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

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

Overview

Handles attr_* statements in modules/classes

Constant Summary

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 Parser::Ruby

#s

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



10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
# File 'lib/yard/handlers/ruby/attribute_handler.rb', line 10

process do
  return if statement.type == :var_ref || statement.type == :vcall
  read = true
  write = false
  params = statement.parameters(false).dup

  # Change read/write based on attr_reader/writer/accessor
  case statement.method_name(true)
  when :attr
    # In the case of 'attr', the second parameter (if given) isn't a symbol.
    if params.size == 2
      write = true if params.pop == s(:var_ref, s(:kw, "true"))
    end
  when :attr_accessor
    write = true
  when :attr_reader
    # change nothing
  when :attr_writer
    read = false
    write = true
  end

  # Add all attributes
  validated_attribute_names(params).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}\n@param 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

#validated_attribute_names(params) ⇒ Array<String> (protected)

Strips out any non-essential arguments from the attr statement.

Parameters:

Returns:

Raises:



75
76
77
78
79
80
81
82
83
84
85
86
# File 'lib/yard/handlers/ruby/attribute_handler.rb', line 75

def validated_attribute_names(params)
  params.map do |obj|
    case obj.type
    when :symbol_literal
      obj.jump(:ident, :op, :kw, :const).source
    when :string_literal
      obj.jump(:string_content).source
    else
      raise YARD::Parser::UndocumentableError, obj.source
    end
  end
end