print=check-cfg
The tracking issue for this feature is: #125704.
This option of the --print flag print the list of all the expected cfgs.
This is related to the --check-cfg flag which allows specifying arbitrary expected
names and values.
This print option works similarly to --print=cfg (modulo check-cfg specifics).
--check-cfg | --print=check-cfg |
|---|---|
cfg(foo) | foo |
cfg(foo, values("bar")) | foo="bar" |
cfg(foo, values(none(), "bar")) | foo & foo="bar" |
| check-cfg specific syntax | |
cfg(foo, values(any()) | foo=any() |
cfg(foo, values()) | foo= |
cfg(any()) | any() |
| none | any()=any() |
To be used like this:
rustc --print=check-cfg -Zunstable-options lib.rs