/*
 * Copyright 2000-2017 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jetbrains.uast

import com.intellij.psi.PsiElement

interface UResolvable {
  /**
   * Resolve the reference.
   * Note that the reference is *always* resolved to an unwrapped [PsiElement], never to a [UElement].
   *
   * @return the resolved element, or null if the reference couldn't be resolved.
   */
  fun resolve(): PsiElement?
}

fun UResolvable.resolveToUElement(): UElement? = resolve().toUElement()
