正攻法なら「--list-languages」を使う。
D:\temp>ctags --list-languages Asm Asp Awk Basic BETA C C++ C# Cobol Eiffel Erlang Fortran HTML Java JavaScript Lisp Lua Make Pascal Perl PHP Python REXX Ruby Scheme Sh SLang SML SQL Tcl Vera Verilog Vim YACC D:\temp>
裏技っぽくしたいなら「--verbose」を使う。「Installing parsers」で表示される言語が、手持ちのctagsで対応している言語になるはず。
D:\temp>ctags --verbose
Installing parsers: Asm, Asp, Awk, Basic, BETA, C, C++, C#, Cobol, Eiffel, Erlan
g, Fortran, HTML, Java, JavaScript, Lisp, Lua, Make, Pascal, Perl, PHP, Python,
REXX, Ruby, Scheme, Sh, SLang, SML, SQL, Tcl, Vera, Verilog, Vim, YACC
Setting option defaults
Setting default header extensions: h, H, hh, hpp, hxx, h++, inc, def
Installing default language mappings:
Asm: (*.A51) (*.29[kK]) (*.[68][68][kKsSxX]) (*.[xX][68][68]) .asm .ASM .s .S
Asp: .asp .asa
Awk: .awk .gawk .mawk
Basic: .bas .bi .bb .pb
BETA: .bet
C: .c
C++: .c++ .cc .cp .cpp .cxx .h .h++ .hh .hp .hpp .hxx
C#: .cs
Cobol: .cbl .cob .CBL .COB
Eiffel: .e
Erlang: .erl .ERL .hrl .HRL
Fortran: .f .for .ftn .f77 .f90 .f95
HTML: .htm .html
Java: .java
JavaScript: .js
Lisp: .cl .clisp .el .l .lisp .lsp .ml
Lua: .lua
Make: ([Mm]akefile) .mak .mk
Pascal: .p .pas
Perl: .pl .pm .plx .perl
PHP: .php .php3 .phtml
Python: .py .pyx .pxd .scons
REXX: .cmd .rexx .rx
Ruby: .rb .ruby
Scheme: .SCM .SM .sch .scheme .scm .sm
Sh: .sh .SH .bsh .bash .ksh .zsh
SLang: .sl
SML: .sml .sig
SQL: .sql
Tcl: .tcl .tk .wish .itcl
Vera: .vr .vri .vrh
Verilog: .v
Vim: .vim
YACC: .y
Installing default exclude patterns:
adding exclude pattern: {arch}
adding exclude pattern: .arch-ids
adding exclude pattern: .arch-inventory
adding exclude pattern: autom4te.cache
adding exclude pattern: BitKeeper
adding exclude pattern: .bzr
adding exclude pattern: .bzrignore
adding exclude pattern: CVS
adding exclude pattern: .cvsignore
adding exclude pattern: _darcs
adding exclude pattern: .deps
adding exclude pattern: EIFGEN
adding exclude pattern: .git
adding exclude pattern: .hg
adding exclude pattern: PENDING
adding exclude pattern: RCS
adding exclude pattern: RESYNC
adding exclude pattern: SCCS
adding exclude pattern: .svn
Considering option file /ctags.cnf: not found
Considering option file /etc/ctags.conf: not found
Considering option file /usr/local/etc/ctags.conf: not found
Considering option file D:\home\.ctags: reading...
Option: --regex-javascript=/^[ \t]*(.*)[ \t]*:[ \t]*function/\1/m,methods/
Considering option file D:\home\ctags.cnf: not found
Considering option file .\.ctags: not found
Considering option file .\ctags.cnf: not found
Reading initial options from command line
ctags: No files specified. Try "ctags --help".
D:\temp>ただそれだけ。特に意味はない。
