Class: YARD::Handlers::Ruby::AliasHandler

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

Overview

Handles alias and alias_method calls

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 Attribute Summary

Attributes inherited from Base

#extra_state, #globals, #namespace, #owner, #parser, #scope, #statement, #visibility

Instance Method Summary collapse

Methods inherited from Base

#call_params, #caller_method, handles?, meta_type, method_call, #parse_block

Methods included from Parser::Ruby

#s

Methods inherited from Base

#call_params, #caller_method, clear_subclasses, #ensure_loaded!, #expand_macro, #find_or_create_macro, handlers, handles, handles?, in_file, #initialize, matches_file?, namespace_only, namespace_only?, #parse_block, process, #push_state, #register, subclasses

Constructor Details

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

Instance Method Details

#process ⇒ void

This method returns an undefined value.

Main processing callback



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# File 'lib/yard/handlers/ruby/alias_handler.rb', line 6

process do
  names = []
  if statement.type == :alias
    names = statement.map {|o| o.jump(:ident, :op, :kw, :const).source }
  elsif statement.call?
    statement.parameters(false).each do |obj|
      case obj.type
      when :symbol_literal
        names << obj.jump(:ident, :op, :kw, :const).source
      when :string_literal
        names << obj.jump(:string_content).source
      end
    end
  end
  raise YARD::Parser::UndocumentableError, "alias/alias_method" if names.size != 2

  new_meth, old_meth = names[0].to_sym, names[1].to_sym
  old_obj = namespace.child(:name => old_meth, :scope => scope)
  new_obj = register MethodObject.new(namespace, new_meth, scope) do |o|
    o.visibility = visibility
    o.scope = scope
    o.add_file(parser.file, statement.line)
  end

  if old_obj
    new_obj.signature = old_obj.signature
    new_obj.source = old_obj.source
    new_obj.docstring = old_obj.docstring + YARD::Docstring.new(statement.comments)
    new_obj.docstring.line_range = statement.comments_range
    new_obj.docstring.hash_flag = statement.comments_hash_flag
    new_obj.docstring.object = new_obj
  else
    new_obj.signature = "def #{new_meth}" # this is all we know.
  end

  namespace.aliases[new_obj] = old_meth
end