diff options
| -rw-r--r-- | src/librustc_error_codes/error_codes/E0637.md | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/librustc_error_codes/error_codes/E0637.md b/src/librustc_error_codes/error_codes/E0637.md index e114d3d0f94..d9068950bdf 100644 --- a/src/librustc_error_codes/error_codes/E0637.md +++ b/src/librustc_error_codes/error_codes/E0637.md @@ -1,6 +1,7 @@ An underscore `_` character has been used as the identifier for a lifetime. -Erroneous example: +Erroneous code example: + ```compile_fail,E0106,E0637 fn longest<'_>(str1: &'_ str, str2: &'_ str) -> &'_ str { //^^ `'_` is a reserved lifetime name @@ -11,6 +12,7 @@ fn longest<'_>(str1: &'_ str, str2: &'_ str) -> &'_ str { } } ``` + `'_`, cannot be used as a lifetime identifier because it is a reserved for the anonymous lifetime. To fix this, use a lowercase letter such as 'a, or a series of lowercase letters such as `'foo`. For more information, see [the @@ -18,6 +20,7 @@ book][bk-no]. For more information on using the anonymous lifetime in rust nightly, see [the nightly book][bk-al]. Corrected example: + ``` fn longest<'a>(str1: &'a str, str2: &'a str) -> &'a str { if str1.len() > str2.len() { |