PartialFunction 直接書けるところに、match式を書く人がいる件

Scala quiz #47: What is wrong with the following fragment?{ _ match {

2013-04-10 03:56:41 via Tweetbot for Mac

@leifwickland You can always use a partial function directly, rather than cluttering things with the match. Equivalent, and more concise.

2013-04-10 07:36:50 via Tweetbot for Mac to @leifwickland

まぁ細かいどうでもいい事といえばどうでもいい事なんですが、明らかにPartialFunctionを直で書いたほうが短く書けるので、そうしたほうがいいと思います。これ見ちゃうと、「あぁまだScala初心者なのかなぁ」とか思ってしまいます。個人的には結構気になります。例えば以下のような・・・

$ grep "_ match" .
./framework/src/play/src/main/scala/play/core/system/ApplicationProvider.scala:235:              lazy val findSideBar: (Option[Path] => Option[Path]) = _ match {
./framework/src/sbt-plugin/src/main/scala/jscompile/JavascriptCompiler.scala:38:      simpleCompilerOptions.foreach(_ match {
./framework/src/sbt-plugin/src/main/scala/PlayReloader.scala:157:        val link:(String => (String, String)) = _ match {
./samples/scala/helloworld/test/FormSpec.scala:81:      form.value must beSome.which { _ match {

https://github.com/playframework/Play20/blob/2.1.1/framework/src/play/src/main/scala/play/core/system/ApplicationProvider.scala#L235
https://github.com/playframework/Play20/blob/2.1.1/framework/src/sbt-plugin/src/main/scala/jscompile/JavascriptCompiler.scala#L38
https://github.com/playframework/Play20/blob/2.1.1/framework/src/sbt-plugin/src/main/scala/PlayReloader.scala#L157
https://github.com/playframework/Play20/blob/2.1.1/samples/scala/helloworld/test/FormSpec.scala#L81

ところで、47って、そんなにクイズ出してたんですか・・・？