ruby-dev

けいじゅ＠日本ラショナルソフトウェアです.

In [ruby-dev :00297 ] the message: "[ruby-dev:297] Re: illegal here
document ", on Aug/28 12:44(JST) matz@netlab.co.jp (Yukihiro
Matsumoto) writes:

>まつもと ゆきひろです

>最初はそう思ったんですけど，やっぱりhere documentのはじまり
>は << でないとイメージ湧かないと思うんです．ある言語ではたま
>たま << であるというわけではなく，shもcshもperlもhere document
>を持つ言語がすべて << で始まっているのに，rubyだけ違えるのに
>は抵抗があるんですけど．

うーん...

>perlでも << に二通りの意味を与えているわけでそれほど無理があ
>るとも思えませんし．

でも,

>  * << の後ろが' " ` またはアルファベットのいずれか
>
>である時に here document であるとしました．つまり，今までの
>もので << のうしろに空白を置く必要が出て来るものがあります．
>他に良い判別法があれば教えて下さい．

いままで, こういう制限(演算子の直後の文字で動作が変わる)てrubyにはなかっ
たですよねえ...

%qぐらいかな... でも, %q/ という風に記号にはさまれたのであまり違和感が
なかったですが... <<に関してはどうかなぁ...

foo <<END
...
END

それに, "があると

foo << "END END"
...
"END END"

としたくなりそう.

やはり, 間違いの元になりやすそうな気がするんですけど...

__
................................石塚 圭樹＠日本ラショナルソフトェア...
----------------------------------->> e-mail: keiju@bc.mbn.or.jp <<---

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[#272] [Bug] default argument value — shugo@... (前田修吾 / maeda shugo)

[#291] illegal here document — shugo@... (前田修吾 / maeda shugo)