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Title: 更正有符号整数左移的相关未定义行为描述 by frederick-vs-ja · Pull Request #75 · parallel101/cppguidebook · GitHub

Open Graph Title: 更正有符号整数左移的相关未定义行为描述 by frederick-vs-ja · Pull Request #75 · parallel101/cppguidebook

X Title: 更正有符号整数左移的相关未定义行为描述 by frederick-vs-ja · Pull Request #75 · parallel101/cppguidebook

Description: C++20 起有符号整数的左移的限制变成与无符号整数一样了，见 P1236R1。 C++20 前相关限制被缺陷报告 CWG1457 修改过，应该反映 CWG1457 修改后的状况。

Open Graph Description: C++20 起有符号整数的左移的限制变成与无符号整数一样了，见 P1236R1。 C++20 前相关限制被缺陷报告 CWG1457 修改过，应该反映 CWG1457 修改后的状况。

X Description: C++20 起有符号整数的左移的限制变成与无符号整数一样了，见 P1236R1。 C++20 前相关限制被缺陷报告 CWG1457 修改过，应该反映 CWG1457 修改后的状况。

Opengraph URL: https://github.com/parallel101/cppguidebook/pull/75

X: @github

direct link

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og:image:altC++20 起有符号整数的左移的限制变成与无符号整数一样了，见 P1236R1。 C++20 前相关限制被缺陷报告 CWG1457 修改过，应该反映 CWG1457 修改后的状况。
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