Module: RplLang::Words::Branch

Includes:
Types
Included in:
Rpl
Defined in:
lib/rpl/words/branch.rb

Instance Method Summary collapse

Methods included from Types

new_object

Instance Method Details

#populate_dictionary ⇒ Object 



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# File 'lib/rpl/words/branch.rb', line 8

def populate_dictionary
  super

  category = 'Branch'

  @dictionary.add_word( ['ift'],
                        category,
                        '( t pt -- … ) eval pt or not based on the value of boolean t',
                        Types.new_object( RplProgram, '« « nop » ifte »' ) )

  @dictionary.add_word( ['ifte'],
                        category,
                        '( t pt pf -- … ) eval pt or pf based on the value of boolean t',
                        proc do
                          args = stack_extract( [:any, :any, [RplBoolean]] )

                          run( args[ args[2].value ? 1 : 0 ].value )
                        end )

  @dictionary.add_word( ['times'],
                        category,
                        '( p n -- … ) eval p n times while pushing counter on stack before',
                        proc do
                          args = stack_extract( [[RplNumeric], :any] )

                          args[0].value.to_i.times do |counter|
                            @stack << Types.new_object( RplNumeric, counter )

                            run( args[1].value )
                          end
                        end )

  @dictionary.add_word( ['loop'],
                        category,
                        '( p n1 n2 -- … ) eval p looping from n1 to n2 while pushing counter on stack before',
                        proc do
                          args = stack_extract( [[RplNumeric], [RplNumeric], :any] )

                          ((args[1].value.to_i)..(args[0].value.to_i)).each do |counter|
                            @stack << Types.new_object( RplNumeric, counter )

                            run( args[2].value )
                          end
                        end )
end