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Java: Merged ConfusingElseInspection and RemoveRedundantElseAction into RedundantElseInspection, made it an INFORMATION-level inspection (IDEA-162191)
This commit is contained in:
@@ -1,107 +0,0 @@
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/*
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* Copyright 2000-2009 JetBrains s.r.o.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.intellij.codeInsight.daemon.impl.quickfix;
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import com.intellij.codeInsight.daemon.QuickFixBundle;
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import com.intellij.codeInsight.intention.PsiElementBaseIntentionAction;
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import com.intellij.openapi.diagnostic.Logger;
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import com.intellij.openapi.editor.Editor;
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import com.intellij.openapi.project.Project;
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import com.intellij.psi.*;
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import com.intellij.psi.controlFlow.*;
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import com.intellij.psi.util.PsiTreeUtil;
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import com.intellij.util.BitUtil;
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import com.intellij.util.IncorrectOperationException;
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import org.jetbrains.annotations.NotNull;
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import org.jetbrains.annotations.Nullable;
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/**
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* @author ven
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*/
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public class RemoveRedundantElseAction extends PsiElementBaseIntentionAction {
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private static final Logger LOG = Logger.getInstance("#com.intellij.codeInsight.daemon.impl.quickfix.RemoveRedundantElseAction");
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@Override
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@NotNull
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public String getText() {
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return QuickFixBundle.message("remove.redundant.else.fix");
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}
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@Override
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@NotNull
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public String getFamilyName() {
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return QuickFixBundle.message("remove.redundant.else.fix");
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}
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@Override
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public boolean isAvailable(@NotNull Project project, Editor editor, @NotNull PsiElement element) {
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if (element instanceof PsiKeyword &&
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element.getParent() instanceof PsiIfStatement &&
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PsiKeyword.ELSE.equals(element.getText())) {
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PsiIfStatement ifStatement = (PsiIfStatement)element.getParent();
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if (ifStatement.getElseBranch() == null) return false;
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PsiStatement thenBranch = ifStatement.getThenBranch();
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if (thenBranch == null) return false;
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PsiElement block = PsiTreeUtil.getParentOfType(ifStatement, PsiCodeBlock.class);
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if (block != null) {
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while (cantCompleteNormally(thenBranch, block)) {
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thenBranch = getPrevThenBranch(thenBranch);
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if (thenBranch == null) return true;
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}
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return false;
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}
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}
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return false;
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}
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@Nullable
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private static PsiStatement getPrevThenBranch(@NotNull PsiElement thenBranch) {
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final PsiElement ifStatement = thenBranch.getParent();
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final PsiElement parent = ifStatement.getParent();
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if (parent instanceof PsiIfStatement && ((PsiIfStatement)parent).getElseBranch() == ifStatement) {
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return ((PsiIfStatement)parent).getThenBranch();
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}
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return null;
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}
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private static boolean cantCompleteNormally(@NotNull PsiStatement thenBranch, PsiElement block) {
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try {
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ControlFlow controlFlow = ControlFlowFactory.getInstance(thenBranch.getProject()).getControlFlow(block, LocalsOrMyInstanceFieldsControlFlowPolicy.getInstance());
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int startOffset = controlFlow.getStartOffset(thenBranch);
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int endOffset = controlFlow.getEndOffset(thenBranch);
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return startOffset != -1 && endOffset != -1 && !BitUtil.isSet(ControlFlowUtil.getCompletionReasons(controlFlow, startOffset, endOffset), ControlFlowUtil.NORMAL_COMPLETION_REASON);
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}
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catch (AnalysisCanceledException e) {
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return false;
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}
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}
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@Override
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public void invoke(@NotNull Project project, Editor editor, @NotNull PsiElement element) throws IncorrectOperationException {
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PsiIfStatement ifStatement = (PsiIfStatement)element.getParent();
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LOG.assertTrue(ifStatement != null && ifStatement.getElseBranch() != null);
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PsiStatement elseBranch = ifStatement.getElseBranch();
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if (elseBranch instanceof PsiBlockStatement) {
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PsiElement[] statements = ((PsiBlockStatement)elseBranch).getCodeBlock().getStatements();
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if (statements.length > 0) {
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ifStatement.getParent().addRangeAfter(statements[0], statements[statements.length-1], ifStatement);
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}
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} else {
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ifStatement.getParent().addAfter(elseBranch, ifStatement);
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}
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ifStatement.getElseBranch().delete();
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}
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}
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@@ -0,0 +1,10 @@
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// "Remove redundant 'else'" "true"
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class T {
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static void foo(boolean something) {
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if (something) {
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return;
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} // a
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System.out.println(); // b
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// c
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}
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}
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@@ -0,0 +1,13 @@
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// "Remove redundant 'else'" "true"
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class T {
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void three(boolean b) {
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switch (3) {
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case 2:
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if (foo()) {
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return;
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}
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return;
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case 3:
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}
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}
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}
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@@ -0,0 +1,12 @@
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// "Remove redundant 'else'" "true"
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class T {
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static void foo(boolean something) {
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if (something) {
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return;
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}
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else<caret> { // a
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System.out.println(); // b
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// c
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}
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}
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}
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@@ -0,0 +1,15 @@
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// "Remove redundant 'else'" "true"
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class T {
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void three(boolean b) {
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switch (3) {
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case 2:
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if (foo()) {
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return;
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}
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else<caret> {
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return;
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}
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case 3:
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}
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}
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}
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@@ -15,11 +15,18 @@
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*/
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package com.intellij.codeInsight.daemon.quickFix;
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import com.siyeh.ig.controlflow.RedundantElseInspection;
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/**
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* User: anna
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* Date: Aug 30, 2010
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*/
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public class RemoveRedundantElseActionTest extends LightQuickFixParameterizedTestCase {
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public class RemoveRedundantElseFixTest extends LightQuickFixParameterizedTestCase {
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@Override
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protected void setUp() throws Exception {
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super.setUp();
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enableInspectionTool(new RedundantElseInspection());
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}
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public void test() throws Exception { doAllTests(); }
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@@ -89,7 +89,7 @@ com.siyeh.ig.classmetrics.FieldCountInspection
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com.siyeh.ig.classmetrics.MethodCountInspection
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com.siyeh.ig.cloneable.CloneableImplementsCloneInspection
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com.siyeh.ig.controlflow.ConditionalExpressionInspection
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com.siyeh.ig.controlflow.ConfusingElseInspection
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com.siyeh.ig.controlflow.RedundantElseInspection
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com.siyeh.ig.controlflow.DuplicateConditionInspection
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com.siyeh.ig.controlflow.EnumSwitchStatementWhichMissesCasesInspection
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com.siyeh.ig.controlflow.ForLoopReplaceableByWhileInspection
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@@ -606,9 +606,9 @@
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key="conditional.expression.with.identical.branches.display.name" groupBundle="messages.InspectionsBundle"
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groupKey="group.names.control.flow.issues" enabledByDefault="false" level="WARNING"
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implementationClass="com.siyeh.ig.controlflow.ConditionalExpressionWithIdenticalBranchesInspection" cleanupTool="true"/>
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<localInspection groupPath="Java" language="JAVA" suppressId="ConfusingElseBranch" shortName="ConfusingElse" bundle="com.siyeh.InspectionGadgetsBundle"
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key="confusing.else.display.name" groupBundle="messages.InspectionsBundle" groupKey="group.names.control.flow.issues"
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enabledByDefault="false" level="WARNING" implementationClass="com.siyeh.ig.controlflow.ConfusingElseInspection"/>
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<localInspection groupPath="Java" language="JAVA" suppressId="ConfusingElseBranch" shortName="RedundantElse" bundle="com.siyeh.InspectionGadgetsBundle"
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key="redundant.else.display.name" groupBundle="messages.InspectionsBundle" groupKey="group.names.control.flow.issues"
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enabledByDefault="true" level="INFORMATION" implementationClass="com.siyeh.ig.controlflow.RedundantElseInspection"/>
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<localInspection groupPath="Java" language="JAVA" shortName="ConstantConditionalExpression" bundle="com.siyeh.InspectionGadgetsBundle"
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key="constant.conditional.expression.display.name" groupBundle="messages.InspectionsBundle"
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groupKey="group.names.control.flow.issues" enabledByDefault="true" level="WARNING"
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@@ -788,7 +788,7 @@ default.not.last.case.in.switch.display.name='default' not last case in 'switch'
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nested.synchronized.statement.display.name=Nested 'synchronized' statement
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constant.conditional.expression.display.name=Constant conditional expression
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unused.catch.parameter.display.name=Unused 'catch' parameter
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confusing.else.display.name=Confusing 'else' branch
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redundant.else.display.name=Redundant 'else'
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public.field.accessed.in.synchronized.context.display.name=Non-private field accessed in synchronized context
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string.replaceable.by.string.buffer.display.name=Non-constant String should be StringBuilder
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junit.test.class.naming.convention.display.name=JUnit test class naming convention
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@@ -878,7 +878,7 @@ octal.literal.problem.descriptor=Octal integer <code>#ref</code> #loc
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implicit.call.to.super.problem.descriptor=Implicit call to 'super()' #loc
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negated.if.else.problem.descriptor=<code>#ref</code> statement with negated condition #loc
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negated.conditional.problem.descriptor=Conditional expression with negated condition #loc
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confusing.else.problem.descriptor=<code>#ref</code> branch may be unwrapped, as the 'if' branch never completes #loc
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redundant.else.problem.descriptor=<code>#ref</code> branch may be unwrapped, as the 'if' branch never completes normally #loc
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switch.statement.with.confusing.declaration.problem.descriptor=Local variable <code>#ref</code> declared in one 'switch' branch and used in another #loc
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raw.use.of.parameterized.type.problem.descriptor=Raw use of parameterized class <code>#ref</code> #loc
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final.class.problem.descriptor=Class declared <code>#ref</code> #loc
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@@ -1121,7 +1121,7 @@ boolean.method.name.must.start.with.question.table.column.name=Boolean method na
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conditional.expression.with.identical.branches.collapse.quickfix=Collapse conditional expression
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conditional.expression.with.identical.branches.push.inside.quickfix=Push conditional inside expression
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conditional.expression.with.identical.branches.collapse.quickfix.family=Conditional expression can be simplified
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confusing.else.unwrap.quickfix=Remove redundant 'else'
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redundant.else.unwrap.quickfix=Remove redundant 'else'
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constant.conditional.expression.problem.descriptor=<code>#ref</code> can be simplified to ''{0}'' #loc
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constant.conditional.expression.simplify.quickfix=Simplify
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enum.switch.statement.which.misses.cases.problem.descriptor=<code>#ref</code> statement on enumerated type ''{0}'' misses cases #loc
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@@ -16,26 +16,21 @@
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package com.siyeh.ig.controlflow;
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import com.intellij.codeInspection.ProblemDescriptor;
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import com.intellij.codeInspection.ui.SingleCheckboxOptionsPanel;
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import com.intellij.openapi.project.Project;
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import com.intellij.psi.*;
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import com.intellij.psi.util.PsiTreeUtil;
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import com.intellij.util.IncorrectOperationException;
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import com.siyeh.InspectionGadgetsBundle;
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import com.siyeh.ig.BaseInspection;
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import com.siyeh.ig.BaseInspectionVisitor;
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import com.siyeh.ig.InspectionGadgetsFix;
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import com.siyeh.ig.psiutils.ControlFlowUtils;
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import org.intellij.lang.annotations.Pattern;
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import org.jetbrains.annotations.NotNull;
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import org.jetbrains.annotations.Nullable;
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import javax.swing.*;
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public class ConfusingElseInspection extends BaseInspection {
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@SuppressWarnings({"PublicField"})
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public boolean reportWhenNoStatementFollow = false;
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public class RedundantElseInspection extends BaseInspection {
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@Pattern(VALID_ID_PATTERN)
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@Override
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@NotNull
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public String getID() {
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@@ -45,37 +40,32 @@ public class ConfusingElseInspection extends BaseInspection {
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@Override
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@NotNull
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public String getDisplayName() {
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return InspectionGadgetsBundle.message("confusing.else.display.name");
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return InspectionGadgetsBundle.message("redundant.else.display.name");
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}
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@Override
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@NotNull
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protected String buildErrorString(Object... infos) {
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return InspectionGadgetsBundle.message("confusing.else.problem.descriptor");
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}
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@Override
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public JComponent createOptionsPanel() {
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return new SingleCheckboxOptionsPanel(InspectionGadgetsBundle.message("confusing.else.option"), this, "reportWhenNoStatementFollow");
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return InspectionGadgetsBundle.message("redundant.else.problem.descriptor");
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}
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@Override
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public BaseInspectionVisitor buildVisitor() {
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return new ConfusingElseVisitor();
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return new RedundantElseVisitor();
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}
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@Override
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@Nullable
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protected InspectionGadgetsFix buildFix(Object... infos) {
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return new ConfusingElseFix();
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return new RemoveRedundantElseFix();
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}
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private static class ConfusingElseFix extends InspectionGadgetsFix {
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private static class RemoveRedundantElseFix extends InspectionGadgetsFix {
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@Override
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@NotNull
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public String getFamilyName() {
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return InspectionGadgetsBundle.message("confusing.else.unwrap.quickfix");
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return InspectionGadgetsBundle.message("redundant.else.unwrap.quickfix");
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}
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@Override
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@@ -110,7 +100,7 @@ public class ConfusingElseInspection extends BaseInspection {
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}
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}
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private class ConfusingElseVisitor extends BaseInspectionVisitor {
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private static class RedundantElseVisitor extends BaseInspectionVisitor {
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@Override
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public void visitIfStatement(@NotNull PsiIfStatement statement) {
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@@ -126,17 +116,6 @@ public class ConfusingElseInspection extends BaseInspection {
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if (ControlFlowUtils.statementMayCompleteNormally(thenBranch)) {
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return;
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}
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if (!reportWhenNoStatementFollow) {
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final PsiStatement nextStatement = getNextStatement(statement);
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if (nextStatement == null) {
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return;
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}
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if (!ControlFlowUtils.statementMayCompleteNormally(elseBranch)) {
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return;
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// protecting against an edge case where both branches return
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// and are followed by a case label
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}
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}
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final PsiElement elseToken = statement.getElseElement();
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if (elseToken == null) {
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return;
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@@ -147,7 +126,7 @@ public class ConfusingElseInspection extends BaseInspection {
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registerError(elseToken);
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}
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private boolean parentCompletesNormally(PsiElement element) {
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private static boolean parentCompletesNormally(PsiElement element) {
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PsiElement parent = element.getParent();
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while (parent instanceof PsiIfStatement) {
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final PsiIfStatement ifStatement = (PsiIfStatement)parent;
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@@ -164,21 +143,5 @@ public class ConfusingElseInspection extends BaseInspection {
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}
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return !(parent instanceof PsiCodeBlock);
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}
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@Nullable
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private PsiStatement getNextStatement(PsiIfStatement statement) {
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while (true) {
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final PsiElement parent = statement.getParent();
|
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if (parent instanceof PsiIfStatement) {
|
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final PsiIfStatement parentIfStatement = (PsiIfStatement)parent;
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final PsiStatement elseBranch = parentIfStatement.getElseBranch();
|
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if (elseBranch == statement) {
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statement = parentIfStatement;
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continue;
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}
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||||
}
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return PsiTreeUtil.getNextSiblingOfType(statement, PsiStatement.class);
|
||||
}
|
||||
}
|
||||
}
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||||
}
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||||
@@ -1,16 +0,0 @@
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<html>
|
||||
<body>
|
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Reports confusing <b>else</b> branches. <b>else</b> branches are confusing
|
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when the <b>if</b> statement is followed by other statements and the <b>if</b> branch
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cannot complete normally, for example because it ends with a <b>return</b> statement. In these
|
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cases the statements in the <b>else</b> can be moved after the <b>if</b> statement and
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the <b>else</b> branch removed.
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<!-- tooltip end -->
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||||
<p>
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||||
Use the checkbox below to also report <b>else</b> branches of <b>if</b> statements whose
|
||||
<b>if</b> branch cannot complete normally and which are not followed by more statements,
|
||||
similar to the Redundant Else intention.
|
||||
<p>
|
||||
|
||||
</body>
|
||||
</html>
|
||||
@@ -0,0 +1,11 @@
|
||||
<html>
|
||||
<body>
|
||||
Reports redundant <b>else</b> keywords in <b>if</b>—<b>else</b> statements and statement chains.
|
||||
An <b>else</b> keyword is redundant when all previous <b>if</b> branches in the chain don't complete normally
|
||||
because they end with <b>return</b>, <b>throw</b>, <b>break</b>, or <b>continue</b> statement.
|
||||
<p>
|
||||
In these cases the statements from the <b>else</b> branch can be placed after the <b>if</b> statement and
|
||||
the <b>else</b> keyword can be removed.
|
||||
<!-- tooltip end -->
|
||||
</body>
|
||||
</html>
|
||||
@@ -1,63 +0,0 @@
|
||||
package com.siyeh.igtest.controlflow.confusing_else;
|
||||
|
||||
public class ConfusingElse {
|
||||
|
||||
public static void main(String[] args) {
|
||||
if (foo()) {
|
||||
return;
|
||||
} <warning descr="'else' branch may be unwrapped, as the 'if' branch never completes">else</warning> {
|
||||
System.out.println("ConfusingElseInspection.main");
|
||||
}
|
||||
bar();
|
||||
}
|
||||
|
||||
private static void bar() {
|
||||
}
|
||||
|
||||
private static boolean foo() {
|
||||
return true;
|
||||
}
|
||||
|
||||
void two(boolean b) {
|
||||
if (foo()) {
|
||||
System.out.println(0);
|
||||
} else if (b) {
|
||||
return;
|
||||
} else {
|
||||
System.out.println(1);
|
||||
}
|
||||
bar();
|
||||
}
|
||||
|
||||
void three(boolean b) {
|
||||
switch (3) {
|
||||
case 2:
|
||||
if (foo()) {
|
||||
return;
|
||||
} else {
|
||||
return;
|
||||
}
|
||||
case 3:
|
||||
}
|
||||
}
|
||||
|
||||
public int foo(int o) {
|
||||
if (o == 1) {
|
||||
o = 2;
|
||||
} else if (o == 2) {
|
||||
return 1;
|
||||
} else {
|
||||
o = 4;
|
||||
}
|
||||
return o;
|
||||
}
|
||||
|
||||
void elseIf(int i) {
|
||||
if (i == 1) {
|
||||
return;
|
||||
} <warning descr="'else' branch may be unwrapped, as the 'if' branch never completes">else</warning> if (i == 3) {
|
||||
System.out.println("i = " + i);
|
||||
}
|
||||
System.out.println();
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,85 @@
|
||||
package com.siyeh.igtest.controlflow.confusing_else;
|
||||
|
||||
public class RedundantElse {
|
||||
|
||||
public static void main(String[] args) {
|
||||
if (foo()) {
|
||||
return;
|
||||
} <warning descr="'else' branch may be unwrapped, as the 'if' branch never completes normally">else</warning> {
|
||||
System.out.println("RedundantElseInspection.main");
|
||||
}
|
||||
bar();
|
||||
}
|
||||
|
||||
private static void bar() {
|
||||
}
|
||||
|
||||
private static boolean foo() {
|
||||
return true;
|
||||
}
|
||||
|
||||
void two(boolean b) {
|
||||
if (foo()) {
|
||||
System.out.println(0);
|
||||
} else if (b) {
|
||||
return;
|
||||
} else {
|
||||
System.out.println(1);
|
||||
}
|
||||
bar();
|
||||
}
|
||||
|
||||
void three(boolean b) {
|
||||
switch (3) {
|
||||
case 2:
|
||||
if (foo()) {
|
||||
return;
|
||||
} <warning descr="'else' branch may be unwrapped, as the 'if' branch never completes normally">else</warning> {
|
||||
return;
|
||||
}
|
||||
case 3:
|
||||
}
|
||||
}
|
||||
|
||||
public int foo(int o) {
|
||||
if (o == 1) {
|
||||
o = 2;
|
||||
} else if (o == 2) {
|
||||
return 1;
|
||||
} else {
|
||||
o = 4;
|
||||
}
|
||||
return o;
|
||||
}
|
||||
|
||||
void elseIf(int i) {
|
||||
if (i == 1) {
|
||||
return;
|
||||
} <warning descr="'else' branch may be unwrapped, as the 'if' branch never completes normally">else</warning> if (i == 3) {
|
||||
System.out.println("i = " + i);
|
||||
}
|
||||
System.out.println();
|
||||
}
|
||||
|
||||
void elseIfChain(int i) {
|
||||
while (true) {
|
||||
if (i == 0) {
|
||||
System.exit(i);
|
||||
}
|
||||
<warning descr="'else' branch may be unwrapped, as the 'if' branch never completes normally">else</warning> if (i == 1) {
|
||||
throw new RuntimeException();
|
||||
}
|
||||
<warning descr="'else' branch may be unwrapped, as the 'if' branch never completes normally">else</warning> if (i == 2) {
|
||||
return;
|
||||
}
|
||||
<warning descr="'else' branch may be unwrapped, as the 'if' branch never completes normally">else</warning> if (i == 3) {
|
||||
break;
|
||||
}
|
||||
<warning descr="'else' branch may be unwrapped, as the 'if' branch never completes normally">else</warning> if (i == 4) {
|
||||
continue;
|
||||
} <warning descr="'else' branch may be unwrapped, as the 'if' branch never completes normally">else</warning> {
|
||||
System.out.println(i);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -22,15 +22,15 @@ import org.jetbrains.annotations.Nullable;
|
||||
/**
|
||||
* @author Bas Leijdekkers
|
||||
*/
|
||||
public class ConfusingElseInspectionTest extends LightInspectionTestCase {
|
||||
public class RedundantElseInspectionTest extends LightInspectionTestCase {
|
||||
|
||||
public void testConfusingElse() {
|
||||
public void testRedundantElse() {
|
||||
doTest();
|
||||
}
|
||||
|
||||
@Nullable
|
||||
@Override
|
||||
protected InspectionProfileEntry getInspection() {
|
||||
return new ConfusingElseInspection();
|
||||
return new RedundantElseInspection();
|
||||
}
|
||||
}
|
||||
@@ -1,8 +0,0 @@
|
||||
public class X {
|
||||
void f(int i) {
|
||||
if (i==0) {
|
||||
return;
|
||||
}
|
||||
int j = 0;
|
||||
}
|
||||
}
|
||||
@@ -1,10 +0,0 @@
|
||||
public class X {
|
||||
void f(int i) {
|
||||
if (i==0) {
|
||||
return;
|
||||
}
|
||||
<spot>else</spot> {
|
||||
int j = 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -1,7 +0,0 @@
|
||||
<html>
|
||||
<body>
|
||||
This intention detaches <b>else</b> clause from the <b>if</b> statement,
|
||||
if corresponding <b>then</b> clause never completes normally.
|
||||
|
||||
</body>
|
||||
</html>
|
||||
@@ -149,7 +149,6 @@ negation.broader.scope.text=Change to ''!({0})''
|
||||
|
||||
optimize.imports.fix=Optimize imports
|
||||
remove.qualifier.fix=Remove qualifier
|
||||
remove.redundant.else.fix=Remove redundant 'else'
|
||||
remove.unused.parameter.family=Remove unused parameter
|
||||
remove.unused.parameter.text=Remove parameter ''{0}''
|
||||
remove.unused.variable.family=Remove unused variable
|
||||
|
||||
@@ -912,10 +912,6 @@
|
||||
<className>com.intellij.codeInsight.intention.impl.ExtractIfConditionAction</className>
|
||||
<category>Java/Control Flow</category>
|
||||
</intentionAction>
|
||||
<intentionAction>
|
||||
<className>com.intellij.codeInsight.daemon.impl.quickfix.RemoveRedundantElseAction</className>
|
||||
<category>Java/Control Flow</category>
|
||||
</intentionAction>
|
||||
<intentionAction>
|
||||
<className>com.intellij.codeInsight.intention.impl.AddNotNullAnnotationIntention</className>
|
||||
<category>Java/Annotations</category>
|
||||
|
||||
Reference in New Issue
Block a user