" 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 ast ast_prefix ast_suffix drop module prefix ptype start token tokenid

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

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