impl of my picotemplate in coffeescript to see what it'd be like

µTpl.coffee

__deep = (obj, prop) ->
  for p in prop.split '.'
    if not (p in obj and obj = obj[p])
      return undefined
  obj() if typeof obj is 'function' else obj
  
getEscape = (tpl) ->
  qq = "\'" if '"' in tpl else "\""
  (str) -> qq + str + qq
  
_tplRegexp = /{{\s*([\w\.]+)\s*}}/ig

tplReplace = (str, m) ->
  __qq("__deep(obj, #{ __qq(m) })") if /\./g.test(m) else __qq("((typeof(#{ m }) !== #{ __qq('function') }) ? #{ m } : #{ m }())")

compile = (tpl) ->
  __qq = getEscape tpl
  Function ['obj'], "var __qq = #{ __qq.toString() }; with (obj) return #{ __qq(tpl.replace(/['"]/g, "\$&").replace(_tplRegexp, tplReplace) }; }"
  
window.µ = compile