37 lines
1.7 KiB
Rust
37 lines
1.7 KiB
Rust
// revisions: ast mir
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//[mir]compile-flags: -Zborrowck=mir
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fn test_drop_replace() {
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let b: Box<isize>;
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//[mir]~^ HELP make this binding mutable
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//[mir]~| SUGGESTION mut b
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b = Box::new(1); //[ast]~ NOTE first assignment
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//[mir]~^ NOTE first assignment
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b = Box::new(2); //[ast]~ ERROR cannot assign twice to immutable variable
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//[mir]~^ ERROR cannot assign twice to immutable variable `b`
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//[ast]~| NOTE cannot assign twice to immutable
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//[mir]~| NOTE cannot assign twice to immutable
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}
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fn test_call() {
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let b = Box::new(1); //[ast]~ NOTE first assignment
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//[mir]~^ NOTE first assignment
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//[mir]~| HELP make this binding mutable
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//[mir]~| SUGGESTION mut b
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b = Box::new(2); //[ast]~ ERROR cannot assign twice to immutable variable
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//[mir]~^ ERROR cannot assign twice to immutable variable `b`
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//[ast]~| NOTE cannot assign twice to immutable
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//[mir]~| NOTE cannot assign twice to immutable
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}
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fn test_args(b: Box<i32>) { //[ast]~ NOTE first assignment
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//[mir]~^ HELP make this binding mutable
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//[mir]~| SUGGESTION mut b
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b = Box::new(2); //[ast]~ ERROR cannot assign twice to immutable variable
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//[mir]~^ ERROR cannot assign to immutable argument `b`
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//[ast]~| NOTE cannot assign twice to immutable
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//[mir]~| NOTE cannot assign to immutable argument
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}
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fn main() {}
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