1 files changed, 62 insertions, 0 deletions
diff --git a/nihil.config/string.cc b/nihil.config/string.cc
new file mode 100644
index 0000000..0ca4605
--- /dev/null
+++ b/nihil.config/string.cc
@@ -0,0 +1,62 @@
+/*
+ * This source code is released into the public domain.
+ */
+
+module;
+
+#include <coroutine>
+#include <expected>
+#include <format>
+#include <string>
+
+module nihil.config;
+
+import nihil.error;
+import nihil.monad;
+import nihil.ucl;
+
+namespace nihil::config {
+
+string::string(
+	std::string &storage,
+	std::string_view name,
+	std::string_view description) noexcept
+	: option(name, description)
+	, m_storage(storage)
+{
+}
+
+string::~string() = default;
+
+auto string::get_string() const -> std::string
+{
+	return m_storage;
+}
+
+auto string::set_string(std::string_view new_value)
+	-> std::expected<void, error>
+{
+	m_storage = new_value;
+	return {};
+}
+
+auto string::get_ucl() const -> std::expected<ucl::object, error>
+{
+	return ucl::string(m_storage);
+}
+
+auto string::set_ucl(ucl::object const &uclobj) -> std::expected<void, error>
+{
+	auto obj = co_await object_cast<ucl::string>(uclobj)
+		.transform_error([&] (ucl::type_mismatch const &m) {
+			return error(std::format(
+				"'{}': expected string, not {}",
+				name(), str(m.actual_type())));
+		});
+
+	m_storage = obj.value();
+	is_default(false);
+	co_return {};
+}
+
+} // namespace nihil::config