The process class is not default constructible as expected from documentation

[sjoubert]

Based on the current documentation and code comments (boost process v1.90) I was expecting the boost::process::v2::process class (aka basic_process) to be default contructible:

/** An empty process is similar to a default constructed thread. It holds an empty
handle and is a place holder for a process that is to be launched later. */
basic_process() = default;

However when trying to do that I get a compiler error (also see https://godbolt.org/z/nE93jvPqo):

<source>:4:33: error: call to implicitly-deleted default constructor of 'boost::process::v2::process' (aka 'basic_process<>')
    4 |     boost::process::v2::process p;
      |                                 ^
/app/boost/include/boost/process/v2/process.hpp:69:3: note: explicitly defaulted function was implicitly deleted here
   69 |   basic_process() = default;
      |   ^
/app/boost/include/boost/process/v2/process.hpp:340:34: note: default constructor of 'basic_process<>' is implicitly deleted because field 'process_handle_' has no default constructor
  340 |   basic_process_handle<Executor> process_handle_;
      |                                  ^
1 error generated.
Compiler returned: 1

Is the process class supposed to be default-constructible or not? If not the default constructor should probably be = delete instead of defaulted and the comment removed.

[klemens-morgenstern]

It's not, that's a documentation mistake.