Make some qHash and comparison operators overloads hidden friends

Restricts lookup scope more to necessary bits.

Change-Id: Ia42c95aaa70534843b7f6a90bfc56d2a1202c612
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

50 files changed, 332 insertions, 360 deletions

diff --git a/src/plugins/clangtools/clangfileinfo.h b/src/plugins/clangtools/clangfileinfo.h
index 5052af23ad..7f2e94a82f 100644
--- a/src/plugins/clangtools/clangfileinfo.h
+++ b/src/plugins/clangtools/clangfileinfo.h
@@ -46,16 +46,17 @@ public:
         , kind(kind)
         , projectPart(projectPart)
     {}
+
+    friend bool operator==(const FileInfo &lhs, const FileInfo &rhs) {
+        return lhs.file == rhs.file;
+    }
+
     Utils::FilePath file;
     CppEditor::ProjectFile::Kind kind;
     CppEditor::ProjectPart::ConstPtr projectPart;
 };
 using FileInfos = std::vector<FileInfo>;
 
-inline bool operator==(const FileInfo &lhs, const FileInfo &rhs) {
-    return lhs.file == rhs.file;
-}
-
 class FileInfoSelection {
 public:
     QSet<Utils::FilePath> dirs;
diff --git a/src/plugins/clangtools/clangtoolsdiagnostic.h b/src/plugins/clangtools/clangtoolsdiagnostic.h
index 10534ff0b2..58961d0ca9 100644
--- a/src/plugins/clangtools/clangtoolsdiagnostic.h
+++ b/src/plugins/clangtools/clangtoolsdiagnostic.h
@@ -57,6 +57,9 @@ public:
     bool isValid() const;
     QIcon icon() const;
 
+    friend bool operator==(const Diagnostic &lhs, const Diagnostic &rhs);
+    friend Utils::QHashValueType qHash(const Diagnostic &diagnostic);
+
     QString name;
     QString description;
     QString category;
@@ -66,12 +69,8 @@ public:
     bool hasFixits = false;
 };
 
-bool operator==(const Diagnostic &lhs, const Diagnostic &rhs);
-
 using Diagnostics = QList<Diagnostic>;
 
-Utils::QHashValueType qHash(const Diagnostic &diagnostic);
-
 } // namespace Internal
 } // namespace ClangTools
 
diff --git a/src/plugins/clangtools/clangtoolsprojectsettings.h b/src/plugins/clangtools/clangtoolsprojectsettings.h
index 686aafedfb..be68e5d80b 100644
--- a/src/plugins/clangtools/clangtoolsprojectsettings.h
+++ b/src/plugins/clangtools/clangtoolsprojectsettings.h
@@ -47,18 +47,18 @@ public:
 
     SuppressedDiagnostic(const Diagnostic &diag);
 
+    friend bool operator==(const SuppressedDiagnostic &d1, const SuppressedDiagnostic &d2)
+    {
+        return d1.filePath == d2.filePath
+                && d1.description == d2.description
+                && d1.uniquifier == d2.uniquifier;
+    }
+
     Utils::FilePath filePath; // Relative for files in project, absolute otherwise.
     QString description;
     int uniquifier;
 };
 
-inline bool operator==(const SuppressedDiagnostic &d1, const SuppressedDiagnostic &d2)
-{
-    return d1.filePath == d2.filePath
-        && d1.description == d2.description
-        && d1.uniquifier == d2.uniquifier;
-}
-
 using SuppressedDiagnosticsList = QList<SuppressedDiagnostic>;
 
 class ClangToolsProjectSettings : public QObject
diff --git a/src/plugins/classview/classviewsymbolinformation.h b/src/plugins/classview/classviewsymbolinformation.h
index c6189c0b39..3e719bf89b 100644
--- a/src/plugins/classview/classviewsymbolinformation.h
+++ b/src/plugins/classview/classviewsymbolinformation.h
@@ -55,21 +55,15 @@ public:
 
     int iconTypeSortOrder() const;
 
+    friend auto qHash(const SymbolInformation &information) { return information.hash(); }
+
 private:
     const int m_iconType;
     const Utils::QHashValueType m_hash; // precalculated hash value - to speed up qHash
     const QString m_name;               // symbol name (e.g. SymbolInformation)
     const QString m_type;               // symbol type (e.g. (int char))
-
 };
 
-//! qHash overload for QHash/QSet
-inline auto qHash(const SymbolInformation &information)
-{
-    return information.hash();
-}
-
-
 } // namespace Internal
 } // namespace ClassView
 
diff --git a/src/plugins/clearcase/clearcasesettings.h b/src/plugins/clearcase/clearcasesettings.h
index e3700239f3..03391af6ae 100644
--- a/src/plugins/clearcase/clearcasesettings.h
+++ b/src/plugins/clearcase/clearcasesettings.h
@@ -54,6 +54,11 @@ public:
 
     bool equals(const ClearCaseSettings &s) const;
 
+    friend bool operator==(const ClearCaseSettings &p1, const ClearCaseSettings &p2)
+    { return p1.equals(p2); }
+    friend bool operator!=(const ClearCaseSettings &p1, const ClearCaseSettings &p2)
+    { return !p1.equals(p2); }
+
     QString ccCommand;
     QString ccBinaryPath;
     DiffType diffType = GraphicalDiff;
@@ -71,10 +76,5 @@ public:
     int timeOutS;
 };
 
-inline bool operator==(const ClearCaseSettings &p1, const ClearCaseSettings &p2)
-{ return p1.equals(p2); }
-inline bool operator!=(const ClearCaseSettings &p1, const ClearCaseSettings &p2)
-{ return !p1.equals(p2); }
-
 } // namespace Internal
 } // namespace ClearCase
diff --git a/src/plugins/cmakeprojectmanager/cmakeconfigitem.h b/src/plugins/cmakeprojectmanager/cmakeconfigitem.h
index 19bbbfd7d6..f94674f623 100644
--- a/src/plugins/cmakeprojectmanager/cmakeconfigitem.h
+++ b/src/plugins/cmakeprojectmanager/cmakeconfigitem.h
@@ -68,6 +68,7 @@ public:
     QString toCMakeSetLine(const Utils::MacroExpander *expander = nullptr) const;
 
     bool operator==(const CMakeConfigItem &o) const;
+    friend Utils::QHashValueType qHash(const CMakeConfigItem &it);  // needed for MSVC
 
     QByteArray key;
     Type type = STRING;
@@ -79,8 +80,6 @@ public:
     QStringList values;
 };
 
-Utils::QHashValueType qHash(const CMakeConfigItem &it);  // needed for MSVC
-
 class CMAKE_EXPORT CMakeConfig : public QList<CMakeConfigItem>
 {
 public:
diff --git a/src/plugins/cmakeprojectmanager/fileapidataextractor.h b/src/plugins/cmakeprojectmanager/fileapidataextractor.h
index 1bc99bf1a8..6a5b905a6e 100644
--- a/src/plugins/cmakeprojectmanager/fileapidataextractor.h
+++ b/src/plugins/cmakeprojectmanager/fileapidataextractor.h
@@ -48,6 +48,7 @@ class CMakeFileInfo
 {
 public:
     bool operator==(const CMakeFileInfo& other) const { return path == other.path; }
+    friend auto qHash(const CMakeFileInfo &info, uint seed = 0) { return info.path.hash(seed); }
 
     Utils::FilePath path;
     bool isCMake = false;
@@ -56,8 +57,6 @@ public:
     bool isGenerated = false;
 };
 
-inline auto qHash(const CMakeFileInfo &info, uint seed = 0) { return info.path.hash(seed); }
-
 class FileApiQtcData
 {
 public:
diff --git a/src/plugins/coreplugin/find/findplugin.cpp b/src/plugins/coreplugin/find/findplugin.cpp
index 4376553bee..57b6a5649e 100644
--- a/src/plugins/coreplugin/find/findplugin.cpp
+++ b/src/plugins/coreplugin/find/findplugin.cpp
@@ -75,20 +75,20 @@ namespace Core {
 
 struct CompletionEntry
 {
+    friend QDebug operator<<(QDebug d, const CompletionEntry &e)
+    {
+        QDebugStateSaver saver(d);
+        d.noquote();
+        d.nospace();
+        d << "CompletionEntry(\"" << e.text << "\", flags="
+          << "0x" << QString::number(e.findFlags, 16) << ')';
+        return d;
+    }
+
     QString text;
     FindFlags findFlags;
 };
 
-QDebug operator<<(QDebug d, const CompletionEntry &e)
-{
-    QDebugStateSaver saver(d);
-    d.noquote();
-    d.nospace();
-    d << "CompletionEntry(\"" << e.text << "\", flags="
-      << "0x" << QString::number(e.findFlags, 16) << ')';
-    return d;
-}
-
 class CompletionModel : public QAbstractListModel
 {
 public:
diff --git a/src/plugins/coreplugin/find/searchresultcolor.h b/src/plugins/coreplugin/find/searchresultcolor.h
index ec1b4c1bd4..9a68f1c35a 100644
--- a/src/plugins/coreplugin/find/searchresultcolor.h
+++ b/src/plugins/coreplugin/find/searchresultcolor.h
@@ -32,7 +32,8 @@
 
 namespace Core {
 
-class CORE_EXPORT SearchResultColor {
+class CORE_EXPORT SearchResultColor
+{
 public:
     enum class Style { Default, Alt1, Alt2 };
 
@@ -48,18 +49,17 @@ public:
             highlightForeground = textForeground;
     }
 
+    friend auto qHash(SearchResultColor::Style style)
+    {
+        return QT_PREPEND_NAMESPACE(qHash(int(style)));
+    }
+
     QColor textBackground;
     QColor textForeground;
     QColor highlightBackground;
     QColor highlightForeground;
 };
 
-
-inline auto qHash(SearchResultColor::Style style)
-{
-    return QT_PREPEND_NAMESPACE(qHash(int(style)));
-}
-
 using SearchResultColors = QHash<SearchResultColor::Style, SearchResultColor>;
 
 } // namespace Core
diff --git a/src/plugins/coreplugin/icontext.h b/src/plugins/coreplugin/icontext.h
index 792217edb9..9ba7f5c219 100644
--- a/src/plugins/coreplugin/icontext.h
+++ b/src/plugins/coreplugin/icontext.h
@@ -82,6 +82,8 @@ public:
     virtual void setWidget(QWidget *widget) { m_widget = widget; }
     virtual void setContextHelp(const HelpItem &id) { m_contextHelp = id; }
 
+    friend CORE_EXPORT QDebug operator<<(QDebug debug, const Core::Context &context);
+
 protected:
     Context m_context;
     QPointer<QWidget> m_widget;
@@ -89,4 +91,3 @@ protected:
 };
 
 } // namespace Core
-CORE_EXPORT QDebug operator<<(QDebug debug, const Core::Context &context);
diff --git a/src/plugins/cppeditor/cppcodemodelsettings.h b/src/plugins/cppeditor/cppcodemodelsettings.h
index afebead552..3508233575 100644
--- a/src/plugins/cppeditor/cppcodemodelsettings.h
+++ b/src/plugins/cppeditor/cppcodemodelsettings.h
@@ -107,6 +107,18 @@ public:
         QVariantMap toMap() const;
         void fromMap(const QVariantMap &map);
 
+        friend bool operator==(const Data &s1, const Data &s2)
+        {
+            return s1.useClangd == s2.useClangd
+                    && s1.executableFilePath == s2.executableFilePath
+                    && s1.sessionsWithOneClangd == s2.sessionsWithOneClangd
+                    && s1.workerThreadLimit == s2.workerThreadLimit
+                    && s1.enableIndexing == s2.enableIndexing
+                    && s1.autoIncludeHeaders == s2.autoIncludeHeaders
+                    && s1.documentUpdateThreshold == s2.documentUpdateThreshold;
+        }
+        friend bool operator!=(const Data &s1, const Data &s2) { return !(s1 == s2); }
+
         Utils::FilePath executableFilePath;
         QStringList sessionsWithOneClangd;
         int workerThreadLimit = 0;
@@ -153,21 +165,6 @@ private:
     Data m_data;
 };
 
-inline bool operator==(const ClangdSettings::Data &s1, const ClangdSettings::Data &s2)
-{
-    return s1.useClangd == s2.useClangd
-            && s1.executableFilePath == s2.executableFilePath
-            && s1.sessionsWithOneClangd == s2.sessionsWithOneClangd
-            && s1.workerThreadLimit == s2.workerThreadLimit
-            && s1.enableIndexing == s2.enableIndexing
-            && s1.autoIncludeHeaders == s2.autoIncludeHeaders
-            && s1.documentUpdateThreshold == s2.documentUpdateThreshold;
-}
-inline bool operator!=(const ClangdSettings::Data &s1, const ClangdSettings::Data &s2)
-{
-    return !(s1 == s2);
-}
-
 class CPPEDITOR_EXPORT ClangdProjectSettings
 {
 public:
diff --git a/src/plugins/cppeditor/cppprojectfile.h b/src/plugins/cppeditor/cppprojectfile.h
index 1bd80fdf65..52b3f5b4c3 100644
--- a/src/plugins/cppeditor/cppprojectfile.h
+++ b/src/plugins/cppeditor/cppprojectfile.h
@@ -50,6 +50,9 @@ public:
         OpenCLSource,
     };
 
+    ProjectFile() = default;
+    ProjectFile(const QString &filePath, Kind kind, bool active = true);
+
     static Kind classifyByMimeType(const QString &mt);
     static Kind classify(const QString &filePath);
 
@@ -69,12 +72,10 @@ public:
     bool isC() const;
     bool isCxx() const;
 
-public:
-    ProjectFile() = default;
-    ProjectFile(const QString &filePath, Kind kind, bool active = true);
-
     bool operator==(const ProjectFile &other) const;
+    friend QDebug operator<<(QDebug stream, const CppEditor::ProjectFile &projectFile);
 
+public:
     QString path;
     Kind kind = Unclassified;
     bool active = true;
@@ -83,6 +84,5 @@ public:
 using ProjectFiles = QVector<ProjectFile>;
 
 const char *projectFileKindToText(ProjectFile::Kind kind);
-QDebug operator<<(QDebug stream, const CppEditor::ProjectFile &projectFile);
 
 } // namespace CppEditor
diff --git a/src/plugins/cppeditor/cppuseselections_test.cpp b/src/plugins/cppeditor/cppuseselections_test.cpp
index ecf27e406a..2bf5e6271c 100644
--- a/src/plugins/cppeditor/cppuseselections_test.cpp
+++ b/src/plugins/cppeditor/cppuseselections_test.cpp
@@ -33,8 +33,13 @@
 #include <QtTest>
 
 // Uses 1-based line and 0-based column.
-struct Selection {
+struct Selection
+{
     Selection(int line, int column, int length) : line(line), column(column), length(length) {}
+
+    friend bool operator==(const Selection &l, const Selection &r)
+    { return l.line == r.line && l.column == r.column && l.length == r.length; }
+
     int line;
     int column;
     int length;
@@ -42,9 +47,6 @@ struct Selection {
 typedef QList<Selection> SelectionList;
 Q_DECLARE_METATYPE(SelectionList)
 
-inline bool operator==(const Selection &l, const Selection &r)
-{ return l.line == r.line && l.column == r.column && l.length == r.length; }
-
 QT_BEGIN_NAMESPACE
 namespace QTest {
 template<> char *toString(const Selection &selection)
diff --git a/src/plugins/cppeditor/followsymbol_switchmethoddecldef_test.cpp b/src/plugins/cppeditor/followsymbol_switchmethoddecldef_test.cpp
index 59bd65c092..8cfff10c65 100644
--- a/src/plugins/cppeditor/followsymbol_switchmethoddecldef_test.cpp
+++ b/src/plugins/cppeditor/followsymbol_switchmethoddecldef_test.cpp
@@ -82,27 +82,29 @@ using namespace TextEditor;
 using namespace Core;
 using namespace ProjectExplorer;
 
-class OverrideItem {
+class OverrideItem
+{
 public:
     OverrideItem() : line(0) {}
     OverrideItem(const QString &text, int line = 0) : text(text), line(line) {}
+
     bool isValid() { return line != 0; }
     QByteArray toByteArray() const
     {
         return "OverrideItem(" + text.toLatin1() + ", " + QByteArray::number(line) + ')';
     }
 
+    friend bool operator==(const OverrideItem &lhs, const OverrideItem &rhs)
+    {
+        return lhs.text == rhs.text && lhs.line == rhs.line;
+    }
+
     QString text;
     int line;
 };
 typedef QList<OverrideItem> OverrideItemList;
 Q_DECLARE_METATYPE(OverrideItem)
 
-inline bool operator==(const OverrideItem &lhs, const OverrideItem &rhs)
-{
-    return lhs.text == rhs.text && lhs.line == rhs.line;
-}
-
 QT_BEGIN_NAMESPACE
 namespace QTest {
 template<> char *toString(const OverrideItem &data)
diff --git a/src/plugins/debugger/analyzer/diagnosticlocation.h b/src/plugins/debugger/analyzer/diagnosticlocation.h
index 76459d7661..fe52fe9248 100644
--- a/src/plugins/debugger/analyzer/diagnosticlocation.h
+++ b/src/plugins/debugger/analyzer/diagnosticlocation.h
@@ -43,6 +43,10 @@ public:
 
     bool isValid() const;
 
+    DEBUGGER_EXPORT friend bool operator==(const DiagnosticLocation &first, const DiagnosticLocation &second);
+    DEBUGGER_EXPORT friend bool operator<(const DiagnosticLocation &first, const DiagnosticLocation &second);
+    DEBUGGER_EXPORT friend QDebug operator<<(QDebug dbg, const DiagnosticLocation &location);
+
     Utils::FilePath filePath;
 
     // Both values start at 1.
@@ -50,10 +54,6 @@ public:
     int column = 0;
 };
 
-DEBUGGER_EXPORT bool operator==(const DiagnosticLocation &first, const DiagnosticLocation &second);
-DEBUGGER_EXPORT bool operator<(const DiagnosticLocation &first, const DiagnosticLocation &second);
-DEBUGGER_EXPORT QDebug operator<<(QDebug dbg, const DiagnosticLocation &location);
-
 } // namespace Debugger
 
 Q_DECLARE_METATYPE(Debugger::DiagnosticLocation)
diff --git a/src/plugins/debugger/cdb/cdbparsehelpers.h b/src/plugins/debugger/cdb/cdbparsehelpers.h
index 5053a6de7e..ab39ebc612 100644
--- a/src/plugins/debugger/cdb/cdbparsehelpers.h
+++ b/src/plugins/debugger/cdb/cdbparsehelpers.h
@@ -79,6 +79,8 @@ struct WinException
     void fromGdbMI(const GdbMi &);
     QString toString(bool includeLocation = false) const;
 
+    friend  QDebug operator<<(QDebug s, const WinException &e);
+
     unsigned exceptionCode = 0;
     unsigned exceptionFlags = 0;
     quint64 exceptionAddress = 0;
@@ -90,7 +92,5 @@ struct WinException
     QString function;
 };
 
-QDebug operator<<(QDebug s, const WinException &e);
-
 } // namespace Internal
 } // namespace Debugger
diff --git a/src/plugins/git/gerrit/gerritparameters.h b/src/plugins/git/gerrit/gerritparameters.h
index 96e03fd559..5c0d89a3e4 100644
--- a/src/plugins/git/gerrit/gerritparameters.h
+++ b/src/plugins/git/gerrit/gerritparameters.h
@@ -46,6 +46,11 @@ public:
     void fromSettings(const QSettings *);
     void setPortFlagBySshType();
 
+    friend bool operator==(const GerritParameters &p1, const GerritParameters &p2)
+    { return p1.equals(p2); }
+    friend bool operator!=(const GerritParameters &p1, const GerritParameters &p2)
+    { return !p1.equals(p2); }
+
     GerritServer server;
     Utils::FilePath ssh;
     Utils::FilePath curl;
@@ -54,10 +59,5 @@ public:
     QString portFlag;
 };
 
-inline bool operator==(const GerritParameters &p1, const GerritParameters &p2)
-{ return p1.equals(p2); }
-inline bool operator!=(const GerritParameters &p1, const GerritParameters &p2)
-{ return !p1.equals(p2); }
-
 } // namespace Internal
 } // namespace Gerrit
diff --git a/src/plugins/languageclient/semantichighlightsupport.h b/src/plugins/languageclient/semantichighlightsupport.h
index 724e85f837..d6a9fc314d 100644
--- a/src/plugins/languageclient/semantichighlightsupport.h
+++ b/src/plugins/languageclient/semantichighlightsupport.h
@@ -44,17 +44,19 @@ class Client;
 class LANGUAGECLIENT_EXPORT ExpandedSemanticToken
 {
 public:
+    friend bool operator==(const ExpandedSemanticToken &t1, const ExpandedSemanticToken &t2)
+    {
+        return t1.line == t2.line && t1.column == t2.column && t1.length == t2.length
+                && t1.type == t2.type && t1.modifiers == t2.modifiers;
+    }
+
     int line = -1;
     int column = -1;
     int length = -1;
     QString type;
     QStringList modifiers;
 };
-inline bool operator==(const ExpandedSemanticToken &t1, const ExpandedSemanticToken &t2)
-{
-    return t1.line == t2.line && t1.column == t2.column && t1.length == t2.length
-            && t1.type == t2.type && t1.modifiers == t2.modifiers;
-}
+
 using SemanticTokensHandler = std::function<void(TextEditor::TextDocument *,
                                                  const QList<ExpandedSemanticToken> &, int, bool)>;
 
diff --git a/src/plugins/marketplace/productlistmodel.h b/src/plugins/marketplace/productlistmodel.h
index df2070f213..6581bc344a 100644
--- a/src/plugins/marketplace/productlistmodel.h
+++ b/src/plugins/marketplace/productlistmodel.h
@@ -60,22 +60,22 @@ protected:
 
 struct Section
 {
+    friend bool operator<(const Section &lhs, const Section &rhs)
+    {
+        if (lhs.priority < rhs.priority)
+            return true;
+        return lhs.priority > rhs.priority ? false : lhs.name < rhs.name;
+    }
+
+    friend bool operator==(const Section &lhs, const Section &rhs)
+    {
+        return lhs.priority == rhs.priority && lhs.name == rhs.name;
+    }
+
     QString name;
     int priority;
 };
 
-inline bool operator<(const Section &lhs, const Section &rhs)
-{
-    if (lhs.priority < rhs.priority)
-        return true;
-    return lhs.priority > rhs.priority ? false : lhs.name < rhs.name;
-}
-
-inline bool operator==(const Section &lhs, const Section &rhs)
-{
-    return lhs.priority == rhs.priority && lhs.name == rhs.name;
-}
-
 class SectionedProducts : public QStackedWidget
 {
     Q_OBJECT
diff --git a/src/plugins/nim/suggest/clientrequests.cpp b/src/plugins/nim/suggest/clientrequests.cpp
index 4b1429a204..7dc7d9260f 100644
--- a/src/plugins/nim/suggest/clientrequests.cpp
+++ b/src/plugins/nim/suggest/clientrequests.cpp
@@ -51,14 +51,13 @@ NimSuggestClientRequest::NimSuggestClientRequest(quint64 id)
     : m_id(id)
 {}
 
-
-} // namespace Suggest
-} // namespace Nim
-
-QDebug operator<<(QDebug debug, const Nim::Suggest::Line &c)
+QDebug operator<<(QDebug debug, const Line &c)
 {
     QDebugStateSaver saver(debug);
     debug.space() << c.line_type << c.symbol_kind << c.symbol_type << c.data << c.row << c.column <<
                   c.abs_path;
     return debug;
 }
+
+} // namespace Suggest
+} // namespace Nim
diff --git a/src/plugins/nim/suggest/clientrequests.h b/src/plugins/nim/suggest/clientrequests.h
index 39c6719929..e9ca91b205 100644
--- a/src/plugins/nim/suggest/clientrequests.h
+++ b/src/plugins/nim/suggest/clientrequests.h
@@ -83,6 +83,8 @@ public:
     static bool fromString(LineType &type, const std::string &str);
     static bool fromString(SymbolKind &type, const std::string &str);
 
+    friend QDebug operator<<(QDebug debug, const Line &c);
+
     LineType line_type;
     SymbolKind symbol_kind;
     QString abs_path;
@@ -133,5 +135,3 @@ private:
 
 } // namespace Suggest
 } // namespace Nim
-
-QDebug operator<<(QDebug debug, const Nim::Suggest::Line &c);
diff --git a/src/plugins/projectexplorer/abi.h b/src/plugins/projectexplorer/abi.h
index 56272baced..a1f7142991 100644
--- a/src/plugins/projectexplorer/abi.h
+++ b/src/plugins/projectexplorer/abi.h
@@ -184,6 +184,15 @@ public:
     static Abi hostAbi();
     static Abis abisOfBinary(const Utils::FilePath &path);
 
+    friend auto qHash(const ProjectExplorer::Abi &abi)
+    {
+        int h = abi.architecture()
+                + (abi.os() << 3)
+                + (abi.osFlavor() << 6)
+                + (abi.binaryFormat() << 10)
+                + (abi.wordWidth() << 13);
+        return QT_PREPEND_NAMESPACE(qHash)(h);
+    }
 
 private:
     Architecture m_architecture;
@@ -194,14 +203,4 @@ private:
     QString m_param;
 };
 
-inline auto qHash(const ProjectExplorer::Abi &abi)
-{
-    int h = abi.architecture()
-            + (abi.os() << 3)
-            + (abi.osFlavor() << 6)
-            + (abi.binaryFormat() << 10)
-            + (abi.wordWidth() << 13);
-    return QT_PREPEND_NAMESPACE(qHash)(h);
-}
-
 } // namespace ProjectExplorer
diff --git a/src/plugins/projectexplorer/buildtargetinfo.h b/src/plugins/projectexplorer/buildtargetinfo.h
index 34d5f19624..7b5ef1984b 100644
--- a/src/plugins/projectexplorer/buildtargetinfo.h
+++ b/src/plugins/projectexplorer/buildtargetinfo.h
@@ -52,28 +52,28 @@ public:
     Utils::QHashValueType runEnvModifierHash = 0; // Make sure to update this when runEnvModifier changes!
 
     std::function<void(Utils::Environment &, bool)> runEnvModifier;
-};
 
-inline bool operator==(const BuildTargetInfo &ti1, const BuildTargetInfo &ti2)
-{
-    return ti1.buildKey == ti2.buildKey
-        && ti1.displayName == ti2.displayName
-        && ti1.targetFilePath == ti2.targetFilePath
-        && ti1.projectFilePath == ti2.projectFilePath
-        && ti1.workingDirectory == ti2.workingDirectory
-        && ti1.isQtcRunnable == ti2.isQtcRunnable
-        && ti1.usesTerminal == ti2.usesTerminal
-        && ti1.runEnvModifierHash == ti2.runEnvModifierHash;
-}
+    friend bool operator==(const BuildTargetInfo &ti1, const BuildTargetInfo &ti2)
+    {
+        return ti1.buildKey == ti2.buildKey
+            && ti1.displayName == ti2.displayName
+            && ti1.targetFilePath == ti2.targetFilePath
+            && ti1.projectFilePath == ti2.projectFilePath
+            && ti1.workingDirectory == ti2.workingDirectory
+            && ti1.isQtcRunnable == ti2.isQtcRunnable
+            && ti1.usesTerminal == ti2.usesTerminal
+            && ti1.runEnvModifierHash == ti2.runEnvModifierHash;
+    }
 
-inline bool operator!=(const BuildTargetInfo &ti1, const BuildTargetInfo &ti2)
-{
-    return !(ti1 == ti2);
-}
+    friend bool operator!=(const BuildTargetInfo &ti1, const BuildTargetInfo &ti2)
+    {
+        return !(ti1 == ti2);
+    }
 
-inline auto qHash(const BuildTargetInfo &ti)
-{
-    return qHash(ti.displayName) ^ qHash(ti.buildKey);
-}
+    friend auto qHash(const BuildTargetInfo &ti)
+    {
+        return qHash(ti.displayName) ^ qHash(ti.buildKey);
+    }
+};
 
 } // namespace ProjectExplorer
diff --git a/src/plugins/projectexplorer/deployablefile.h b/src/plugins/projectexplorer/deployablefile.h
index e3760e4a02..cc3273623e 100644
--- a/src/plugins/projectexplorer/deployablefile.h
+++ b/src/plugins/projectexplorer/deployablefile.h
@@ -55,23 +55,21 @@ public:
 
     bool isExecutable() const;
 
+    friend bool operator==(const DeployableFile &d1, const DeployableFile &d2)
+    {
+        return d1.localFilePath() == d2.localFilePath() && d1.remoteDirectory() == d2.remoteDirectory();
+    }
+
+    friend bool operator!=(const DeployableFile &d1, const DeployableFile &d2)
+    {
+        return !(d1 == d2);
+    }
+    friend PROJECTEXPLORER_EXPORT Utils::QHashValueType qHash(const DeployableFile &d);
+
 private:
     Utils::FilePath m_localFilePath;
     QString m_remoteDir;
     Type m_type = TypeNormal;
 };
 
-
-inline bool operator==(const DeployableFile &d1, const DeployableFile &d2)
-{
-    return d1.localFilePath() == d2.localFilePath() && d1.remoteDirectory() == d2.remoteDirectory();
-}
-
-inline bool operator!=(const DeployableFile &d1, const DeployableFile &d2)
-{
-    return !(d1 == d2);
-}
-
-PROJECTEXPLORER_EXPORT Utils::QHashValueType qHash(const DeployableFile &d);
-
 } // namespace ProjectExplorer
diff --git a/src/plugins/projectexplorer/headerpath.h b/src/plugins/projectexplorer/headerpath.h
index 37492fe9f1..ef7d7b3d7d 100644
--- a/src/plugins/projectexplorer/headerpath.h
+++ b/src/plugins/projectexplorer/headerpath.h
@@ -76,15 +76,15 @@ public:
         return {fp, HeaderPathType::Framework};
     }
 
+    friend auto qHash(const HeaderPath &key, uint seed = 0)
+    {
+        return ((qHash(key.path) << 2) | uint(key.type)) ^ seed;
+    }
+
     QString path;
     HeaderPathType type = HeaderPathType::User;
 };
 
-inline auto qHash(const HeaderPath &key, uint seed = 0)
-{
-    return ((qHash(key.path) << 2) | uint(key.type)) ^ seed;
-}
-
 using HeaderPaths = QVector<HeaderPath>;
 template<typename C> HeaderPaths toHeaderPaths(const C &list, HeaderPathType type)
 {
diff --git a/src/plugins/projectexplorer/projectexplorersettings.h b/src/plugins/projectexplorer/projectexplorersettings.h
index b5cbd7db3f..818651e7da 100644
--- a/src/plugins/projectexplorer/projectexplorersettings.h
+++ b/src/plugins/projectexplorer/projectexplorersettings.h
@@ -43,6 +43,25 @@ enum class StopBeforeBuild { None, SameProject, All, SameBuildDir, SameApp };
 class ProjectExplorerSettings
 {
 public:
+    friend bool operator==(const ProjectExplorerSettings &p1, const ProjectExplorerSettings &p2)
+    {
+        return p1.buildBeforeDeploy == p2.buildBeforeDeploy
+                && p1.deployBeforeRun == p2.deployBeforeRun
+                && p1.saveBeforeBuild == p2.saveBeforeBuild
+                && p1.useJom == p2.useJom
+                && p1.autorestoreLastSession == p2.autorestoreLastSession
+                && p1.prompToStopRunControl == p2.prompToStopRunControl
+                && p1.automaticallyCreateRunConfigurations == p2.automaticallyCreateRunConfigurations
+                && p1.addLibraryPathsToRunEnv == p2.addLibraryPathsToRunEnv
+                && p1.environmentId == p2.environmentId
+                && p1.stopBeforeBuild == p2.stopBeforeBuild
+                && p1.terminalMode == p2.terminalMode
+                && p1.closeSourceFilesWithProject == p2.closeSourceFilesWithProject
+                && p1.clearIssuesOnRebuild == p2.clearIssuesOnRebuild
+                && p1.abortBuildAllOnError == p2.abortBuildAllOnError
+                && p1.lowBuildPriority == p2.lowBuildPriority;
+    }
+
     BuildBeforeRunMode buildBeforeDeploy = BuildBeforeRunMode::WholeProject;
     bool deployBeforeRun = true;
     bool saveBeforeBuild = false;
@@ -66,25 +85,6 @@ public:
     QUuid environmentId;
 };
 
-inline bool operator==(const ProjectExplorerSettings &p1, const ProjectExplorerSettings &p2)
-{
-    return p1.buildBeforeDeploy == p2.buildBeforeDeploy
-            && p1.deployBeforeRun == p2.deployBeforeRun
-            && p1.saveBeforeBuild == p2.saveBeforeBuild
-            && p1.useJom == p2.useJom
-            && p1.autorestoreLastSession == p2.autorestoreLastSession
-            && p1.prompToStopRunControl == p2.prompToStopRunControl
-            && p1.automaticallyCreateRunConfigurations == p2.automaticallyCreateRunConfigurations
-            && p1.addLibraryPathsToRunEnv == p2.addLibraryPathsToRunEnv
-            && p1.environmentId == p2.environmentId
-            && p1.stopBeforeBuild == p2.stopBeforeBuild
-            && p1.terminalMode == p2.terminalMode
-            && p1.closeSourceFilesWithProject == p2.closeSourceFilesWithProject
-            && p1.clearIssuesOnRebuild == p2.clearIssuesOnRebuild
-            && p1.abortBuildAllOnError == p2.abortBuildAllOnError
-            && p1.lowBuildPriority == p2.lowBuildPriority;
-}
-
 class AppOutputSettings
 {
 public:
diff --git a/src/plugins/projectexplorer/projectmacro.h b/src/plugins/projectexplorer/projectmacro.h
index 76125b53af..0cdef8fee3 100644
--- a/src/plugins/projectexplorer/projectmacro.h
+++ b/src/plugins/projectexplorer/projectmacro.h
@@ -70,6 +70,19 @@ public:
     static Macro fromKeyValue(const QByteArray &text);
     QByteArray toKeyValue(const QByteArray &prefix) const;
 
+    friend auto qHash(const Macro &macro)
+    {
+        using QT_PREPEND_NAMESPACE(qHash);
+        return qHash(macro.key) ^ qHash(macro.value) ^ qHash(int(macro.type));
+    }
+
+    friend bool operator==(const Macro &first, const Macro &second)
+    {
+        return first.type == second.type
+                && first.key == second.key
+                && first.value == second.value;
+    }
+
 public:
     QByteArray key;
     QByteArray value;
@@ -84,19 +97,4 @@ private:
     static Macros tokensLinesToMacros(const QList<QList<QByteArray>> &tokensLines);
 };
 
-inline
-auto qHash(const Macro &macro)
-{
-    using QT_PREPEND_NAMESPACE(qHash);
-    return qHash(macro.key) ^ qHash(macro.value) ^ qHash(int(macro.type));
-}
-
-inline
-bool operator==(const Macro &first, const Macro &second)
-{
-    return first.type == second.type
-        && first.key == second.key
-        && first.value == second.value;
-}
-
 } // namespace ProjectExplorer
diff --git a/src/plugins/projectexplorer/task.h b/src/plugins/projectexplorer/task.h
index b95d51d34e..52cebcfc04 100644
--- a/src/plugins/projectexplorer/task.h
+++ b/src/plugins/projectexplorer/task.h
@@ -77,6 +77,10 @@ public:
     QString description() const;
     QIcon icon() const;
 
+    friend PROJECTEXPLORER_EXPORT bool operator==(const Task &t1, const Task &t2);
+    friend PROJECTEXPLORER_EXPORT bool operator<(const Task &a, const Task &b);
+    friend PROJECTEXPLORER_EXPORT Utils::QHashValueType qHash(const Task &task);
+
     unsigned int taskId = 0;
     TaskType type = Unknown;
     Options options = AddTextMark | FlashWorthy;
@@ -136,11 +140,6 @@ public:
 
 using Tasks = QVector<Task>;
 
-PROJECTEXPLORER_EXPORT bool operator==(const Task &t1, const Task &t2);
-PROJECTEXPLORER_EXPORT Utils::QHashValueType qHash(const Task &task);
-
-PROJECTEXPLORER_EXPORT bool operator<(const Task &a, const Task &b);
-
 PROJECTEXPLORER_EXPORT QString toHtml(const Tasks &issues);
 PROJECTEXPLORER_EXPORT bool containsType(const Tasks &issues, Task::TaskType);
 
diff --git a/src/plugins/qmakeprojectmanager/qmakestep.h b/src/plugins/qmakeprojectmanager/qmakestep.h
index 17e1fe2f13..c028dbce18 100644
--- a/src/plugins/qmakeprojectmanager/qmakestep.h
+++ b/src/plugins/qmakeprojectmanager/qmakestep.h
@@ -78,6 +78,25 @@ public:
 
     QStringList toArguments() const;
 
+    friend bool operator==(const QMakeStepConfig &a, const QMakeStepConfig &b)
+    {
+        return std::tie(a.archConfig, a.osType, a.linkQmlDebuggingQQ2)
+                == std::tie(b.archConfig, b.osType, b.linkQmlDebuggingQQ2)
+                && std::tie(a.useQtQuickCompiler, a.separateDebugInfo)
+                == std::tie(b.useQtQuickCompiler, b.separateDebugInfo);
+    }
+
+    friend bool operator!=(const QMakeStepConfig &a, const QMakeStepConfig &b) { return !(a == b); }
+
+    friend QDebug operator<<(QDebug dbg, const QMakeStepConfig &c)
+    {
+        dbg << c.archConfig << c.osType
+            << (c.linkQmlDebuggingQQ2 == Utils::TriState::Enabled)
+            << (c.useQtQuickCompiler == Utils::TriState::Enabled)
+            << (c.separateDebugInfo == Utils::TriState::Enabled);
+        return dbg;
+    }
+
     // Actual data
     QString sysRoot;
     QString targetTriple;
@@ -89,27 +108,6 @@ public:
     Utils::TriState useQtQuickCompiler;
 };
 
-
-inline bool operator ==(const QMakeStepConfig &a, const QMakeStepConfig &b) {
-    return std::tie(a.archConfig, a.osType, a.linkQmlDebuggingQQ2)
-               == std::tie(b.archConfig, b.osType, b.linkQmlDebuggingQQ2)
-            && std::tie(a.useQtQuickCompiler, a.separateDebugInfo)
-               == std::tie(b.useQtQuickCompiler, b.separateDebugInfo);
-}
-
-inline bool operator !=(const QMakeStepConfig &a, const QMakeStepConfig &b) {
-    return !(a == b);
-}
-
-inline QDebug operator<<(QDebug dbg, const QMakeStepConfig &c)
-{
-   dbg << c.archConfig << c.osType
-       << (c.linkQmlDebuggingQQ2 == Utils::TriState::Enabled)
-       << (c.useQtQuickCompiler == Utils::TriState::Enabled)
-       << (c.separateDebugInfo == Utils::TriState::Enabled);
-   return dbg;
-}
-
 class QMAKEPROJECTMANAGER_EXPORT QMakeStep : public ProjectExplorer::AbstractProcessStep
 {
     Q_OBJECT
diff --git a/src/plugins/qmljseditor/qmljseditingsettingspage.h b/src/plugins/qmljseditor/qmljseditingsettingspage.h
index e3536a44ef..296bc64b41 100644
--- a/src/plugins/qmljseditor/qmljseditingsettingspage.h
+++ b/src/plugins/qmljseditor/qmljseditingsettingspage.h
@@ -36,46 +36,46 @@ QT_END_NAMESPACE
 
 namespace QmlJSEditor {
 
-    class QmlJsEditingSettings {
-    public:
-        QmlJsEditingSettings();
-
-        static QmlJsEditingSettings get();
-        void set();
+class QmlJsEditingSettings
+{
+public:
+    QmlJsEditingSettings();
 
-        void fromSettings(QSettings *);
-        void toSettings(QSettings *) const;
+    static QmlJsEditingSettings get();
+    void set();
 
-        bool equals(const QmlJsEditingSettings &other) const;
+    void fromSettings(QSettings *);
+    void toSettings(QSettings *) const;
 
-        bool enableContextPane() const;
-        void setEnableContextPane(const bool enableContextPane);
+    bool equals(const QmlJsEditingSettings &other) const;
 
-        bool pinContextPane() const;
-        void setPinContextPane(const bool pinContextPane);
+    bool enableContextPane() const;
+    void setEnableContextPane(const bool enableContextPane);
 
-        bool autoFormatOnSave() const;
-        void setAutoFormatOnSave(const bool autoFormatOnSave);
+    bool pinContextPane() const;
+    void setPinContextPane(const bool pinContextPane);
 
-        bool autoFormatOnlyCurrentProject() const;
-        void setAutoFormatOnlyCurrentProject(const bool autoFormatOnlyCurrentProject);
+    bool autoFormatOnSave() const;
+    void setAutoFormatOnSave(const bool autoFormatOnSave);
 
-        bool foldAuxData() const;
-        void setFoldAuxData(const bool foldAuxData);
+    bool autoFormatOnlyCurrentProject() const;
+    void setAutoFormatOnlyCurrentProject(const bool autoFormatOnlyCurrentProject);
 
-    private:
-        bool m_enableContextPane;
-        bool m_pinContextPane;
-        bool m_autoFormatOnSave;
-        bool m_autoFormatOnlyCurrentProject;
-        bool m_foldAuxData;
-    };
+    bool foldAuxData() const;
+    void setFoldAuxData(const bool foldAuxData);
 
-    inline bool operator==(const QmlJsEditingSettings &s1, const QmlJsEditingSettings &s2)
+    friend bool operator==(const QmlJsEditingSettings &s1, const QmlJsEditingSettings &s2)
     { return s1.equals(s2); }
-    inline bool operator!=(const QmlJsEditingSettings &s1, const QmlJsEditingSettings &s2)
+    friend bool operator!=(const QmlJsEditingSettings &s1, const QmlJsEditingSettings &s2)
     { return !s1.equals(s2); }
 
+private:
+    bool m_enableContextPane;
+    bool m_pinContextPane;
+    bool m_autoFormatOnSave;
+    bool m_autoFormatOnlyCurrentProject;
+    bool m_foldAuxData;
+};
 
 namespace Internal {
 
diff --git a/src/plugins/qmlprofiler/qmleventlocation.h b/src/plugins/qmlprofiler/qmleventlocation.h
index 5faf907101..0c6fb2007d 100644
--- a/src/plugins/qmlprofiler/qmleventlocation.h
+++ b/src/plugins/qmlprofiler/qmleventlocation.h
@@ -55,6 +55,26 @@ public:
     int line() const { return m_line; }
     int column() const { return m_column; }
 
+    friend bool operator==(const QmlEventLocation &location1, const QmlEventLocation &location2)
+    {
+        // compare filename last as it's expensive.
+        return location1.line() == location2.line() && location1.column() == location2.column()
+                && location1.filename() == location2.filename();
+    }
+
+    friend bool operator!=(const QmlEventLocation &location1, const QmlEventLocation &location2)
+    {
+        return !(location1 == location2);
+    }
+
+    friend auto qHash(const QmlEventLocation &location)
+    {
+        return qHash(location.filename())
+                ^ ((location.line() & 0xfff)                   // 12 bits of line number
+                   | ((location.column() << 16) & 0xff0000));  // 8 bits of column
+
+    }
+
 private:
     friend QDataStream &operator>>(QDataStream &stream, QmlEventLocation &location);
     friend QDataStream &operator<<(QDataStream &stream, const QmlEventLocation &location);
@@ -64,29 +84,6 @@ private:
     int m_column = -1;
 };
 
-inline bool operator==(const QmlEventLocation &location1, const QmlEventLocation &location2)
-{
-    // compare filename last as it's expensive.
-    return location1.line() == location2.line() && location1.column() == location2.column()
-            && location1.filename() == location2.filename();
-}
-
-inline bool operator!=(const QmlEventLocation &location1, const QmlEventLocation &location2)
-{
-    return !(location1 == location2);
-}
-
-inline auto qHash(const QmlEventLocation &location)
-{
-    return qHash(location.filename())
-            ^ ((location.line() & 0xfff)                   // 12 bits of line number
-               | ((location.column() << 16) & 0xff0000));  // 8 bits of column
-
-}
-
-QDataStream &operator>>(QDataStream &stream, QmlEventLocation &location);
-QDataStream &operator<<(QDataStream &stream, const QmlEventLocation &location);
-
 } // namespace QmlProfiler
 
 QT_BEGIN_NAMESPACE
diff --git a/src/plugins/qmlprofiler/qmleventtype.h b/src/plugins/qmlprofiler/qmleventtype.h
index ee87dc94d2..9eb9954075 100644
--- a/src/plugins/qmlprofiler/qmleventtype.h
+++ b/src/plugins/qmlprofiler/qmleventtype.h
@@ -63,9 +63,6 @@ private:
     int m_detailType; // can be EventType, BindingType, PixmapEventType or SceneGraphFrameType
 };
 
-QDataStream &operator>>(QDataStream &stream, QmlEventType &type);
-QDataStream &operator<<(QDataStream &stream, const QmlEventType &type);
-
 } // namespace QmlProfiler
 
 Q_DECLARE_METATYPE(QmlProfiler::QmlEventType)
diff --git a/src/plugins/qmlprofiler/qmlnote.h b/src/plugins/qmlprofiler/qmlnote.h
index 1178ccaca6..919d215faf 100644
--- a/src/plugins/qmlprofiler/qmlnote.h
+++ b/src/plugins/qmlprofiler/qmlnote.h
@@ -48,10 +48,13 @@ public:
     void setText(const QString &text) { m_text = text; }
     void setLoaded(bool loaded) { m_loaded = loaded; }
 
-private:
+    friend bool operator==(const QmlNote &note1, const QmlNote &note2);
+    friend bool operator!=(const QmlNote &note1, const QmlNote &note2);
+
     friend QDataStream &operator>>(QDataStream &stream, QmlNote &note);
     friend QDataStream &operator<<(QDataStream &stream, const QmlNote &note);
 
+private:
     int m_typeIndex;
     int m_collapsedRow;
     qint64 m_startTime;
@@ -60,12 +63,6 @@ private:
     bool m_loaded;
 };
 
-bool operator==(const QmlNote &note1, const QmlNote &note2);
-bool operator!=(const QmlNote &note1, const QmlNote &note2);
-
-QDataStream &operator>>(QDataStream &stream, QmlNote &note);
-QDataStream &operator<<(QDataStream &stream, const QmlNote &note);
-
 } // namespace QmlProfiler
 
 Q_DECLARE_METATYPE(QmlProfiler::QmlNote)
diff --git a/src/plugins/qtsupport/codegensettings.h b/src/plugins/qtsupport/codegensettings.h
index a5973683a2..22187df9de 100644
--- a/src/plugins/qtsupport/codegensettings.h
+++ b/src/plugins/qtsupport/codegensettings.h
@@ -48,13 +48,13 @@ public:
     void fromSettings(const QSettings *settings);
     void toSettings(QSettings *settings) const;
 
+    friend bool operator==(const CodeGenSettings &p1, const CodeGenSettings &p2) { return p1.equals(p2); }
+    friend bool operator!=(const CodeGenSettings &p1, const CodeGenSettings &p2) { return !p1.equals(p2); }
+
     UiClassEmbedding embedding;
     bool retranslationSupport; // Add handling for language change events
     bool includeQtModule; // Include "<QtGui/[Class]>" or just "<[Class]>"
     bool addQtVersionCheck; // Include #ifdef when using "#include <QtGui/..."
 };
 
-inline bool operator==(const CodeGenSettings &p1, const CodeGenSettings &p2) { return p1.equals(p2); }
-inline bool operator!=(const CodeGenSettings &p1, const CodeGenSettings &p2) { return !p1.equals(p2); }
-
 } // namespace QtSupport
diff --git a/src/plugins/remotelinux/deploymenttimeinfo.cpp b/src/plugins/remotelinux/deploymenttimeinfo.cpp
index 81eb9417e3..eef2b77cf4 100644
--- a/src/plugins/remotelinux/deploymenttimeinfo.cpp
+++ b/src/plugins/remotelinux/deploymenttimeinfo.cpp
@@ -55,16 +55,15 @@ public:
     bool operator==(const DeployParameters &other) const {
         return file == other.file &&  host == other.host &&  sysroot == other.sysroot;
     }
+    friend auto qHash(const DeployParameters &p) {
+        return qHash(qMakePair(qMakePair(p.file, p.host), p.sysroot));
+    }
 
     DeployableFile file;
     QString host;
     QString sysroot;
 };
 
-auto qHash(const DeployParameters &p) {
-    return qHash(qMakePair(qMakePair(p.file, p.host), p.sysroot));
-}
-
 } // anonymous namespace
 
 class DeploymentTimeInfoPrivate
diff --git a/src/plugins/texteditor/behaviorsettings.h b/src/plugins/texteditor/behaviorsettings.h
index 8a9a0d5979..7acb3bf1e6 100644
--- a/src/plugins/texteditor/behaviorsettings.h
+++ b/src/plugins/texteditor/behaviorsettings.h
@@ -52,6 +52,9 @@ public:
 
     bool equals(const BehaviorSettings &bs) const;
 
+    friend bool operator==(const BehaviorSettings &t1, const BehaviorSettings &t2) { return t1.equals(t2); }
+    friend bool operator!=(const BehaviorSettings &t1, const BehaviorSettings &t2) { return !t1.equals(t2); }
+
     bool m_mouseHiding;
     bool m_mouseNavigation;
     bool m_scrollWheelZooming;
@@ -61,7 +64,4 @@ public:
     bool m_smartSelectionChanging;
 };
 
-inline bool operator==(const BehaviorSettings &t1, const BehaviorSettings &t2) { return t1.equals(t2); }
-inline bool operator!=(const BehaviorSettings &t1, const BehaviorSettings &t2) { return !t1.equals(t2); }
-
 } // namespace TextEditor
diff --git a/src/plugins/texteditor/colorscheme.h b/src/plugins/texteditor/colorscheme.h
index 22b625ec24..6548742dae 100644
--- a/src/plugins/texteditor/colorscheme.h
+++ b/src/plugins/texteditor/colorscheme.h
@@ -81,6 +81,9 @@ public:
     QString toString() const;
     bool fromString(const QString &str);
 
+    friend bool operator==(const Format &f1, const Format &f2) { return f1.equals(f2); }
+    friend bool operator!=(const Format &f1, const Format &f2) { return !f1.equals(f2); }
+
 private:
     QColor m_foreground;
     QColor m_background;
@@ -94,10 +97,6 @@ private:
     bool m_italic = false;
 };
 
-inline bool operator==(const Format &f1, const Format &f2) { return f1.equals(f2); }
-inline bool operator!=(const Format &f1, const Format &f2) { return !f1.equals(f2); }
-
-
 /*! A color scheme combines a set of formats for different highlighting
     categories. It also provides saving and loading of the scheme to a file.
  */
@@ -125,20 +124,19 @@ public:
     bool save(const QString &fileName, QWidget *parent) const;
     bool load(const QString &fileName);
 
-    inline bool equals(const ColorScheme &cs) const
+    bool equals(const ColorScheme &cs) const
     {
-        return m_formats == cs.m_formats
-                && m_displayName == cs.m_displayName;
+        return m_formats == cs.m_formats && m_displayName == cs.m_displayName;
     }
 
     static QString readNameOfScheme(const QString &fileName);
 
+    friend bool operator==(const ColorScheme &cs1, const ColorScheme &cs2) { return cs1.equals(cs2); }
+    friend bool operator!=(const ColorScheme &cs1, const ColorScheme &cs2) { return !cs1.equals(cs2); }
+
 private:
     QMap<TextStyle, Format> m_formats;
     QString m_displayName;
 };
 
-inline bool operator==(const ColorScheme &cs1, const ColorScheme &cs2) { return cs1.equals(cs2); }
-inline bool operator!=(const ColorScheme &cs1, const ColorScheme &cs2) { return !cs1.equals(cs2); }
-
 } // namespace TextEditor
diff --git a/src/plugins/texteditor/commentssettings.h b/src/plugins/texteditor/commentssettings.h
index 23a7545122..c1a20a650f 100644
--- a/src/plugins/texteditor/commentssettings.h
+++ b/src/plugins/texteditor/commentssettings.h
@@ -43,15 +43,15 @@ public:
 
     bool equals(const CommentsSettings &other) const;
 
+    friend bool operator==(const CommentsSettings &a, const CommentsSettings &b)
+    { return a.equals(b); }
+
+    friend bool operator!=(const CommentsSettings &a, const CommentsSettings &b)
+    { return !(a == b); }
+
     bool m_enableDoxygen;
     bool m_generateBrief;
     bool m_leadingAsterisks;
 };
 
-inline bool operator==(const CommentsSettings &a, const CommentsSettings &b)
-{ return a.equals(b); }
-
-inline bool operator!=(const CommentsSettings &a, const CommentsSettings &b)
-{ return !(a == b); }
-
 } // namespace TextEditor
diff --git a/src/plugins/texteditor/completionsettings.h b/src/plugins/texteditor/completionsettings.h
index fd274a42c0..fb153f85f5 100644
--- a/src/plugins/texteditor/completionsettings.h
+++ b/src/plugins/texteditor/completionsettings.h
@@ -56,6 +56,9 @@ public:
 
     bool equals(const CompletionSettings &bs) const;
 
+    friend bool operator==(const CompletionSettings &t1, const CompletionSettings &t2) { return t1.equals(t2); }
+    friend bool operator!=(const CompletionSettings &t1, const CompletionSettings &t2) { return !t1.equals(t2); }
+
     CaseSensitivity m_caseSensitivity = CaseInsensitive;
     CompletionTrigger m_completionTrigger = AutomaticCompletion;
     int m_automaticProposalTimeoutInMs = 400;
@@ -74,7 +77,4 @@ public:
     bool m_overwriteClosingChars = false;
 };
 
-inline bool operator==(const CompletionSettings &t1, const CompletionSettings &t2) { return t1.equals(t2); }
-inline bool operator!=(const CompletionSettings &t1, const CompletionSettings &t2) { return !t1.equals(t2); }
-
 } // namespace TextEditor
diff --git a/src/plugins/texteditor/displaysettings.h b/src/plugins/texteditor/displaysettings.h
index 73114e6538..ae87f76dfb 100644
--- a/src/plugins/texteditor/displaysettings.h
+++ b/src/plugins/texteditor/displaysettings.h
@@ -52,6 +52,9 @@ public:
     void toSettings(const QString &category, QSettings *s) const;
     void fromSettings(const QString &category, const QSettings *s);
 
+    friend bool operator==(const DisplaySettings &t1, const DisplaySettings &t2) { return t1.equals(t2); }
+    friend bool operator!=(const DisplaySettings &t1, const DisplaySettings &t2) { return !t1.equals(t2); }
+
     bool m_displayLineNumbers = true;
     bool m_textWrapping = false;
     bool m_visualizeWhitespace = false;
@@ -78,9 +81,6 @@ public:
     static QLabel *createAnnotationSettingsLink();
 };
 
-inline bool operator==(const DisplaySettings &t1, const DisplaySettings &t2) { return t1.equals(t2); }
-inline bool operator!=(const DisplaySettings &t1, const DisplaySettings &t2) { return !t1.equals(t2); }
-
 } // namespace TextEditor
 
 Q_DECLARE_METATYPE(TextEditor::AnnotationAlignment)
diff --git a/src/plugins/texteditor/extraencodingsettings.h b/src/plugins/texteditor/extraencodingsettings.h
index ee45b58ace..ce16ae46fc 100644
--- a/src/plugins/texteditor/extraencodingsettings.h
+++ b/src/plugins/texteditor/extraencodingsettings.h
@@ -49,6 +49,12 @@ public:
 
     bool equals(const ExtraEncodingSettings &s) const;
 
+    friend bool operator==(const ExtraEncodingSettings &a, const ExtraEncodingSettings &b)
+    { return a.equals(b); }
+
+    friend bool operator!=(const ExtraEncodingSettings &a, const ExtraEncodingSettings &b)
+    { return !a.equals(b); }
+
     static QStringList lineTerminationModeNames();
 
     enum Utf8BomSetting {
@@ -59,10 +65,4 @@ public:
     Utf8BomSetting m_utf8BomSetting;
 };
 
-inline bool operator==(const ExtraEncodingSettings &a, const ExtraEncodingSettings &b)
-{ return a.equals(b); }
-
-inline bool operator!=(const ExtraEncodingSettings &a, const ExtraEncodingSettings &b)
-{ return !a.equals(b); }
-
 } // TextEditor
diff --git a/src/plugins/texteditor/fontsettings.h b/src/plugins/texteditor/fontsettings.h
index 9447141434..e476951eac 100644
--- a/src/plugins/texteditor/fontsettings.h
+++ b/src/plugins/texteditor/fontsettings.h
@@ -98,6 +98,9 @@ public:
 
     static QString defaultSchemeFileName(const QString &fileName = QString());
 
+    friend bool operator==(const FontSettings &f1, const FontSettings &f2) { return f1.equals(f2); }
+    friend bool operator!=(const FontSettings &f1, const FontSettings &f2) { return !f1.equals(f2); }
+
 private:
     void addMixinStyle(QTextCharFormat &textCharFormat, const MixinTextStyles &mixinStyles) const;
 
@@ -112,7 +115,4 @@ private:
     mutable QHash<TextStyles, QTextCharFormat> m_textCharFormatCache;
 };
 
-inline bool operator==(const FontSettings &f1, const FontSettings &f2) { return f1.equals(f2); }
-inline bool operator!=(const FontSettings &f1, const FontSettings &f2) { return !f1.equals(f2); }
-
 } // namespace TextEditor
diff --git a/src/plugins/texteditor/marginsettings.h b/src/plugins/texteditor/marginsettings.h
index e7f6d3bac6..d9c5eeed7f 100644
--- a/src/plugins/texteditor/marginsettings.h
+++ b/src/plugins/texteditor/marginsettings.h
@@ -48,14 +48,14 @@ public:
 
     bool equals(const MarginSettings &other) const;
 
+    friend bool operator==(const MarginSettings &one, const MarginSettings &two)
+    { return one.equals(two); }
+    friend bool operator!=(const MarginSettings &one, const MarginSettings &two)
+    { return !one.equals(two); }
+
     bool m_showMargin;
     bool m_useIndenter;
     int m_marginColumn;
 };
 
-inline bool operator==(const MarginSettings &one, const MarginSettings &two)
-{ return one.equals(two); }
-inline bool operator!=(const MarginSettings &one, const MarginSettings &two)
-{ return !one.equals(two); }
-
 } // namespace TextEditor
diff --git a/src/plugins/texteditor/snippets/snippetssettings.h b/src/plugins/texteditor/snippets/snippetssettings.h
index 88df3ad0e8..f8e27ee11e 100644
--- a/src/plugins/texteditor/snippets/snippetssettings.h
+++ b/src/plugins/texteditor/snippets/snippetssettings.h
@@ -46,14 +46,13 @@ public:
 
     bool equals(const SnippetsSettings &snippetsSettings) const;
 
+    friend bool operator==(const SnippetsSettings &a, const SnippetsSettings &b)
+    { return a.equals(b); }
+    friend bool operator!=(const SnippetsSettings &a, const SnippetsSettings &b)
+    { return !a.equals(b); }
+
 private:
     QString m_lastUsedSnippetGroup;
 };
 
-inline bool operator==(const SnippetsSettings &a, const SnippetsSettings &b)
-{ return a.equals(b); }
-
-inline bool operator!=(const SnippetsSettings &a, const SnippetsSettings &b)
-{ return !a.equals(b); }
-
 } // TextEditor
diff --git a/src/plugins/texteditor/storagesettings.h b/src/plugins/texteditor/storagesettings.h
index 70dc5b784b..6755dffa67 100644
--- a/src/plugins/texteditor/storagesettings.h
+++ b/src/plugins/texteditor/storagesettings.h
@@ -50,6 +50,10 @@ public:
     bool removeTrailingWhitespace(const QString &filePattern) const;
 
     bool equals(const StorageSettings &ts) const;
+    friend bool operator==(const StorageSettings &t1, const StorageSettings &t2)
+    { return t1.equals(t2); }
+    friend bool operator!=(const StorageSettings &t1, const StorageSettings &t2)
+    { return !t1.equals(t2); }
 
     QString m_ignoreFileTypes;
     bool m_cleanWhitespace;
@@ -59,7 +63,4 @@ public:
     bool m_skipTrailingWhitespace;
 };
 
-inline bool operator==(const StorageSettings &t1, const StorageSettings &t2) { return t1.equals(t2); }
-inline bool operator!=(const StorageSettings &t1, const StorageSettings &t2) { return !t1.equals(t2); }
-
 } // namespace TextEditor
diff --git a/src/plugins/texteditor/tabsettings.h b/src/plugins/texteditor/tabsettings.h
index 731dd75caf..274dd44576 100644
--- a/src/plugins/texteditor/tabsettings.h
+++ b/src/plugins/texteditor/tabsettings.h
@@ -81,6 +81,9 @@ public:
     bool isIndentationClean(const QTextBlock &block, const int indent) const;
     bool guessSpacesForTabs(const QTextBlock &block) const;
 
+    friend bool operator==(const TabSettings &t1, const TabSettings &t2) { return t1.equals(t2); }
+    friend bool operator!=(const TabSettings &t1, const TabSettings &t2) { return !t1.equals(t2); }
+
     static int firstNonSpace(const QString &text);
     static inline bool onlySpace(const QString &text) { return firstNonSpace(text) == text.length(); }
     static int spacesLeftFromPosition(const QString &text, int position);
@@ -96,9 +99,6 @@ public:
     bool equals(const TabSettings &ts) const;
 };
 
-inline bool operator==(const TabSettings &t1, const TabSettings &t2) { return t1.equals(t2); }
-inline bool operator!=(const TabSettings &t1, const TabSettings &t2) { return !t1.equals(t2); }
-
 } // namespace TextEditor
 
 Q_DECLARE_METATYPE(TextEditor::TabSettings)
diff --git a/src/plugins/texteditor/textdocumentlayout.h b/src/plugins/texteditor/textdocumentlayout.h
index ce86ad4296..5b8a0447c2 100644
--- a/src/plugins/texteditor/textdocumentlayout.h
+++ b/src/plugins/texteditor/textdocumentlayout.h
@@ -43,9 +43,11 @@ struct TEXTEDITOR_EXPORT Parenthesis
 {
     enum Type : char { Opened, Closed };
 
-    inline Parenthesis() = default;
-    inline Parenthesis(Type t, QChar c, int position)
-        : pos(position), chr(c), type(t) {}
+    Parenthesis() = default;
+    Parenthesis(Type t, QChar c, int position) : pos(position), chr(c), type(t) {}
+
+    friend TEXTEDITOR_EXPORT QDebug operator<<(QDebug debug, const Parenthesis &parenthesis);
+
     int pos = -1;
     QChar chr;
     Utils::Id source;
@@ -56,8 +58,6 @@ struct TEXTEDITOR_EXPORT Parenthesis
 using Parentheses = QVector<Parenthesis>;
 TEXTEDITOR_EXPORT void insertSorted(Parentheses &list, const Parenthesis &elem);
 
-TEXTEDITOR_EXPORT QDebug operator<<(QDebug debug, const Parenthesis &parenthesis);
-
 class TEXTEDITOR_EXPORT CodeFormatterData
 {
 public:
diff --git a/src/plugins/texteditor/typingsettings.h b/src/plugins/texteditor/typingsettings.h
index 39254b14a8..2a023d39fa 100644
--- a/src/plugins/texteditor/typingsettings.h
+++ b/src/plugins/texteditor/typingsettings.h
@@ -66,6 +66,9 @@ public:
 
     bool equals(const TypingSettings &ts) const;
 
+    friend bool operator==(const TypingSettings &t1, const TypingSettings &t2) { return t1.equals(t2); }
+    friend bool operator!=(const TypingSettings &t1, const TypingSettings &t2) { return !t1.equals(t2); }
+
     bool m_autoIndent;
     TabKeyBehavior m_tabKeyBehavior;
     SmartBackspaceBehavior m_smartBackspaceBehavior;
@@ -73,9 +76,6 @@ public:
     bool m_preferSingleLineComments;
 };
 
-inline bool operator==(const TypingSettings &t1, const TypingSettings &t2) { return t1.equals(t2); }
-inline bool operator!=(const TypingSettings &t1, const TypingSettings &t2) { return !t1.equals(t2); }
-
 } // namespace TextEditor
 
 Q_DECLARE_METATYPE(TextEditor::TypingSettings)
diff --git a/src/plugins/vcsbase/commonvcssettings.h b/src/plugins/vcsbase/commonvcssettings.h
index fdcafb0f49..975e2c6060 100644
--- a/src/plugins/vcsbase/commonvcssettings.h
+++ b/src/plugins/vcsbase/commonvcssettings.h
@@ -40,6 +40,8 @@ class CommonVcsSettings : public Utils::AspectContainer
 public:
     CommonVcsSettings();
 
+    friend QDebug operator<<(QDebug, const CommonVcsSettings &);
+
     Utils::StringAspect nickNameMailMap;
     Utils::StringAspect nickNameFieldListFile;
 
@@ -52,9 +54,6 @@ public:
     Utils::IntegerAspect lineWrapWidth;
 };
 
-
-QDebug operator<<(QDebug, const CommonVcsSettings &);
-
 class CommonOptionsPage final : public Core::IOptionsPage
 {
     Q_OBJECT
diff --git a/src/plugins/vcsbase/vcsbaseplugin.h b/src/plugins/vcsbase/vcsbaseplugin.h
index 461b902c12..03f70603df 100644
--- a/src/plugins/vcsbase/vcsbaseplugin.h
+++ b/src/plugins/vcsbase/vcsbaseplugin.h
@@ -106,6 +106,11 @@ public:
 
     friend VCSBASE_EXPORT QDebug operator<<(QDebug in, const VcsBasePluginState &state);
 
+    friend bool operator==(const VcsBasePluginState &s1, const VcsBasePluginState &s2)
+    { return s1.equals(s2); }
+    friend bool operator!=(const VcsBasePluginState &s1, const VcsBasePluginState &s2)
+    { return !s1.equals(s2); }
+
 private:
     friend class VcsBasePluginPrivate;
     bool equals(const Internal::State &s) const;
@@ -114,13 +119,6 @@ private:
     QSharedDataPointer<VcsBasePluginStateData> data;
 };
 
-VCSBASE_EXPORT QDebug operator<<(QDebug in, const VcsBasePluginState &state);
-
-inline bool operator==(const VcsBasePluginState &s1, const VcsBasePluginState &s2)
-{ return s1.equals(s2); }
-inline bool operator!=(const VcsBasePluginState &s1, const VcsBasePluginState &s2)
-{ return !s1.equals(s2); }
-
 // Convenience that searches for the repository specifically for version control
 // systems that do not have directories like "CVS" in each managed subdirectory
 // but have a directory at the top of the repository like ".git" containing