\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// File Manager

File Manager

Path: /opt/chef.upgrade/embedded/lib/ruby/gems/2.3.0/gems/parser-2.4.0.0/lib/parser/

Viewing File: rewriter.rb

module Parser

  ##
  # {Parser::Rewriter} offers a basic API that makes it easy to rewrite
  # existing ASTs. It's built on top of {Parser::AST::Processor} and
  # {Parser::Source::Rewriter}.
  #
  # For example, assume you want to remove `do` tokens from a while statement.
  # You can do this as following:
  #
  #     require 'parser/current'
  #
  #     class RemoveDo < Parser::Rewriter
  #       def on_while(node)
  #         # Check if the statement starts with "do"
  #         if node.location.begin.is?('do')
  #           remove(node.location.begin)
  #         end
  #       end
  #     end
  #
  #     code = <<-EOF
  #     while true do
  #       puts 'hello'
  #     end
  #     EOF
  #
  #     buffer        = Parser::Source::Buffer.new('(example)')
  #     buffer.source = code
  #     parser        = Parser::CurrentRuby.new
  #     ast           = parser.parse(buffer)
  #     rewriter      = RemoveDo.new
  #
  #     # Rewrite the AST, returns a String with the new form.
  #     puts rewriter.rewrite(buffer, ast)
  #
  # This would result in the following Ruby code:
  #
  #     while true
  #       puts 'hello'
  #     end
  #
  # Keep in mind that {Parser::Rewriter} does not take care of indentation when
  # inserting/replacing code so you'll have to do this yourself.
  #
  # See also [a blog entry](http://whitequark.org/blog/2013/04/26/lets-play-with-ruby-code/)
  # describing rewriters in greater detail.
  #
  # @api public
  #
  class Rewriter < Parser::AST::Processor
    ##
    # Rewrites the AST/source buffer and returns a String containing the new
    # version.
    #
    # @param [Parser::Source::Buffer] source_buffer
    # @param [Parser::AST::Node] ast
    # @return [String]
    #
    def rewrite(source_buffer, ast)
      @source_rewriter = Source::Rewriter.new(source_buffer)

      process(ast)

      @source_rewriter.process
    end

    ##
    # Returns `true` if the specified node is an assignment node, returns false
    # otherwise.
    #
    # @param [Parser::AST::Node] node
    # @return [Boolean]
    #
    def assignment?(node)
      [:lvasgn, :ivasgn, :gvasgn, :cvasgn, :casgn].include?(node.type)
    end

    ##
    # Removes the source range.
    #
    # @param [Parser::Source::Range] range
    #
    def remove(range)
      @source_rewriter.remove(range)
    end

    ##
    # Inserts new code before the given source range.
    #
    # @param [Parser::Source::Range] range
    # @param [String] content
    #
    def insert_before(range, content)
      @source_rewriter.insert_before(range, content)
    end

    ##
    # Inserts new code after the given source range.
    #
    # @param [Parser::Source::Range] range
    # @param [String] content
    #
    def insert_after(range, content)
      @source_rewriter.insert_after(range, content)
    end

    ##
    # Replaces the code of the source range `range` with `content`.
    #
    # @param [Parser::Source::Range] range
    # @param [String] content
    #
    def replace(range, content)
      @source_rewriter.replace(range, content)
    end
  end

end