Merge pull request #22096 from vespa-engine/toregge/change-multivalue-value-from-class-to-using-statementv7.573.29

Change search::multivalue::Value from class to using statement.

3 files changed, 11 insertions, 35 deletions

diff --git a/searchcommon/src/vespa/searchcommon/attribute/multi_value_traits.h b/searchcommon/src/vespa/searchcommon/attribute/multi_value_traits.h
index fcb3f1bd33a..f03b031f991 100644
--- a/searchcommon/src/vespa/searchcommon/attribute/multi_value_traits.h
+++ b/searchcommon/src/vespa/searchcommon/attribute/multi_value_traits.h
@@ -6,17 +6,13 @@
 
 namespace search::multivalue {
 
-template <typename T> class Value;
 template <typename T> class WeightedValue;
 
 /*
  * Check for the presence of a weight.
  */
 template <typename T>
-struct is_WeightedValue;
-
-template <typename T>
-struct is_WeightedValue<Value<T>> : std::false_type {};
+struct is_WeightedValue : std::false_type {};
 
 template <typename T>
 struct is_WeightedValue<WeightedValue<T>> : std::true_type {};
@@ -28,10 +24,7 @@ inline constexpr bool is_WeightedValue_v = is_WeightedValue<T>::value;
  * Extract inner type.
  */
 template <typename T>
-struct ValueType;
-
-template <typename T>
-struct ValueType<Value<T>> { using type = T; };
+struct ValueType { using type = T; };
 
 template <typename T>
 struct ValueType<WeightedValue<T>> { using type = T; };
diff --git a/searchcommon/src/vespa/searchcommon/attribute/multivalue.h b/searchcommon/src/vespa/searchcommon/attribute/multivalue.h
index 091bf78a4dd..7cb411fd840 100644
--- a/searchcommon/src/vespa/searchcommon/attribute/multivalue.h
+++ b/searchcommon/src/vespa/searchcommon/attribute/multivalue.h
@@ -7,21 +7,7 @@
 namespace search::multivalue {
 
 template <typename T>
-class Value {
-public:
-    Value() noexcept : _v() {}
-    Value(T v) noexcept : _v(v) { }
-    T value()            const noexcept { return _v; }
-    const T& value_ref() const noexcept { return _v; }
-    T& value_ref()             noexcept { return _v; }
-    operator T ()        const noexcept { return _v; }
-    operator T & ()            noexcept { return _v; }
-    bool operator ==(const Value<T> & rhs) const { return _v == rhs._v; }
-    bool operator <(const Value<T> & rhs) const { return _v < rhs._v; }
-    bool operator >(const Value<T> & rhs) const { return _v > rhs._v; }
-private:
-    T _v;
-};
+using Value = T;
 
 template <typename T>
 class WeightedValue {
@@ -44,36 +30,33 @@ private:
 };
 
 template <typename T>
-inline int32_t get_weight(const Value<T>&) noexcept { return 1; }
+inline int32_t get_weight(const T&) noexcept { return 1; }
 
 template <typename T>
 inline int32_t get_weight(const WeightedValue<T>& value) noexcept { return value.weight(); }
 
 template <typename T>
-inline T get_value(const Value<T> &value) noexcept { return value.value(); }
+inline T get_value(const T& value) noexcept { return value; }
 
 template <typename T>
 inline T get_value(const WeightedValue<T>& value) noexcept { return value.value(); }
 
 template <typename T>
-inline const T& get_value_ref(const Value<T> &value) noexcept { return value.value_ref(); }
+inline const T& get_value_ref(const T& value) noexcept { return value; }
 
 template <typename T>
 inline const T& get_value_ref(const WeightedValue<T>& value) noexcept { return value.value_ref(); }
 
 template <typename T>
-inline T& get_value_ref(Value<T> &value) noexcept { return value.value_ref(); }
+inline T& get_value_ref(T& value) noexcept { return value; }
 
 template <typename T>
 inline T& get_value_ref(WeightedValue<T>& value) noexcept { return value.value_ref(); }
 
 template <typename M>
-struct ValueBuilder;
-
-template <typename T>
-struct ValueBuilder<Value<T>>
+struct ValueBuilder
 {
-    static Value<T> build(T value, int32_t) noexcept { return Value<T>(value); }
+    static M build(M value, int32_t) noexcept { return value; }
 };
 
 template <typename T>
diff --git a/searchlib/src/vespa/searchlib/features/dotproductfeature.cpp b/searchlib/src/vespa/searchlib/features/dotproductfeature.cpp
index 008c9e8b54b..3cef5d06043 100644
--- a/searchlib/src/vespa/searchlib/features/dotproductfeature.cpp
+++ b/searchlib/src/vespa/searchlib/features/dotproductfeature.cpp
@@ -402,8 +402,8 @@ DotProductByContentFillExecutor<BaseType>::~DotProductByContentFillExecutor() =
 
 namespace {
 
-template<typename T> struct IsNonWeightedType : std::false_type {};
-template<typename BaseType> struct IsNonWeightedType<multivalue::Value<BaseType>> : std::true_type {};
+template<typename T> struct IsNonWeightedType : std::true_type {};
+template<typename BaseType> struct IsNonWeightedType<multivalue::WeightedValue<BaseType>> : std::false_type {};
 
 // Compile-time sanity check for type compatibility of gnarly BaseType <-> multivalue::Value
 // reinterpret_cast used by some getAttributeValues calls.