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Edit File : output-method.rb \| Size : 2.39 KB
# # output-method.rb - output methods used by irb # $Release Version: 0.9.6$ # $Revision: 38604 $ # by Keiju ISHITSUKA(keiju@ruby-lang.org) # # -- # # # require "e2mmap" module IRB # An abstract output class for IO in irb. This is mainly used internally by # IRB::Notifier. You can define your own output method to use with Irb.new, # or Context.new class OutputMethod extend Exception2MessageMapper def_exception :NotImplementedError, "Need to define `%s'" # Open this method to implement your own output method, raises a # NotImplementedError if you don't define #print in your own class. def print(opts) OutputMethod.Raise NotImplementedError, "print" end # Prints the given +opts+, with a newline delimiter. def printn(opts) print opts.join(" "), "\n" end # Extends IO#printf to format the given +opts+ for Kernel#sprintf using # #parse_printf_format def printf(format, opts) if /(%)%I/ =~ format format, opts = parse_printf_format(format, opts) end print sprintf(format, opts) end # Returns an array of the given +format+ and +opts+ to be used by # Kernel#sprintf, if there was a successful Regexp match in the given # +format+ from #printf # # % # <flag> [#0- +] # <minimum field width> (\\|\[1-9][0-9]\$\|[1-9][0-9]) # <precision>.(\\|\[1-9][0-9]\$\|[1-9][0-9]\|)? # #<length modifier>(hh\|h\|l\|ll\|L\|q\|j\|z\|t) # <conversion specifier>[diouxXeEfgGcsb%] def parse_printf_format(format, opts) return format, opts if $1.size % 2 == 1 end # Calls #print on each element in the given +objs+, followed by a newline # character. def puts(objs) for obj in objs print(obj) print "\n" end end # Prints the given +objs+ calling Object#inspect on each. # # See #puts for more detail. def pp(objs) puts(objs.collect{\|obj\| obj.inspect}) end # Prints the given +objs+ calling Object#inspect on each and appending the # given +prefix+. # # See #puts for more detail. def ppx(prefix, objs) puts(objs.collect{\|obj\| prefix+obj.inspect}) end end # A standard output printer class StdioOutputMethod<OutputMethod # Prints the given +opts+ to standard output, see IO#print for more # information. def print(opts) STDOUT.print(*opts) end end end Back

Edit File : output-method.rb | Size : 2.39 KB

#
#   output-method.rb - output methods used by irb
#   	$Release Version: 0.9.6$
#   	$Revision: 38604 $
#   	by Keiju ISHITSUKA(keiju@ruby-lang.org)
#
# --
#
#
#

require "e2mmap"

module IRB
  # An abstract output class for IO in irb. This is mainly used internally by
  # IRB::Notifier. You can define your own output method to use with Irb.new,
  # or Context.new
  class OutputMethod
    extend Exception2MessageMapper
    def_exception :NotImplementedError, "Need to define `%s'"

# Open this method to implement your own output method, raises a
    # NotImplementedError if you don't define #print in your own class.
    def print(*opts)
      OutputMethod.Raise NotImplementedError, "print"
    end

# Prints the given +opts+, with a newline delimiter.
    def printn(*opts)
      print opts.join(" "), "\n"
    end

# Extends IO#printf to format the given +opts+ for Kernel#sprintf using
    # #parse_printf_format
    def printf(format, *opts)
      if /(%*)%I/ =~ format
	format, opts = parse_printf_format(format, opts)
      end
      print sprintf(format, *opts)
    end

# Returns an array of the given +format+ and +opts+ to be used by
    # Kernel#sprintf, if there was a successful Regexp match in the given
    # +format+ from #printf
    #
    #     %
    #     <flag>  [#0- +]
    #     <minimum field width> (\*|\*[1-9][0-9]*\$|[1-9][0-9]*)
    #     <precision>.(\*|\*[1-9][0-9]*\$|[1-9][0-9]*|)?
    #     #<length modifier>(hh|h|l|ll|L|q|j|z|t)
    #     <conversion specifier>[diouxXeEfgGcsb%]
    def parse_printf_format(format, opts)
      return format, opts if $1.size % 2 == 1
    end

# Calls #print on each element in the given +objs+, followed by a newline
    # character.
    def puts(*objs)
      for obj in objs
	print(*obj)
	print "\n"
      end
    end

# Prints the given +objs+ calling Object#inspect on each.
    #
    # See #puts for more detail.
    def pp(*objs)
      puts(*objs.collect{|obj| obj.inspect})
    end

# Prints the given +objs+ calling Object#inspect on each and appending the
    # given +prefix+.
    #
    # See #puts for more detail.
    def ppx(prefix, *objs)
      puts(*objs.collect{|obj| prefix+obj.inspect})
    end

end

# A standard output printer
  class StdioOutputMethod<OutputMethod
    # Prints the given +opts+ to standard output, see IO#print for more
    # information.
    def print(*opts)
      STDOUT.print(*opts)
    end
  end
end

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