class RDoc::AnyMethod

def _call_seq
  @call_seq if defined?(@call_seq) && @call_seq
end

def add_alias an_alias, context = nil
  method = self.class.new an_alias.text, an_alias.new_name
  method.record_location an_alias.file
  method.singleton = self.singleton
  method.params = self.params
  method.visibility = self.visibility
  method.comment = an_alias.comment
  method.is_alias_for = self
  @aliases << method
  context.add_method method if context
  method
end

def aref_prefix
  'method'
end

def arglists
  if @call_seq then
    @call_seq
  elsif @params then
    "#{name}#{param_seq}"
  end
end

def call_seq
  unless call_seq = _call_seq
    call_seq = is_alias_for._call_seq if is_alias_for
  end
  return unless call_seq
  deduplicate_call_seq(call_seq)
end

def call_seq= call_seq
  return if call_seq.empty?
  @call_seq = call_seq
end

def deduplicate_call_seq(call_seq)
  return call_seq unless is_alias_for || !aliases.empty?
  method_name = self.name
  method_name = method_name[0, 1] if method_name =~ /\A\[/
  entries = call_seq.split "\n"
  ignore = aliases.map(&:name)
  if is_alias_for
    ignore << is_alias_for.name
    ignore.concat is_alias_for.aliases.map(&:name)
  end
  ignore.map! { |n| n =~ /\A\[/ ? /\[.*\]/ : n}
  ignore.delete(method_name)
  ignore = Regexp.union(ignore)
  matching = entries.reject do |entry|
    entry =~ /^\w*\.?#{ignore}[$\(\s]/ or
      entry =~ /\s#{ignore}\s/
  end
  matching.empty? ? nil : matching.join("\n")
end

def has_call_seq?
  !!(@call_seq || is_alias_for&._call_seq)
end

def initialize text, name
  super
  @c_function = nil
  @dont_rename_initialize = false
  @token_stream = nil
  @calls_super = false
  @superclass_method = nil
end

def is_alias_for # :nodoc:
  case @is_alias_for
  when RDoc::MethodAttr then
    @is_alias_for
  when Array then
    return nil unless @store
    klass_name, singleton, method_name = @is_alias_for
    return nil unless klass = @store.find_class_or_module(klass_name)
    @is_alias_for = klass.find_method method_name, singleton
  end
end

def marshal_dump
  aliases = @aliases.map do |a|
    [a.name, parse(a.comment)]
  end
  is_alias_for = [
    @is_alias_for.parent.full_name,
    @is_alias_for.singleton,
    @is_alias_for.name
  ] if @is_alias_for
  [ MARSHAL_VERSION,
    @name,
    full_name,
    @singleton,
    @visibility,
    parse(@comment),
    @call_seq,
    @block_params,
    aliases,
    @params,
    @file.relative_name,
    @calls_super,
    @parent.name,
    @parent.class,
    @section.title,
    is_alias_for,
  ]
end

def marshal_load array
  initialize_visibility
  @dont_rename_initialize = nil
  @token_stream           = nil
  @aliases                = []
  @parent                 = nil
  @parent_name            = nil
  @parent_class           = nil
  @section                = nil
  @file                   = nil
  version        = array[0]
  @name          = array[1]
  @full_name     = array[2]
  @singleton     = array[3]
  @visibility    = array[4]
  @comment       = RDoc::Comment.from_document array[5]
  @call_seq      = array[6]
  @block_params  = array[7]
  #                      8 handled below
  @params        = array[9]
  #                      10 handled below
  @calls_super   = array[11]
  @parent_name   = array[12]
  @parent_title  = array[13]
  @section_title = array[14]
  @is_alias_for  = array[15]
  array[8].each do |new_name, document|
    add_alias RDoc::Alias.new(nil, @name, new_name, RDoc::Comment.from_document(document), @singleton)
  end
  @parent_name ||= if @full_name =~ /#/ then
                     $`
                   else
                     name = @full_name.split('::')
                     name.pop
                     name.join '::'
                   end
  @file = RDoc::TopLevel.new array[10] if version > 0
end

def name
  return @name if @name
  @name =
    @call_seq[/^.*?\.(\w+)/, 1] ||
    @call_seq[/^.*?(\w+)/, 1] ||
    @call_seq if @call_seq
end

def param_list
  if @call_seq then
    params = @call_seq.split("\n").last
    params = params.sub(/.*?\((.*)\)/, '\1')
    params = params.sub(/(\{|do)\s*\|([^|]*)\|.*/, ',\2')
  elsif @params then
    params = @params.sub(/\((.*)\)/, '\1')
    params << ",#{@block_params}" if @block_params
  elsif @block_params then
    params = @block_params
  else
    return []
  end
  if @block_params then
    # If this method has explicit block parameters, remove any explicit
    # &block
    params = params.sub(/,?\s*&\w+/, '')
  else
    params = params.sub(/\&(\w+)/, '\1')
  end
  params = params.gsub(/\s+/, '').split(',').reject(&:empty?)
  params.map { |param| param.sub(/=.*/, '') }
end

def param_seq
  if @call_seq then
    params = @call_seq.split("\n").last
    params = params.sub(/[^( ]+/, '')
    params = params.sub(/(\|[^|]+\|)\s*\.\.\.\s*(end|\})/, '\1 \2')
  elsif @params then
    params = @params.gsub(/\s*\#.*/, '')
    params = params.tr_s("\n ", " ")
    params = "(#{params})" unless params[0] == ?(
  else
    params = ''
  end
  if @block_params then
    # If this method has explicit block parameters, remove any explicit
    # &block
    params = params.sub(/,?\s*&\w+/, '')
    block = @block_params.tr_s("\n ", " ")
    if block[0] == ?(
      block = block.sub(/^\(/, '').sub(/\)/, '')
    end
    params << " { |#{block}| ... }"
  end
  params
end

def skip_description?
  has_call_seq? && call_seq.nil? && !!(is_alias_for || !aliases.empty?)
end

def store= store
  super
  @file = @store.add_file @file.full_name if @file
end

def superclass_method
  return unless @calls_super
  return @superclass_method if @superclass_method
  parent.each_ancestor do |ancestor|
    if method = ancestor.method_list.find { |m| m.name == @name } then
      @superclass_method = method
      break
    end
  end
  @superclass_method
end