read()

template<typename T >

std::optional< T > MayaFlux::IO::JSONSerializer::read ( const std::string &  path )

inline

Read path and deserialize into T.

Returns

Populated instance, or nullopt on file or parse error. On failure call last_error().

Definition at line 110 of file JSONSerializer.hpp.

    {
        m_last_error.clear();
        const auto resolved = resolve_path(path);
        std::ifstream file(resolved);
        if (!file.is_open()) {
            m_last_error = "Failed to open for reading: " + resolved;
            return std::nullopt;
        }
        try {
            auto j = nlohmann::json::parse(file);
            T out {};
            from_json(j, out);
            return out;
        } catch (const std::exception& e) {
            m_last_error = std::string("read error in ") + resolved + ": " + e.what();
            return std::nullopt;
        }
    }

References out, and MayaFlux::IO::T.

Referenced by MayaFlux::Nexus::StateDecoder::decode(), MayaFlux::Config::load_config_from_file(), MayaFlux::Nexus::StateDecoder::reconstruct(), and MayaFlux::Nexus::StateDecoder::reconstruct().

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