ruby-dev

なかだです。

At Sat, 22 Sep 2007 15:58:57 +0900,
eklerni wrote in [ruby-dev:31815]:
> encoding pragma無指定時の挙動ですが、
> 文字列の式展開がコマンドラインオプションによっては失敗します。

> C:\ruby-1.9\bin>ruby -Ks -v -e 'p "at#{}"'
> ruby 1.9.0 (2007-09-21 patchlevel 0) [i386-mswin32_80]
> -e:1:in `<main>': character encodings differ (ArgumentError)

1. nil.to_sはencodingに関係なく、US-ASCIIの""を返す
2. 文字列リテラルは、内容に関係なく-Kで指定されたencodingに従う
3. 結合の際にASCII-compatibleかどうかは考慮されない

詳細は[ruby-dev:31715]からのスレッドをみてください。

上の例に関しては、nil.to_sを直すだけでも通るようになると思います
が、たとえばutf-8のライブラリを使うときには必ず-Kuを付けなければ
ならないというのも、不便だと思います。

結局、自動変換をサポートするかという話になるのかもしれませんが、
外部からもらったStringは常にencodeしてから使え、というのもかなり
面倒です。

-- 
--- 僕の前にBugはない。
--- 僕の後ろにBugはできる。
    中田 伸悦

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[#31690] m17n questions — SASADA Koichi <ko1@...>

[#31692] cannot run test-all — "U.Nakamura" <usa@...>

[#31697] Re: [ruby-list:43970] 次の1.8.6 — Tadayoshi Funaba <tadf@...>

[#31698] Re: [ruby-cvs:20568] Ruby:r13331 (trunk): * eval_jump.ci (rb_f_catch): generate new tag object if no argument is — "U.Nakamura" <usa@...>

[#31702] [ANN] Rubyロゴコンテスト — Shugo Maeda <shugo@...>

[#31709] [BUG] non-initialized struct — Tanaka Akira <akr@...>

[#31710] optimize range space — Tanaka Akira <akr@...>

[#31715] string literal encoding — Nobuyoshi Nakada <nobu@...>

[#31729] packed st_table — Nobuyoshi Nakada <nobu@...>

[#31731] ordered/unordered st_table — Nobuyoshi Nakada <nobu@...>

[#31734] [m17n] String#chop & String#succ — Nobuyoshi Nakada <nobu@...>

[#31736] integer overflow in Array#[] — sheepman <sheepman@...>

[#31737] integer overflow in Array#[]= — sheepman <sheepman@...>

[#31738] integer overflow in Array#fill — sheepman <sheepman@...>

[#31739] integer overflow in String#[]= — sheepman <sheepman@...>

[#31740] FileTest.identical? with IO — sheepman <sheepman@...>

[#31743] deprecating RUBY_VERSION_CODE — Nobuyoshi Nakada <nobu@...>

[#31744] [m17n] String#encode — Nobuyoshi Nakada <nobu@...>

[#31748] typo at Array#cycle documentation — Yugui <yugui@...>

[#31754] Re: [ruby-cvs:20585] Ruby:r13348 (trunk): * array.c (rb_ary_cycle): typo in rdoc. a patch from Yugui — "U.Nakamura" <usa@...>

[#31759] SEGV by modifying __members__ — Tanaka Akira <akr@...>

[#31763] integer overflow in Range#step — sheepman <sheepman@...>

[#31768] shellescape — "Akinori MUSHA" <knu@...>

[#31774] RSTRING(value)->ptr == NULL ? — Tietew <tietew+ruby-dev@...>

[#31775] 1.9 on OpenBSD — SASADA Koichi <ko1@...>

[#31780] "string"[/str/]=:not_string dumps core — Nobuyoshi Nakada <nobu@...>

[#31781] `scan': character encodings differ (ArgumentError) — Kouhei Sutou <kou@...>

[#31786] rstripがstripしすぎる — Kouhei Sutou <kou@...>

[#31787] 文字列のinspect — eklerni <eklerni@...>

[#31798] generator from Enumerable#map — "Yusuke ENDOH" <mame@...>

[#31799] weakref.rbにデバッグ用print — "madoka yamamoto" <yamamotomadoka@...>

[#31802] hash value of { n => n } — "Yusuke ENDOH" <mame@...>

[#31804] TYPE(cl) in rb_obj_is_kind_of — Tanaka Akira <akr@...>

[#31806] rb_str_substr is much slower than rb_str_subpat — Nobuyoshi Nakada <nobu@...>

[#31810] rb_obj_is_kind_of — Tanaka Akira <akr@...>

[#31815] 文字列の式展開 — eklerni <eklerni@...>

[#31816] SEGV by removing undefined method — Tanaka Akira <akr@...>

[#31817] removing undefined method on 1.8 — Tanaka Akira <akr@...>

[#31818] SEGV by attr — Tanaka Akira <akr@...>

[#31819] rb_clear_cache_by_class — Tanaka Akira <akr@...>

[#31820] valgrind set_trace_func — Tanaka Akira <akr@...>

[#31821] unsubscribe — "Angadpreet Chadha" <angadsc@...>

[#31831] trunk で現状セルフビルドができません — "きむらこういち" <hogemuta@...>

[#31835] Kernel#` is blocked with Ruby/GLib2 on Intel Mac — Kouhei Sutou <kou@...>

[#31840] valgrind fiber — Tanaka Akira <akr@...>

[#31842] 拡張ライブラリ内での SIGVTALRM — とみたまさひろ <tommy@...>

[#31848] huge `if' dumps core — "Yusuke ENDOH" <mame@...>

[#31849] Exception `ArgumentError' at (null):0 - NULL pointer given — Tanaka Akira <akr@...>

[#31850] meta programming might dump core — "Yusuke ENDOH" <mame@...>

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[#31853] optimize T_OBJECT space — Tanaka Akira <akr@...>

[#31854] Symbol.all_symbols — eklerni <eklerni@...>

[#31866] reading a pipe by multiple threads — Tanaka Akira <akr@...>

[#31870] marshal_dumpで不正なデータが書き出される — kumaryu <kumaryu@...>

[#31871] Process::WNOHANG — Tanaka Akira <akr@...>

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[#31896] URI::LDAPS — Kouhei Sutou <kou@...>

[#31898] memory consumption on ext/dl build — Tanaka Akira <akr@...>

[#31900] platform-independent per-process initialization — Nobuyoshi Nakada <nobu@...>

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[#31914] m17nの全貌に関する何か — Masayoshi Takahashi <maki@...>

[ruby-dev:31822] Re: 文字列の式展開

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[#31759] SEGV by modifying members — Tanaka Akira <akr@...>