Class: YARD::Handlers::Ruby::Legacy::MethodHandler

Inherits:
Base
  • Object
show all
Defined in:
lib/yard/handlers/ruby/legacy/method_handler.rb

Overview

Handles a method definition

Constant Summary

Constants included from Parser::Ruby::Legacy::RubyToken

Parser::Ruby::Legacy::RubyToken::EXPR_ARG, Parser::Ruby::Legacy::RubyToken::EXPR_BEG, Parser::Ruby::Legacy::RubyToken::EXPR_CLASS, Parser::Ruby::Legacy::RubyToken::EXPR_DOT, Parser::Ruby::Legacy::RubyToken::EXPR_END, Parser::Ruby::Legacy::RubyToken::EXPR_FNAME, Parser::Ruby::Legacy::RubyToken::EXPR_MID, Parser::Ruby::Legacy::RubyToken::NEWLINE_TOKEN, Parser::Ruby::Legacy::RubyToken::TkReading2Token, Parser::Ruby::Legacy::RubyToken::TkSymbol2Token

Constants included from CodeObjects

CodeObjects::BUILTIN_ALL, CodeObjects::BUILTIN_CLASSES, CodeObjects::BUILTIN_EXCEPTIONS, CodeObjects::BUILTIN_EXCEPTIONS_HASH, CodeObjects::BUILTIN_MODULES, CodeObjects::CONSTANTMATCH, CodeObjects::CSEP, CodeObjects::CSEPQ, CodeObjects::ISEP, CodeObjects::ISEPQ, CodeObjects::METHODMATCH, CodeObjects::METHODNAMEMATCH, CodeObjects::NAMESPACEMATCH, CodeObjects::NSEP, CodeObjects::NSEPQ

Instance Method Summary collapse

Constructor Details

This class inherits a constructor from YARD::Handlers::Base

Instance Method Details

#process ⇒ void

This method returns an undefined value.

Main processing callback



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# File 'lib/yard/handlers/ruby/legacy/method_handler.rb', line 5

process do
  nobj = namespace
  mscope = scope

  if statement.tokens.to_s =~ /^def\s+(#{METHODMATCH})(?:(?:\s+|\s*\()(.*)(?:\)\s*$)?)?/m
    meth, args = $1, $2
    meth.gsub!(/\s+/,'')
    args = tokval_list(YARD::Parser::Ruby::Legacy::TokenList.new(args), :all)
    args.map! {|a| k, v = *a.split('=', 2); [k.strip, (v ? v.strip : nil)] } if args
  else
    raise YARD::Parser::UndocumentableError, "method: invalid name"
  end

  # Class method if prefixed by self(::|.) or Module(::|.)
  if meth =~ /(?:#{NSEPQ}|#{CSEPQ})([^#{NSEP}#{CSEPQ}]+)$/
    mscope, meth, prefix = :class, $1, $`
    if prefix =~ /^[a-z]/ && prefix != "self"
      raise YARD::Parser::UndocumentableError, 'method defined on object instance'
    end
    nobj = P(namespace, prefix) unless prefix == "self"
  end

  nobj = P(namespace, nobj.value) while nobj.type == :constant
  obj = register MethodObject.new(nobj, meth, mscope) do |o|
    o.explicit = true
    o.parameters = args
  end

  # delete any aliases referencing old method
  nobj.aliases.each do |aobj, name|
    next unless name == obj.name
    nobj.aliases.delete(aobj)
  end if nobj.is_a?(NamespaceObject)

  if mscope == :instance && meth == "initialize"
    unless obj.has_tag?(:return)
      obj.docstring.add_tag(YARD::Tags::Tag.new(:return,
        "a new instance of #{namespace.name}", namespace.name.to_s))
    end
  elsif mscope == :class && obj.docstring.blank? && %w(inherited included
      extended method_added method_removed method_undefined).include?(meth)
    obj.docstring.add_tag(YARD::Tags::Tag.new(:private, nil))
  elsif meth.to_s =~ /\?$/
    if obj.tag(:return) && (obj.tag(:return).types || []).empty?
      obj.tag(:return).types = ['Boolean']
    elsif obj.tag(:return).nil?
      unless obj.tags(:overload).any? {|overload| overload.tag(:return) }
        obj.docstring.add_tag(YARD::Tags::Tag.new(:return, "", "Boolean"))
      end
    end
  end

  if obj.has_tag?(:option)
    # create the options parameter if its missing
    obj.tags(:option).each do |option|
      expected_param = option.name
      unless obj.tags(:param).find {|x| x.name == expected_param }
        new_tag = YARD::Tags::Tag.new(:param, "a customizable set of options", "Hash", expected_param)
        obj.docstring.add_tag(new_tag)
      end
    end
  end

  if info = obj.attr_info
    if meth.to_s =~ /=$/ # writer
      info[:write] = obj if info[:read]
    else
      info[:read] = obj if info[:write]
    end
  end

  parse_block(:owner => obj) # mainly for yield/exceptions
end