8302202: Incorrect desugaring of null-allowed nested patterns
Reviewed-by: vromero
This commit is contained in:
parent
c4ffe4bf63
commit
dc55a7fc87
src/jdk.compiler/share/classes/com/sun/tools/javac/comp
test/langtools/tools/javac/patterns
@ -232,8 +232,8 @@ public class TransPatterns extends TreeTranslator {
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}
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Type principalType = types.erasure(TreeInfo.primaryPatternType((pattern)));
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JCExpression resultExpression= (JCExpression) this.<JCTree>translate(pattern);
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if (!tree.allowNull || !types.isSubtype(currentValue.type, principalType)) {
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JCExpression resultExpression = (JCExpression) this.<JCTree>translate(pattern);
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if (!tree.allowNull && !principalType.isPrimitive()) {
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resultExpression =
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makeBinary(Tag.AND,
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makeTypeTest(make.Ident(currentValue), make.Type(principalType)),
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@ -330,7 +330,8 @@ public class TransPatterns extends TreeTranslator {
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allowNull = false;
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} else {
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nestedBinding = (JCBindingPattern) nestedPattern;
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allowNull = true;
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allowNull = types.isSubtype(componentType,
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types.boxedTypeOrType(types.erasure(nestedBinding.type)));
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}
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JCMethodInvocation componentAccessor =
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make.App(make.Select(convert(make.Ident(recordBinding), recordBinding.type), //TODO - cast needed????
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@ -710,6 +711,7 @@ public class TransPatterns extends TreeTranslator {
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"commonNestedExpression: " + commonNestedExpression +
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"commonNestedBinding: " + commonNestedBinding);
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ListBuffer<JCCase> nestedCases = new ListBuffer<>();
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JCExpression lastGuard = null;
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for(List<JCCase> accList = accummulator.toList(); accList.nonEmpty(); accList = accList.tail) {
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var accummulated = accList.head;
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@ -734,8 +736,6 @@ public class TransPatterns extends TreeTranslator {
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JCBindingPattern binding = (JCBindingPattern) instanceofCheck.pattern;
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hasUnconditional =
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instanceofCheck.allowNull &&
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types.isSubtype(commonNestedExpression.type,
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types.boxedTypeOrType(types.erasure(binding.type))) &&
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accList.tail.isEmpty();
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List<JCCaseLabel> newLabel;
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if (hasUnconditional) {
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@ -746,13 +746,16 @@ public class TransPatterns extends TreeTranslator {
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}
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appendBreakIfNeeded(currentSwitch, accummulated);
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nestedCases.add(make.Case(CaseKind.STATEMENT, newLabel, accummulated.stats, null));
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lastGuard = newGuard;
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}
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if (!hasUnconditional) {
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if (lastGuard != null || !hasUnconditional) {
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JCContinue continueSwitch = make.Continue(null);
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continueSwitch.target = currentSwitch;
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nestedCases.add(make.Case(CaseKind.STATEMENT,
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List.of(make.ConstantCaseLabel(makeNull()),
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make.DefaultCaseLabel()),
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hasUnconditional
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? List.of(make.DefaultCaseLabel())
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: List.of(make.ConstantCaseLabel(makeNull()),
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make.DefaultCaseLabel()),
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List.of(continueSwitch),
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null));
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}
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@ -774,9 +777,11 @@ public class TransPatterns extends TreeTranslator {
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VarSymbol commonBinding = null;
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JCExpression commonNestedExpression = null;
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VarSymbol commonNestedBinding = null;
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boolean previousNullable = false;
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for (List<JCCase> c = inputCases; c.nonEmpty(); c = c.tail) {
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VarSymbol currentBinding = null;
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boolean currentNullable = false;
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JCExpression currentNestedExpression = null;
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VarSymbol currentNestedBinding = null;
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@ -786,11 +791,13 @@ public class TransPatterns extends TreeTranslator {
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binOp.lhs instanceof JCInstanceOf instanceofCheck &&
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instanceofCheck.pattern instanceof JCBindingPattern binding) {
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currentBinding = ((JCBindingPattern) patternLabel.pat).var.sym;
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currentNullable = instanceofCheck.allowNull;
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currentNestedExpression = instanceofCheck.expr;
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currentNestedBinding = binding.var.sym;
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} else if (patternLabel.guard instanceof JCInstanceOf instanceofCheck &&
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instanceofCheck.pattern instanceof JCBindingPattern binding) {
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currentBinding = ((JCBindingPattern) patternLabel.pat).var.sym;
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currentNullable = instanceofCheck.allowNull;
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currentNestedExpression = instanceofCheck.expr;
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currentNestedBinding = binding.var.sym;
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}
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@ -806,6 +813,7 @@ public class TransPatterns extends TreeTranslator {
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}
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} else if (currentBinding != null &&
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commonBinding.type.tsym == currentBinding.type.tsym &&
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!previousNullable &&
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new TreeDiffer(List.of(commonBinding), List.of(currentBinding))
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.scan(commonNestedExpression, currentNestedExpression)) {
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accummulator.add(c.head);
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@ -820,6 +828,7 @@ public class TransPatterns extends TreeTranslator {
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commonNestedExpression = currentNestedExpression;
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commonNestedBinding = currentNestedBinding;
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}
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previousNullable = currentNullable;
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}
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resolveAccummulator.resolve(commonBinding, commonNestedExpression, commonNestedBinding);
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return result.toList();
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@ -0,0 +1,163 @@
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/*
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* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8302202
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* @summary Testing record patterns with null components
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* @enablePreview
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* @compile NullsInDeconstructionPatterns2.java
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* @run main NullsInDeconstructionPatterns2
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*/
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import java.util.Objects;
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import java.util.function.Function;
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public class NullsInDeconstructionPatterns2 {
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public static void main(String[] args) {
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new NullsInDeconstructionPatterns2().run();
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}
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private void run() {
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run1(this::test1a);
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run1(this::test1b);
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run2(this::test2a);
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run2(this::test2b);
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run3(this::test3a);
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run3(this::test3b);
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run4();
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}
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private void run1(Function<Object, String> method) {
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assertEquals("R1(null)", method.apply(new R1(null)));
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assertEquals("R1(!null)", method.apply(new R1("")));
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}
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private void run2(Function<Object, String> method) {
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assertEquals("R2(null, null)", method.apply(new R2(null, null)));
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assertEquals("R2(!null, null)", method.apply(new R2("", null)));
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assertEquals("R2(null, !null)", method.apply(new R2(null, "")));
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assertEquals("R2(!null, !null)", method.apply(new R2("", "")));
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}
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private void run3(Function<Object, String> method) {
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assertEquals("R3(null, null, null)", method.apply(new R3(null, null, null)));
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assertEquals("R3(!null, null, null)", method.apply(new R3("", null, null)));
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assertEquals("R3(null, !null, null)", method.apply(new R3(null, "", null)));
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assertEquals("R3(!null, !null, null)", method.apply(new R3("", "", null)));
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assertEquals("R3(null, null, !null)", method.apply(new R3(null, null, "")));
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assertEquals("R3(!null, null, !null)", method.apply(new R3("", null, "")));
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assertEquals("R3(null, !null, !null)", method.apply(new R3(null, "", "")));
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assertEquals("R3(!null, !null, !null)", method.apply(new R3("", "", "")));
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}
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private void run4() {
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assertEquals("integer", test4(new R1(0)));
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assertEquals("empty", test4(new R1("")));
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assertEquals("default", test4(new R1("a")));
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}
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private String test1a(Object i) {
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return switch (i) {
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case R1(Object o) when o == null -> "R1(null)";
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case R1(Object o) when o != null -> "R1(!null)";
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default -> "default";
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};
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}
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private String test1b(Object i) {
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return switch (i) {
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case R1(Object o) when o == null -> "R1(null)";
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case R1(Object o) -> "R1(!null)";
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default -> "default";
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};
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}
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private String test2a(Object i) {
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return switch (i) {
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case R2(Object o1, Object o2) when o1 == null && o2 == null -> "R2(null, null)";
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case R2(Object o1, Object o2) when o1 != null && o2 == null -> "R2(!null, null)";
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case R2(Object o1, Object o2) when o1 == null && o2 != null -> "R2(null, !null)";
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case R2(Object o1, Object o2) when o1 != null && o2 != null -> "R2(!null, !null)";
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default -> "default";
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};
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}
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private String test2b(Object i) {
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return switch (i) {
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case R2(Object o1, Object o2) when o1 == null && o2 == null -> "R2(null, null)";
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case R2(Object o1, Object o2) when o1 != null && o2 == null -> "R2(!null, null)";
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case R2(Object o1, Object o2) when o1 == null && o2 != null -> "R2(null, !null)";
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case R2(Object o1, Object o2) -> "R2(!null, !null)";
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default -> "default";
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};
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}
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private String test3a(Object i) {
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return switch (i) {
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case R3(Object o1, Object o2, Object o3) when o1 == null && o2 == null && o3 == null -> "R3(null, null, null)";
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case R3(Object o1, Object o2, Object o3) when o1 != null && o2 == null && o3 == null -> "R3(!null, null, null)";
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case R3(Object o1, Object o2, Object o3) when o1 == null && o2 != null && o3 == null -> "R3(null, !null, null)";
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case R3(Object o1, Object o2, Object o3) when o1 != null && o2 != null && o3 == null -> "R3(!null, !null, null)";
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case R3(Object o1, Object o2, Object o3) when o1 == null && o2 == null && o3 != null -> "R3(null, null, !null)";
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case R3(Object o1, Object o2, Object o3) when o1 != null && o2 == null && o3 != null -> "R3(!null, null, !null)";
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case R3(Object o1, Object o2, Object o3) when o1 == null && o2 != null && o3 != null -> "R3(null, !null, !null)";
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case R3(Object o1, Object o2, Object o3) when o1 != null && o2 != null && o3 != null -> "R3(!null, !null, !null)";
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default -> "default";
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};
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}
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private String test3b(Object i) {
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return switch (i) {
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case R3(Object o1, Object o2, Object o3) when o1 == null && o2 == null && o3 == null -> "R3(null, null, null)";
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case R3(Object o1, Object o2, Object o3) when o1 != null && o2 == null && o3 == null -> "R3(!null, null, null)";
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case R3(Object o1, Object o2, Object o3) when o1 == null && o2 != null && o3 == null -> "R3(null, !null, null)";
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case R3(Object o1, Object o2, Object o3) when o1 != null && o2 != null && o3 == null -> "R3(!null, !null, null)";
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case R3(Object o1, Object o2, Object o3) when o1 == null && o2 == null && o3 != null -> "R3(null, null, !null)";
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case R3(Object o1, Object o2, Object o3) when o1 != null && o2 == null && o3 != null -> "R3(!null, null, !null)";
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case R3(Object o1, Object o2, Object o3) when o1 == null && o2 != null && o3 != null -> "R3(null, !null, !null)";
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case R3(Object o1, Object o2, Object o3) -> "R3(!null, !null, !null)";
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default -> "default";
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};
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}
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private String test4(Object i) {
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return switch (i) {
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case R1(Integer o) -> "integer";
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case R1(Object o) when o.toString().isEmpty() -> "empty";
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default -> "default";
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};
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}
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private static void assertEquals(String expected, String actual) {
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if (!Objects.equals(expected, actual)) {
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throw new AssertionError("Unexpected result, expected: " + expected + "," +
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" actual: " + actual);
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}
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}
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record R1(Object o) {}
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record R2(Object o1, Object o2) {}
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record R3(Object o1, Object o2, Object o3) {}
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}
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