Ctags is stubbornly refusing to print line numbers

I am experimenting with Ctags in my cmd terminal. Perhaps I should first give some background information about my system:

Windows 10, 64-bit
Installed Ctags from this source: https://github.com/universal-ctags/ctags-win32/releases
Added Ctags to my PATH variable

First I navigate to my C/C++ source folder with the cmd terminal. Then I issue the following command:

ctags -R --output-format=json -f tag.tg

I get a tag file in the current directory as expected. The tag-file refers to each tag using a pattern. That's great, but I want to have line-numers instead. So I remove the tag file first, and rebuild it with the following command:

ctags -R --output-format=json --excmd=number -f tag.tg

But nothing changes. I still got a pattern field where I want to have a line-number field (not sure how that field would be named exactly, but you get the point).

What did I do wrong?

I tried the following approach:

ctags -R --output-format=json --fields="n" -f tag.tg

This gives me indeed the "line" field. But the "typeref", "kind", "scope" and "scopeKind" fields are gone.

The following approach keeps all those fields:

ctags -R --output-format=json --fields="+n" -f tag.tg

Thank you Stargateur for your answer :-)

Solution

According to the documentation you need to ask specific field with --fields option:

 ctags -R --output-format=json --fields="n" -f tag.tg

Works for me.

You can see full list of option with:

ctags --list-fields