# `std::ostream &operator<<(std::ostream &, const basic_result<T, E, NoValuePolicy> &)`

Serialises a `basic_result` to a `std::ostream`.

Serialisation format is:

    <unsigned int flags><space><value_type if set and not void><error_type if set and not void>

This is the wrong function to use if you wish to print human readable output. Use `std::string print(const basic_result<T, E, NoValuePolicy> &)` instead.

Overridable: Not overridable.

Requires: That `operator<<` is a valid expression for `std::ostream` and `T` and `E`.

Namespace: `BOOST_OUTCOME_V2_NAMESPACE`

Header: `<boost/outcome/iostream_support.hpp>` (must be explicitly included manually).

Last revised: March 03, 2019 at 21:04:29 UTC