Module: Pry::Hackage

Defined in:
lib/pry/hack.rb

Overview

The main module containing the hack code

Defined Under Namespace

Classes: Hack, ModOpHack

Constant Summary collapse

VERSION = 
0.1
REGEX_REGEX =

Regular expressions kept constant for optimization and intended for use to match patterns that may be used by a hack in the future.

[%r/\A\/(.+?)\/(.+?)*\Z/, %r/%r(.)([^\1\\]|\\.)*\1/]
SYMBOL_REGEX = 
%r/\A\:(.+?)\Z/
KEYWORDS = 
%w[BEGIN END alias and begin break case class def defined? do else elsif end ensure for
if in module next not or redo rescue retry return super then when while yield]

Class Method Summary collapse

Class Method Details

.hack_line(str) ⇒ Object 



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# File 'lib/pry/hack.rb', line 160

def self.hack_line(str)
 # A dirty syntax hack used to enable and disable pry-hack when a hack goes
 # wrong and you are unable to fix it because of a side effect. The syntax is as follows
 # -*- pry-hack: disable -*-
 # or to enable
 # -*- pry-hack: enable -*-
 if str =~ /#\s*-\*-\s*pry-hack:\s*(disable|enable)\s*-\*-\s*/
   self.config.hack.enabled = ($1 == "enable") ? true : false
 end
 return str unless ::Pry.config.hack.enabled      
 stack  = []
 tstack = []
 state  = nil

 lexer = RubyLexer.new("(pry)", str)
 tstack = lexer.to_set.to_a[1..-2].select {|x| !(x.is_a? RubyLexer::FileAndLineToken) }
 tstack.map!(&:to_s)
   while c = tstack.shift
     if state.nil?
       state= case c
              when '.'
                # self.config.hack.s.meth
                :meth
              when '%'
                # self.config.hack.s.modop
                :modop
              when Hackage::SYMBOL_REGEX
                # self.config.hack.s.symbol_prefix
                :symbol_prefix
              when *Hackage::REGEX_REGEX
                # self.config.hack.s.regex
                :regex
              end
      stack.push c
      next 
    else
      if state == :modop && tstack[0] =~ /[^A-Za-z0-9#]/
         char = Regexp.escape(tstack[0])
         char_to_match = Regexp.escape(ModOpHack::PAIR_MATCHES[tstack[0]] || char) 
         c += (tstack.shift + " ") until c =~ /^.#{char}.*#{char_to_match}/ 
      end
      hacks = (self.config.hack.s.send(state).values.sort_by {|x| x.score(c) })
      if hacks.nil?
       stack.push c
       next
      end 
      hacks.compact!
      hacks.reject! {|x| x.score(c).nil? }
      if hacks.any? && stack.last == '%' then stack.pop end   # Do this so that you can make sure not to have a double modulo occurance
      c = (hacks.any?) ? hacks.last.run(binding) : c
      state = nil
      stack.push c
    end
  end  
  return stack.join
end