if filetype == tex

I want to run a c开发者_开发百科ommand in the .vimrc in case a file is a latex file. I think I have something with the syntax, it does not work. Any clue?

if &filetype=='tex'
    set spell
endif

---

You can use auto commands to achieve what you want:

autocmd BufNewFile,BufRead *.tex set spell

---

For those who want to check the current filetype and do something while editing, this should work:

if (&ft=='c' || &ft=='cpp')
    :!g++ %
endif

---

Another way is to use index():

let fts = ['c', 'cpp']
if index(fts, &filetype) == -1
    " do stuff
endif

index() searches for the first index of an element in a string, and returns -1 if not found. This way you can just append more filetype values to your list, and not add more conditions for each file type.

---

You have to manually detect the filetype first, because vim will detect it automatically only after sourcing your vimrc.

Just add this:

`filetype detect`

before your code.

---

just to add to above using index. A quick block to check filetypes using ft

update :

if index(['tex'], &filetype) != -1
    echom "this is latex filetype!"
endif