lib/irb/workspace.rb

DEFINITIONS

   1  #
   2  #   irb/workspace-binding.rb - 
   3  #       $Release Version: 0.9$
   4  #       $Revision: 1.3 $
   5  #       $Date: 2002/07/09 11:17:16 $
   6  #       by Keiju ISHITSUKA(keiju@ishitsuka.com)
   7  #
   8  # --
   9  #
  10  #   
  11  #
  12  module IRB
  13    class WorkSpace
  14      # create new workspace. set self to main if specified, otherwise
  15      # inherit main from TOPLEVEL_BINDING.
  16      def initialize(*main)
  17        if main[0].kind_of?(Binding)
  18          @binding = main.shift
  19        elsif IRB.conf[:SINGLE_IRB]
  20          @binding = TOPLEVEL_BINDING
  21        else
  22          case IRB.conf[:CONTEXT_MODE]
  23          when 0  # binding in proc on TOPLEVEL_BINDING
  24            @binding = eval("proc{binding}.call",
  25                        TOPLEVEL_BINDING, 
  26                        __FILE__,
  27                        __LINE__)
  28          when 1  # binding in loaded file
  29            require "tempfile"
  30            f = Tempfile.open("irb-binding")
  31            f.print <<EOF
  32            $binding = binding
  33  EOF
  34            f.close
  35            load f.path
  36            @binding = $binding
  37  
  38          when 2  # binding in loaded file(thread use)
  39            unless defined? BINDING_QUEUE
  40              require "thread"
  41              
  42              IRB.const_set("BINDING_QUEUE", SizedQueue.new(1))
  43              Thread.abort_on_exception = true
  44              Thread.start do
  45                eval "require \"irb/ws-for-case-2\"", TOPLEVEL_BINDING, __FILE__, __LINE__
  46              end
  47              Thread.pass
  48            end
  49            @binding = BINDING_QUEUE.pop
  50  
  51          when 3  # binging in function on TOPLEVEL_BINDING(default)
  52            @binding = eval("def irb_binding; binding; end; irb_binding",
  53                        TOPLEVEL_BINDING, 
  54                        __FILE__,
  55                        __LINE__ - 3)
  56          end
  57        end
  58        if main.empty?
  59          @main = eval "self", @binding
  60        else
  61          @main = main[0]
  62          IRB.conf[:__MAIN__] = @main
  63          case @main
  64          when Module
  65            @binding = eval("IRB.conf[:__MAIN__].module_eval('binding', __FILE__, __LINE__)", @binding, __FILE__, __LINE__)
  66          else
  67            begin 
  68              @binding = eval("IRB.conf[:__MAIN__].instance_eval('binding', __FILE__, __LINE__)", @binding, __FILE__, __LINE__)
  69            rescue TypeError
  70              IRB.fail CanNotChangeBinding, @main.inspect
  71            end
  72          end
  73        end
  74        eval("_=nil", @binding)
  75      end
  76  
  77      attr_reader :binding
  78      attr_reader :main
  79  
  80      def evaluate(context, statements, file = __FILE__, line = __LINE__)
  81        eval(statements, @binding, file, line)
  82      end
  83    
  84      # error message manupilator
  85      def filter_backtrace(bt)
  86        case IRB.conf[:CONTEXT_MODE]
  87        when 0
  88          return nil if bt =~ /\(irb_local_binding\)/
  89        when 1
  90          if(bt =~ %r!/tmp/irb-binding! or
  91             bt =~ %r!irb/.*\.rb! or
  92             bt =~ /irb\.rb/)
  93            return nil
  94          end
  95        when 2
  96          return nil if bt =~ /irb\/.*\.rb/
  97        when 3
  98          return nil if bt =~ /irb\/.*\.rb/
  99          bt.sub!(/:\s*in `irb_binding'/){""} 
 100        end
 101        bt
 102      end
 103  
 104      def IRB.delete_caller
 105      end
 106    end
 107  end