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Merge pull request #135 from phil-opp/phil-opp-patch-1

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Add `#[allow(dead_code)]` to Color enum
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Philipp Oppermann
2016-02-22 07:30:54 +01:00
parent aea5054cf3 8b2ec752b7
commit 75aa669cdb
1 changed files with 3 additions and 0 deletions
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posts/2015-10-23-printing-to-screen.md
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@@ -58,6 +58,7 @@ All of the code below goes into our new module (unless specified otherwise).
First, we represent the different colors using an enum:
```rust
#[allow(dead_code)]
#[repr(u8)]
pub enum Color {
Black = 0,
@@ -82,6 +83,8 @@ We use a [C-like enum] here to explicitly specify the number for each color. Bec
[C-like enum]: http://rustbyexample.com/custom_types/enum/c_like.html
Normally the compiler would issue a warning for each unused variant. By using the `#[allow(dead_code)]` attribute we disable these warnings for the `Color` enum.
To represent a full color code that specifies foreground and background color, we create a [newtype] on top of `u8`:
[newtype]: https://aturon.github.io/features/types/newtype.html