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#
# output-method.rb - output methods used by irb
# $Release Version: 0.9.6$
# $Revision: 47120 $
# 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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