https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106932
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think this is the correct behaviour according to the standard.
Where f is status("source") and t is status("dest").
Effects are then as follows:
- If f.type() or t.type() is an implementation-defined file type ...
[they're not]
- Otherwise, an error is reported as specified in 31.12.5 if:
[list of conditions that are not true]
- Otherwise, if is_symlink(f), then:
[it's not]
- Otherwise, if is_regular_file(f), then:
[it's not]
- Otherwise, if
is_directory(f) &&
(options & copy_options::create_symlinks) != copy_options::none
[create_symlinks is not set in the options]
- Otherwise, if
is_directory(f) &&
((options & copy_options::recursive) != copy_options::none ||
options == copy_options::none)
[this is the case we want to hit, but the condition is false because recursive
is not set and options != none]
- Otherwise, for the signature with argument ec, ec.clear().
[You didn't pass an erroc_code]
- Otherwise, no effects.
[Bingo]
So you need to use copy_options::recursive to get the effects you want.
