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Rollup merge of #27699 - nathankleyn:diagnostics-383, r=Manishearth

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This adds detailed diagnostics for `E0383`, 'partial reinitialization of
uninitialized structure'.

This is part of rust-lang/rust#24407.

r? @Manishearth
This commit is contained in:
Manish Goregaokar 2015-08-13 14:17:06 +05:30
commit 9d0bca42e0
1 changed files with 21 additions and 1 deletions
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22
src/librustc_borrowck/diagnostics.rs
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@ -138,6 +138,27 @@ Book:
https://doc.rust-lang.org/book/ownership.html
"##,
E0383: r##"
This error occurs when an attempt is made to partially reinitialize a
structure that is currently uninitialized.
For example, this can happen when a drop has taken place:
```
let mut x = Foo { a: 1 };
drop(x); // `x` is now uninitialized
x.a = 2; // error, partial reinitialization of uninitialized structure `t`
```
This error can be fixed by fully reinitializing the structure in question:
```
let mut x = Foo { a: 1 };
drop(x);
x = Foo { a: 2 };
```
"##,
E0384: r##"
This error occurs when an attempt is made to reassign an immutable variable.
For example:
@ -217,7 +238,6 @@ https://doc.rust-lang.org/std/cell/
}
register_diagnostics! {
E0383, // partial reinitialization of uninitialized structure
E0385, // {} in an aliasable location
E0386, // {} in an immutable container
E0388, // {} in a static location