add noexcept tests

src/json.hpp

@@ -840,7 +840,7 @@ template <typename = void, typename = void>
 struct adl_serializer
 {
     template <typename Json, typename T>
-    static void from_json(Json&& j, T& val)
+    static void from_json(Json&& j, T& val) noexcept(noexcept(::nlohmann::from_json(std::forward<Json>(j), val)))
     {
         ::nlohmann::from_json(std::forward<Json>(j), val);
     }

src/json.hpp.re2c

@@ -840,7 +840,7 @@ template <typename = void, typename = void>
 struct adl_serializer
 {
     template <typename Json, typename T>
-    static void from_json(Json&& j, T& val)
+    static void from_json(Json&& j, T& val) noexcept(noexcept(::nlohmann::from_json(std::forward<Json>(j), val)))
     {
         ::nlohmann::from_json(std::forward<Json>(j), val);
     }

test/src/unit-noexcept.cpp

@@ -13,6 +13,8 @@ struct pod_bis {};
 
 void to_json(json &, pod) noexcept;
 void to_json(json &, pod_bis);
+void from_json(const json&, pod) noexcept;
+void from_json(const json&, pod_bis);
 static json j;
 
 static_assert(noexcept(json{}), "");
@@ -25,3 +27,6 @@ static_assert(not noexcept(nlohmann::to_json(j, pod_bis{})), "");
 static_assert(noexcept(json(2)), "");
 static_assert(noexcept(json(test{})), "");
 static_assert(noexcept(json(pod{})), "");
+static_assert(noexcept(j.get<pod>()), "");
+static_assert(not noexcept(j.get<pod_bis>()), "");
+static_assert(noexcept(json(pod{})), "");