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+ < h1 itemprop ="name "> < span class ="token "> 基本文字集合に@、$、`を追加[P2558R2]</ span > < span class ="cpp cpp26 " title ="C++26で追加 "> (C++26)</ span > </ h1 >
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+ < p > このページはC++26に採用される見込みの言語機能の変更を解説しています。
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+ のちのC++規格でさらに変更される場合があるため< a href ="#relative-page "> 関連項目</ a > を参照してください。
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+ </ p >
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+ < h2 > 概要</ h2 >
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+ < p > 基本文字集合に
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+ $ (U+0024)
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+ @ (U+0040)
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+ ` (U+0060)
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+ の3文字を加える。< br />
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+ CではC23で追加され、それに合わせるようにC++でも同様の変更を提案している。< br />
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+ これにより、これらの文字を構文として使用でき、コードの可読性や他言語絵の移植性が向上する。</ p >
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+ < p > < div class ="codehilite "> < pre > < span > </ span > < code > < span class ="cp "> #include</ span > < span class ="cpf "> <stdio.h></ span > < span class ="cp "> </ span >
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+ < span class ="cp "> #define STR(x) #x</ span >
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+ < span class ="n "> printf</ span > < span class ="p "> (</ span > < span class ="s "> "%s"</ span > < span class ="p "> ,</ span > < span class ="n "> STR</ span > < span class ="p "> (</ span > < span class ="err "> \</ span > < span class ="n "> u0060</ span > < span class ="p "> ));</ span > < span class ="c1 "> // U+0060 は ` GRAVE ACCENT</ span >
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+ < span class ="p "> }</ span >
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+ </ code > </ pre > </ div >
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+ </ p >
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+ < h2 > 参照</ h2 >
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+ < ul >
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+ < li > < a href ="https://open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2558r2.html " target ="_blank "> P2558R2 Add @, $, and ` to the basic character set</ a > </ li >
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