/*
 * 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 com.intellij.codeInsight.controlflow.impl;

import com.intellij.codeInsight.controlflow.ControlFlowBuilder;
import com.intellij.psi.PsiElement;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.concurrent.atomic.AtomicInteger;

public class DetachedInstructionImpl extends InstructionBaseImpl {

  private final AtomicInteger myNum = new AtomicInteger(-1);

  public DetachedInstructionImpl(@Nullable PsiElement element) {
    super(element);
  }

  @Override
  public int num() {
    return myNum.get();
  }

  public final void addToInstructions(@NotNull ControlFlowBuilder builder) {
    builder.instructions.add(this);
    updateNum(builder.instructionCount++);
  }

  public final void addNode(@NotNull ControlFlowBuilder builder) {
    updateNum(builder.instructionCount++);
    builder.addNodeAndCheckPending(this);
  }

  public void updateNum(int newNum) {
    assert myNum.get() == -1;
    myNum.set(newNum);
  }
}

@@ -710,16 +710,84 @@
 uilder;%0A
+import com.intellij.codeInsight.controlflow.TransparentInstruction;%0A
 import c
@@ -814,16 +814,16 @@
 lement;%0A
-
 import o
@@ -1306,24 +1306,78 @@
  builder) %7B%0A
+    assert !(this instanceof TransparentInstruction);%0A
     builder.
@@ -1471,16 +1471,27 @@
 void add
+Transparent
 Node(@No
@@ -1522,24 +1522,297 @@
  builder) %7B%0A
+    assert this instanceof TransparentInstruction;%0A    updateNum(builder.transparentInstructionCount++);%0A    builder.addNodeAndCheckPending(this);%0A  %7D%0A%0A  public final void addNode(@NotNull ControlFlowBuilder builder) %7B%0A    assert !(this instanceof TransparentInstruction);%0A
     updateNu

fix unreachable false positive WEB-33988 WEB-36833 WEB-31327