Class: RubyNext::Language::Rewriters::EndlessRange

Inherits:
Base
  • Object
show all
Defined in:
lib/ruby-next/language/rewriters/2.6/endless_range.rb

Constant Summary collapse

NAME = 
"endless-range"
SYNTAX_PROBE = 
"[0, 1][1..]"
MIN_SUPPORTED_VERSION = 
Gem::Version.new("2.6.0")

Instance Attribute Summary

Attributes inherited from Base

#locals

Instance Method Summary collapse

Methods inherited from Base

ast?, #initialize, #s

Methods inherited from Abstract

ast?, #initialize, text?, unsupported_syntax?, unsupported_version?

Constructor Details

This class inherits a constructor from RubyNext::Language::Rewriters::Base

Instance Method Details

#on_erange(node) ⇒ Object Also known as: on_irange 



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# File 'lib/ruby-next/language/rewriters/2.6/endless_range.rb', line 25

def on_erange(node)
  return unless node.children.last.nil?

  context.track! self

  new_end =
    if index_arg?(node)
      s(:int, -1)
    else
      s(:const,
        s(:const,
          s(:cbase), :Float),
        :INFINITY)
    end

  replace(node.loc.expression, "#{node.children.first.loc.expression.source}..#{unparse(new_end)}")

  node.updated(
    :irange,
    [
      node.children.first,
      new_end
    ]
  )
end

#on_index(node) ⇒ Object 



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# File 'lib/ruby-next/language/rewriters/2.6/endless_range.rb', line 11

def on_index(node)
  @current_index = node
  new_index = process(node.children.last)
  return unless new_index != node.children.last

  node.updated(
    nil,
    [
      node.children.first,
      new_index
    ]
  )
end