mirror of https://github.com/rust-lang/rust
44 lines
885 B
Rust
44 lines
885 B
Rust
// Test how overloaded deref interacts with borrows when only
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// Deref and not DerefMut is implemented.
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use std::ops::Deref;
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use std::rc::Rc;
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fn deref_imm(x: Rc<isize>) {
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let __isize = &*x;
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}
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fn deref_mut1(x: Rc<isize>) {
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let __isize = &mut *x; //~ ERROR cannot borrow
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}
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fn deref_mut2(mut x: Rc<isize>) {
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let __isize = &mut *x; //~ ERROR cannot borrow
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}
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fn deref_extend<'a>(x: &'a Rc<isize>) -> &'a isize {
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&**x
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}
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fn deref_extend_mut1<'a>(x: &'a Rc<isize>) -> &'a mut isize {
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&mut **x //~ ERROR cannot borrow
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}
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fn deref_extend_mut2<'a>(x: &'a mut Rc<isize>) -> &'a mut isize {
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&mut **x //~ ERROR cannot borrow
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}
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fn assign1<'a>(x: Rc<isize>) {
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*x = 3; //~ ERROR cannot assign
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}
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fn assign2<'a>(x: &'a Rc<isize>) {
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**x = 3; //~ ERROR cannot assign
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}
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fn assign3<'a>(x: &'a mut Rc<isize>) {
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**x = 3; //~ ERROR cannot assign
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}
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pub fn main() {}
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