how vim implement the match words?

[redguardtoo]

download vim source code grep -rsn match_words .

[redguardtoo]

search files at /usr/share/vim/vim74/ftplugin/, search match-words These are languages I need support:

DONE ocaml.vim
csc.vim
DONE csh.vim
DONE jsp.vim
spec.vim
dtd.vim
dtrace.vim
liquid.vim
pascal.vim
make.vim
matlab.vim
DONE sql.vim
haml.vim
config.vim
DONE zsh.vim
abaqus.vim
ishd.vim
ada.vim
cobol.vim
zimbu.vim
DONE - sh.vim
falcon.vim
DONE vb.vim
verilog.vim
hamster.vim
DONE clojure.vim
context.vim
DONE vhdl.vim
pdf.vim
DONE aspvbs.vim
DONE php.vim
framescript.vim
postscr.vim
DONE fortran.vim