Improve is_err_with example.

45dee47f · Mara Bos · 148234ff · 45dee47f
隐藏空白更改
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Showing with 8 addition and 6 deletion

library/core/src/result.rs library/core/src/result.rs +8 -6

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--- a/library/core/src/result.rs
+++ b/library/core/src/result.rs
@@ -589,14 +589,16 @@ pub const fn is_err(&self) -> bool {
    /// # Examples
    ///
    /// ```
-    /// let x: Result<u32, &str> = Err("abc");
-    /// assert_eq!(x.is_err_with(|x| x.len() > 1), true);
+    /// use std::io::{Error, ErrorKind};
    ///
-    /// let x: Result<u32, &str> = Err("");
-    /// assert_eq!(x.is_ok_with(|x| x.len() > 1), false);
+    /// let x: Result<u32, Error> = Err(Error::new(ErrorKind::NotFound, "!"));
+    /// assert_eq!(x.is_err_with(|x| x.kind() == ErrorKind::NotFound), true);
    ///
-    /// let x: Result<u32, &str> = Ok(123);
-    /// assert_eq!(x.is_ok_with(|x| x.len() > 1), false);
+    /// let x: Result<u32, Error> = Err(Error::new(ErrorKind::PermissionDenied, "!"));
+    /// assert_eq!(x.is_ok_with(|x| x.kind() == ErrorKind::NotFound), false);
+    ///
+    /// let x: Result<u32, Error> = Ok(123);
+    /// assert_eq!(x.is_ok_with(|x| x.kind() == ErrorKind::NotFound), false);
    /// ```
    #[must_use]
    #[inline]