module Roda::RodaPlugins::SymbolMatchers::RequestMethods

def _match_symbol(s)

behavior.
if the symbol is registered. Otherwise, call super for the default
Use regular expressions to the symbol-specific regular expression 
def _match_symbol(s)
  meth = :"match_symbol_#{s}"
  if respond_to?(meth, true)
    # Allow calling private match methods
    _, re, convert_meth = send(meth)
    if re
      consume(re, convert_meth)
    else
      # defined in class_matchers plugin
      _consume_segment(convert_meth)
    end
  else
    super
  end
end

def _match_symbol_regexp(s)

Otherwise, call super for the default behavior.
Return the symbol-specific regular expression if one is registered. 
def _match_symbol_regexp(s)
  meth = :"match_symbol_#{s}"
  if respond_to?(meth, true)
    # Allow calling private match methods
    re, = send(meth)
    re
  else
    super
  end
end