Fix: Switch Between Method Declaration/Definition issue when has implementation in header file

Task-number: QTCREATORBUG-8393

Change-Id: Ie390e3151e6edc68287e5e0241365d128e6e2c4c
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

src/plugins/cppeditor/cppeditor.cpp

@@ -1120,10 +1120,12 @@ void CPPEditorWidget::switchDeclarationDefinition()
             foreach (const LookupItem &r, declarations) {
                 if (Symbol *decl = r.declaration()) {
                     if (Function *funTy = decl->type()->asFunctionType()) {
-                        if (funTy->isEqualTo(function) && decl != function && binding == r.binding())
-                            best.prepend(decl);
-                        else
-                            best.append(decl);
+                        if (funTy->isEqualTo(function)) {
+                            if (decl != function && binding == r.binding())
+                                best.prepend(decl);
+                            else
+                                best.append(decl);
+                        }
                     }
                 }
             }
@@ -1131,7 +1133,7 @@ void CPPEditorWidget::switchDeclarationDefinition()
                 openCppEditorAt(linkToSymbol(best.first()));
 
         } else if (lastVisibleSymbol && lastVisibleSymbol->isDeclaration() && lastVisibleSymbol->type()->isFunctionType()) {
-            if (Symbol *def = symbolFinder()->findMatchingDefinition(lastVisibleSymbol, snapshot))
+            if (Symbol *def = symbolFinder()->findMatchingDefinition(lastVisibleSymbol, snapshot, true))
                 openCppEditorAt(linkToSymbol(def));
         }
     }

src/plugins/cpptools/symbolfinder.cpp

@@ -158,6 +158,9 @@ Symbol *SymbolFinder::findMatchingDefinition(Symbol *declaration,
                 continue; // nothing to do
 
             foreach (Function *fun, result) {
+                if (fun->unqualifiedName()->isDestructorNameId() != declaration->unqualifiedName()->isDestructorNameId())
+                    continue;
+
                 const QList<LookupItem> declarations = context.lookup(fun->name(), fun->enclosingScope());
                 if (declarations.isEmpty())
                     continue;