### jsoncons::ubjson::encode_ubjson

Encodes a C++ data structure to the [Universal Binary JSON Specification (UBJSON)](http://ubjsonspec.org/) data format.

```c++
#include <jsoncons_ext/ubjson/ubjson.hpp>

template<class T>
void encode_ubjson(const T& jval, std::vector<uint8_t>& v,
                   const ubjson_decode_options& options = ubjson_decode_options()); (1) (until v0.152.0)

template<class T, class Container>
void encode_ubjson(const T& jval, Container& v,
                   const ubjson_decode_options& options = ubjson_decode_options()); (1) (since v0.152.0)

template<class T>
void encode_ubjson(const T& jval, 
                   std::ostream& os,
                   const bson_decode_options& options = bson_decode_options()); (2)
```

(1) Writes a value of type T into a byte container in the UBJSON data format, using the specified (or defaulted) [options](ubjson_options.md).
Type 'T' must be an instantiation of [basic_json](../basic_json.md) 
or support [json_type_traits](../json_type_traits.md).  
Type `Container` must be back insertable and have member type `value_type` with size exactly 8 bits (since v0.152.0.)
Any of the values types `int8_t`, `uint8_t`, `char`, `unsigned char` and `std::byte` (since C++17) are allowed.

(2) Writes a value of type T into a binary stream in the UBJSON data format, using the specified (or defaulted) [options](ubjson_options.md). 
Type 'T' must be an instantiation of [basic_json](../basic_json.md) 
or support [json_type_traits](../json_type_traits.md).

### See also

[decode_ubjson](decode_ubjson) decodes a [Binary JSON](http://ubjsonspec.org/) data format to a json value.

