Class BoundednessWalk

java.lang.Object

org.ek9lang.compiler.support.streams.BoundednessWalk

All Implemented Interfaces:

BiFunction<List<EK9Parser.StreamPartContext>, Boolean, Boundedness>

public final class BoundednessWalk
extends Object
implements BiFunction<List<EK9Parser.StreamPartContext>, Boolean, Boundedness>

THE walk of a pipeline whose source may be unbounded: head bounds the stream; while it is not bounded every stage needsBounded accepts is a violation; and once an async has run on the unbounded stream, an async barrier (IsAsyncBarrier) is a violation even after a head. The arguments are the pipeline's stages in order and whether the source itself is bounded.

Constructor Summary

Constructors

Constructor	Description
BoundednessWalk(Predicate<EK9Parser.StreamPartContext> needsBounded)	A walk for one rule of what needs a bounded stream.

Method Summary

Modifier and Type	Method	Description
Boundedness	apply(List<EK9Parser.StreamPartContext> stages, Boolean sourceBounded)

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface BiFunction

andThen

Constructor Details

BoundednessWalk

public BoundednessWalk(Predicate<EK9Parser.StreamPartContext> needsBounded)

A walk for one rule of what needs a bounded stream.

Parameters:

needsBounded - which stages need a bounded stream (the caller's rule: memory or never-completes)

Method Details

apply

public Boundedness apply(List<EK9Parser.StreamPartContext> stages,
 Boolean sourceBounded)

Specified by:

apply in interface BiFunction<List<EK9Parser.StreamPartContext>, Boolean, Boundedness>