Struct CounterPayload 

#[repr(C)]
pub struct CounterPayload {
    pub key_descriptor: *const TypeDescriptor,
    pub entries: HashMap<DynamicKey, GcRef>,
}

The Counter[T] payload (§6.2, §11.3). A map whose values are always Int and whose absent keys read as zero. Backed by HashMap<DynamicKey, GcRef> where each value is a boxed Int; the key descriptor selects hash/eq.

Fields

key_descriptor: *const TypeDescriptor

The descriptor for every key, or null when the construction site had no static key type. A label, not the authority: each key’s DynamicKey carries its own. Read it through CounterPayload::key.

entries: HashMap<DynamicKey, GcRef>

The entries: key → boxed Int value.

Implementations

impl CounterPayload

pub fn key(&self) -> Option<&'static TypeDescriptor>

The key label, or None when this counter was never told its key type.