Use SFINAE instead of 'requires' clause because of cppcheck.

fsandhei · fsandhei · commit 0c9adb13f535 · 2024-02-29T21:24:31.000+01:00
diff --git a/include/nlohmann/json.hpp b/include/nlohmann/json.hpp
@@ -3692,10 +3692,12 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
 #endif
     }
 
+    // template<typename ScalarType, typename std::enable_if<
+    //              std::is_scalar<ScalarType>::value, int>::type = 0>
     /// @brief comparison: equal
     /// @sa https://json.nlohmann.me/api/basic_json/operator_eq/
-    template <typename T>
-    requires detail::json_compatible_type<T, basic_json_t>::value
+    template <typename T,
+              std::enable_if<detail::json_compatible_type<T, basic_json_t>::value, int>::type = 0>
     bool operator==(T rhs) const noexcept
     {
         return *this == basic_json(rhs);
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
@@ -22912,10 +22912,12 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
 #endif
     }
 
+    // template<typename ScalarType, typename std::enable_if<
+    //              std::is_scalar<ScalarType>::value, int>::type = 0>
     /// @brief comparison: equal
     /// @sa https://json.nlohmann.me/api/basic_json/operator_eq/
-    template <typename T>
-    requires detail::json_compatible_type<T, basic_json_t>::value
+    template <typename T,
+              std::enable_if<detail::json_compatible_type<T, basic_json_t>::value, int>::type = 0>
     bool operator==(T rhs) const noexcept
     {
         return *this == basic_json(rhs);

Original file line number	Diff line number	Diff line change
`@@ -3692,10 +3692,12 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec`
`3692`	`3692`	`#endif`
`3693`	`3693`	`}`
`3694`	`3694`
	`3695`	`+ // template<typename ScalarType, typename std::enable_if<`
	`3696`	`+ // std::is_scalar<ScalarType>::value, int>::type = 0>`
`3695`	`3697`	`/// @brief comparison: equal`
`3696`	`3698`	`/// @sa https://json.nlohmann.me/api/basic_json/operator_eq/`
`3697`		`- template <typename T>`
`3698`		`- requires detail::json_compatible_type<T, basic_json_t>::value`
	`3699`	`+ template <typename T,`
	`3700`	`+ std::enable_if<detail::json_compatible_type<T, basic_json_t>::value, int>::type = 0>`
`3699`	`3701`	`bool operator==(T rhs) const noexcept`
`3700`	`3702`	`{`
`3701`	`3703`	`return *this == basic_json(rhs);`
Original file line number	Diff line number	Diff line change
`@@ -22912,10 +22912,12 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec`
`22912`	`22912`	`#endif`
`22913`	`22913`	`}`
`22914`	`22914`
	`22915`	`+ // template<typename ScalarType, typename std::enable_if<`
	`22916`	`+ // std::is_scalar<ScalarType>::value, int>::type = 0>`
`22915`	`22917`	`/// @brief comparison: equal`
`22916`	`22918`	`/// @sa https://json.nlohmann.me/api/basic_json/operator_eq/`
`22917`		`- template <typename T>`
`22918`		`- requires detail::json_compatible_type<T, basic_json_t>::value`
	`22919`	`+ template <typename T,`
	`22920`	`+ std::enable_if<detail::json_compatible_type<T, basic_json_t>::value, int>::type = 0>`
`22919`	`22921`	`bool operator==(T rhs) const noexcept`
`22920`	`22922`	`{`
`22921`	`22923`	`return *this == basic_json(rhs);`