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When writing a no_std binary, you'll be greeted with nonsensical errors mentioning lang items like eh_personality and start. That's pretty bad because it makes you think that you need to define them somewhere! But oh no, now you're getting the `internal_features` lint telling you that you shouldn't use them! But you need a no_std binary! What now? No problem! Writing a no_std binary is super easy. Just use panic=abort and supply your own platform specific entrypoint symbol (like `main`) and you're good to go. Would be nice if the compiler told you that, right? This makes it so that it does do that.
11 lines
203 B
Rust
11 lines
203 B
Rust
// edition: 2018
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#![feature(lang_items, no_core)]
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#![no_core]
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#![no_main]
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#[lang="copy"] pub trait Copy { }
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#[lang="sized"] pub trait Sized { }
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async fn x() {} //~ ERROR requires `ResumeTy` lang_item
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