lexers/litcoffee.lua

   1 -- Copyright 2006-2013 Robert Gieseke. See LICENSE.
   2 -- Literate CoffeeScript LPeg lexer.
   3 -- http://coffeescript.org/#literate
   4
   5 local l = require('lexer')
   6 local token = l.token
   7 local P = lpeg.P
   8
   9 local M = {_NAME = 'litcoffee'}
  10
  11 -- Embedded in Markdown.
  12 local markdown = l.load('markdown')
  13 M._lexer = markdown -- ensure markdown's rules are loaded, not HTML's
  14
  15 -- Embedded CoffeeScript.
  16 local coffeescript = l.load('coffeescript')
  17 local coffee_start_rule = token(l.STYLE_EMBEDDED, (P(' ')^4 + P('\t')))
  18 local coffee_end_rule = token(l.STYLE_EMBEDDED, l.newline)
  19 l.embed_lexer(markdown, coffeescript, coffee_start_rule, coffee_end_rule)
  20
  21 return M