class Sinatra::Base

def process_route(pattern, conditions, block = nil, values = [])
  route = @request.path_info
  route = '/' if route.empty? and not settings.empty_path_info?
  route = route[0..-2] if !settings.strict_paths? && route != '/' && route.end_with?('/')
  return unless params = pattern.params(route)
  params.delete("ignore") # TODO: better params handling, maybe turn it into "smart" object or detect changes
  force_encoding(params)
  @params = @params.merge(params) if params.any?
  regexp_exists = pattern.is_a?(Mustermann::Regular) || (pattern.respond_to?(:patterns) && pattern.patterns.any? {|subpattern| subpattern.is_a?(Mustermann::Regular)} )
  if regexp_exists
    captures           = pattern.match(route).captures.map { |c| URI_INSTANCE.unescape(c) if c }
    values            += captures
    @params[:captures] = force_encoding(captures) unless captures.nil? || captures.empty?
  else
    values += params.values.flatten
  end
  catch(:pass) do
    conditions.each { |c| throw :pass if c.bind(self).call == false }
    block ? block[self, values] : yield(self, values)
  end
rescue
  @env['sinatra.error.params'] = @params
  raise
ensure
  params ||= {}
  params.each { |k, _| @params.delete(k) } unless @env['sinatra.error.params']
end