mirror of https://github.com/rust-lang/rust
32 lines
958 B
Rust
32 lines
958 B
Rust
// Check that we assert that pointers have a common subtype for comparisons
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fn compare_const<'a, 'b>(x: *const &mut &'a i32, y: *const &mut &'b i32) {
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x == y;
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//~^ ERROR lifetime may not live long enough
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//~| ERROR lifetime may not live long enough
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}
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fn compare_mut<'a, 'b>(x: *mut &'a i32, y: *mut &'b i32) {
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x == y;
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//~^ ERROR lifetime may not live long enough
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//~| ERROR lifetime may not live long enough
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}
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fn compare_fn_ptr<'a, 'b, 'c>(f: fn(&'c mut &'a i32), g: fn(&'c mut &'b i32)) {
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f == g;
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//~^ ERROR lifetime may not live long enough
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//~| ERROR lifetime may not live long enough
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}
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fn compare_hr_fn_ptr<'a>(f: fn(&'a i32), g: fn(&i32)) {
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// Ideally this should compile with the operands swapped as well, but HIR
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// type checking prevents it (and stops compilation) for now.
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f == g; // OK
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}
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fn compare_const_fn_ptr<'a>(f: *const fn(&'a i32), g: *const fn(&i32)) {
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f == g; // OK
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}
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fn main() {}
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