std :: isgraph断言，该如何解决? [英] std::isgraph asserts, how to fix?

问题描述

调用 std::isgraph 时，我得到以下断言:

Im getting the following assert when calling std::isgraph:

_ASSERTE(c >= -1 && c <= 255);

这是在Windows平台上构建的unicode，但是语言环境报告为"c".为了支持unicode，我应该将语言环境设置为什么?

It's a unicode built on Windows platform, but the locale is reported as "c". What should I set the locale to in order to support unicode ?

推荐答案

没事.

std::isgraph与Unicode无关.

std::isgraph has nothing to do with Unicode.

特别是，它不能支持您提到的范围之外的任何字符值.

In particular, it cannot support any character value out of the range you've mentioned.

当然，您可以向它传递[UTF-8]代码点的各个字节，但这不会告诉您任何内容.

You could pass it individual bytes of a [say, UTF-8] codepoint, sure, but that wouldn't tell you anything.

它根本不是为您要执行的操作而设计的.

It's simply not designed for what you're trying to do.

请改用ICU之类的适当库.

Use a proper library like ICU instead.

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