used using enum everywhere

Excluding the ColumnType because it have a lot of names which can
collide (it needs more work).

Excluding the IncrementOrDecrement in Model as using enum can't name
dependent type.
See: https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1099r5.html

include/orm/tiny/concerns/buildssoftdeletes.hpp

@@ -77,17 +77,13 @@ namespace Concerns
         /*! Restore all trashed models (call update on deleted_at column, set to null). */
         std::tuple<int, TSqlQuery> restore();
 
-        /*! Alias for the WithoutTrashed constraint. */
-        constexpr static auto WithoutTrashed = TrashedType::WITHOUT_TRASHED;
-        /*! Alias for the WithTrashed constraint. */
-        constexpr static auto WithTrashed = TrashedType::WITH_TRASHED;
-        /*! Alias for the OnlyTrashed constraint. */
-        constexpr static auto OnlyTrashed = TrashedType::ONLY_TRASHED;
-
         /*! Get the currently applied soft deletes constraint on the TinyBuilder. */
         inline TrashedType currentSoftDeletes() const noexcept;
 
     protected:
+        /*! Expose the TrashedType enum. */
+        using enum TrashedType;
+
         /*! Get the "deleted at" column for the builder (fully qualified if joins
             are defined). */
         QString getDeletedAtColumn(Builder<Model> &builder) const;
@@ -96,7 +92,7 @@ namespace Concerns
         Builder<Model> &applySoftDeletes();
 
         /*! Stores the currently applied soft deletes constraint on the TinyBuilder. */
-        TrashedType m_trashed = WithoutTrashed;
+        TrashedType m_trashed = WITHOUT_TRASHED;
         /*! Is the default soft deletes constraint on the TinyBuilder enabled? */
         bool m_withSoftDeletes = false;
 
@@ -162,7 +158,7 @@ namespace Concerns
     Builder<Model> &
     BuildsSoftDeletes<Model, T>::withoutTrashed()
     {
-        m_trashed = WithoutTrashed;
+        m_trashed = WITHOUT_TRASHED;
 
         /* Disable the default soft deletes constraint on the TinyBuilder because
            manually overridden and we are applying another whereNull clause here. */
@@ -182,7 +178,7 @@ namespace Concerns
         if (!withTrashed)
             return withoutTrashed();
 
-        m_trashed = WithTrashed;
+        m_trashed = WITH_TRASHED;
 
         // Disable the default soft deletes constraint on the TinyBuilder (withoutTrashed)
         disableSoftDeletes();
@@ -194,7 +190,7 @@ namespace Concerns
     Builder<Model> &
     BuildsSoftDeletes<Model, T>::onlyTrashed()
     {
-        m_trashed = OnlyTrashed;
+        m_trashed = ONLY_TRASHED;
 
         /* Disable the default soft deletes constraint on the TinyBuilder because
            manually overridden and we are applying another whereNotNull clause here. */

include/orm/tiny/model.hpp

@@ -423,13 +423,17 @@ namespace Orm::Tiny
         /*! Method to call in the incrementOrDecrement(). */
         enum struct IncrementOrDecrement : quint8
         {
+            /*! Call the increment() method. */
             INCREMENT,
+            /*! Call the decrement() method. */
             DECREMENT,
         };
         /*! Call the increment() method. */
         constexpr static auto Increment = IncrementOrDecrement::INCREMENT;
         /*! Call the decrement() method. */
         constexpr static auto Decrement = IncrementOrDecrement::DECREMENT;
+        /* Don't use using enum here as it can't name dependent type.
+           See: https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1099r5.html */
 
         /*! Run the increment or decrement method on the model. */
         template<typename T> requires std::is_arithmetic_v<T>

tom/include/tom/application.hpp

@@ -179,12 +179,8 @@ namespace Concerns
             /*! Show a command not defined error wall. */
             ShowErrorWall,
         };
-        /*! Show all commands list using the list command. */
-        constexpr static CommandNotFound
-        ShowCommandsList = CommandNotFound::ShowCommandsList;
-        /*! Show a command not defined error wall. */
-        constexpr static CommandNotFound
-        ShowErrorWall    = CommandNotFound::ShowErrorWall;
+        /*! Expose the CommandNotFound enum. */
+        using enum CommandNotFound;
 
         /*! Get the command name including the guess command name logic. */
         QString getCommandName(const QString &name, CommandNotFound notFound);

tom/include/tom/commands/completecommand.hpp

@@ -81,18 +81,20 @@ namespace Tom::Commands
         getCommandOptionsSignature(const std::optional<QString> &command) const;
 
         /*! Option type (long/short). */
-        enum struct OptionType : qint8
+        enum struct OptionType : quint8
         {
-            UNDEFINED = -1,
+            /*! Consider both long and short option arguments. */
+            ANY,
+            /*! Long option argument. */
             LONG,
+            /*! Short option argument. */
             SHORT,
         };
-        constexpr static auto UNDEFINED = OptionType::UNDEFINED;
-        constexpr static auto LONG      = OptionType::LONG;
-        constexpr static auto SHORT     = OptionType::SHORT;
+        /*! Expose the OptionType enum. */
+        using enum OptionType;
 
         /*! Determine whether the given word is an option argument. */
-        static bool isOptionArgument(const QString &wordArg, OptionType type = UNDEFINED);
+        static bool isOptionArgument(const QString &wordArg, OptionType type = ANY);
         /*! Determine whether the given word is a long option argument. */
         inline static bool isLongOption(const QString &wordArg);
         /*! Determine whether the given word is a short option argument. */

tom/include/tom/concerns/interactswithio.hpp

@@ -78,22 +78,19 @@ namespace Concerns
         /*! Verbosity levels. */
         enum struct Verbosity : quint8
         {
+            /*! Quiet verbosity. */
             Quiet       = 0x0001,
+            /*! Normal verbosity (default). */
             Normal      = 0x0002,
+            /*! Verbose verbosity. */
             Verbose     = 0x0004,
+            /*! Very verbose verbosity. */
             VeryVerbose = 0x0008,
+            /*! Debug verbosity. */
             Debug       = 0x0010,
         };
-        /*! Quiet verbosity. */
-        constexpr static Verbosity Quiet       = Verbosity::Quiet;
-        /*! Normal verbosity (default). */
-        constexpr static Verbosity Normal      = Verbosity::Normal;
-        /*! Verbose verbosity. */
-        constexpr static Verbosity Verbose     = Verbosity::Verbose;
-        /*! Very verbose verbosity. */
-        constexpr static Verbosity VeryVerbose = Verbosity::VeryVerbose;
-        /*! Debug verbosity. */
-        constexpr static Verbosity Debug       = Verbosity::Debug;
+        /*! Expose the Verbosity enum. */
+        using enum Verbosity;
 
         /*! Write a string as standard output. */
         const InteractsWithIO &line(const QString &string, bool newline = true,

tom/src/tom/commands/completecommand.cpp

@@ -666,7 +666,8 @@ bool CompleteCommand::isOptionArgument(const QString &wordArg, const OptionType
     const auto isLong = wordArg.startsWith(DoubleDash);
     const auto isShort = isLong ? false : wordArg.startsWith(DASH);
 
-    if (type == UNDEFINED)
+    // Consider both long and short option arguments
+    if (type == ANY)
         return isLong || isShort;
 
     if (type == LONG)