private static boolean checkFoldableIfExpressionWithAsymmetricReturns(
JetIfExpression ifExpression) {
if (getFoldableBranchedReturn(ifExpression.getThen()) == null
|| ifExpression.getElse() != null) {
return false;
}
PsiElement nextElement = JetPsiUtil.skipTrailingWhitespacesAndComments(ifExpression);
return (nextElement instanceof JetExpression)
&& getFoldableBranchedReturn((JetExpression) nextElement) != null;
}
public static void foldIfExpressionWithAsymmetricReturns(JetIfExpression ifExpression) {
Project project = ifExpression.getProject();
JetExpression condition = ifExpression.getCondition();
JetExpression thenRoot = ifExpression.getThen();
JetExpression elseRoot =
(JetExpression) JetPsiUtil.skipTrailingWhitespacesAndComments(ifExpression);
assertNotNull(condition);
assertNotNull(thenRoot);
assertNotNull(elseRoot);
//noinspection ConstantConditions
JetIfExpression newIfExpression =
JetPsiFactory.createIf(project, condition, thenRoot, elseRoot);
JetReturnExpression newReturnExpression = JetPsiFactory.createReturn(project, newIfExpression);
newIfExpression = (JetIfExpression) newReturnExpression.getReturnedExpression();
assertNotNull(newIfExpression);
//noinspection ConstantConditions
JetReturnExpression thenReturn = getFoldableBranchedReturn(newIfExpression.getThen());
JetReturnExpression elseReturn = getFoldableBranchedReturn(newIfExpression.getElse());
assertNotNull(thenReturn);
assertNotNull(elseReturn);
JetExpression thenExpr = thenReturn.getReturnedExpression();
JetExpression elseExpr = elseReturn.getReturnedExpression();
assertNotNull(thenExpr);
assertNotNull(elseExpr);
//noinspection ConstantConditions
thenReturn.replace(thenExpr);
//noinspection ConstantConditions
elseReturn.replace(elseExpr);
elseRoot.delete();
ifExpression.replace(newReturnExpression);
}