Class: IRuby::PryBackend

Inherits:
Object
  • Object
show all
Includes:
History
Defined in:
lib/iruby/backend.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ PryBackend

Returns a new instance of PryBackend.



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# File 'lib/iruby/backend.rb', line 87

def initialize
  require 'pry'
  Pry.memory_size = 3
  Pry.pager = false # Don't use the pager
  Pry.print = proc {|output, value|} # No result printing
  Pry.exception_handler = proc {|output, exception, _| }
  @eval_path = Pry.eval_path
  reset
end

Instance Attribute Details

#eval_path ⇒ Object (readonly)

Returns the value of attribute eval_path.



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# File 'lib/iruby/backend.rb', line 84

def eval_path
  @eval_path
end

Instance Method Details

#complete(code) ⇒ Object 



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# File 'lib/iruby/backend.rb', line 128

def complete(code)
  @pry.complete(code)
end

#eval(code, store_history) ⇒ Object 



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# File 'lib/iruby/backend.rb', line 101

def eval(code, store_history)
  Pry.current_line = 1
  @pry.last_result = nil
  unless @pry.eval(code)
    reset
    raise SystemExit
  end

  # Pry::Code.complete_expression? return false
  if !@pry.eval_string.empty?
    syntax_error = @pry.eval_string
    @pry.reset_eval_string
    @pry.evaluate_ruby(syntax_error)

  # Pry::Code.complete_expression? raise SyntaxError
  # evaluate again for current line number
  elsif @pry.last_result_is_exception? &&
          @pry.last_exception.is_a?(SyntaxError) &&
          @pry.last_exception.is_a?(Pry::UserError)
     @pry.evaluate_ruby(code)
  end

  raise @pry.last_exception if @pry.last_result_is_exception?
  @pry.push_initial_binding unless @pry.current_binding # ensure that we have a binding
  @pry.last_result
end

#eval_binding ⇒ Object 



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# File 'lib/iruby/backend.rb', line 97

def eval_binding
  TOPLEVEL_BINDING
end

#reset ⇒ Object 



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# File 'lib/iruby/backend.rb', line 132

def reset
  @pry = Pry.new(output: $stdout, target: eval_binding)
end