" Vim syntax file for Propane
" Language: propane
" Maintainer: Josh Holtrop
" URL: https://github.com/holtrop/propane

if exists("b:current_syntax")
  finish
endif

if !exists("b:propane_subtype")
  let b:propane_subtype = "d"
endif

exe "syn include @propaneTarget syntax/".b:propane_subtype.".vim"

syn region propaneTarget matchgroup=propaneDelimiter start="<<" end=">>$" contains=@propaneTarget keepend

syn match propaneComment "#.*"
syn match propaneOperator "->"
syn match propaneFieldAlias ":[a-zA-Z0-9_]\+" contains=propaneFieldOperator
syn match propaneFieldOperator ":" contained
syn match propaneOperator "?"
syn keyword propaneKeyword drop free_token_node free_token_user_fields module prefix ptype start token token_user_fields tokenid tree tree_prefix tree_suffix

syn region propaneRegex start="/" end="/" skip="\v\\\\|\\/"

hi def link propaneComment Comment
hi def link propaneKeyword Keyword
hi def link propaneRegex String
hi def link propaneOperator Operator
hi def link propaneFieldOperator Operator
hi def link propaneDelimiter Delimiter
hi def link propaneFieldAlias Identifier