mirror/zig
1
0
Fork 0
mirror of https://github.com/ziglang/zig.git synced 2025-12-06 06:13:07 +00:00
Code Issues Packages Projects Releases Wiki Activity

use pointer subtraction

Browse Source
This commit is contained in:
marko 2025-09-11 00:14:01 +02:00 committed by Andrew Kelley
parent bfda12efcf
commit fb3afc8d3d
1 changed files with 1 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
lib/std/hash_map.zig
View File

@ -1267,12 +1267,11 @@ pub fn HashMapUnmanaged(
/// TODO: answer the question in these doc comments, does this
/// increase the unused capacity by one?
pub fn removeByPtr(self: *Self, key_ptr: *K) void {
// TODO: replace with pointer subtraction once supported by zig
// if @sizeOf(K) == 0 then there is at most one item in the hash
// map, which is assumed to exist as key_ptr must be valid. This
// item must be at index 0.
const idx = if (@sizeOf(K) > 0)
(@intFromPtr(key_ptr) - @intFromPtr(self.keys())) / @sizeOf(K)
(key_ptr - self.keys())
else
0;