Class: Yadriggy::Parameters Abstract

Inherits:
ASTnode
  • Object
show all
Includes:
AstHelper
Defined in:
lib/yadriggy/ast.rb

Overview

This class is abstract.

Direct Known Subclasses

Block, Def

Instance Attribute Summary collapse

Attributes inherited from ASTnode

#parent, #usertype

Instance Method Summary collapse

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(params) ⇒ Parameters

Returns a new instance of Parameters.

Parameters:

  • params (Array) —

    ‘[:params, … ]`.



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# File 'lib/yadriggy/ast.rb', line 1227

def initialize(params)
  initialize_params(params)
end

Instance Attribute Details

#block_param ⇒ ASTnode|nil (readonly)

Returns the parameter preceded by an ampersand (‘&`).

Returns:

  • (ASTnode|nil) —

    the parameter preceded by an ampersand (‘&`).



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# File 'lib/yadriggy/ast.rb', line 1224

def block_param
  @block_param
end

#keywords ⇒ Array<Array<ASTnode>> (readonly)

Returns the keyword parameters. Each element is ‘[keyword, value]`.

Returns:

  • (Array<Array<ASTnode>>) —

    the keyword parameters. Each element is ‘[keyword, value]`.



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# File 'lib/yadriggy/ast.rb', line 1220

def keywords
  @keywords
end

#optionals ⇒ Array<Array<ASTnode>> (readonly)

Returns the list of parameters with default values. Each element is ‘[name, value]`.

Returns:

  • (Array<Array<ASTnode>>) —

    the list of parameters with default values. Each element is ‘[name, value]`.



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# File 'lib/yadriggy/ast.rb', line 1212

def optionals
  @optionals
end

#params ⇒ Array<ASTnode> (readonly)

Returns the parameter list.

Returns:

  • (Array<ASTnode>) —

    the parameter list.



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# File 'lib/yadriggy/ast.rb', line 1209

def params
  @params
end

#params_after_rest ⇒ Array<ASTnode> (readonly)

Returns the parameters following the parameter with asterisk (‘*`).

Returns:

  • (Array<ASTnode>) —

    the parameters following the parameter with asterisk (‘*`).



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# File 'lib/yadriggy/ast.rb', line 1217

def params_after_rest
  @params_after_rest
end

#rest_of_keywords ⇒ ASTnode|nil (readonly)

Returns the parameters preceded by two asterisks (‘**`).

Returns:

  • (ASTnode|nil) —

    the parameters preceded by two asterisks (‘**`).



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# File 'lib/yadriggy/ast.rb', line 1222

def rest_of_keywords
  @rest_of_keywords
end

#rest_of_params ⇒ ASTnode|nil (readonly)

Returns the parameter preceded by an asterisk (‘*`).

Returns:

  • (ASTnode|nil) —

    the parameter preceded by an asterisk (‘*`).



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# File 'lib/yadriggy/ast.rb', line 1214

def rest_of_params
  @rest_of_params
end

Instance Method Details

#initialize_params(params) ⇒ Object 



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# File 'lib/yadriggy/ast.rb', line 1231

def initialize_params(params)
  if params.nil?
    @params = []
    @optionals = []
    @rest_of_params = nil
    @params_after_rest = []
    @keywords = []
    @rest_of_keywords = nil
    @block_param = nil
  else
    if params[1].nil?
      @params = []
    else
      @params = to_nodes(params[1])
      add_children(@params)
    end

    if params[2].nil?
      @optionals = []
    else
      # [[name, value], ...]
      @optionals = params[2].map {|p| to_nodes(p) }
      @optionals.map {|p| add_children(p) }
    end

    if params[3].nil?
      @rest_of_params = nil
    else
      @rest_of_params = to_node(has_tag?(params[3], :rest_param)[1])
      add_child(@rest_of_params)
    end

    if params[4].nil?
      @params_after_rest = []
    else
      @params_after_rest = to_nodes(params[4])
      add_children(@params_after_rest)
    end

    if params[5].nil?
      @keywords = []
    else
      # [[keyword, value], ...]      value may be nil
      @keywords = params[5].map do |p|
        default_value = if p[1] then to_node(p[1]) else nil end
        [ to_node(p[0]), default_value ]
      end
      @keywords.map {|p| add_children(p) }
    end

    if params[6].nil?
      @rest_of_keywords = nil
    else
      rkeys = if params[6][0] == :@ident
                params[6]  # Ruby 2.4 or earlier
              else
                has_tag?(params[6], :kwrest_param)[1]
              end
      @rest_of_keywords = to_node(has_tag?(rkeys, :@ident))
    end

    if params[7].nil?
      @block_param = nil
    else
      @block_param = to_node(has_tag?(params[7], :blockarg)[1])
      add_child(@block_param)
    end
  end
end