Module: YARD::Handlers::Ruby::StructHandlerMethods

Includes:
CodeObjects
Included in:
ClassHandler, ConstantHandler, Legacy::ClassHandler, Legacy::ConstantHandler
Defined in:
lib/yard/handlers/ruby/struct_handler_methods.rb

Overview

Helper methods to parse @attr_* tags on a class.

Since:

  • 0.5.6

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

Instance Method Summary collapse

Instance Method Details

#add_reader_tags(klass, new_method, member) ⇒ String

Creates the auto-generated docstring for the getter method of a struct’s member. This is used so the generated documentation will look just like that of an attribute defined using attr_accessor.

Parameters:

  • klass (ClassObject) —

    the class whose members we’re working with

  • member (String) —

    the name of the member we’re generating documentation for

Returns:

  • (String) —

    a docstring to be attached to the getter method for this member

Since:

  • 0.5.6



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# File 'lib/yard/handlers/ruby/struct_handler_methods.rb', line 60

def add_reader_tags(klass, new_method, member)
  member_tag = member_tag_for_member(klass, member, :read)
  return_type = return_type_from_tag(member_tag)
  getter_doc_text = member_tag ? member_tag.text : "Returns the value of attribute #{member}"
  new_method.docstring.replace(getter_doc_text)
  new_method.docstring.add_tag YARD::Tags::Tag.new(:return, "the current value of #{member}", return_type)
end

#add_writer_tags(klass, new_method, member) ⇒ String

Creates the auto-generated docstring for the setter method of a struct’s member. This is used so the generated documentation will look just like that of an attribute defined using attr_accessor.

Parameters:

  • klass (ClassObject) —

    the class whose members we’re working with

  • member (String) —

    the name of the member we’re generating documentation for

Returns:

  • (String) —

    a docstring to be attached to the setter method for this member

Since:

  • 0.5.6



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# File 'lib/yard/handlers/ruby/struct_handler_methods.rb', line 75

def add_writer_tags(klass, new_method, member)
  member_tag = member_tag_for_member(klass, member, :write)
  return_type = return_type_from_tag(member_tag)
  setter_doc_text = member_tag ? member_tag.text : "Sets the attribute #{member}"
  new_method.docstring.replace(setter_doc_text)
  new_method.docstring.add_tag YARD::Tags::Tag.new(:param, "the value to set the attribute #{member} to.", return_type, "value")
  new_method.docstring.add_tag YARD::Tags::Tag.new(:return, "the newly set value", return_type)
end

#create_attributes(klass, members) ⇒ Object

Creates the given member methods and attaches them to the given ClassObject.

Parameters:

  • klass (ClassObject) —

    the class to generate attributes for

  • members (Array<String>) —

    a list of member names

Since:

  • 0.5.6



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# File 'lib/yard/handlers/ruby/struct_handler_methods.rb', line 132

def create_attributes(klass, members)
  # For each parameter, add reader and writers
  members.each do |member|
    klass.attributes[:instance][member] = SymbolHash[:read => nil, :write => nil]
    create_writer klass, member if create_member_method?(klass, member, :write)
    create_reader klass, member if create_member_method?(klass, member, :read)
  end
end

#create_class(classname, superclass) ⇒ ClassObject

Creates and registers a class object with the given name and superclass name. Returns it for further use.

Parameters:

  • classname (String) —

    the name of the class

  • superclass (String) —

    the name of the superclass

Returns:

  • (ClassObject) —

    the class object for further processing/method attaching

Since:

  • 0.5.6



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# File 'lib/yard/handlers/ruby/struct_handler_methods.rb', line 90

def create_class(classname, superclass)
  register ClassObject.new(namespace, classname) do |o|
    o.superclass = superclass if superclass
    o.superclass.type = :class if o.superclass.is_a?(Proxy)
  end
end

#create_member_method?(klass, member, type = :read) ⇒ Boolean

Determines whether to create an attribute method based on the class’s tags.

Parameters:

  • klass (ClassObject) —

    the class whose tags we’re searching

  • member (String) —

    the name of the struct member we need

  • type (Symbol) (defaults to: :read) —

    (:read) reader method, or writer method?

Returns:

  • (Boolean) —

    should the attribute be created?

Since:

  • 0.5.6



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# File 'lib/yard/handlers/ruby/struct_handler_methods.rb', line 35

def create_member_method?(klass, member, type = :read)
  return true if (klass.tags(:attr) + klass.tags(:attr_reader) + klass.tags(:attr_writer)).empty?
  return true if member_tag_for_member(klass, member, type)
  return !member_tag_for_member(klass, member, :write) if type == :read
  return !member_tag_for_member(klass, member, :read)
end

#create_reader(klass, member) ⇒ Object

Creates the getter (reader) method and attaches it to the class as an attribute. Also sets up the docstring to prettify the documentation output.

Parameters:

  • klass (ClassObject) —

    the class to attach the method to

  • member (String) —

    the name of the member we’re generating a method for

Since:

  • 0.5.6



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# File 'lib/yard/handlers/ruby/struct_handler_methods.rb', line 119

def create_reader(klass, member)
  new_meth = register MethodObject.new(klass, member, :instance) do |o|
    o.signature ||= "def #{member}"
    o.source ||= "#{o.signature}\n  @#{member}\nend"
  end
  add_reader_tags(klass, new_meth, member)
  klass.attributes[:instance][member][:read] = new_meth
end

#create_writer(klass, member) ⇒ Object

Creates the setter (writer) method and attaches it to the class as an attribute. Also sets up the docstring to prettify the documentation output.

Parameters:

  • klass (ClassObject) —

    the class to attach the method to

  • member (String) —

    the name of the member we’re generating a method for

Since:

  • 0.5.6



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# File 'lib/yard/handlers/ruby/struct_handler_methods.rb', line 102

def create_writer(klass, member)
  # We want to convert these members into attributes just like
  # as if they were declared using attr_accessor.
  new_meth = register MethodObject.new(klass, "#{member}=", :instance) do |o|
    o.parameters = [['value', nil]]
    o.signature ||= "def #{member}=(value)"
    o.source ||= "#{o.signature}\n  @#{member} = value\nend"
  end
  add_writer_tags(klass, new_meth, member)
  klass.attributes[:instance][member][:write] = new_meth
end

#member_tag_for_member(klass, member, type = :read) ⇒ Tags::Tag?

Extracts the user’s defined @member tag for a given class and its member. Returns nil if the user did not define a @member tag for this struct entry.

Parameters:

  • klass (ClassObject) —

    the class whose tags we’re searching

  • member (String) —

    the name of the struct member we need

  • type (Symbol) (defaults to: :read) —

    reader method, or writer method?

Returns:

  • (Tags::Tag, nil) —

    the tag matching the request, or nil if not found

Since:

  • 0.5.6



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# File 'lib/yard/handlers/ruby/struct_handler_methods.rb', line 14

def member_tag_for_member(klass, member, type = :read)
  specific_tag = type == :read ? :attr_reader : :attr_writer
  (klass.tags(specific_tag) + klass.tags(:attr)).find {|tag| tag.name == member}
end

#members_from_tags(klass) ⇒ Array<String>

Retrieves all members defined in @attr* tags

Parameters:

  • klass (ClassObject) —

    the class with the attributes

Returns:

  • (Array<String>) —

    the list of members defined as attributes on the class

Since:

  • 0.5.6



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# File 'lib/yard/handlers/ruby/struct_handler_methods.rb', line 23

def members_from_tags(klass)
  tags = klass.tags(:attr) + klass.tags(:attr_reader) + klass.tags(:attr_writer)
  tags.map {|t| t.name }.uniq
end

#return_type_from_tag(member_tag) ⇒ String

Gets the return type for the member in a nicely formatted string. Used to be injected into auto-generated docstrings.

Parameters:

  • klass (ClassObject) —

    the class whose tags we’re searching

  • member (String) —

    the name of the struct member whose return type we need

Returns:

  • (String) —

    the user-declared type of the struct member, or [Object] if the user did not define a type for this member.

Since:

  • 0.5.6



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# File 'lib/yard/handlers/ruby/struct_handler_methods.rb', line 49

def return_type_from_tag(member_tag)
  (member_tag && member_tag.types) ? member_tag.types : "Object"
end