BTags does not work with C++

[walkingsparrow]

BTags works for my Python files, but on C++ files, I got "Failed to extract tags".

[walkingsparrow]

Not sure why you want me to check Python. Python works. But C++ does not
work.

2015年9月28日星期一，Junegunn Choi notifications@github.com 写道：

• See the output of :echo &filetype from vim, it should be python
• Check if ctags -f - --sort=no --excmd=number --language-force=python
  FILENAME works

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#17 (comment).

[junegunn]

Yeah, I misread the comment. Looks like cpp is not a valid type for ctags command.

ctags -f - --sort=no --excmd=number --language-force=cpp FILENAME
ctags: Unknown language "cpp" in "language-force" option

[walkingsparrow]

I see. It seems one possible solution would be to force ctags to use c
tags for c++.

2015年9月28日星期一，Junegunn Choi notifications@github.com 写道：

Yeah, I misread the comment. Looks like cpp is not a valid type for ctags
command.

ctags -f - --sort=no --excmd=number --language-force=cpp FILENAME
ctags: Unknown language "cpp" in "language-force" option

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#17 (comment).

[junegunn]

Hmm, I just decided not to use the option, ctags seems to do good enough job inferring the right type for the file, even checking the she-bang line.

http://ctags.sourceforge.net/ctags.html

Unless the −−language−force option is specified, the language of each source file is automatically selected based upon a mapping of file names to languages. The mappings in effect for each language may be display using the −−list−maps option and may be changed using the −−langmap option. On platforms which support it, if the name of a file is not mapped to a language and the file is executable, the first line of the file is checked to see if the file is a "#!" script for a recognized language.

[vpshastry]

Instead of providing cpp provide c++ in generating ctags.
--language-force=c++ that should work.

[vpshastry]

making it --language-force=auto solved it for me.

ctags -f - --sort=no --excmd=number --language-force=auto %s', expand('%:S')

[JohanChane]

Work for me.

printf('ctags -f - --sort=yes --excmd=number --language-force=%s %s 2> %s %s', &filetype == 'cpp' ? 'c++' : &filetype, escaped, null, sort)