87 lines
2.0 KiB
Rust
87 lines
2.0 KiB
Rust
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// Test that arrays are completely captured by closures by relying on the borrow check diagnostics
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#![feature(capture_disjoint_fields)]
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//~^ WARNING: the feature `capture_disjoint_fields` is incomplete
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fn arrays_1() {
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let mut arr = [1, 2, 3, 4, 5];
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let mut c = || {
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arr[0] += 10;
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};
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// c will capture `arr` completely, therefore another index into the
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// array can't be modified here
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arr[1] += 10;
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//~^ ERROR: cannot use `arr` because it was mutably borrowed
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//~| ERROR: cannot use `arr[_]` because it was mutably borrowed
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c();
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}
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fn arrays_2() {
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let mut arr = [1, 2, 3, 4, 5];
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let c = || {
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println!("{:#?}", &arr[3..4]);
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};
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// c will capture `arr` completely, therefore another index into the
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// array can't be modified here
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arr[1] += 10;
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//~^ ERROR: cannot assign to `arr[_]` because it is borrowed
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c();
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}
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fn arrays_3() {
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let mut arr = [1, 2, 3, 4, 5];
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let c = || {
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println!("{}", arr[3]);
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};
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// c will capture `arr` completely, therefore another index into the
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// array can't be modified here
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arr[1] += 10;
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//~^ ERROR: cannot assign to `arr[_]` because it is borrowed
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c();
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}
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fn arrays_4() {
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let mut arr = [1, 2, 3, 4, 5];
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let mut c = || {
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arr[1] += 10;
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};
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// c will capture `arr` completely, therefore we cannot borrow another index
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// into the array.
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println!("{}", arr[3]);
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//~^ ERROR: cannot use `arr` because it was mutably borrowed
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//~| ERROR: cannot borrow `arr[_]` as immutable because it is also borrowed as mutable
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c();
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}
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fn arrays_5() {
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let mut arr = [1, 2, 3, 4, 5];
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let mut c = || {
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arr[1] += 10;
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};
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// c will capture `arr` completely, therefore we cannot borrow other indecies
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// into the array.
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println!("{:#?}", &arr[3..2]);
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//~^ ERROR: cannot borrow `arr` as immutable because it is also borrowed as mutable
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c();
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}
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fn main() {
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arrays_1();
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arrays_2();
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arrays_3();
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arrays_4();
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arrays_5();
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}
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