CPreprocessor,C: macro expands multiple lines

[kcwu]

The name of the parser: C

The command line you used to run ctags:

$ ctags --options=NONE -D 'SYSCALL_DEFINE3(name,...)=long name(__VA_ARGS__)'   open.c

open.c is extracted from linux kernel https://elixir.bootlin.com/linux/latest/source/fs/open.c#L714

The content of input file:

SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode)
{
        return do_faccessat(dfd, filename, mode, 0);
}

SYSCALL_DEFINE3(fchmodat, int, dfd, const char __user *, filename,
                umode_t, mode)
{
        return do_fchmodat(dfd, filename, mode, 0);
}

The tags output you are not satisfied with:

faccessat       open.c  /^SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode)$/;"    f       typeref:typename:long
fchmodat        open.c  /^              umode_t, mode)$/;"      f       typeref:typename:long

The tags output you expect:

faccessat       open.c  /^SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode)$/;"    f       typeref:typename:long
fchmodat        open.c  /^SYSCALL_DEFINE3(fchmodat, int, dfd, const char __user *, filename,/;"      f       typeref:typename:long

The version of ctags:

$ ctags --version
Universal Ctags 6.1.0(p6.1.20240609.0), Copyright (C) 2015-2023 Universal Ctags Team
Universal Ctags is derived from Exuberant Ctags.
Exuberant Ctags 5.8, Copyright (C) 1996-2009 Darren Hiebert
  Compiled: Jun 13 2024, 15:18:36
  URL: https://ctags.io/
  Output version: 0.0
  Optional compiled features: +wildcards, +regex, +iconv, +option-directory, +xpath, +packcc, +optscript, +pcre2

How do you get ctags binary:

Building it locally from master branch today.

[masatake]

It looks hard to fix.

[masatake]

While working on https://github.com/bootlin/elixir/issues/379, I found a way to solve this issue.

$ cat -n input.c                                                                                                                                                      
     1	SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode)
     2	{
     3	        return do_faccessat(dfd, filename, mode, 0);
     4	}
     5	
     6	SYSCALL_DEFINE3(fchmodat, int, dfd, const char __user *, filename,
     7	                umode_t, mode)
     8	{
     9	        return do_fchmodat(dfd, filename, mode, 0);
    10	}
$  ../../../ctags --options=NONE --fields=+n -o - -D 'SYSCALL_DEFINE3(name,...)=long name(__VA_ARGS__)'  input.c
ctags: Notice: No options will be read from files or environment
faccessat	input.c	/^SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode)$/;"	f	line:1	typeref:typename:long
fchmodat	input.c	/^SYSCALL_DEFINE3(fchmodat, int, dfd, const char __user *, filename,$/;"	f	line:6	typeref:typename:long

I'll make a request after polishing the change.