@Override
public RubyNode visitMultipleAsgnNode(org.jruby.ast.MultipleAsgn19Node node) {
final SourceSection sourceSection = translate(node.getPosition());
// (MultipleAsgn19Node 0, (ArrayNode 0, (LocalAsgnNode:a 0, ), (LocalAsgnNode:b 0, )), null,
// null))
final int arrayIndex = index;
final String arrayName = methodBodyTranslator.getEnvironment().allocateLocalTemp("destructure");
final FrameSlot arraySlot = methodBodyTranslator.getEnvironment().declareVar(arrayName);
pushArraySlot(arraySlot);
final List<org.jruby.ast.Node> childNodes = node.childNodes().get(0).childNodes();
final List<RubyNode> notNilSequence = new ArrayList<>();
for (int n = 0; n < childNodes.size(); n++) {
index = n;
notNilSequence.add(childNodes.get(n).accept(this));
}
final RubyNode notNil = SequenceNode.sequence(context, sourceSection, notNilSequence);
popArraySlot(arraySlot);
final List<RubyNode> nilSequence = new ArrayList<>();
if (!childNodes.isEmpty()) {
// We haven't pushed a new array slot, so this will read the value which we couldn't convert
// to an array into the first destructured argument
index = arrayIndex;
nilSequence.add(childNodes.get(0).accept(this));
}
final RubyNode nil = SequenceNode.sequence(context, sourceSection, nilSequence);
return SequenceNode.sequence(
context,
sourceSection,
WriteLocalVariableNodeFactory.create(
context,
sourceSection,
arraySlot,
ArrayCastNodeFactory.create(
context, sourceSection, readArgument(sourceSection, arrayIndex))),
new IfNode(
context,
sourceSection,
BooleanCastNodeFactory.create(
context,
sourceSection,
new IsNilNode(
context,
sourceSection,
ReadLocalVariableNodeFactory.create(context, sourceSection, arraySlot))),
nil,
notNil));
}
protected RubyNode loadArray(SourceSection sourceSection) {
return ReadLocalVariableNodeFactory.create(context, sourceSection, arraySlotStack.peek());
}