C++は難しい

一連のトークン分割、つらつら眺めてみるに...こら難しいわ(笑

ビギナやヒヨコには呪文にしか見えません

typedef typename string_type::size_type size_type;
typedef std::pair<size_type,size_type> range_type;
explicit tokenizer(const string_type& delim) : dlm_(delim) {}
string_type token() const
tokenizer& operator++()
tokenizer operator++(int)
mutable int value; なんてのもあるねー

僕、今まで「C++? 難しくないよ。メンドくさいだけ」って言うてきたけど
知ってるから言えるセリフなんだなー、と。
たしかにこのとっつきの悪さは他言語の追随を許さんなー ^^;;;;

投稿日時 : 2007年9月13日 10:16

コメントを追加

# re: C++は難しい 2007/09/13 10:30 のん＠琉希唖

C言語はやったことないのであれなんですが・・・
なんとなくわかるものの呪文に見えますｗ
やっぱVBが好きって感じです（おいｗ

# re: C++は難しい 2007/09/13 10:46 επιστημη

ですよねー。僕にはVBが呪文に見えるし。
だいたいあのDimってなによDimって。
Dimensionの略? 次元がどぉした?
Shared? 分けっコしたの? だれと?

C#とほぼ一対一に対応付くからまだマシですけども。

# re: C++は難しい 2007/09/13 12:16 シャノン

BASIC の頃は変数宣言が必須でなく、しかし配列の場合は事前に要素数を明示する必要があったために、Dimension が使われたのですが、そのうちに配列以外にも使われるようになってしまったと。

std:: とか explicit とか &（参照）とかは C# にも対応概念があるのでわかりやすいかなーと。

コンストラクタ初期化子はむしろ C# のような「readonly 変数はコンストラクタ本体中でも初期化が出来る」っていう方が好き。構文としては C# にも this とか base 呼び出しがあるのでハードルは低め。

const メンバ関数と mutable は C# にはないけど、俺は好き。まぁ mutable は多用すべきじゃないけど。
readonly int[] a = new int[3];
a[0] = 1;
こんなコードは正気じゃない。

typename はともかくとして、string_type::size_type の方が魔境。ダックタイピングなんて知りませんｗｗ

後置++ はこの際無かったことに。

# re: C++は難しい 2007/09/13 12:35 アキラ

C++を始める人は『Effective C++』を読んでからプログラム組みましょう。ということですねｗ

# re: C++は難しい 2007/09/13 13:24 επιστημη

ははー、そんなナレソメがあったですか。
配列でもないのになぁにがDimよーて思てたある。

Modula-2みたく:
TYPE index = [0..4];
VAR i : CARDIAL;
VAP a : ARRAY index OF POINTER TO INTEGER;
なんてのが直観的なんだけどなー

# re: C++は難しい 2007/09/13 14:23 ひよっこStreetw☆

わからない人の気持ち、わかっていただいて、ちょっとうれしかったです。
昨日は「キミは本当は誰？」ってtypedefの元をＦ１２ボタン押して探求してましたｗ

>Modula-2みたく
また新たな呪文を唱え始められたって思いましたｗ
これからもいろんな呪文、聞かせてください。

# re: C++は難しい 2007/09/13 16:05 επιστημη

> readonly int[] a = new int[3];
> a[0] = 1;

配列はreadonlyだけどそのナカミについてはreadonlyの効果が及ばぬわけだ。

んじゃ、C++でいうところの const char* や
char const * const は如何に表現すんでしょか?
教えて >　知ってるひと

# re: C++は難しい 2007/09/14 16:22 シャノン

知ってる人のコメントを待ってたんだがつかないようなので。
「できません」で。

# re: C++は難しい 2007/09/14 16:27 シャノン

ReadOnlyCollectionBase とか使えば、実行時チェック（Add メソッド呼んだら例外が飛ぶ）っていう形ではできますけどね。

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