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include/adclib/adclib_common.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <expected>
+#include <system_error>
+#include <type_traits>
+
+namespace adc
+{
+
+// library-wide error type definition
+
+typedef std::error_code adc_error_t;
+
+template <typename VT>
+using adc_result_t = std::expected<VT, adc_error_t>;
+
+template <typename T>
+concept adc_result_c = requires {
+    []<typename VT>(std::type_identity<adc_result_t<VT>>) {}(std::type_identity<std::remove_cvref_t<T>>());
+};
+
+}  // namespace adc