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Use -> ! to test divergence

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This commit is contained in:
Nadrieril 2024-01-22 16:14:17 +01:00
parent d1f1075931
commit c5a4e074f0
1 changed files with 8 additions and 5 deletions
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13
tests/ui/rfcs/rfc-0000-never_patterns/diverges.rs
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@ -9,21 +9,24 @@ enum Void {}
// A never pattern alone diverges. // A never pattern alone diverges.
fn never_arg(!: Void) -> u32 {} fn never_arg(!: Void) -> ! {}
fn ref_never_arg(&!: &Void) -> u32 {} fn never_arg_returns_anything<T>(!: Void) -> T {}
fn never_let() -> u32 { fn ref_never_arg(&!: &Void) -> ! {}
fn never_let() -> ! {
let ptr: *const Void = std::ptr::null(); let ptr: *const Void = std::ptr::null();
unsafe { unsafe {
let ! = *ptr; let ! = *ptr;
} }
} }
fn never_match() -> u32 { fn never_match() -> ! {
let ptr: *const Void = std::ptr::null(); let ptr: *const Void = std::ptr::null();
unsafe { unsafe {
match *ptr { ! }; match *ptr { ! };
} }
println!(); // Ensures this typechecks because of divergence. // Ensures this typechecks because of divergence and not the type of the match expression.
println!();
} }