private static GrForStatement updateReturnStatements(GrForStatement forStatement) {
GrStatement body = forStatement.getBody();
assert body != null;
final Set<String> usedLabels = ContainerUtil.newHashSet();
final Ref<Boolean> needLabel = Ref.create(false);
body.accept(
new GroovyRecursiveElementVisitor() {
private int myLoops = 0;
@Override
public void visitReturnStatement(GrReturnStatement returnStatement) {
if (returnStatement.getReturnValue() != null) return;
if (myLoops > 0) needLabel.set(true);
}
@Override
public void visitLabeledStatement(GrLabeledStatement labeledStatement) {
super.visitLabeledStatement(labeledStatement);
usedLabels.add(labeledStatement.getName());
}
@Override
public void visitForStatement(GrForStatement forStatement) {
myLoops++;
super.visitForStatement(forStatement);
myLoops--;
}
@Override
public void visitWhileStatement(GrWhileStatement whileStatement) {
myLoops++;
super.visitWhileStatement(whileStatement);
myLoops--;
}
@Override
public void visitClosure(GrClosableBlock closure) {
// don't go into closures
}
@Override
public void visitAnonymousClassDefinition(
GrAnonymousClassDefinition anonymousClassDefinition) {
// don't go into anonymous
}
});
GroovyPsiElementFactory factory =
GroovyPsiElementFactory.getInstance(forStatement.getProject());
final String continueText;
if (needLabel.get()) {
int i = 0;
String label = OUTER;
while (usedLabels.contains(label)) {
label = OUTER + i;
i++;
}
continueText = "continue " + label;
GrLabeledStatement labeled =
(GrLabeledStatement) factory.createStatementFromText(label + ": while (true){}");
labeled.getStatement().replaceWithStatement(forStatement);
labeled = forStatement.replaceWithStatement(labeled);
forStatement = (GrForStatement) labeled.getStatement();
body = forStatement.getBody();
assert body != null;
} else {
continueText = "continue";
}
final GrStatement continueStatement = factory.createStatementFromText(continueText);
body.accept(
new GroovyRecursiveElementVisitor() {
@Override
public void visitReturnStatement(GrReturnStatement returnStatement) {
if (returnStatement.getReturnValue() == null) {
returnStatement.replaceWithStatement(continueStatement);
}
}
@Override
public void visitClosure(GrClosableBlock closure) {
// don't go into closures
}
@Override
public void visitAnonymousClassDefinition(
GrAnonymousClassDefinition anonymousClassDefinition) {
// don't go into anonymous
}
});
return forStatement;
}
