Method fromYamlFile

src/base/AnyMap.cpp:1841–1898

}

AnyMap AnyMap::fromYamlFile(const string& name, const string& parent_name)
{
    string fullName;
    // See if a file with this name exists in a path relative to the parent file
    size_t islash = parent_name.find_last_of("/\\");
    if (islash != npos) {
        string parent_path = parent_name.substr(0, islash);
        if (std::ifstream(parent_path + "/" + name).good()) {
            fullName = parent_path + "/" + name;
        }
    }
    // Otherwise, search the Cantera include path for the file
    if (fullName.empty()) {
        fullName = findInputFile(name);
    }

    // Check for an already-parsed YAML file with the same last-modified time,
    // and return that if possible
    auto mtime = std::filesystem::last_write_time(fullName);
    std::unique_lock<std::mutex> lock(yaml_cache_mutex);
    auto iter = s_cache.find(fullName);
    if (iter != s_cache.end() && iter->second.second == mtime) {
        return iter->second.first;
    }

    if (!std::ifstream(fullName).good()) {
        throw CanteraError("AnyMap::fromYamlFile", "Input file '{}' not found "
            "on the Cantera search path.", name);
    }

    // Generate an AnyMap from the YAML file and store it in the cache
    auto& [cache_item, cache_time] = s_cache[fullName];
    cache_time = mtime;
    try {
        YAML::Node node = YAML::LoadFile(fullName);
        cache_item = node.as<AnyMap>();
        cache_item.setMetadata("filename", AnyValue(fullName));
        cache_item.applyUnits();
    } catch (YAML::Exception& err) {
        s_cache.erase(fullName);
        AnyMap fake;
        fake.setLoc(err.mark.line, err.mark.column);
        fake.setMetadata("filename", AnyValue(fullName));
        throw InputFileError("AnyMap::fromYamlFile", fake, err.msg);
    } catch (CanteraError&) {
        s_cache.erase(fullName);
        throw;
    }
    cache_item["__file__"] = fullName;
    cache_item.setLoc(0, 0);

    if (cache_item.hasKey("deprecated")) {
        warn_deprecated(fullName, cache_item["deprecated"].asString());
    }

    // Return a copy of the AnyMap
    return cache_item;
}