document
    = p:part* { return p }

part
    = text / variable / block

text
    = b:(!tag c:. {return c})+
    { return { type: "text", text: b.join('') }; }

variable "variable"
    = t:tag_start rd         
    { return { type: "variable", name: t }; }

tag_start "tag_start"
    =   ld n:tagname
    { return n; }

tagname "tagname"
    = t:[a-zA-Z]+
    { return t.join(''); }

block "block"
    = t:block_tag_start p:part* n:block_end_tag
      &{ return t == n }
      { return { type: "block", name: n, data: p }; }

block_tag_start "tag_start"
    =  ld "block:" n:tagname rd
    { return n; }

block_end_tag
    =  ld "/block:" n:tagname rd
    { return n; }

tag
    = ld (!rd !eol [a-zA-Z\:\/])+ rd

ld
    = "{"

rd
    = "}"

eol
    = "\n"
    / "\r\n"
    / "\r"
    / "\u2028"
    / "\u2029"