Module nested 

Nested bodies: foreach/batch (dynamic fan-out over an array, batches with bounded parallelism and rate pacing, per-batch durable progress, positional collection, on_error: continue slots), iterate (a bounded structured loop with while/until/ max_iterations), parallel (static branches, fan-in object), race (first branch to finish wins, the rest are cancelled) and subgraph (an inline sub-DAG). Body steps are ordinary steps executed under a scope: their run-record ids are <parent>[<index>].<step> (elements / iterations), <parent>{<branch>}.<step> (branches) or <parent>.<step> (subgraph); templates inside a body see item, index, batch, iteration, branch and steps.<sibling> resolved within the scope. The parent step’s wait record carries the durable progress.

Structs

Scope

The scope a nested step runs in.

Segment

One segment of a scoped id: name, name[i], name{branch}.

Enums

BodyState

The state of one body instance.

Functions

is_scoped

Whether an id is nested (has a scope).

parent_of

The parent scope of a scoped id (each[3].classify → each[3]).

parse_scoped

Parse each[3].classify → [each[3], classify].

scoped_id

The scoped id of a body step.

strip_scope_suffix

each[3] → each; par{a} → par; sub → sub; nested x[1].y[2] → x[1].y.