Class: Yadriggy::Def

Inherits:
Parameters show all
Defined in:
lib/yadriggy/ast.rb

Overview

Method definition or a singular method definition.

Instance Attribute Summary collapse

Attributes inherited from Parameters

#block_param, #keywords, #optionals, #params, #params_after_rest, #rest_of_keywords, #rest_of_params

Attributes inherited from ASTnode

#parent, #usertype

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Parameters

#initialize_params

Methods included from AstHelper

#has_tag?, #to_node, #to_nodes

Methods inherited from ASTnode

#add_child, #add_children, #const_value, #const_value_in_class, #get_context_class, #get_receiver_object, #is_proc?, #pretty_print, #root, #source_location, #source_location_string, #value, #value_in_class

Constructor Details

#initialize(sexp) ⇒ Def

Returns a new instance of Def.



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# File 'lib/yadriggy/ast.rb', line 1585

def initialize(sexp)
  if sexp[0] == :def
    @singular = nil
    offset = 0
  else
    @singular = to_node(sexp[1])
    add_child(@singular)
    offset = 2
  end

  def_name = sexp[1 + offset]
  @name = if def_name[0] == :@op
            to_node(def_name)
          else
            to_node(has_tag?(def_name, :@ident))
          end
  add_child(@name)

  params = sexp[2 + offset]
  if !params.nil? && params[0] == :paren
    super(params[1])
  else
    super(params)
  end

  bodystmt = has_tag?(sexp[3 + offset], :bodystmt)
  @body = Exprs.make(bodystmt[1])
  @rescue = Rescue.make(bodystmt[2], bodystmt[3], bodystmt[4])
  add_child(@body)
  add_child(@rescue)
end

Instance Attribute Details

#body ⇒ Exprs|ASTnode (readonly)

Returns the body.

Returns:



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# File 'lib/yadriggy/ast.rb', line 1579

def body
  @body
end

#name ⇒ Identifier (readonly)

Returns the method name.

Returns:



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# File 'lib/yadriggy/ast.rb', line 1577

def name
  @name
end

#rescue ⇒ Rescue|nil (readonly)

Returns the rescue clause.

Returns:

  • (Rescue|nil) —

    the rescue clause.



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# File 'lib/yadriggy/ast.rb', line 1581

def rescue
  @rescue
end

#singular ⇒ ASTnode|nil (readonly)

Returns the object if the definition is a singular method.

Returns:

  • (ASTnode|nil) —

    the object if the definition is a singular method.



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# File 'lib/yadriggy/ast.rb', line 1575

def singular
  @singular
end

Class Method Details

.tags ⇒ Object 



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# File 'lib/yadriggy/ast.rb', line 1583

def self.tags() [:def, :defs] end

Instance Method Details

#accept(evaluator) ⇒ void

This method returns an undefined value.

A method for Visitor pattern.

Parameters:

  • evaluator (Eval) —

    the visitor of Visitor pattern.



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# File 'lib/yadriggy/ast.rb', line 1620

def accept(evaluator)
  evaluator.define(self)
end