From d11e94f2a5d0d8f2b8aaef4d2bea945b3c723457 Mon Sep 17 00:00:00 2001
From: Felix Schindler <107669806+ftschindler@users.noreply.github.com>
Date: Tue, 26 Aug 2025 14:35:43 +0200
Subject: [PATCH 1/2] make read_one_alternative more general

MSVC 17.14 did not pick up the move assignment here and was
complaining about a missing copy assignment operator in
std::optional. Using emplace fixes the issue for me.
---
 include/rfl/parsing/Parser_variant.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/rfl/parsing/Parser_variant.hpp b/include/rfl/parsing/Parser_variant.hpp
index dbe1a55b..7df692b1 100644
--- a/include/rfl/parsing/Parser_variant.hpp
+++ b/include/rfl/parsing/Parser_variant.hpp
@@ -214,7 +214,7 @@ class Parser<R, W, std::variant<AlternativeTypes...>, ProcessorsType> {
           std::remove_cvref_t<internal::nth_element_t<_i, AlternativeTypes...>>;
       auto res = Parser<R, W, AltType, ProcessorsType>::read(_r, _var);
       if (res) {
-        *_result = std::move(*res);
+        _result->emplace(std::variant<AlternativeTypes...>{std::move(*res)});
       } else {
         _errors->emplace_back(std::move(res.error()));
       }

From e13422f8d37b64520ba9fb45bad6150a1848fd25 Mon Sep 17 00:00:00 2001
From: Felix Schindler <107669806+ftschindler@users.noreply.github.com>
Date: Tue, 26 Aug 2025 14:39:28 +0200
Subject: [PATCH 2/2] aimplify emplace call in std::variant parser

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
---
 include/rfl/parsing/Parser_variant.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/rfl/parsing/Parser_variant.hpp b/include/rfl/parsing/Parser_variant.hpp
index 7df692b1..41218df1 100644
--- a/include/rfl/parsing/Parser_variant.hpp
+++ b/include/rfl/parsing/Parser_variant.hpp
@@ -214,7 +214,7 @@ class Parser<R, W, std::variant<AlternativeTypes...>, ProcessorsType> {
           std::remove_cvref_t<internal::nth_element_t<_i, AlternativeTypes...>>;
       auto res = Parser<R, W, AltType, ProcessorsType>::read(_r, _var);
       if (res) {
-        _result->emplace(std::variant<AlternativeTypes...>{std::move(*res)});
+        _result->emplace(std::move(*res));
       } else {
         _errors->emplace_back(std::move(res.error()));
       }