attrGeneric

fn attrGeneric(self: *Builder, data: []const u32) Allocator.Error!u32 {
    try self.attributes_map.ensureUnusedCapacity(self.gpa, 1);
    try self.attributes_indices.ensureUnusedCapacity(self.gpa, 1);
    try self.attributes_extra.ensureUnusedCapacity(self.gpa, data.len);

    const Adapter = struct {
        builder: *const Builder,
        pub fn hash(_: @This(), key: []const u32) u32 {
            return @truncate(std.hash.Wyhash.hash(1, std.mem.sliceAsBytes(key)));
        }
        pub fn eql(ctx: @This(), lhs_key: []const u32, _: void, rhs_index: usize) bool {
            const start = ctx.builder.attributes_indices.items[rhs_index];
            const end = ctx.builder.attributes_indices.items[rhs_index + 1];
            return std.mem.eql(u32, lhs_key, ctx.builder.attributes_extra.items[start..end]);
        }
    };
    const gop = self.attributes_map.getOrPutAssumeCapacityAdapted(data, Adapter{ .builder = self });
    if (!gop.found_existing) {
        self.attributes_extra.appendSliceAssumeCapacity(data);
        self.attributes_indices.appendAssumeCapacity(@intCast(self.attributes_extra.items.len));
    }
    return @intCast(gop.index);
}