#pragma once

#include <string>
#include <variant>

namespace sc {

struct CodecError {
    std::string message;
};

// C++20 does not provide std::expected. Use a variant-based result type so
// fallible codec operations do not rely on exceptions.
template <typename T> using CodecResult = std::variant<T, CodecError>;

template <typename T> constexpr bool is_codec_error(const CodecResult<T>& result) noexcept {
    return std::holds_alternative<CodecError>(result);
}

template <typename T> T& codec_value(CodecResult<T>& result) {
    return std::get<T>(result);
}

template <typename T> const T& codec_value(const CodecResult<T>& result) {
    return std::get<T>(result);
}

template <typename T> CodecError& codec_error(CodecResult<T>& result) {
    return std::get<CodecError>(result);
}

template <typename T> const CodecError& codec_error(const CodecResult<T>& result) {
    return std::get<CodecError>(result);
}

} // namespace sc