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| author | John Kåre Alsaker <john.kare.alsaker@gmail.com> | 2017-07-15 22:40:46 +0200 |
|---|---|---|
| committer | John Kåre Alsaker <john.kare.alsaker@gmail.com> | 2017-07-28 15:46:27 +0200 |
| commit | 4628f8534f0bff482e22bc394e35934ff1573a26 (patch) | |
| tree | a7d372a59bdd73e51e99f974e4641beb15436022 | |
| parent | f5ec50358a7d7a4313434e0726e63e1f08ee7cc3 (diff) | |
| download | rust-4628f8534f0bff482e22bc394e35934ff1573a26.tar.gz rust-4628f8534f0bff482e22bc394e35934ff1573a26.zip | |
Fix error message tests
| -rw-r--r-- | src/librustc_borrowck/diagnostics.rs | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/librustc_borrowck/diagnostics.rs b/src/librustc_borrowck/diagnostics.rs index 14454267c99..69b07912e57 100644 --- a/src/librustc_borrowck/diagnostics.rs +++ b/src/librustc_borrowck/diagnostics.rs @@ -1188,6 +1188,7 @@ This error occurs because a borrow in a generator persists across a yield point. ```compile_fail,E0624 +# #![feature(generators)] let mut b = || { let a = &3; // <-- This borrow... yield (); // ...is still in scope here, when the yield occurs. @@ -1204,6 +1205,7 @@ resolve the previous example by removing the borrow and just storing the integer by value: ``` +# #![feature(generators)] let mut b = || { let a = 3; yield (); @@ -1219,6 +1221,7 @@ in those cases, something like the `Rc` or `Arc` types may be useful. This error also frequently arises with iteration: ```compile_fail,E0624 +# #![feature(generators)] let mut b = || { let v = vec![1,2,3]; for &x in &v { // <-- borrow of `v` is still in scope... @@ -1232,6 +1235,7 @@ Such cases can sometimes be resolved by iterating "by value" (or using `into_iter()`) to avoid borrowing: ``` +# #![feature(generators)] let mut b = || { let v = vec![1,2,3]; for x in v { // <-- Take ownership of the values instead! @@ -1244,6 +1248,7 @@ b.resume(); If taking ownership is not an option, using indices can work too: ``` +# #![feature(generators)] let mut b = || { let v = vec![1,2,3]; let len = v.len(); // (*) |