Module isolate 

Isolated validation: Catch and Transform (Ignore probes the same way from its call sites). These builders take the checks a node carries, its befores and its afters, inside, and validate the node as a whole (those checks, the structural check, every descendant) in a sub-run before the node itself proceeds. Only then is the outcome of the entire subtree known at once; the canonical implementation does the same, since it runs a node’s afters before visiting its children.

Structs

Inner

The checks a Catch or Transform took inside.

Type Aliases

TransformFn

A Transform function: the produced value, and the state it was produced in, to a new value.