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Diffstat (limited to '')
| -rw-r--r-- | library/core/src/ops/function.rs | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/library/core/src/ops/function.rs b/library/core/src/ops/function.rs index 8fdf22cf6..2e0a752c8 100644 --- a/library/core/src/ops/function.rs +++ b/library/core/src/ops/function.rs @@ -71,6 +71,7 @@ )] #[fundamental] // so that regex can rely that `&str: !FnMut` #[must_use = "closures are lazy and do nothing unless called"] +#[cfg_attr(not(bootstrap), const_trait)] pub trait Fn<Args>: FnMut<Args> { /// Performs the call operation. #[unstable(feature = "fn_traits", issue = "29625")] @@ -158,6 +159,7 @@ pub trait Fn<Args>: FnMut<Args> { )] #[fundamental] // so that regex can rely that `&str: !FnMut` #[must_use = "closures are lazy and do nothing unless called"] +#[cfg_attr(not(bootstrap), const_trait)] pub trait FnMut<Args>: FnOnce<Args> { /// Performs the call operation. #[unstable(feature = "fn_traits", issue = "29625")] @@ -237,6 +239,7 @@ pub trait FnMut<Args>: FnOnce<Args> { )] #[fundamental] // so that regex can rely that `&str: !FnMut` #[must_use = "closures are lazy and do nothing unless called"] +#[cfg_attr(not(bootstrap), const_trait)] pub trait FnOnce<Args> { /// The returned type after the call operator is used. #[lang = "fn_once_output"] |