`error: TODO: implement @ptrCast between slices changing the length`

[nektro]

Zig Version

0.12.0

Steps to Reproduce and Observed Behavior

const std = @import("std");
const builtin = @import("builtin");

test {
    const a: u32 = 0xCE94C13E;
    const b: *const u32 = &a;
    const c: []const u32 = b[0..1];
    const d: []const u8 = @ptrCast(c);
    comptime std.debug.assert(builtin.target.cpu.arch.endian() == .little);
    try std.testing.expect(std.mem.eql(u8, d, &.{ 0x3E, 0xC1, 0x94, 0xCE }));
}

test.zig:8:27: error: TODO: implement @ptrCast between slices changing the length
    const d: []const u8 = @ptrCast(c);
                          ^~~~~~~~~~~

Expected Behavior

all 1 tests passed.

have known about this error for quite some time but ran into it again just now and noticed there was no explicit tracking issue for it

[nektro]

for future readers: std.mem.sliceAsBytes served me plenty well enough for now

[mlugg]

This is now implemented.