feat userver: cusom exception for FromString

Tests: unittests
commit_hash:df1a08db1791e46067bcbd5075ebc6e7ed7d702b

Author: kopturovdim

universal/include/userver/utils/from_string.hpp

@@ -22,6 +22,11 @@ USERVER_NAMESPACE_BEGIN
 
 namespace utils {
 
+class FromStringException : public std::runtime_error {
+public:
+    using std::runtime_error::runtime_error;
+};
+
 namespace impl {
 
 template <typename T, typename = void>

universal/src/utils/from_string.cpp

@@ -14,7 +14,7 @@ namespace impl {
 
 [[noreturn]] void
 ThrowFromStringException(std::string_view message, std::string_view input, std::type_index result_type) {
-    throw std::runtime_error(fmt::format(
+    throw FromStringException(fmt::format(
         R"(utils::FromString error: "{}" while converting "{}" to {})",
         message,
         input,

universal/src/utils/from_string_test.cpp

@@ -32,7 +32,7 @@ std::string ToString(T value) {
 
 template <typename T>
 auto TestInvalid(const std::string& input) {
-    ASSERT_THROW(utils::FromString<T>(input), std::runtime_error)
+    ASSERT_THROW(utils::FromString<T>(input), utils::FromStringException)
         << "type = " << compiler::GetTypeName<T>() << ", input = \"" << input << "\"";
 }
 
@@ -227,7 +227,7 @@ TYPED_TEST(FromStringTest, ExceptionDetails) {
 
     try {
         utils::FromString<T>(".blah");
-    } catch (const std::runtime_error& e) {
+    } catch (const utils::FromStringException& e) {
         what = e.what();
     } catch (const std::exception& e) {
         // swallow