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Code Issues Wiki Activity

Bug 395018 - False 'member was not initalized in this constructor'

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warning for defaulted copy/move constructor

Change-Id: Ib7800e46174b195fd15daef923abfff482fd3aff
Reviewed-on: https://git.eclipse.org/r/9059
Reviewed-by: Sergey Prigogin <eclipse.sprigogin@gmail.com>
IP-Clean: Sergey Prigogin <eclipse.sprigogin@gmail.com>
Tested-by: Sergey Prigogin <eclipse.sprigogin@gmail.com>
This commit is contained in:
Nathan Ridge 2012-12-06 23:17:52 -05:00 • committed by Sergey Prigogin
parent 7582b75465
commit 032c010a82
3 changed files with 97 additions and 9 deletions
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11
codan/org.eclipse.cdt.codan.checkers/src/org/eclipse/cdt/codan/internal/checkers/ClassMembersInitializationChecker.java
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@ -8,6 +8,7 @@
* Contributors:
* Anton Gorenkov - initial implementation
* Marc-Andre Laperle
* Nathan Ridge
*******************************************************************************/
package org.eclipse.cdt.codan.internal.checkers;
@ -44,6 +45,7 @@ import org.eclipse.cdt.core.dom.ast.cpp.ICPPConstructor;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPFunction;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPMethod;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPReferenceType;
import org.eclipse.cdt.core.dom.ast.cpp.SemanticQueries;
import org.eclipse.cdt.core.index.IIndex;
import org.eclipse.cdt.core.index.IIndexBinding;
import org.eclipse.cdt.internal.core.dom.parser.cpp.ClassTypeHelper;
@ -254,9 +256,12 @@ public class ClassMembersInitializationChecker extends AbstractIndexAstChecker {
IBinding binding = functionDefinition.getDeclarator().getName().resolveBinding();
if (binding instanceof ICPPConstructor) {
ICPPConstructor constructor = (ICPPConstructor) binding;
if (constructor.getClassOwner().getKey() != ICompositeType.k_union) {
return constructor;
}
// Skip defaulted copy and move constructors.
if (functionDefinition.isDefaulted() && SemanticQueries.isCopyOrMoveConstructor(constructor))
return null;
if (constructor.getClassOwner().getKey() == ICompositeType.k_union)
return null;
return constructor;
}
}

26
codan/org.eclipse.cdt.codan.core.test/src/org/eclipse/cdt/codan/core/internal/checkers/ClassMembersInitializationCheckerTest.java
View file

@ -8,6 +8,7 @@
* Contributors:
* Anton Gorenkov - initial implementation
* Marc-Andre Laperle
* Nathan Ridge
*******************************************************************************/
package org.eclipse.cdt.codan.core.internal.checkers;
@ -578,12 +579,27 @@ public class ClassMembersInitializationCheckerTest extends CheckerTestCase {
checkNoErrors();
}
// struct S {
// int i;
// S() = default;
// };
public void testBug365498_defaultedConstructor() throws Exception{
// struct S {
// int i;
// S() = default;
// };
public void testBug365498_defaultedConstructor() throws Exception {
loadCodeAndRun(getAboveComment());
checkErrorLine(3);
}
// struct S {
// S(S&) = default;
// S(const S&) = default;
// S(volatile S&) = default;
// S(const volatile S&) = default;
// S(S&&) = default;
// S(const S&&) = default;
// S(volatile S&&) = default;
// S(const volatile S&&) = default;
// };
public void testBug395018_defaultedCopyOrMoveConstructor() throws Exception {
loadCodeAndRun(getAboveComment());
checkNoErrors();
}
}

67
core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/ast/cpp/SemanticQueries.java Normal file
View file

@ -0,0 +1,67 @@
/*******************************************************************************
* Copyright (c) 2012 Nathan Ridge.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Nathan Ridge - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.core.dom.ast.cpp;
import static org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.SemanticUtil.CVTYPE;
import static org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.SemanticUtil.TDEF;
import org.eclipse.cdt.core.dom.ast.IType;
import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.SemanticUtil;
/**
* @since 5.5
*/
public class SemanticQueries {
public static boolean isCopyOrMoveConstructor(ICPPConstructor constructor) {
return isCopyOrMoveConstructor(constructor, CopyOrMoveConstructorKind.COPY_OR_MOVE);
}
public static boolean isMoveConstructor(ICPPConstructor constructor) {
return isCopyOrMoveConstructor(constructor, CopyOrMoveConstructorKind.MOVE);
}
public static boolean isCopyConstructor(ICPPConstructor constructor) {
return isCopyOrMoveConstructor(constructor, CopyOrMoveConstructorKind.COPY);
}
private enum CopyOrMoveConstructorKind { COPY, MOVE, COPY_OR_MOVE }
private static boolean isCopyOrMoveConstructor(ICPPConstructor constructor, CopyOrMoveConstructorKind kind) {
// 12.8/2-3 [class.copy]:
// "A non-template constructor for class X is a copy [move] constructor
// if its first parameter is of type X&[&], const X&[&], volatile X&[&]
// or const volatile X&[&], and either there are no other parametrs or
// else all other parametrs have default arguments."
if (constructor instanceof ICPPFunctionTemplate)
return false;
if (!isCallableWithNumberOfArguments(constructor, 1))
return false;
IType firstArgumentType = constructor.getType().getParameterTypes()[0];
firstArgumentType = SemanticUtil.getNestedType(firstArgumentType, TDEF);
if (!(firstArgumentType instanceof ICPPReferenceType))
return false;
ICPPReferenceType firstArgReferenceType = (ICPPReferenceType) firstArgumentType;
boolean isRvalue = firstArgReferenceType.isRValueReference();
if (isRvalue && kind == CopyOrMoveConstructorKind.COPY)
return false;
if (!isRvalue && kind == CopyOrMoveConstructorKind.MOVE)
return false;
firstArgumentType = firstArgReferenceType.getType();
firstArgumentType = SemanticUtil.getNestedType(firstArgumentType, CVTYPE);
return firstArgumentType.isSameType(constructor.getClassOwner());
}
private static boolean isCallableWithNumberOfArguments(ICPPFunction function, int numArguments) {
return function.getParameters().length >= numArguments
&& function.getRequiredArgumentCount() <= numArguments;
}
}