rust/tests/ui/const_static_lifetime.rs

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#[derive(Debug)]
struct Foo {}
const VAR_ONE: &'static str = "Test constant #1"; // ERROR Consider removing 'static.
const VAR_TWO: &str = "Test constant #2"; // This line should not raise a warning.
const VAR_THREE: &[&'static str] = &["one", "two"]; // ERROR Consider removing 'static
const VAR_FOUR: (&str, (&str, &'static str), &'static str) = ("on", ("th", "th"), "on"); // ERROR Consider removing 'static
const VAR_FIVE: &'static [&[&'static str]] = &[&["test"], &["other one"]]; // ERROR Consider removing 'static
const VAR_SIX: &'static u8 = &5;
const VAR_SEVEN: &[&(&str, &'static [&'static str])] = &[&("one", &["other one"])];
const VAR_HEIGHT: &'static Foo = &Foo {};
const VAR_SLICE: &'static [u8] = b"Test constant #1"; // ERROR Consider removing 'static.
const VAR_TUPLE: &'static (u8, u8) = &(1, 2); // ERROR Consider removing 'static.
const VAR_ARRAY: &'static [u8; 1] = b"T"; // ERROR Consider removing 'static.
fn main() {
let false_positive: &'static str = "test";
println!("{}", VAR_ONE);
println!("{}", VAR_TWO);
println!("{:?}", VAR_THREE);
println!("{:?}", VAR_FOUR);
println!("{:?}", VAR_FIVE);
println!("{:?}", VAR_SIX);
println!("{:?}", VAR_SEVEN);
println!("{:?}", VAR_HEIGHT);
println!("{}", false_positive);
}
2018-02-02 08:03:21 +01:00
trait Bar {
const TRAIT_VAR: &'static str;
}
impl Foo {
const IMPL_VAR: &'static str = "var";
}
impl Bar for Foo {
const TRAIT_VAR: &'static str = "foo";
}