Class PresentNestedLists

java.lang.Object

org.ek9lang.compiler.ir.instructions.PresentNestedLists

final class PresentNestedLists
extends Object

THE handling of a composite's nested list that may be absent (null): an absent list is not listed (add(List, String, List, CompositeInstr.Activation), for CompositeInstr.nestedLists()) and stays absent when the lists are rewritten (rewritten(List, UnaryOperator), for CompositeInstr.withNestedLists(UnaryOperator)). A composite holds one (a constant: instructions are many) rather than repeating either step.

Constructor Summary

Constructors

Constructor	Description
PresentNestedLists()

Method Summary

Modifier and Type	Method	Description
(package private) void	add(List<CompositeInstr.NestedList> lists, String role, List<IRInstr> instructions, CompositeInstr.Activation activation)	Add instructions to lists as a nested list, unless it is absent.
(package private) List<IRInstr>	rewritten(List<IRInstr> list, UnaryOperator<List<IRInstr>> rewrite)	Null-safe application of a list rewrite: an absent list stays absent.

Methods inherited from class Object

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

Constructor Details

PresentNestedLists

PresentNestedLists()

Method Details

add

void add(List<CompositeInstr.NestedList> lists,
 String role,
 List<IRInstr> instructions,
 CompositeInstr.Activation activation)

Add instructions to lists as a nested list, unless it is absent.

rewritten

List<IRInstr> rewritten(List<IRInstr> list,
 UnaryOperator<List<IRInstr>> rewrite)

Null-safe application of a list rewrite: an absent list stays absent.