#368 In the output tagfile, the symbol "#undef" and "#define" is the same. I think it should not be the same.

[Weng Da]

These two define : #undef UNDEF1 / #define DEFINE1
In the output tagfile the result is:
UNDEF1 ....../assert.c 30;" d file:
UNDEF1 ....../assert.c 30;" d file:
I think it is a bug, it should not be the same.

[Masatake YAMATO]

I'm not sure your expectation. Could you show the real input file?

[yamato@x201]/tmp/ctags% cat foo.c 
cat foo.c 
#undef UNDEF1 / #define DEFINE1
[yamato@x201]/tmp/ctags% ctags -o - foo.c
ctags -o - foo.c
ctags: Warning: Ignoring non-option in ./.ctags

UNDEF1  foo.c   1;" d   file:

[yamato@x201]/tmp/ctags% cat bar.c
cat bar.c
#undef UNDEF1
#define DEFINE1
[yamato@x201]/tmp/ctags% ./ctags -o - bar.c 
./ctags -o - bar.c 
DEFINE1 bar.c   /^#define DEFINE1$/;"   d   file:
UNDEF1  bar.c   /^#undef UNDEF1$/;" d   file:

[Weng Da]

It is like this:

[yamato@x201]/tmp/ctags% cat bar.c

cat bar.c

undef UNDEF1

define DEFINE1

[yamato@x201]/tmp/ctags% ./ctags -o - bar.c

./ctags -o - bar.c

DEFINE1 bar.c /^#define DEFINE1$/;" d file:

UNDEF1 bar.c /^#undef UNDEF1$/;" d file:

The output of “#undef” and “#define” are both “d”, I think the “#undef” and “#define” are not the same symbol.

发件人: Masatake YAMATO [mailto:m_yamato@users.sf.net]
发送时间: 2015年10月20日 10:59
收件人: [ctags:bugs]
主题: [ctags:bugs] #368 In the output tagfile, the symbol "#undef" and "#define" is the same. I think it should not be the same.

I'm not sure your expectation. Could you show the real input file?

[yamato@x201]/tmp/ctags% cat foo.c

cat foo.c

undef UNDEF1 / #define DEFINE1

[yamato@x201]/tmp/ctags% ctags -o - foo.c

ctags -o - foo.c

ctags: Warning: Ignoring non-option in ./.ctags

UNDEF1 foo.c 1;" d file:

[yamato@x201]/tmp/ctags% cat bar.c

cat bar.c

undef UNDEF1

define DEFINE1

[yamato@x201]/tmp/ctags% ./ctags -o - bar.c

./ctags -o - bar.c

DEFINE1 bar.c /^#define DEFINE1$/;" d file:

UNDEF1 bar.c /^#undef UNDEF1$/;" d file:

---

[bugs:#368]http://sourceforge.net/p/ctags/bugs/368/ In the output tagfile, the symbol "#undef" and "#define" is the same. I think it should not be the same.

Status: open
Group:
Created: Tue Oct 20, 2015 02:22 AM UTC by Weng Da
Last Updated: Tue Oct 20, 2015 02:22 AM UTC
Owner: nobody

These two define : #undef UNDEF1 / #define DEFINE1
In the output tagfile the result is:
UNDEF1 ....../assert.c 30;" d file:
UNDEF1 ....../assert.c 30;" d file:
I think it is a bug, it should not be the same.

---

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[Masatake YAMATO]

I see.

I can offset only following two choices.
1. Throwing away undef: universal-ctags developed at https://ctags.io has --undef=no option. With it you can make ctags not generate tags for undefs. If you are not interested in tags for undef, this is useful.
2. Exnteding ctags. By introducing a new concept "reference tag", undef can be handled well. I wrote my idea at https://github.com/universal-ctags/ctags/pull/569.