Class: YARD::CodeObjects::Base Abstract

Inherits:
Object
  • Object
show all
Defined in:
lib/yard/code_objects/base.rb

Overview

This class is abstract.

This class should not be used directly. Instead, create a subclass that implements #path, #sep or #type. You might also need to register custom separators if #sep uses alternate separator tokens.

Base is the superclass of all code objects recognized by YARD. A code object is any entity in the Ruby language (class, method, module). A DSL might subclass Base to create a new custom object representing a new entity type.

Registry Integration

Any created object associated with a namespace is immediately registered with the registry. This allows the Registry to act as an identity map to ensure that no object is represented by more than one Ruby object in memory. A unique #path is essential for this identity map to work correctly.

Custom Attributes

Code objects allow arbitrary custom attributes to be set using the #[]= assignment method.

Namespaces

There is a special type of object called a “namespace”. These are subclasses of the NamespaceObject and represent Ruby entities that can have objects defined within them. Classically these are modules and classes, though a DSL might create a custom NamespaceObject to describe a specific set of objects.

Separators

Custom classes with different separator tokens should define their own separators using the NamespaceMapper#register_separator method. The standard Ruby separators have already been defined ('::', '#', '.', etc).

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(namespace, name) {|self| ... } ⇒ Base

Creates a new code object

Examples:

Create a method in the root namespace

CodeObjects::Base.new(:root, '#method') # => #<yardoc method #method>

Create class Z inside namespace X::Y

CodeObjects::Base.new(P("X::Y"), :Z) # or
CodeObjects::Base.new(Registry.root, "X::Y")

Parameters:

  • namespace (NamespaceObject)

    the namespace the object belongs in, Registry.root or :root should be provided if it is associated with the top level namespace.

  • name (Symbol, String)

    the name (or complex path) of the object.

Yields:

  • (self)

    a block to perform any extra initialization on the object

Yield Parameters:

  • self (Base)

    the newly initialized code object



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# File 'lib/yard/code_objects/base.rb', line 234

def initialize(namespace, name, *)
  if namespace && namespace != :root &&
     !namespace.is_a?(NamespaceObject) && !namespace.is_a?(Proxy)
    raise ArgumentError, "Invalid namespace object: #{namespace}"
  end

  @files = []
  @current_file_has_comments = false
  @name = name.to_sym
  @source_type = :ruby
  @visibility = :public
  @tags = []
  @docstrings = {}
  @docstring = Docstring.new!('', [], self)
  @namespace = nil
  self.namespace = namespace
  yield(self) if block_given?
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#dynamic_attr_nameObject #dynamic_attr_name=(value) ⇒ Object

Overloads:

  • #dynamic_attr_nameObject

    Returns the value of attribute named by the method attribute name

    Returns:

    • the value of attribute named by the method attribute name

    Raises:

    • (NoMethodError)

      if no method or custom attribute exists by the attribute name

    See Also:

  • #dynamic_attr_name=(value) ⇒ Object

    Returns value

    Parameters:

    • value

      a value to set

    Returns:

    • value

    See Also:



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# File 'lib/yard/code_objects/base.rb', line 368

def method_missing(meth, *args, &block)
  if meth.to_s =~ /=$/
    self[meth.to_s[0..-2]] = args.first
  elsif instance_variable_get("@#{meth}")
    self[meth]
  else
    super
  end
end

Instance Attribute Details

#base_docstringDocstring (readonly)

The non-localized documentation string associated with the object

Returns:

Since:

  • 0.8.4



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# File 'lib/yard/code_objects/base.rb', line 164

def base_docstring
  @base_docstring
end

#dynamicBoolean

Marks whether or not the method is conditionally defined at runtime

Returns:

  • (Boolean)

    true if the method is conditionally defined at runtime



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# File 'lib/yard/code_objects/base.rb', line 170

def dynamic
  @dynamic
end

#filesArray<String> (readonly)

The files the object was defined in. To add a file, use #add_file.

Returns:

See Also:



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# File 'lib/yard/code_objects/base.rb', line 137

def files
  @files
end

#groupString

Returns the group this object is associated with

Returns:

  • (String)

    the group this object is associated with

Since:

  • 0.6.0



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# File 'lib/yard/code_objects/base.rb', line 174

def group
  @group
end

#namespaceNamespaceObject Also known as: parent

The namespace the object is defined in. If the object is in the top level namespace, this is Registry.root

Returns:



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# File 'lib/yard/code_objects/base.rb', line 142

def namespace
  @namespace
end

#signatureString

The one line signature representing an object. For a method, this will be of the form “def meth(arguments…)”. This is usually the first source line.

Returns:

  • (String)

    a line of source



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# File 'lib/yard/code_objects/base.rb', line 159

def signature
  @signature
end

#sourceString?

The source code associated with the object

Returns:

  • (String, nil)

    source, if present, or nil



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# File 'lib/yard/code_objects/base.rb', line 146

def source
  @source
end

#source_typeSymbol

Language of the source code associated with the object. Defaults to :ruby.

Returns:

  • (Symbol)

    the language type



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# File 'lib/yard/code_objects/base.rb', line 152

def source_type
  @source_type
end

#visibilitySymbol

Returns the visibility of an object (:public, :private, :protected)

Returns:

  • (Symbol)

    the visibility of an object (:public, :private, :protected)



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# File 'lib/yard/code_objects/base.rb', line 181

def visibility
  @visibility
end

Class Method Details

.===(other) ⇒ Boolean

Compares the class with subclasses

Parameters:

  • other (Object)

    the other object to compare classes with

Returns:

  • (Boolean)

    true if other is a subclass of self



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# File 'lib/yard/code_objects/base.rb', line 215

def ===(other)
  other.is_a?(self)
end

.new(namespace, name, *args) {|obj| ... } ⇒ Base

Allocates a new code object

Yields:

  • (obj)

Returns:

Raises:

  • (ArgumentError)

See Also:



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# File 'lib/yard/code_objects/base.rb', line 189

def new(namespace, name, *args, &block)
  raise ArgumentError, "invalid empty object name" if name.to_s.empty?
  if namespace.is_a?(ConstantObject)
    namespace = Proxy.new(namespace.namespace, namespace.value)
  end

  if name.to_s[0, 2] == NSEP
    name = name.to_s[2..-1]
    namespace = Registry.root
  end

  if name =~ /(?:#{NSEPQ})([^:]+)$/
    return new(Proxy.new(namespace, $`), $1, *args, &block)
  end

  obj = super(namespace, name, *args)
  existing_obj = Registry.at(obj.path)
  obj = existing_obj if existing_obj && existing_obj.class == self
  yield(obj) if block_given?
  obj
end

Instance Method Details

#[](key) ⇒ Object?

Accesses a custom attribute on the object

Parameters:

  • key (#to_s)

    the name of the custom attribute

Returns:

  • (Object, nil)

    the custom attribute or nil if not found.

See Also:



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# File 'lib/yard/code_objects/base.rb', line 338

def [](key)
  if respond_to?(key)
    send(key)
  elsif instance_variable_defined?("@#{key}")
    instance_variable_get("@#{key}")
  end
end

#[]=(key, value) ⇒ void

This method returns an undefined value.

Sets a custom attribute on the object

Parameters:

  • key (#to_s)

    the name of the custom attribute

  • value (Object)

    the value to associate

See Also:



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# File 'lib/yard/code_objects/base.rb', line 351

def []=(key, value)
  if respond_to?("#{key}=")
    send("#{key}=", value)
  else
    instance_variable_set("@#{key}", value)
  end
end

#add_file(file, line = nil, has_comments = false) ⇒ Object

Associates a file with a code object, optionally adding the line where it was defined. By convention, '<stdin>' should be used to associate code that comes form standard input.

Parameters:

  • file (String)

    the filename ('<stdin>' for standard input)

  • line (Fixnum, nil) (defaults to: nil)

    the line number where the object lies in the file

  • has_comments (Boolean) (defaults to: false)

    whether or not the definition has comments associated. This will allow #file to return the definition where the comments were made instead of any empty definitions that might have been parsed before (module namespaces for instance).

Raises:

  • (ArgumentError)


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# File 'lib/yard/code_objects/base.rb', line 286

def add_file(file, line = nil, has_comments = false)
  raise(ArgumentError, "file cannot be nil or empty") if file.nil? || file == ''
  obj = [file.to_s, line]
  return if files.include?(obj)
  if has_comments && !@current_file_has_comments
    @current_file_has_comments = true
    @files.unshift(obj)
  else
    @files << obj # back of the line
  end
end

#add_tag(*tags) ⇒ Object

Add tags to the #docstring

See Also:

Since:

  • 0.8.4



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# File 'lib/yard/code_objects/base.rb', line 545

def add_tag(*tags)
  @docstrings.clear
  @docstring.add_tag(*tags)
end

#copy_to(other) ⇒ Base

Copies all data in this object to another code object, except for uniquely identifying information (path, namespace, name, scope).

Parameters:

  • other (Base)

    the object to copy data to

Returns:

  • (Base)

    the other object

Since:

  • 0.8.0



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# File 'lib/yard/code_objects/base.rb', line 259

def copy_to(other)
  copyable_attributes.each do |ivar|
    ivar = "@#{ivar}"
    other.instance_variable_set(ivar, instance_variable_get(ivar))
  end
  other.docstring = @docstring.to_raw
  other
end

#copyable_attributesArray<String> (protected)

Override this method if your code object subclass does not allow copying of certain attributes.

Returns:

  • (Array<String>)

    the list of instance variable names (without “@” prefix) that should be copied when #copy_to is called

See Also:

Since:

  • 0.8.0



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# File 'lib/yard/code_objects/base.rb', line 571

def copyable_attributes
  vars = instance_variables.map {|ivar| ivar.to_s[1..-1] }
  vars -= %w(docstring docstrings namespace name path)
  vars
end

#docstring(locale = I18n::Locale.default) ⇒ Docstring

The documentation string associated with the object

Parameters:

  • locale (String, I18n::Locale) (defaults to: I18n::Locale.default)

    (I18n::Locale.default) the locale of the documentation string.

Returns:



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# File 'lib/yard/code_objects/base.rb', line 397

def docstring(locale = I18n::Locale.default)
  if locale.nil?
    @docstring.resolve_reference
    return @docstring
  end

  if locale.is_a?(String)
    locale_name = locale
    locale = nil
  else
    locale_name = locale.name
  end
  @docstrings[locale_name] ||=
    translate_docstring(locale || Registry.locale(locale_name))
end

#docstring=(comments) ⇒ Object

Attaches a docstring to a code object by parsing the comments attached to the statement and filling the #tags and #docstring methods with the parsed information.

Parameters:

  • comments (String, Array<String>, Docstring)

    the comments attached to the code object to be parsed into a docstring and meta tags.



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# File 'lib/yard/code_objects/base.rb', line 419

def docstring=(comments)
  @docstrings.clear
  @docstring = Docstring === comments ?
    comments : Docstring.new(comments, self)
end

#dynamic?Boolean

Is the object defined conditionally at runtime?

Returns:

  • (Boolean)

See Also:



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# File 'lib/yard/code_objects/base.rb', line 178

def dynamic?; @dynamic end

#equal?(other) ⇒ Boolean Also known as: ==, eql?

Tests if another object is equal to this, including a proxy

Parameters:

  • other (Base, Proxy)

    if other is a Proxy, tests if the paths are equal

Returns:

  • (Boolean)

    whether or not the objects are considered the same



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# File 'lib/yard/code_objects/base.rb', line 318

def equal?(other)
  if other.is_a?(Base) || other.is_a?(Proxy)
    path == other.path
  else
    super
  end
end

#fileString

Returns the filename the object was first parsed at, taking definitions with docstrings first.

Returns:



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# File 'lib/yard/code_objects/base.rb', line 302

def file
  @files.first ? @files.first[0] : nil
end

#format(options = {}) ⇒ String

Renders the object using the templating system.

Examples:

Formats a class in plaintext

puts P('MyClass').format

Formats a method in html with rdoc markup

puts P('MyClass#meth').format(:format => :html, :markup => :rdoc)

Parameters:

  • options (Hash) (defaults to: {})

    a set of options to pass to the template

Options Hash (options):

  • :format (Symbol) — default: :text

    :html, :text or another output format

  • :template (Symbol) — default: :default

    a specific template to use

  • :markup (Symbol) — default: nil

    the markup type (:rdoc, :markdown, :textile)

  • :serializer (Serializers::Base) — default: nil

    see Serializers

Returns:

  • (String)

    the rendered template

See Also:

  • Templates::Engine#render


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# File 'lib/yard/code_objects/base.rb', line 494

def format(options = {})
  options = options.merge(:object => self)
  options = options.merge(:type => type) unless options[:type]
  Templates::Engine.render(options)
end

#has_tag?(name) ⇒ Boolean

Tests if the #docstring has a tag

Returns:

  • (Boolean)

See Also:



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# File 'lib/yard/code_objects/base.rb', line 540

def has_tag?(name); docstring.has_tag?(name) end

#hashInteger

Returns the object's hash value (for equality checking)

Returns:

  • (Integer)

    the object's hash value (for equality checking)



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# File 'lib/yard/code_objects/base.rb', line 329

def hash; path.hash end

#inspectString

Inspects the object, returning the type and path

Returns:

  • (String)

    a string describing the object



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# File 'lib/yard/code_objects/base.rb', line 502

def inspect
  "#<yardoc #{type} #{path}>"
end

#lineFixnum?

Returns the line the object was first parsed at (or nil)

Returns:

  • (Fixnum)

    the line where the object was first defined.

  • (nil)

    if there is no line associated with the object



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# File 'lib/yard/code_objects/base.rb', line 310

def line
  @files.first ? @files.first[1] : nil
end

#name(prefix = false) ⇒ Symbol, String

The name of the object

Parameters:

  • prefix (Boolean) (defaults to: false)

    whether to show a prefix. Implement this in a subclass to define how the prefix is showed.

Returns:

  • (Symbol)

    if prefix is false, the symbolized name

  • (String)

    if prefix is true, prefix + the name as a String. This must be implemented by the subclass.



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# File 'lib/yard/code_objects/base.rb', line 274

def name(prefix = false)
  prefix ? @name.to_s : (defined?(@name) && @name)
end

#pathString Also known as: to_s

Represents the unique path of the object. The default implementation joins the path of #namespace with #name via the value of #sep. Custom code objects should ensure that the path is unique to the code object by either overriding #sep or this method.

Examples:

The path of an instance method

MethodObject.new(P("A::B"), :c).path # => "A::B#c"

Returns:

  • (String)

    the unique path of the object

See Also:



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# File 'lib/yard/code_objects/base.rb', line 442

def path
  @path ||= if parent && !parent.root?
              [parent.path, name.to_s].join(sep)
            else
              name.to_s
            end
end

#relative_path(other) ⇒ String

Returns the shortest relative path from this object to other

Parameters:

  • other (Base, String)

    another code object (or object path)

Returns:

  • (String)

    the shortest relative path from this object to other

Since:

  • 0.5.3



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# File 'lib/yard/code_objects/base.rb', line 464

def relative_path(other)
  other = Registry.at(other) if String === other && Registry.at(other)
  same_parent = false
  if other.respond_to?(:path)
    same_parent = other.parent == parent
    other = other.path
  end
  return other unless namespace
  common = [path, other].join(" ").match(/^(\S*)\S*(?: \1\S*)*$/)[1]
  common = path unless common =~ /(\.|::|#)$/
  common = common.sub(/(\.|::|#)[^:#\.]*?$/, '') if same_parent
  suffix = %w(. :).include?(common[-1, 1]) || other[common.size, 1] == '#' ?
    '' : '(::|\.)'
  result = other.sub(/^#{Regexp.quote common}#{suffix}/, '')
  result.empty? ? other : result
end

#root?Boolean

Returns whether or not this object is a RootObject

Returns:

  • (Boolean)

    whether or not this object is a RootObject



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# File 'lib/yard/code_objects/base.rb', line 551

def root?; false end

#sepString

Override this method with a custom component separator. For instance, MethodObject implements sep as '#' or '.' (depending on if the method is instance or class respectively). #path depends on this value to generate the full path in the form: namespace.path + sep + name

Returns:

  • (String)

    the component that separates the namespace path and the name (default is NSEP)



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# File 'lib/yard/code_objects/base.rb', line 560

def sep; NSEP end

#tag(name) ⇒ Object

Gets a tag from the #docstring

See Also:



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# File 'lib/yard/code_objects/base.rb', line 532

def tag(name); docstring.tag(name) end

#tags(name = nil) ⇒ Object

Gets a list of tags from the #docstring

See Also:



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# File 'lib/yard/code_objects/base.rb', line 536

def tags(name = nil); docstring.tags(name) end

#titleString

Note:

Override this method if your object has a special title that does not match the #path attribute value. This title will be used when linking or displaying the object.

Returns the display title for an object

Returns:

  • (String)

    the display title for an object

See Also:

  • YARD::CodeObjects::Base.00.80.8.4


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# File 'lib/yard/code_objects/base.rb', line 457

def title
  path
end

#to_arynil

Returns this object does not turn into an array

Returns:

  • (nil)

    this object does not turn into an array



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# File 'lib/yard/code_objects/base.rb', line 332

def to_ary; nil end

#typeSymbol

Default type is the lowercase class name without the “Object” suffix. Override this method to provide a custom object type

Returns:

  • (Symbol)

    the type of code object this represents



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# File 'lib/yard/code_objects/base.rb', line 429

def type
  self.class.name.split('::').last.gsub(/Object$/, '').downcase.to_sym
end