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require 'benchmark'
class BlankSlate
instance_methods.each { |meth| undef_method(meth) unless meth.to_s =~ /^(__|object_id)/ }
end
class NormalMessage < BlankSlate
def initialize(*phrases)
@message = ""; _phrase(*phrases)
end
def to_s; @message; end
def method_missing(meth, *phrases, &blk) push(meth.to_s.gsub('_', ' ')); _phrase(*phrases); end
def comma(str, *phrases) raise Exception, "Whoops - comma"; end
def but(*phrases); comma("but", *phrases); end
def not(*phrases); comma("not", *phrases); end
def push(str) raise Exception, "Whoops - push"; end
private
def _concat(str) (@message << str).strip!; self; end
def _phrase(*phrases) phrases.each { |phrase| push(phrase.inspect) }; self; end
end # Message
# +
class PlusMessage < NormalMessage
def comma(str, *phrases) _concat(", " + str); _phrase(*phrases); end
def push(str) _concat(" " + str); end
end # Message
# <<
class AppendMessage < NormalMessage
def comma(str, *phrases) _concat(", " << str); _phrase(*phrases); end
def push(str) _concat(" " << str); end
end # Message
# Experimental
class ExperimentalMessage < BlankSlate
def initialize(*phrases)
@chunks = []; _inspect(phrases)
end
def to_s; @chunks.join; end
def method_missing(meth, *phrases, &blk) push(meth.to_s.gsub('_', ' ')); _inspect(phrases); end
def comma(str, *phrases) _concat([", ", str]); _inspect(phrases); end
def but(*phrases); comma("but", *phrases); end
def not(*phrases); comma("not", *phrases); end
def push(str) _concat([" ", str]); end
private
def _concat(chunks) @chunks.concat(chunks); self; end
def _inspect(phrases) phrases.each { |phrase| push(phrase.inspect) }; self; end
end # Message
#
# Benchmarking
Benchmark.bmbm do |x|
def message_test(klass)
STDOUT.puts(klass.new.comma("yes").push("no").foo.bar("baz").to_s)
10_000.times do
klass.new.comma("yes").push("no").foo.bar("baz").to_s
end
end
x.report("+ based message") do
message_test(PlusMessage)
end
x.report("<< based message") do
message_test(AppendMessage)
end
x.report("experimental message") do
message_test(ExperimentalMessage)
end
end
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