std: Stabilize the prelude module #20157
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r? @aturon (rust_highfive has picked a reviewer for you, use r? to override) |
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cc @steveklabnik, you may be particularly interested in the guide changes here. |
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Yes, let me send a PR. |
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I've checked that the new prelude conforms to the RFC, and it LGTM. (I didn't bother looking at the 300+ files worth of new imports...) r=me after a rebase. |
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This commit is an implementation of [RFC 503][rfc] which is a stabilization story for the prelude. Most of the RFC was directly applied, removing reexports. Some reexports are kept around, however: * `range` remains until range syntax has landed to reduce churn. * `Path` and `GenericPath` remain until path reform lands. This is done to prevent many imports of `GenericPath` which will soon be removed. * All `io` traits remain until I/O reform lands so imports can be rewritten all at once to `std::io::prelude::*`. This is a breaking change because many prelude reexports have been removed, and the RFC can be consulted for the exact list of removed reexports, as well as to find the locations of where to import them. [rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md [breaking-change] Closes rust-lang#20068
Now that it's been removed from the prelude, we need to treat things differently. Fixes rust-lang#17967
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Re-enable fixpoint iteration for variance computation
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This commit is an implementation of RFC 503 which is a stabilization
story for the prelude. Most of the RFC was directly applied, removing reexports.
Some reexports are kept around, however:
rangeremains until range syntax has landed to reduce churn.PathandGenericPathremain until path reform lands. This is done toprevent many imports of
GenericPathwhich will soon be removed.iotraits remain until I/O reform lands so imports can be rewritten allat once to
std::io::prelude::*.This is a breaking change because many prelude reexports have been removed, and
the RFC can be consulted for the exact list of removed reexports, as well as to
find the locations of where to import them.
[breaking-change]
Closes #20068