Use core::error::Error

Author: cuviper

src/lib.rs

@@ -255,9 +255,7 @@ impl core::fmt::Display for TryReserveError {
     }
 }
 
-#[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-impl std::error::Error for TryReserveError {}
+impl core::error::Error for TryReserveError {}
 
 // NOTE: This is copied from the slice module in the std lib.
 /// The error type returned by [`get_disjoint_indices_mut`][`IndexMap::get_disjoint_indices_mut`].
@@ -285,6 +283,4 @@ impl core::fmt::Display for GetDisjointMutError {
     }
 }
 
-#[cfg(feature = "std")]
-#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
-impl std::error::Error for GetDisjointMutError {}
+impl core::error::Error for GetDisjointMutError {}