IDEA-117543 (Bad quickfix for "implicit numeric conversion")

plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/numeric/ImplicitNumericConversionInspection.java

@@ -123,6 +123,18 @@ public class ImplicitNumericConversionInspection extends BaseInspection {
         PsiReplacementUtil.replaceExpression(expression, convertedExpression);
       }
       else {
+        final PsiElement parent = expression.getParent();
+        if (parent instanceof PsiAssignmentExpression) {
+          final PsiAssignmentExpression assignmentExpression = (PsiAssignmentExpression)parent;
+          final PsiJavaToken sign = assignmentExpression.getOperationSign();
+          if (!JavaTokenType.EQ.equals(sign.getTokenType())) {
+            final String lhsText = assignmentExpression.getLExpression().getText();
+            final String newExpressionText =
+              lhsText + "=(" + expectedType.getCanonicalText() + ")(" + lhsText + sign.getText().charAt(0) + expression.getText() + ')';
+            PsiReplacementUtil.replaceExpression(assignmentExpression, newExpressionText);
+            return;
+          }
+        }
         final String castExpression;
         if (ParenthesesUtils.getPrecedence(expression) <= ParenthesesUtils.TYPE_CAST_PRECEDENCE) {
           castExpression = '(' + expectedType.getCanonicalText() + ')' + expression.getText();

plugins/InspectionGadgets/test/com/siyeh/igfixes/numeric/implicit_numeric_conversion/OperatorAssignment.after.java

@@ -0,0 +1,10 @@
+class OperatorAssignment {
+    public static void main(String[] args) {
+      int a = 10;
+      double b = 0.5;
+
+        a = (int) (a * b);
+
+      System.out.println(a);
+    }
+}

plugins/InspectionGadgets/test/com/siyeh/igfixes/numeric/implicit_numeric_conversion/OperatorAssignment.java

@@ -0,0 +1,10 @@
+class OperatorAssignment {
+    public static void main(String[] args) {
+      int a = 10;
+      double b = 0.5;
+
+      a *= <caret>b;
+
+      System.out.println(a);
+    }
+}

plugins/InspectionGadgets/testsrc/com/siyeh/ig/fixes/numeric/ImplicitNumericConversionFixTest.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2000-2015 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.siyeh.ig.fixes.numeric;
+
+import com.siyeh.InspectionGadgetsBundle;
+import com.siyeh.ig.IGQuickFixesTestCase;
+import com.siyeh.ig.numeric.ImplicitNumericConversionInspection;
+
+/**
+ * @author Bas Leijdekkers
+ */
+public class ImplicitNumericConversionFixTest extends IGQuickFixesTestCase {
+
+  public void testOperatorAssignment() {
+    doTest();
+  }
+
+  @Override
+  protected void setUp() throws Exception {
+    super.setUp();
+    myFixture.enableInspections(new ImplicitNumericConversionInspection());
+    myDefaultHint = InspectionGadgetsBundle.message("implicit.numeric.conversion.make.explicit.quickfix");
+  }
+
+  @Override
+  protected String getRelativePath() {
+    return "numeric/implicit_numeric_conversion";
+  }
+}