return function(utf8)

local matchers = {
  any = function()
    return [[
  add(function(ctx) -- any
    ctx.result.finish = ctx.pos - 1
    ctx:done()
  end)
]]
  end,
  toend = function(ctx)
    return [[
  add(function(ctx) -- toend
    ctx.result.finish = ctx.pos - 1
    ctx.modified = true
    if ctx.pos == utf8len(ctx.str) + 1 then ctx:done() end
  end)
]]
  end,
}

local len = utf8.raw.len

local function default()
  return matchers.any()
end

local function parse(regex, c, bs, ctx)
  local functions
  local skip = 0

  if bs == len(regex) and c == '$' then
    functions = matchers.toend()
    skip = 1
  end

  return functions, skip
end

return {
  parse = parse,
  default = default,
}

end