@NotNull
private JsExpression translateElvis(JetBinaryExpression expression) {
JsExpression leftExpression = translateLeftExpression(context(), expression);
JetExpression rightJetExpression = expression.getRight();
assert rightJetExpression != null : "Binary expression should have a right expression";
JsNode rightNode = Translation.translateExpression(rightJetExpression, context());
if (rightNode instanceof JsExpression) {
return TranslationUtils.notNullConditional(
leftExpression, (JsExpression) rightNode, context());
}
TemporaryVariable result = context().declareTemporary(null);
AssignToExpressionMutator saveResultToTemporaryMutator =
new AssignToExpressionMutator(result.reference());
context()
.addStatementToCurrentBlock(
LastExpressionMutator.mutateLastExpression(
leftExpression, saveResultToTemporaryMutator));
JsExpression testExpression = TranslationUtils.isNullCheck(result.reference());
JsStatement thenStatement = convertToStatement(rightNode);
JsIf ifStatement = new JsIf(testExpression, thenStatement);
context().addStatementToCurrentBlock(ifStatement);
return result.reference();
}
@NotNull
@Override
public JsExpression translateAsSet(@NotNull JsExpression setTo) {
return translateAsSet(arrayExpression.reference(), toExpressionList(indexExpressions), setTo);
}
@NotNull
@Override
public JsExpression translateAsGet() {
return translateAsGet(arrayExpression.reference(), toExpressionList(indexExpressions));
}