Commit b8cb780230197ce7e7e3059c7e37e1a40d9dcfc2 | zig

author	Erik Schlyter <erik@erisc.se> 2026-02-14 23:06:28+01:00
committer	Ryan Liptak <squeek502@hotmail.com> 2026-05-30 02:27:54+02:00
log	b8cb780230197ce7e7e3059c7e37e1a40d9dcfc2
tree	95ac25d570b15798bf5a46efbe9f63ebdf1ee369
parent	b3c6a3b047cb248afb0d61ae723ae41aeab9289b

std.Io.Writer: Make Hashing support pointers.

The line `const hasher = &this.hasher` was making the local variable
`hasher` a double-pointer when `Hasher` already is a pointer to a
hasher, which the line `hasher.update` would not dereference. By
removing the local `hasher` value we allow `Hashing` to accept pointer
types as well.

The contrasting `Hashed` function already follows this pattern.

1 files changed, 3 insertions(+), 4 deletions(-)

lib
- std
  - Io
    Writer.zig

lib/std/Io/Writer.zig+3-4

 @@ -2524,15 +2524,14 @@ pub fn Hashing(comptime Hasher: type) type {
         fn drain(w: *Writer, data: []const []const u8, splat: usize) Error!usize {
             const this: *@This() = @alignCast(@fieldParentPtr("writer", w));
-            const hasher = &this.hasher;
+            this.hasher.update(w.buffered());
-            hasher.update(w.buffered());
             w.end = 0;
             var n: usize = 0;
             for (data[0 .. data.len - 1]) |slice| {
-                hasher.update(slice);
+                this.hasher.update(slice);
                 n += slice.len;
             }
-            for (0..splat) |_| hasher.update(data[data.len - 1]);
+            for (0..splat) |_| this.hasher.update(data[data.len - 1]);
             return n + splat * data[data.len - 1].len;
         }
     };