move error and match to util

1 files changed, 18 insertions, 0 deletions

diff --git a/nihil.util/match.ccm b/nihil.util/match.ccm
new file mode 100644
index 0000000..b72416a
--- /dev/null
+++ b/nihil.util/match.ccm
@@ -0,0 +1,18 @@
+// This source code is released into the public domain.
+export module nihil.util:match;
+
+import nihil.std;
+
+namespace nihil {
+
+export template<class... Ts>
+struct match : Ts... { using Ts::operator()...; };
+
+export template<typename... Ts, typename... Fs>
+[[nodiscard]] constexpr decltype(auto) operator|
+	(std::variant<Ts...> const &v, match<Fs...> const &match)
+{
+	return std::visit(match, v);
+}
+
+} // namespace nihil