Revert "Implement allow-by-default multiple_supertrait_upcastable lint"

[rust.git] / library / core / src / cell / lazy.rs

diff --git a/library/core/src/cell/lazy.rs b/library/core/src/cell/lazy.rs
index b355d94ce4976697ff0226398b040c248f97ee38..19f80daef1d3bc99c162d5ad00d396c6d181b4ce 100644 (file)
--- a/library/core/src/cell/lazy.rs
+++ b/library/core/src/cell/lazy.rs
@@ -35,7 +35,7 @@ pub struct LazyCell<T, F = fn() -> T> {
     init: Cell<Option<F>>,
 }
 
-impl<T, F> LazyCell<T, F> {
+impl<T, F: FnOnce() -> T> LazyCell<T, F> {
     /// Creates a new lazy value with the given initializing function.
     ///
     /// # Examples
@@ -55,9 +55,7 @@ impl<T, F> LazyCell<T, F> {
     pub const fn new(init: F) -> LazyCell<T, F> {
         LazyCell { cell: OnceCell::new(), init: Cell::new(Some(init)) }
     }
-}
 
-impl<T, F: FnOnce() -> T> LazyCell<T, F> {
     /// Forces the evaluation of this lazy value and returns a reference to
     /// the result.
     ///