diff options
| -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 69b07912e57..f8511bc9c7d 100644 --- a/src/librustc_borrowck/diagnostics.rs +++ b/src/librustc_borrowck/diagnostics.rs @@ -1189,6 +1189,7 @@ yield point. ```compile_fail,E0624 # #![feature(generators)] +# use std::ops::Generator; let mut b = || { let a = &3; // <-- This borrow... yield (); // ...is still in scope here, when the yield occurs. @@ -1206,6 +1207,7 @@ the integer by value: ``` # #![feature(generators)] +# use std::ops::Generator; let mut b = || { let a = 3; yield (); @@ -1222,6 +1224,7 @@ This error also frequently arises with iteration: ```compile_fail,E0624 # #![feature(generators)] +# use std::ops::Generator; let mut b = || { let v = vec![1,2,3]; for &x in &v { // <-- borrow of `v` is still in scope... @@ -1236,6 +1239,7 @@ Such cases can sometimes be resolved by iterating "by value" (or using ``` # #![feature(generators)] +# use std::ops::Generator; let mut b = || { let v = vec![1,2,3]; for x in v { // <-- Take ownership of the values instead! @@ -1249,6 +1253,7 @@ If taking ownership is not an option, using indices can work too: ``` # #![feature(generators)] +# use std::ops::Generator; let mut b = || { let v = vec![1,2,3]; let len = v.len(); // (*) |