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A packaging of the IntelliJ Community Edition java-analysis-impl library. This is release number 1 of trunk branch 142.

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/*
 * Copyright 2003-2007 Dave Griffith, Bas Leijdekkers
 *
 * 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.siyeh.ig.assignment;

import com.intellij.psi.*;
import com.siyeh.InspectionGadgetsBundle;
import com.siyeh.ig.BaseInspection;
import com.siyeh.ig.BaseInspectionVisitor;
import org.jetbrains.annotations.NotNull;

public class NestedAssignmentInspection extends BaseInspection {

  @Override
  @NotNull
  public String getDisplayName() {
    return InspectionGadgetsBundle.message(
      "nested.assignment.display.name");
  }

  @Override
  @NotNull
  public String buildErrorString(Object... infos) {
    return InspectionGadgetsBundle.message(
      "nested.assignment.problem.descriptor");
  }

  @Override
  public BaseInspectionVisitor buildVisitor() {
    return new NestedAssignmentVisitor();
  }

  private static class NestedAssignmentVisitor extends BaseInspectionVisitor {

    @Override
    public void visitAssignmentExpression(
      @NotNull PsiAssignmentExpression expression) {
      super.visitAssignmentExpression(expression);
      final PsiElement parent = expression.getParent();
      if (parent == null) {
        return;
      }
      final PsiElement grandparent = parent.getParent();
      if (parent instanceof PsiExpressionStatement ||
          parent instanceof PsiLambdaExpression ||
          grandparent instanceof PsiExpressionListStatement) {
        return;
      }
      registerError(expression);
    }
  }
}