rust/tests/ui/index_refutable_slice/slice_indexing_in_macro.rs

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#![deny(clippy::index_refutable_slice)]
//@no-rustfix: need to change the suggestion to a multipart suggestion
extern crate if_chain;
use if_chain::if_chain;
macro_rules! if_let_slice_macro {
() => {
// This would normally be linted
let slice: Option<&[u32]> = Some(&[1, 2, 3]);
if let Some(slice) = slice {
println!("{}", slice[0]);
}
};
}
fn main() {
// Don't lint this
if_let_slice_macro!();
// Do lint this
if_chain! {
let slice: Option<&[u32]> = Some(&[1, 2, 3]);
if let Some(slice) = slice;
//~^ ERROR: this binding can be a slice pattern to avoid indexing
then {
println!("{}", slice[0]);
}
}
}