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Don't import println in main.rs

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Philipp Oppermann
2018-12-09 12:24:30 +01:00
parent 4fd5545e2d
commit 4a257c6bad
1 changed files with 1 additions and 3 deletions
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4
blog/content/second-edition/posts/03-vga-text-buffer/index.md
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@@ -628,8 +628,6 @@ Now we can use `println` in our `_start` function:
```rust ```rust
// in src/main.rs // in src/main.rs
use crate::println;
#[no_mangle] #[no_mangle]
pub extern "C" fn _start() { pub extern "C" fn _start() {
println!("Hello World{}", "!"); println!("Hello World{}", "!");
@@ -638,7 +636,7 @@ pub extern "C" fn _start() {
} }
``` ```
We have to explicitly import the `println` macro in order to use it. This is different from the standard library where the `println` macro is implicitly imported. Note that the macros live directly under the crate root (i.e. `crate::println` instead of `crate::vga_buffer::println`) because of the `#[macro_export]` attribute. Note that we don't have to import the macro in the main function, because it already lives in the root namespace.
As expected, we now see a _“Hello World!”_ on the screen: As expected, we now see a _“Hello World!”_ on the screen: