Support file stream

[yihuajack]

struct Design {
    std::string name;
};

struct UserYaml {
    Design design;
};

std::string read_file(const std::filesystem::path& path) {
    std::ifstream file(path);
    return std::string{(std::istreambuf_iterator(file)), std::istreambuf_iterator<char>()};
}

const std::string user_yaml_contents = read_file(user_yaml_path);
UserYaml user_yaml;
struct_yaml::from_yaml(user_yaml, user_yaml_contents);

The program will terminate called after throwing an instance of 'std::runtime_error'
what(): \n is not expected

[qicosmos]

yaml文件也发出来

[qicosmos]

@bbbgan 你也看看

[yihuajack]

yaml文件也发出来

It seems that the problem is originated from incorrect parsing of \r\n line endings. If I erase all \r chars from the file content string by std::erase(user_yaml_contents, '\r'), the problem is eliminated.

[yihuajack]

Is it possible to add a convenient function interface like jbeder/yaml-cpp's YAML::LoadFile()?

[qicosmos]

Right, maybe provide LoadFile method is better.