Struct DataStackToken 

pub struct DataStackToken(/* private fields */);

Marker of a stack position, taken with DataStack::store.

Passing it to DataStack::restore unwinds everything pushed after it, running the drop function of every value on the way. Passing it to DataStack::reverse flips the order of those items instead.

Implementations

impl DataStackToken

pub unsafe fn new(position: usize) -> Self

Builds a token pointing at an arbitrary position.

Safety

position must be a real item boundary of the stack it will be used with. Restoring to a position inside a value leaves the stack reading garbage as type tags.