating '\' leaves the characters when the next-line is a multi-line comment Product: gcc Version: 11.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: preprocessor Assignee: unassigned at gcc dot gnu.org Reporter: wcs84014 at xcoxc dot com Target Milestone: --- I found it when I tried to use the CPP as a general-purpose macro. ~$ gcc -v Target: x86_64-linux-gnu /gcc version 11.2.0 (Debian 11.2.0-13) ~$ cat a.c 1=\ //xyz ok*/ 2=\ /*xyz NG*/ 3=\(sp)(nl) /*xyz NG*/ 4=\ //*xyz ok:gcc NG:-traditional*/ ~$ cat a.c | cpp -P -C -nostdinc #-traditional-cpp 1=//xyz ok*/ 2=/*xyz z NG*/ <stdin>:9:3: warning: backslash and newline separated by space 3=/*xyz yz NG*/ 4=//*xyz ok:gcc NG:-traditional*/ ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug preprocessor/107089] Line-terminating '\' leaves the characters when the next-line is a multi-line comment 2022-09-29 17:47 [Bug preprocessor/107089] New: Line-terminating '\' leaves the characters when the next-line is a multi-line comment wcs84014 at xcoxc dot com @ 2022-09-29 22:42 ` pinskia at gcc dot gnu.org 2022-09-30 2:35 ` wcs84014 at xcoxc dot com 2022-10-06 10:00 ` wcs84014 at xcoxc dot com 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2022-09-29 22:42 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107089 --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- >I found it when I tried to use the CPP as a general-purpose macro. Well it is not designed to be a general purpose macro processor. You might want to try something like m4 instead. https://en.wikipedia.org/wiki/M4_(computer_language) Or any other that are already general-purpose macro processors: https://en.wikipedia.org/wiki/General-purpose_macro_processor ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug preprocessor/107089] Line-terminating '\' leaves the characters when the next-line is a multi-line comment 2022-09-29 17:47 [Bug preprocessor/107089] New: Line-terminating '\' leaves the characters when the next-line is a multi-line comment wcs84014 at xcoxc dot com 2022-09-29 22:42 ` [Bug preprocessor/107089] " pinskia at gcc dot gnu.org @ 2022-09-30 2:35 ` wcs84014 at xcoxc dot com 2022-10-06 10:00 ` wcs84014 at xcoxc dot com 2 siblings, 0 replies; 4+ messages in thread From: wcs84014 at xcoxc dot com @ 2022-09-30 2:35 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107089 --- Comment #2 from JohnDoe <wcs84014 at xcoxc dot com> --- >Andrew Pinski Thank you for your reply. That's right. Therefore, I am currently using my own parser. Nobody needs fix, so you can close this topic. However, the cause of the bug seems to be a mistake in the pointer count as: while(++p) <-> while(p++) I already read the document: https://gcc.gnu.org/onlineDocscpp I have used a little M4 in Autotools. Certainly POSIX, portable, real macro, but minor. I tried to provide a mechanism to customize to ordinary users using the CPP. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug preprocessor/107089] Line-terminating '\' leaves the characters when the next-line is a multi-line comment 2022-09-29 17:47 [Bug preprocessor/107089] New: Line-terminating '\' leaves the characters when the next-line is a multi-line comment wcs84014 at xcoxc dot com 2022-09-29 22:42 ` [Bug preprocessor/107089] " pinskia at gcc dot gnu.org 2022-09-30 2:35 ` wcs84014 at xcoxc dot com @ 2022-10-06 10:00 ` wcs84014 at xcoxc dot com 2 siblings, 0 replies; 4+ messages in thread From: wcs84014 at xcoxc dot com @ 2022-10-06 10:00 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107089 JohnDoe <wcs84014 at xcoxc dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |WONTFIX Status|UNCONFIRMED |RESOLVED --- Comment #3 from JohnDoe <wcs84014 at xcoxc dot com> --- Close report. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2022-10-06 10:00 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2022-09-29 17:47 [Bug preprocessor/107089] New: Line-terminating '\' leaves the characters when the next-line is a multi-line comment wcs84014 at xcoxc dot com 2022-09-29 22:42 ` [Bug preprocessor/107089] " pinskia at gcc dot gnu.org 2022-09-30 2:35 ` wcs84014 at xcoxc dot com 2022-10-06 10:00 ` wcs84014 at xcoxc dot com
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