Locator: Enable to show C++ type aliases

These were not showing up in any global symbol list so far.

Fixes: QTCREATORBUG-5800
Change-Id: I8e5c3b9b26f09d8cbcd31431e28c103da05d9bf8
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/cpptools/cppindexingsupport.h

@@ -47,7 +47,8 @@ public:
         Classes      = 0x1,
         Functions    = 0x2,
         Enums        = 0x4,
-        Declarations = 0x8
+        Declarations = 0x8,
+        TypeAliases  = 0x16,
     };
 
     Q_DECLARE_FLAGS(SymbolTypes, SymbolType)

src/plugins/cpptools/cpplocatordata.cpp

@@ -35,7 +35,8 @@ CppLocatorData::CppLocatorData()
 {
     m_search.setSymbolsToSearchFor(SymbolSearcher::Enums |
                                    SymbolSearcher::Classes |
-                                   SymbolSearcher::Functions);
+                                   SymbolSearcher::Functions |
+                                   SymbolSearcher::TypeAliases);
     m_pendingDocuments.reserve(MaxPendingDocuments);
 }
 

src/plugins/cpptools/cpptoolsconstants.h

@@ -89,7 +89,7 @@ const char INCLUDES_FILTER_ID[] = "All Included C/C++ Files";
 const char INCLUDES_FILTER_DISPLAY_NAME[] = QT_TRANSLATE_NOOP("CppTools", "All Included C/C++ Files");
 
 const char LOCATOR_FILTER_ID[] = "Classes and Methods";
-const char LOCATOR_FILTER_DISPLAY_NAME[] = QT_TRANSLATE_NOOP("CppTools", "C++ Classes, Enums and Functions");
+const char LOCATOR_FILTER_DISPLAY_NAME[] = QT_TRANSLATE_NOOP("CppTools", "C++ Classes, Enums, Functions and Type Aliases");
 
 const char SYMBOLS_FIND_FILTER_ID[] = "Symbols";
 const char SYMBOLS_FIND_FILTER_DISPLAY_NAME[] = QT_TRANSLATE_NOOP("CppTools", "C++ Symbols");

src/plugins/cpptools/searchsymbols.cpp

@@ -121,8 +121,10 @@ bool SearchSymbols::visit(Namespace *symbol)
 bool SearchSymbols::visit(Declaration *symbol)
 {
     if (!(symbolsToSearchFor & SymbolSearcher::Declarations)) {
-        // if we're searching for functions, still allow signal declarations to show up.
-        if (symbolsToSearchFor & SymbolSearcher::Functions) {
+        if ((symbolsToSearchFor & SymbolSearcher::TypeAliases) && symbol->type().isTypedef()) {
+            // Continue.
+        } else if (symbolsToSearchFor & SymbolSearcher::Functions) {
+            // if we're searching for functions, still allow signal declarations to show up.
             Function *funTy = symbol->type()->asFunctionType();
             if (!funTy) {
                 if (!symbol->type()->asObjCMethodType())

src/plugins/cpptools/symbolsearcher_test.cpp

@@ -197,6 +197,7 @@ void CppToolsPlugin::test_builtinsymbolsearcher_data()
             << ResultData(_("functionDefinedOutSideClass(char)"), _("MyNamespace::MyClass"))
             << ResultData(_("functionDefinedOutSideClassAndNamespace(float)"),
                           _("MyNamespace::MyClass"))
+            << ResultData(_("MyNamespace::MyClass MY_CLASS"), _(""))
             << ResultData(_("int myVariable"), _("<anonymous namespace>"))
             << ResultData(_("myFunction(bool, int)"), _("<anonymous namespace>"))
             << ResultData(_("MyEnum"), _("<anonymous namespace>"))
@@ -211,6 +212,7 @@ void CppToolsPlugin::test_builtinsymbolsearcher_data()
                           _("<anonymous namespace>::MyClass"))
             << ResultData(_("functionDefinedOutSideClass(char)"),
                           _("<anonymous namespace>::MyClass"))
+            << ResultData(_("MyClass MY_OTHER_CLASS"), _(""))
             << ResultData(_("main()"), _(""))
 
         );

tests/cppsymbolsearcher/testdata_basic/file1.cpp

@@ -52,6 +52,7 @@ int MyClass::functionDefinedOutSideClass(char c) {}
 } // namespace MyNamespace
 
 int MyNamespace::MyClass::functionDefinedOutSideClassAndNamespace(float x) {}
+using MY_CLASS = MyNamespace::MyClass;
 
 //
 // Symbols in an anonymous namespace
@@ -78,5 +79,6 @@ int MyClass::functionDefinedOutSideClass(char c) {}
 
 } // anonymous namespace
 
+typedef MyClass MY_OTHER_CLASS;
 
 int main() {}