【C++】属性構文の属性名にはキーワードが使える

From d30dfc89bf1b673b2fdc0638766b930adaec228c Mon Sep 17 00:00:00 2001 From: nsfisis Date: Sat, 29 Mar 2025 00:47:55 +0900 Subject: feat(blog/nuldoc): migrate syntax highlighter from highlight.js to shiki.js --- .../index.html | 49 ++++++++++++---------- 1 file changed, 26 insertions(+), 23 deletions(-) (limited to 'vhosts/blog/public/posts/2021-10-02/cpp-you-can-use-keywords-in-attributes') diff --git a/vhosts/blog/public/posts/2021-10-02/cpp-you-can-use-keywords-in-attributes/index.html b/vhosts/blog/public/posts/2021-10-02/cpp-you-can-use-keywords-in-attributes/index.html index b6baad39..d99fc02c 100644 --- a/vhosts/blog/public/posts/2021-10-02/cpp-you-can-use-keywords-in-attributes/index.html +++ b/vhosts/blog/public/posts/2021-10-02/cpp-you-can-use-keywords-in-attributes/index.html @@ -14,8 +14,7 @@ 【C++】属性構文の属性名にはキーワードが使える｜REPL: Rest-Eat-Program Loop - - +

@@ -74,25 +73,27 @@ タイトル落ち。まずはこのコードを見て欲しい。

#include <iostream>
-
-[[alignas]] [[alignof]] [[and]] [[and_eq]] [[asm]] [[auto]] [[bitand]]
-[[bitor]] [[bool]] [[break]] [[case]] [[catch]] [[char]] [[char16_t]]
-[[char32_t]] [[class]] [[compl]] [[const]] [[const_cast]] [[constexpr]]
-[[continue]] [[decltype]] [[default]] [[delete]] [[do]] [[double]]
-[[dynamic_cast]] [[else]] [[enum]] [[explicit]] [[export]] [[extern]] [[false]]
-[[final]] [[float]] [[for]] [[friend]] [[goto]] [[if]] [[inline]] [[int]]
-[[long]] [[mutable]] [[namespace]] [[new]] [[noexcept]] [[not]] [[not_eq]]
-[[nullptr]] [[operator]] [[or]] [[or_eq]] [[override]] [[private]]
-[[protected]] [[public]] [[register]] [[reinterpret_cast]] [[return]] [[short]]
-[[signed]] [[sizeof]] [[static]] [[static_assert]] [[static_cast]] [[struct]]
-[[switch]] [[template]] [[this]] [[thread_local]] [[throw]] [[true]] [[try]]
-[[typedef]] [[typeid]] [[typename]] [[union]] [[unsigned]]
-[[virtual]] [[void]] [[volatile]] [[wchar_t]] [[while]] [[xor]] [[xor_eq]]
-// [[using]]
-int main() {
-    std::cout << "Hello, World!" << std::endl;
-}

#include <iostream>
+
+[[alignas]] [[alignof]] [[and]] [[and_eq]] [[asm]] [[auto]] [[bitand]]
+[[bitor]] [[bool]] [[break]] [[case]] [[catch]] [[char]] [[char16_t]]
+[[char32_t]] [[class]] [[compl]] [[const]] [[const_cast]] [[constexpr]]
+[[continue]] [[decltype]] [[default]] [[delete]] [[do]] [[double]]
+[[dynamic_cast]] [[else]] [[enum]] [[explicit]] [[export]] [[extern]] [[false]]
+[[final]] [[float]] [[for]] [[friend]] [[goto]] [[if]] [[inline]] [[int]]
+[[long]] [[mutable]] [[namespace]] [[new]] [[noexcept]] [[not]] [[not_eq]]
+[[nullptr]] [[operator]] [[or]] [[or_eq]] [[override]] [[private]]
+[[protected]] [[public]] [[register]] [[reinterpret_cast]] [[return]] [[short]]
+[[signed]] [[sizeof]] [[static]] [[static_assert]] [[static_cast]] [[struct]]
+[[switch]] [[template]] [[this]] [[thread_local]] [[throw]] [[true]] [[try]]
+[[typedef]] [[typeid]] [[typename]] [[union]] [[unsigned]]
+[[virtual]] [[void]] [[volatile]] [[wchar_t]] [[while]] [[xor]] [[xor_eq]]
+// [[using]]
+int main() {
+    std::cout << "Hello, World!" << std::endl;
+}

@@ -137,8 +138,10 @@ 上のコードでは [[using]] をコメントアウトしているが、これは using キーワードのみ属性構文の中で意味を持つからであり、このコメントアウトを外すとコンパイルに失敗する。
-
// using の例
-[[using foo: attr1, attr2]] int x; // [[foo::attr1, foo::attr2]] の糖衣構文
+
+
// using の例
+[[using foo: attr1, attr2]] int x; // [[foo::attr1, foo::attr2]] の糖衣構文
+
C++17 の仕様も見てみる (正確には標準化前のドラフト)。 -- cgit v1.2.3-70-g09d2