31 lines
917 B
Rust
31 lines
917 B
Rust
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// ignore-tidy-linelength
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// Test various things that we do not want to promote.
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#![allow(unconditional_panic, const_err)]
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#![feature(const_fn, const_fn_union)]
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// We do not promote mutable references.
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static mut TEST1: Option<&mut [i32]> = Some(&mut [1, 2, 3]); //~ ERROR temporary value dropped while borrowed
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static mut TEST2: &'static mut [i32] = {
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let x = &mut [1,2,3]; //~ ERROR temporary value dropped while borrowed
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x
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};
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// We do not promote fn calls in `fn`, including `const fn`.
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pub const fn promote_cal(b: bool) -> i32 {
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const fn foo() { [()][42] }
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if b {
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let _x: &'static () = &foo(); //~ ERROR temporary value dropped while borrowed
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}
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13
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}
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// We do not promote union field accesses in `fn.
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union U { x: i32, y: i32 }
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pub const fn promote_union() {
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let _x: &'static i32 = &unsafe { U { x: 0 }.x }; //~ ERROR temporary value dropped while borrowed
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}
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fn main() {}
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