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The core_str_ext feature is no longer needed

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Philipp Oppermann
2015-12-20 15:47:51 +01:00
parent 14166b3a35
commit 74e84c7ea4
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posts/2015-10-23-printing-to-screen.md
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@@ -206,7 +206,7 @@ pub fn write_str(&mut self, s: &str) {
} }
} }
``` ```
You can try it yourself in the `print_something` function. Note that you need to add the `core_str_ext` feature, since `core` is [still unstable][core tracking issue]. You can try it yourself in the `print_something` function.
When you print strings with some special characters like `ä` or `λ`, you'll notice that they cause weird symbols on screen. That's because they are represented by multiple bytes in [UTF-8]. By converting them to bytes, we of course get strange results. But since the VGA buffer doesn't support UTF-8, it's not possible to display these characters anyway. To ensure that a string contains only ASCII characters, you can prefix a `b` to create a [Byte String]. When you print strings with some special characters like `ä` or `λ`, you'll notice that they cause weird symbols on screen. That's because they are represented by multiple bytes in [UTF-8]. By converting them to bytes, we of course get strange results. But since the VGA buffer doesn't support UTF-8, it's not possible to display these characters anyway. To ensure that a string contains only ASCII characters, you can prefix a `b` to create a [Byte String].