rain stream
I'm converting some old code to the new linked list API.
const EntityData = struct {
tile_nodes: [num_nodes_per_entity]std.SinglyLinkedList.Node,
};
Given a *std.SinglyLinkedList.Node, how can I get to the parent *EntityData?
I tried just @fieldParentPtr("tile_nodes", node), but got expected type '*[16]SinglyLinkedList.Node', found '*SinglyLinkedList.Node'
vague harness
@fieldParentPtr is about going from &something.field to &something.
It does that by knowing the offset between the two and being told which field you're pointing at.
That offset is part of the type definition.
rain stream
Hmm. I guess I will have to completely rework it 🤔
vague harness
You'd need to have a way to figure out, or know, which Node you're pointing at.
If it even is one of those 16.
You could consider doing pointer arithmetic.
You'd need to already know &something.tile_nodes[0] for that however
rain stream
Thanks for the pointers (ha). I will have to think about this some more.