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--print option to list available feature gates #45223

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Closed

--print option to list available feature gates #45223

wants to merge 1 commit into from

Commits on Oct 12, 2017

  1. --print option to list available feature gates 

    The option is only made available on nightly builds, for the obvious
reason. While we're here, also prevent the unstable `target-spec-json`
(tracking issue rust-lang#38338) from showing up in the --help on stable builds
(although the way in which we accomplish this is slightly clumsy for
lifetime reasons, as noted in the FIXME).

We make REMOVED_FEATURES, ACCEPTED_FEATURES, &c. public for consistency,
even though the functionality at issue only needs ACTIVE_FEATURES.

The UI test will add a little bit of friction for future feature
developers, but it's better than under-testing.

Resolves rust-lang#38768.
    @zackmdavis
    zackmdavis committed Oct 12, 2017
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