" SubX syntax file
" Language:    SubX
" Maintainer:  Kartik Agaram <mu@akkartik.com>
" URL:         https://github.com/akkartik/mu
" License:     public domain
"
" Copy this file into your ftplugin directory, and add the following to your
" vimrc or to .vim/ftdetect/subx.vim:
"   autocmd BufReadPost,BufNewFile *.subx set filetype=subx
"
" Some highlight groups you might want to select colors for in your vimrc:
"   subxFunction
"   subxMinorFunction
"   subxTest
"
" Optionally, devote more colors to different kinds of comments. Some suggestions
" for 256-color terminals to add to your vimrc:
"   blue tones:
"     highlight subxH1Comment cterm=underline ctermfg=27
"     highlight subxComment ctermfg=27
"     highlight subxS1Comment ctermfg=19
"     highlight subxS2Comment ctermfg=245
"   blue-green tones
"     highlight subxH1Comment cterm=underline ctermfg=25
"     highlight subxComment ctermfg=25
"     highlight subxS1Comment ctermfg=19
"     highlight subxS2Comment ctermfg=245
"   grey tones
"    highlight subxH1Comment cterm=bold,underline
"    highlight subxComment cterm=bold ctermfg=236
"    highlight subxS1Comment cterm=bold ctermfg=242
"    highlight subxS2Comment ctermfg=242

let s:save_cpo = &cpo
set cpo&vim

" setlocal iskeyword=@,48-57,?,!,_,$,-
setlocal formatoptions-=t  " allow long lines
setlocal formatoptions+=c  " but comments should still wrap

setlocal iskeyword+=-,?,<,>,$,@

syntax match subxH1Comment /# - .*/ | highlight link subxH1Comment Comment
syntax match subxComment /#\( \.\| - \|? \)\@!.*/ | highlight link subxComment Comment
syntax match subxS1Comment /# \..*/ | highlight link subxS1Comment Comment
syntax match subxS2Comment /# \. \..*/ | highlight link subxS2Comment Comment

set comments-=:#
set comments+=n:#
syntax match subxCommentedCode "#? .*"  | highlight link subxCommentedCode CommentedCode | highlight link CommentedCode Comment
let b:cmt_head = "#? "

" comment token
syntax match subxDelimiter / \. /  | highlight link subxDelimiter Normal

syntax match subxString %"[^"]*"% | highlight link subxString Constant

"" definitions
" match globals but not registers like 'EAX'
" don't match capitalized words in metadata
" don't match inside strings
syntax match subxGlobal %\(/\)\@<!\<[A-Z][a-z0-9_-]*\>% | highlight link subxGlobal SpecialChar

" functions but not tests, globals or internal functions
syntax match subxFunction "^\(test_\)\@<![a-z][^ ]*\(:\)\@=" | highlight link subxFunction Function
" tests starting with 'test-'; dark:34 light:64
syntax match subxTest "^test-[^ ]*\(:\)\@=" | highlight link subxTest Typedef
" internal functions starting with '_'
syntax match subxMinorFunction "^_[^ ]*\(:\)\@=" | highlight link subxMinorFunction Ignore
" other internal labels starting with '$'
syntax match subxLabel "^\$[^ ]*\(:\)\@=" | highlight link subxLabel Constant

syntax keyword subxControl break loop | highlight link subxControl Constant

let &cpo = s:save_cpo