Fixes

Author: linuxnyasha

universal/include/userver/formats/universal/common_containers.hpp

@@ -97,6 +97,9 @@ template <>
 struct Default<std::string, void> : public impl::EmptyCheck, private impl::Param<std::string_view> {
   inline constexpr Default(std::string_view value) :
       impl::Param<std::string_view>(value) {}
+  template <std::size_t N>
+  inline constexpr Default(const char(&value)[N]) :
+      impl::Param<std::string_view>(value) {}
   inline constexpr auto value() const -> std::string {
     return static_cast<std::string>(static_cast<const impl::Param<std::string_view>&>(*this).value);
   }

universal/include/userver/formats/universal/universal.hpp

@@ -79,7 +79,7 @@ inline constexpr std::optional<std::string> Add(Arg&& arg, Args&&... args) {
 template <typename T, typename TT>
 inline constexpr auto checkCaller(T&& response, TT&& check) 
         requires (requires{FieldConfig<std::remove_cvref_t<T>>::Checker(check, response);} 
-                ? true : requires{check.Check(std::forward<T>(response));}) {
+                || requires{check.Check(std::forward<T>(response));}) {
   using Type = FieldConfig<std::remove_cvref_t<T>>;
   if constexpr(requires{Type::Checker(check, response);}) {
     return Type::Checker(std::forward<TT>(check), response);

universal/src/formats/json/universal_test.cpp

@@ -52,13 +52,13 @@ template <>
 inline constexpr auto formats::universal::kSerialization<SomeStruct2> =
     SerializationConfig<SomeStruct2>()
     .With<"field1">({.Default = 114})
-    .With<"field4">({.Default = {{"42"}}});
+    .With<"field4">({.Default = "42"});
 
 
 TEST(Serialize, Optional) {
   SomeStruct2 a{.field2 = 100};
   const auto json = formats::json::ValueBuilder(a).ExtractValue();
-  EXPECT_EQ(json, userver::formats::json::FromString(R"({"field1":114,"field2":100,"field4":"42"})"));
+  EXPECT_EQ(json, formats::json::FromString(R"({"field1":114,"field2":100,"field4":"42"})"));
 };
 TEST(Parse, Optional) {
   SomeStruct2 valid{.field1 = 114, .field4 = {{"42"}}};