Class: YARD::Handlers::Ruby::Legacy::AttributeHandler

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

Overview

Handles attr_* statements in modules/classes

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::CONSTANTSTART, CodeObjects::CSEP, CodeObjects::CSEPQ, CodeObjects::ISEP, CodeObjects::ISEPQ, CodeObjects::METHODMATCH, CodeObjects::METHODNAMEMATCH, CodeObjects::NAMESPACEMATCH, CodeObjects::NSEP, CodeObjects::NSEPQ

Instance Method Summary collapse

Methods included from CodeObjects::NamespaceMapper

#clear_separators, #default_separator, #register_separator, #separators, #separators_for_type, #separators_match, #types_for_separator

Constructor Details

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

Instance Method Details

#processvoid

This method returns an undefined value.

Main processing callback


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# File 'lib/yard/handlers/ruby/legacy/attribute_handler.rb', line 7

process do
  begin
    attr_type   = statement.tokens.first.text.to_sym
    symbols     = tokval_list statement.tokens[2..-1], :attr, TkTRUE, TkFALSE
    read = true
    write = false
  rescue SyntaxError
    raise YARD::Parser::UndocumentableError, attr_type
  end

  # Change read/write based on attr_reader/writer/accessor

  case attr_type
  when :attr
    # In the case of 'attr', the second parameter (if given) isn't a symbol.

    write = symbols.pop if symbols.size == 2
  when :attr_accessor
    write = true
  when :attr_reader
    # change nothing

  when :attr_writer
    read = false
    write = true
  end

  # Add all attributes

  symbols.each do |name|
    namespace.attributes[scope][name] = SymbolHash[:read => nil, :write => nil]

    # Show their methods as well

    {:read => name, :write => "#{name}="}.each do |type, meth|
      if type == :read ? read : write
        o = MethodObject.new(namespace, meth, scope)
        if type == :write
          o.parameters = [['value', nil]]
          src = "def #{meth}(value)"
          full_src = "#{src}\n  @#{name} = value\nend"
          doc = "Sets the attribute #{name}\[email protected] value the value to set the attribute #{name} to."
        else
          src = "def #{meth}"
          full_src = "#{src}\n  @#{name}\nend"
          doc = "Returns the value of attribute #{name}"
        end
        o.source ||= full_src
        o.signature ||= src
        register(o)
        o.docstring = doc if o.docstring.blank?(false)

        # Regsiter the object explicitly

        namespace.attributes[scope][name][type] = o
      else
        obj = namespace.children.find {|other| other.name == meth.to_sym && other.scope == scope }

        # register an existing method as attribute

        namespace.attributes[scope][name][type] = obj if obj
      end
    end
  end
end