class IRB::FileInputMethod

Use a File for IO with irb, see InputMethod

def close 

def close
  @io.close
end

def encoding

The external encoding for standard input. 
def encoding
  @external_encoding
end

def eof?

See IO#eof? for more information.

there is no more data to read.
Whether the end of this input method has been reached, returns +true+ if 
def eof?
  @io.closed? || @io.eof?
end

def gets

See IO#gets for more information.

Reads the next line from this input method. 
def gets
  print @prompt
  @io.gets
end

def initialize(file)

Creates a new input method object 
def initialize(file)
  @io = file.is_a?(IO) ? file : File.open(file)
  @external_encoding = @io.external_encoding
end

def inspect

For debug message 
def inspect
  'FileInputMethod'
end

def open(file, &block) 

def open(file, &block)
  begin
    io = new(file)
    block.call(io)
  ensure
    io&.close
  end
end