rust/tests/ui/explicit-tail-calls/become-uncallable.rs

//@ run-rustfix
#![expect(incomplete_features)]
#![feature(explicit_tail_calls)]
#![allow(unused)]

fn f() -> u64 {
    become 1; //~ error: `become` requires a function call
}

fn g() {
    become { h() }; //~ error: `become` requires a function call
}

fn h() {
    become *&g(); //~ error: `become` requires a function call
}

fn main() {}
implement checks for tail calls this implements checks necessary to guarantee that we can actually perform a tail call. while extremely restrictive, this is what is documented in the RFC, and all these checks are needed for one reason or another. 2023-05-11 11:43:09 +00:00			`//@ run-rustfix`
use `expect(incomplete_feature)` instead of `allow` in tail call tests 2024-11-29 04:28:02 +01:00			`#![expect(incomplete_features)]`
implement checks for tail calls this implements checks necessary to guarantee that we can actually perform a tail call. while extremely restrictive, this is what is documented in the RFC, and all these checks are needed for one reason or another. 2023-05-11 11:43:09 +00:00			`#![feature(explicit_tail_calls)]`
			`#![allow(unused)]`

			`fn f() -> u64 {`
			become 1; //~ error: `become` requires a function call
			`}`

			`fn g() {`
			become { h() }; //~ error: `become` requires a function call
			`}`

			`fn h() {`
			become *&g(); //~ error: `become` requires a function call
			`}`

			`fn main() {}`