Class: YARD::Tags::Directive Abstract

Inherits:
Object
  • Object
show all
Defined in:
lib/yard/tags/directives.rb

Overview

This class is abstract.

Subclasses should implement #call.

The base directive class. Subclass this class to create a custom directive, registering it with Library.define_directive. Directive classes are executed via the #call method, which perform all directive processing on the object.

If processing occurs within a handler, the #handler attribute is available to access more information about parsing context and state. Handlers are only available when parsing from Parser::SourceParser, not when parsing directly from DocstringParser. If the docstring is attached to an object declaration, #object will be set and available to modify the generated code object directly. Note that both of these attributes may be nil, and directives should test their existence before attempting to use them.

See Also:

Since:

  • 0.8.0

Instance Attribute Summary collapse

Parser callbacks collapse

Instance Method Summary collapse

Constructor Details

#initialize(tag, parser) ⇒ Directive

Returns a new instance of Directive.

Parameters:

  • tag (Tag) —

    the meta-data tag containing all input to the docstring

  • parser (DocstringParser) —

    the docstring parser object

Since:

  • 0.8.0



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# File 'lib/yard/tags/directives.rb', line 55

def initialize(tag, parser)
  self.tag = tag
  self.parser = parser
  self.expanded_text = nil
end

Instance Attribute Details

#expanded_text ⇒ String?

Set this field to replace the directive definition inside of a docstring with arbitrary text. For instance, the MacroDirective uses this field to expand its macro data in place of the call to a @!macro.

Returns:

  • (String) —

    the text to expand in the original docstring in place of this directive definition.

  • (nil) —

    if no expansion should take place for this directive

Since:

  • 0.8.0



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# File 'lib/yard/tags/directives.rb', line 34

def expanded_text
  @expanded_text
end

#handler ⇒ Handlers::Base? (readonly)

Returns the handler object the docstring parser might be attached to. May be nil. Only available when parsing through Parser::SourceParser.

Returns:

Since:

  • 0.8.0



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# File 'lib/yard/tags/directives.rb', line 49

def handler; parser.handler end

#object ⇒ CodeObjects::Base? (readonly)

Returns the object the parent docstring is attached to. May be nil.

Returns:

  • (CodeObjects::Base, nil) —

    the object the parent docstring is attached to. May be nil.

Since:

  • 0.8.0



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# File 'lib/yard/tags/directives.rb', line 43

def object; parser.object end

#parser ⇒ DocstringParser (protected)

Returns the parser that is parsing all tag information out of the docstring.

Returns:

  • (DocstringParser) —

    the parser that is parsing all tag information out of the docstring

Since:

  • 0.8.0



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# File 'lib/yard/tags/directives.rb', line 38

def parser
  @parser
end

#tag ⇒ Tag

Returns the meta-data tag containing data input to the directive.

Returns:

  • (Tag) —

    the meta-data tag containing data input to the directive

Since:

  • 0.8.0



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# File 'lib/yard/tags/directives.rb', line 25

def tag
  @tag
end

Instance Method Details

#after_parse ⇒ void

This method returns an undefined value.

Called after parsing all directives and tags in the docstring. Used to perform any cleanup after all directives perform their main task.

Since:

  • 0.8.0



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# File 'lib/yard/tags/directives.rb', line 74

def after_parse; end

#call ⇒ void

This method is abstract.

implement this method to perform all data processing for the directive.

This method returns an undefined value.

Called when processing the directive. Subclasses should implement this method to perform all functionality of the directive.

Raises:

  • (NotImplementedError)

Since:

  • 0.8.0



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# File 'lib/yard/tags/directives.rb', line 69

def call; raise NotImplementedError end