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|
require "cabin/namespace"
module Cabin
module Inspectable
# Provide a saner inspect method that's easier to configure.
#
# By default, will inspect all instance variables. You can tune
# this by setting @inspectables to an array of ivar symbols, like:
# [ :@hello, :@world ]
#
# class Foo
# include Cabin::Inspectable
#
# def initialize
# @inspectables = [:@foo, :@bar]
# @foo = 123
# @bar = "hello"
# @baz = "ok"
# end
# end
#
# foo = Foo.new
# foo.inspect == '<Foo(1) @foo=123 @bar="hello" >'
def inspect
if instance_variable_defined?(:@inspectables)
ivars = @inspectables
else
ivars = instance_variables
end
str = "<#{self.class.name}(@#{self.object_id}) "
ivars.each do |ivar|
str << "#{ivar}=#{instance_variable_get(ivar).inspect} "
end
str << ">"
return str
end
end
def self.__Inspectable(*ivars)
mod = Module.new
mod.instance_eval do
define_method(:inspect) do
ivars = instance_variables if ivars.empty?
str = "<#{self.class.name}(@#{self.object_id}) "
ivars.each do |ivar|
str << "#{ivar}=#{instance_variable_get(ivar).inspect} "
end
str << ">"
return str
end
end
return mod
end # def Cabin.Inspectable
end # module Cabin
|
