Supporting FqNames with spaces/comments inside them for deprecated

compiler/frontend/src/org/jetbrains/jet/lang/psi/JetPsiUtil.java

@@ -17,12 +17,14 @@
 package org.jetbrains.jet.lang.psi;
 
 import com.google.common.base.Function;
+import com.google.common.collect.Lists;
 import com.intellij.lang.ASTNode;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.impl.CheckUtil;
 import com.intellij.psi.impl.source.codeStyle.CodeEditUtil;
 import com.intellij.psi.tree.IElementType;
 import com.intellij.psi.util.PsiTreeUtil;
+import com.intellij.util.containers.ContainerUtil;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.JetNodeTypes;
@@ -207,6 +209,23 @@ public class JetPsiUtil {
         return firstPart.child(name);
     }
 
+    /** @return <code>null</code> iff the tye has syntactic errors */
+    @Nullable
+    public static FqName toQualifiedName(@NotNull JetUserType userType) {
+        List<String> reversedNames = Lists.newArrayList();
+
+        JetUserType current = userType;
+        while (current != null) {
+            String name = current.getReferencedName();
+            if (name == null) return null;
+
+            reversedNames.add(name);
+            current = current.getQualifier();
+        }
+
+        return FqName.fromSegments(ContainerUtil.reverse(reversedNames));
+    }
+
     @Nullable
     public static Name getShortName(JetAnnotationEntry annotation) {
         JetTypeReference typeReference = annotation.getTypeReference();

compiler/frontend/src/org/jetbrains/jet/lang/resolve/name/FqName.java

@@ -17,6 +17,7 @@
 package org.jetbrains.jet.lang.resolve.name;
 
 import com.google.common.collect.Lists;
+import com.intellij.openapi.util.text.StringUtil;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -24,6 +25,12 @@ import java.util.List;
 
 public class FqName extends FqNameBase {
 
+    @NotNull
+    public static FqName fromSegments(@NotNull List<String> names) {
+        String fqName = StringUtil.join(names, ".");
+        return new FqName(fqName);
+    }
+
     public static final FqName ROOT = new FqName("");
 
     @NotNull
@@ -32,7 +39,6 @@ public class FqName extends FqNameBase {
     // cache
     private transient FqName parent;
 
-
     public FqName(@NotNull String fqName) {
         this.fqName = new FqNameUnsafe(fqName, this);