Module vm_closure_handle 

VmClosureHandle — a read-only shim over the raw closure backing.

Closure spec §14.2

Closure state is stored in crate::heap_value::HeapValue::ClosureRaw, backed by a raw *const TypedClosureHeader block whose capture layout is described by a ClosureLayout. VmClosureHandle is the stable read API over that backing — readers go through the handle so any future backing changes remain contained.

Track A.5 retired the legacy HeapValue::Closure { function_id, upvalues } variant and its ClosureBacking::Legacy shim variant — every closure is now ClosureRaw-backed.

API surface

handle.function_id()          // u32 function table index
handle.type_id()              // u32 ClosureTypeId
handle.capture_count()
handle.capture_as_value(i)    // widen capture i to ValueWord
handle.captures_as_values()   // Vec<ValueWord> of all captures
handle.refcount()             // exact refcount on the block

Structs

VmClosureHandle

Read-only handle to a closure’s function id, type id, and captures.