diff options
| -rw-r--r-- | library/std/src/io/cursor.rs | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/library/std/src/io/cursor.rs b/library/std/src/io/cursor.rs index 25c64240e74..4ef1f1b695e 100644 --- a/library/std/src/io/cursor.rs +++ b/library/std/src/io/cursor.rs @@ -51,6 +51,8 @@ use crate::io::{self, BorrowedCursor, ErrorKind, IoSlice, IoSliceMut, SeekFrom}; /// // We might want to use a BufReader here for efficiency, but let's /// // keep this example focused. /// let mut file = File::create("foo.txt")?; +/// // First, we need to allocate 10 bytes to be able to write into. +/// file.set_len(10)?; /// /// write_ten_bytes_at_end(&mut file)?; /// # Ok(()) |