fix: resolve recursive alias error in Value formatter (#1)

Introduce a private helper function to handle formatting of nested Value
types. This change prevents MSVC C2968 "recursive alias declaration"
errors caused by recursive type mapping when using fmt::join or direct
formatting of nested containers.

Author: tonytranrp

include/rift/value.hpp

@@ -264,37 +264,51 @@ struct fmt::formatter<rift::Value> {
         return ctx.begin();
     }
 
-    template <typename FormatContext>
-    auto format(rift::Value const& value, FormatContext& ctx) const noexcept {
+private:
+    // Helper to format a Value without triggering recursive type mapping.
+    // This avoids MSVC C2968 "recursive alias declaration" errors.
+    template <typename OutputIt>
+    OutputIt format_value(rift::Value const& value, OutputIt out) const noexcept {
         switch (value.type()) {
             case rift::Value::Type::String:
-                return fmt::format_to(ctx.out(), "{}", value.getString());
+                return fmt::format_to(out, "{}", value.getString());
             case rift::Value::Type::Integer:
-                return fmt::format_to(ctx.out(), "{}", value.getInteger());
+                return fmt::format_to(out, "{}", value.getInteger());
             case rift::Value::Type::Float:
-                return fmt::format_to(ctx.out(), "{:.2f}", value.getFloat());
+                return fmt::format_to(out, "{:.2f}", value.getFloat());
             case rift::Value::Type::Boolean:
-                return fmt::format_to(ctx.out(), "{}", value.getBoolean() ? "true" : "false");
+                return fmt::format_to(out, "{}", value.getBoolean() ? "true" : "false");
             case rift::Value::Type::Array: {
-                return fmt::format_to(ctx.out(), "[{}]", fmt::join(value.getArray(), ", "));;
+                auto& arr = value.getArray();
+                out = fmt::format_to(out, "[");
+                for (size_t i = 0; i < arr.size(); ++i) {
+                    if (i > 0) out = fmt::format_to(out, ", ");
+                    out = format_value(arr[i], out);
+                }
+                return fmt::format_to(out, "]");
             }
             case rift::Value::Type::Object: {
                 auto& obj = value.getObject();
+                out = fmt::format_to(out, "{{");
                 size_t i = 0;
-                auto count = obj.size();
-                fmt::format_to(ctx.out(), "{{");
                 for (auto const& [key, val] : obj) {
-                    fmt::format_to(ctx.out(), "{}: {}", key, val);
-                    if (i < count - 1) {
-                        fmt::format_to(ctx.out(), ", ");
-                    }
+                    if (i > 0) out = fmt::format_to(out, ", ");
+                    out = fmt::format_to(out, "{}: ", key);
+                    out = format_value(val, out);
+                    ++i;
                 }
-                return fmt::format_to(ctx.out(), "}}");
+                return fmt::format_to(out, "}}");
             }
             default:
-                return fmt::format_to(ctx.out(), "null");
+                return fmt::format_to(out, "null");
         }
     }
+
+public:
+    template <typename FormatContext>
+    auto format(rift::Value const& value, FormatContext& ctx) const noexcept {
+        return format_value(value, ctx.out());
+    }
 };
 
 #endif // RIFT_VALUE_HPP