mirror of https://github.com/rust-lang/rust
88 lines
1.7 KiB
Rust
88 lines
1.7 KiB
Rust
// Tests that two closures cannot simultaneously have mutable
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// and immutable access to the variable. Issue #6801.
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fn get(x: &isize) -> isize {
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*x
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}
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fn set(x: &mut isize) {
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*x = 4;
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}
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fn a() {
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let mut x = 3;
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let c1 = || x = 4;
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let c2 = || x * 5;
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//~^ ERROR cannot borrow `x` as immutable because it is also borrowed as mutable
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drop(c1);
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}
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fn b() {
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let mut x = 3;
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let c1 = || set(&mut x);
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let c2 = || get(&x);
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//~^ ERROR cannot borrow `x` as immutable because it is also borrowed as mutable
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drop(c1);
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}
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fn c() {
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let mut x = 3;
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let c1 = || set(&mut x);
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let c2 = || x * 5;
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//~^ ERROR cannot borrow `x` as immutable because it is also borrowed as mutable
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drop(c1);
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}
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fn d() {
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let mut x = 3;
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let c2 = || x * 5;
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x = 5;
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//~^ ERROR cannot assign to `x` because it is borrowed
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drop(c2);
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}
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fn e() {
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let mut x = 3;
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let c1 = || get(&x);
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x = 5;
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//~^ ERROR cannot assign to `x` because it is borrowed
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drop(c1);
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}
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fn f() {
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let mut x: Box<_> = Box::new(3);
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let c1 = || get(&*x);
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*x = 5;
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//~^ ERROR cannot assign to `*x` because it is borrowed
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drop(c1);
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}
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fn g() {
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struct Foo {
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f: Box<isize>
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}
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let mut x: Box<_> = Box::new(Foo { f: Box::new(3) });
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let c1 = || get(&*x.f);
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*x.f = 5;
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//~^ ERROR cannot assign to `*x.f` because it is borrowed
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drop(c1);
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}
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fn h() {
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struct Foo {
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f: Box<isize>
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}
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let mut x: Box<_> = Box::new(Foo { f: Box::new(3) });
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let c1 = || get(&*x.f);
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let c2 = || *x.f = 5;
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//~^ ERROR cannot borrow `x` as mutable because it is also borrowed as immutable
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drop(c1);
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}
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fn main() {
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}
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