mirror of https://github.com/rust-lang/rust
36 lines
1.0 KiB
Rust
36 lines
1.0 KiB
Rust
// Test that the borrow checker prevents pointers to temporaries
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// with statement lifetimes from escaping.
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use std::ops::Drop;
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static mut FLAGS: u64 = 0;
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struct StackBox<T> { f: T }
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struct AddFlags { bits: u64 }
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fn AddFlags(bits: u64) -> AddFlags {
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AddFlags { bits: bits }
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}
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fn arg(x: &AddFlags) -> &AddFlags {
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x
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}
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impl AddFlags {
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fn get(&self) -> &AddFlags {
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self
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}
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}
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pub fn main() {
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let x1 = arg(&AddFlags(1)); //~ ERROR temporary value dropped while borrowed
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let x2 = AddFlags(1).get(); //~ ERROR temporary value dropped while borrowed
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let x3 = &*arg(&AddFlags(1)); //~ ERROR temporary value dropped while borrowed
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let ref x4 = *arg(&AddFlags(1)); //~ ERROR temporary value dropped while borrowed
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let &ref x5 = arg(&AddFlags(1)); //~ ERROR temporary value dropped while borrowed
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let x6 = AddFlags(1).get(); //~ ERROR temporary value dropped while borrowed
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let StackBox { f: x7 } = StackBox { f: AddFlags(1).get() };
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//~^ ERROR temporary value dropped while borrowed
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(x1, x2, x3, x4, x5, x6, x7);
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}
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