diff --git a/src/generic/implementation_simdjson_result_base.h b/src/generic/implementation_simdjson_result_base.h
index 7c2cf4a25..9365b02ac 100644
--- a/src/generic/implementation_simdjson_result_base.h
+++ b/src/generic/implementation_simdjson_result_base.h
@@ -47,6 +47,16 @@ struct implementation_simdjson_result_base {
    */
   simdjson_really_inline implementation_simdjson_result_base(T &&value, error_code error) noexcept;
 
+  /**
+   * Move a result.
+   */
+  simdjson_really_inline implementation_simdjson_result_base(implementation_simdjson_result_base<T> &&value) noexcept = default;
+
+  /**
+   * Copy a result.
+   */
+  simdjson_really_inline implementation_simdjson_result_base(const implementation_simdjson_result_base<T> &value) = default;
+
   /**
    * Create a new empty result with error = UNINITIALIZED.
    */
diff --git a/src/generic/ondemand/array.h b/src/generic/ondemand/array.h
index 22f0c37dd..59bb3090c 100644
--- a/src/generic/ondemand/array.h
+++ b/src/generic/ondemand/array.h
@@ -70,6 +70,9 @@ struct simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array> : public SIMDJS
 public:
   simdjson_really_inline simdjson_result(SIMDJSON_IMPLEMENTATION::ondemand::array &&value) noexcept; ///< @private
   simdjson_really_inline simdjson_result(error_code error) noexcept; ///< @private
+
+  simdjson_really_inline simdjson_result() noexcept = default;
+  simdjson_really_inline simdjson_result(simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array> &&a) noexcept = default;
   simdjson_really_inline ~simdjson_result() noexcept = default; ///< @private
 
   simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array_iterator> begin() & noexcept;
diff --git a/src/generic/ondemand/array_iterator-inl.h b/src/generic/ondemand/array_iterator-inl.h
index 579b9ccaf..1bdf2a691 100644
--- a/src/generic/ondemand/array_iterator-inl.h
+++ b/src/generic/ondemand/array_iterator-inl.h
@@ -27,11 +27,6 @@ simdjson_really_inline array_iterator &array_iterator::operator++() noexcept {
 
 namespace simdjson {
 
-simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array_iterator>::simdjson_result() noexcept
-  : implementation_simdjson_result_base<SIMDJSON_IMPLEMENTATION::ondemand::array_iterator>({}, SUCCESS)
-{
-}
-
 simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array_iterator>::simdjson_result(
   SIMDJSON_IMPLEMENTATION::ondemand::array_iterator &&value
 ) noexcept
@@ -43,21 +38,6 @@ simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array_
 {
 }
 
-simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array_iterator>::simdjson_result(
-  const simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array_iterator> &a
-) noexcept
-  : implementation_simdjson_result_base<SIMDJSON_IMPLEMENTATION::ondemand::array_iterator>(a)
-{
-}
-
-simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array_iterator> &simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array_iterator>::operator=(
-  const simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array_iterator> &a
-) noexcept {
-  first = a.first;
-  second = a.second;
-  return *this;
-}
-
 simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array_iterator>::operator*() noexcept {
   if (error()) { second = SUCCESS; return error(); }
   return *first;
diff --git a/src/generic/ondemand/array_iterator.h b/src/generic/ondemand/array_iterator.h
index 3153883b2..973679a48 100644
--- a/src/generic/ondemand/array_iterator.h
+++ b/src/generic/ondemand/array_iterator.h
@@ -56,11 +56,11 @@ namespace simdjson {
 template<>
 struct simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array_iterator> : public SIMDJSON_IMPLEMENTATION::implementation_simdjson_result_base<SIMDJSON_IMPLEMENTATION::ondemand::array_iterator> {
 public:
-  simdjson_really_inline simdjson_result() noexcept;
   simdjson_really_inline simdjson_result(SIMDJSON_IMPLEMENTATION::ondemand::array_iterator &&value) noexcept; ///< @private
   simdjson_really_inline simdjson_result(error_code error) noexcept; ///< @private
-  simdjson_really_inline simdjson_result(const simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array_iterator> &a) noexcept;
-  simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array_iterator> &operator=(const simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array_iterator> &a) noexcept;
+
+  simdjson_really_inline simdjson_result() noexcept = default;
+  simdjson_really_inline simdjson_result(simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array_iterator> &&a) noexcept = default;
   simdjson_really_inline ~simdjson_result() noexcept = default; ///< @private
 
   //
diff --git a/src/generic/ondemand/document.h b/src/generic/ondemand/document.h
index 5faba4e7f..52043f81e 100644
--- a/src/generic/ondemand/document.h
+++ b/src/generic/ondemand/document.h
@@ -92,6 +92,9 @@ struct simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::document> : public SIM
 public:
   simdjson_really_inline simdjson_result(SIMDJSON_IMPLEMENTATION::ondemand::document &&value) noexcept; ///< @private
   simdjson_really_inline simdjson_result(error_code error) noexcept; ///< @private
+
+  simdjson_really_inline simdjson_result() noexcept = default;
+  simdjson_really_inline simdjson_result(simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::document> &&a) noexcept = default;
   simdjson_really_inline ~simdjson_result() noexcept = default; ///< @private
 
   simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array> get_array() & noexcept;
diff --git a/src/generic/ondemand/field-inl.h b/src/generic/ondemand/field-inl.h
index f5453f8c8..edf9e95b8 100644
--- a/src/generic/ondemand/field-inl.h
+++ b/src/generic/ondemand/field-inl.h
@@ -55,7 +55,8 @@ simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::raw_js
   return first.key();
 }
 simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::field>::value() noexcept {
-  return { std::move(first.value()), error() };
+  if (error()) { return error(); }
+  return std::move(first.value());
 }
 
 } // namespace simdjson
diff --git a/src/generic/ondemand/field.h b/src/generic/ondemand/field.h
index 7c11687b0..cdf7da286 100644
--- a/src/generic/ondemand/field.h
+++ b/src/generic/ondemand/field.h
@@ -36,6 +36,9 @@ struct simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::field> : public SIMDJS
 public:
   simdjson_really_inline simdjson_result(SIMDJSON_IMPLEMENTATION::ondemand::field &&value) noexcept; ///< @private
   simdjson_really_inline simdjson_result(error_code error) noexcept; ///< @private
+
+  simdjson_really_inline simdjson_result() noexcept = default;
+  simdjson_really_inline simdjson_result(simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::field> &&a) noexcept = default;
   simdjson_really_inline ~simdjson_result() noexcept = default; ///< @private
 
   simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::raw_json_string> key() noexcept;
diff --git a/src/generic/ondemand/json_iterator.h b/src/generic/ondemand/json_iterator.h
index 165f9ce45..1c7088fb1 100644
--- a/src/generic/ondemand/json_iterator.h
+++ b/src/generic/ondemand/json_iterator.h
@@ -193,6 +193,9 @@ struct simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::json_iterator> : publi
 public:
   simdjson_really_inline simdjson_result(SIMDJSON_IMPLEMENTATION::ondemand::json_iterator &&value) noexcept; ///< @private
   simdjson_really_inline simdjson_result(error_code error) noexcept; ///< @private
+
+  simdjson_really_inline simdjson_result() noexcept = default;
+  simdjson_really_inline simdjson_result(simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::json_iterator> &&a) noexcept = default;
   simdjson_really_inline ~simdjson_result() noexcept = default; ///< @private
 };
 
@@ -201,6 +204,9 @@ struct simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::json_iterator_ref> : p
 public:
   simdjson_really_inline simdjson_result(SIMDJSON_IMPLEMENTATION::ondemand::json_iterator_ref &&value) noexcept; ///< @private
   simdjson_really_inline simdjson_result(error_code error) noexcept; ///< @private
+
+  simdjson_really_inline simdjson_result() noexcept = default;
+  simdjson_really_inline simdjson_result(simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::json_iterator_ref> &&a) noexcept = default;
   simdjson_really_inline ~simdjson_result() noexcept = default; ///< @private
 };
 
diff --git a/src/generic/ondemand/object.h b/src/generic/ondemand/object.h
index 593154dcb..da5eae520 100644
--- a/src/generic/ondemand/object.h
+++ b/src/generic/ondemand/object.h
@@ -73,6 +73,9 @@ struct simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object> : public SIMDJ
 public:
   simdjson_really_inline simdjson_result(SIMDJSON_IMPLEMENTATION::ondemand::object &&value) noexcept; ///< @private
   simdjson_really_inline simdjson_result(error_code error) noexcept; ///< @private
+
+  simdjson_really_inline simdjson_result() noexcept = default;
+  simdjson_really_inline simdjson_result(simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object> &&a) noexcept = default;
   simdjson_really_inline ~simdjson_result() noexcept = default; ///< @private
 
   simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator> begin() noexcept;
diff --git a/src/generic/ondemand/object_iterator-inl.h b/src/generic/ondemand/object_iterator-inl.h
index 4f2d67c54..e6fb76a96 100644
--- a/src/generic/ondemand/object_iterator-inl.h
+++ b/src/generic/ondemand/object_iterator-inl.h
@@ -32,11 +32,6 @@ simdjson_really_inline object_iterator &object_iterator::operator++() noexcept {
 
 namespace simdjson {
 
-simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator>::simdjson_result() noexcept
-  : implementation_simdjson_result_base<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator>({}, SUCCESS)
-{
-}
-
 simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator>::simdjson_result(
   SIMDJSON_IMPLEMENTATION::ondemand::object_iterator &&value
 ) noexcept
@@ -48,21 +43,6 @@ simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object
 {
 }
 
-simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator>::simdjson_result(
-  const simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator> &o
-) noexcept
-  : implementation_simdjson_result_base<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator>(o)
-{
-}
-
-simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator> &simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator>::operator=(
-  const simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator> &o
-) noexcept {
-  first = o.first;
-  second = o.second;
-  return *this;
-}
-
 simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::field> simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator>::operator*() noexcept {
   if (error()) { second = SUCCESS; return error(); }
   return *first;
diff --git a/src/generic/ondemand/object_iterator.h b/src/generic/ondemand/object_iterator.h
index 07c4577ea..1c7c81971 100644
--- a/src/generic/ondemand/object_iterator.h
+++ b/src/generic/ondemand/object_iterator.h
@@ -50,11 +50,11 @@ namespace simdjson {
 template<>
 struct simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator> : public SIMDJSON_IMPLEMENTATION::implementation_simdjson_result_base<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator> {
 public:
-  simdjson_really_inline simdjson_result() noexcept;
   simdjson_really_inline simdjson_result(SIMDJSON_IMPLEMENTATION::ondemand::object_iterator &&value) noexcept; ///< @private
   simdjson_really_inline simdjson_result(error_code error) noexcept; ///< @private
-  simdjson_really_inline simdjson_result(const simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator> &a) noexcept;
-  simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator> &operator=(const simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator> &a) noexcept;
+
+  simdjson_really_inline simdjson_result() noexcept = default;
+  simdjson_really_inline simdjson_result(simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator> &&a) noexcept = default;
   simdjson_really_inline ~simdjson_result() noexcept = default; ///< @private
 
   //
diff --git a/src/generic/ondemand/parser.h b/src/generic/ondemand/parser.h
index 4bc548cb3..39f6f2e60 100644
--- a/src/generic/ondemand/parser.h
+++ b/src/generic/ondemand/parser.h
@@ -45,6 +45,9 @@ struct simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::parser> : public SIMDJ
 public:
   simdjson_really_inline simdjson_result(SIMDJSON_IMPLEMENTATION::ondemand::parser &&value) noexcept; ///< @private
   simdjson_really_inline simdjson_result(error_code error) noexcept; ///< @private
+
+  simdjson_really_inline simdjson_result() noexcept = default;
+  simdjson_really_inline simdjson_result(simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::parser> &&a) noexcept = default;
   simdjson_really_inline ~simdjson_result() noexcept = default; ///< @private
 };
 
diff --git a/src/generic/ondemand/raw_json_string.h b/src/generic/ondemand/raw_json_string.h
index eece50304..c628eca7d 100644
--- a/src/generic/ondemand/raw_json_string.h
+++ b/src/generic/ondemand/raw_json_string.h
@@ -42,6 +42,9 @@ struct simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::raw_json_string> : pub
 public:
   simdjson_really_inline simdjson_result(SIMDJSON_IMPLEMENTATION::ondemand::raw_json_string &&value) noexcept; ///< @private
   simdjson_really_inline simdjson_result(error_code error) noexcept; ///< @private
+
+  simdjson_really_inline simdjson_result() noexcept = default;
+  simdjson_really_inline simdjson_result(const simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::raw_json_string> &a) noexcept = default;
   simdjson_really_inline ~simdjson_result() noexcept = default; ///< @private
 };
 
diff --git a/src/generic/ondemand/token_iterator.h b/src/generic/ondemand/token_iterator.h
index 7c8c9099b..82c25fa8f 100644
--- a/src/generic/ondemand/token_iterator.h
+++ b/src/generic/ondemand/token_iterator.h
@@ -83,6 +83,9 @@ struct simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::token_iterator> : publ
 public:
   simdjson_really_inline simdjson_result(SIMDJSON_IMPLEMENTATION::ondemand::token_iterator &&value) noexcept; ///< @private
   simdjson_really_inline simdjson_result(error_code error) noexcept; ///< @private
+
+  simdjson_really_inline simdjson_result() noexcept = default;
+  simdjson_really_inline simdjson_result(simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::token_iterator> &&a) noexcept = default;
   simdjson_really_inline ~simdjson_result() noexcept = default; ///< @private
 };
 
diff --git a/src/generic/ondemand/value-inl.h b/src/generic/ondemand/value-inl.h
index e9ed1506e..ca0e5154d 100644
--- a/src/generic/ondemand/value-inl.h
+++ b/src/generic/ondemand/value-inl.h
@@ -179,16 +179,6 @@ simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value>
     )
 {
 }
-simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value>::simdjson_result(
-  SIMDJSON_IMPLEMENTATION::ondemand::value &&value,
-  error_code error
-) noexcept :
-    implementation_simdjson_result_base<SIMDJSON_IMPLEMENTATION::ondemand::value>(
-      std::forward<SIMDJSON_IMPLEMENTATION::ondemand::value>(value),
-      error
-    )
-{
-}
 simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value>::simdjson_result(
   error_code error
 ) noexcept :
diff --git a/src/generic/ondemand/value.h b/src/generic/ondemand/value.h
index 3b7e56804..409f13f5c 100644
--- a/src/generic/ondemand/value.h
+++ b/src/generic/ondemand/value.h
@@ -97,8 +97,10 @@ template<>
 struct simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> : public SIMDJSON_IMPLEMENTATION::implementation_simdjson_result_base<SIMDJSON_IMPLEMENTATION::ondemand::value> {
 public:
   simdjson_really_inline simdjson_result(SIMDJSON_IMPLEMENTATION::ondemand::value &&value) noexcept; ///< @private
-  simdjson_really_inline simdjson_result(SIMDJSON_IMPLEMENTATION::ondemand::value &&value, error_code error) noexcept; ///< @private
   simdjson_really_inline simdjson_result(error_code error) noexcept; ///< @private
+
+  simdjson_really_inline simdjson_result() noexcept = default;
+  simdjson_really_inline simdjson_result(simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> &&a) noexcept = default;
   simdjson_really_inline ~simdjson_result() noexcept = default; ///< @private
 
   simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::array> get_array() && noexcept;