Add the alloc::prelude module
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It contains the re-exports that are in `std::prelude::v1` but not in `core::prelude::v1`. Calling it prelude is somewhat of a misnomer since (unlike those modules in `std` or `core`) its contents are never implicitly imported in modules. Rather it is intended to be used with an explicit glob import like `use alloc::prelude::*;`. However there is precedent for the same misnomer with `std::io::prelude`, for example. This new module is unstable with the same feature name as the `alloc` care. They are proposed for stabilization together in RFC rust-lang/rfcs#2480
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As discussed in #52119, this not using a |
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Add the `alloc::prelude` module It contains the re-exports that are in `std::prelude::v1` but not in `core::prelude::v1`. Calling it prelude is somewhat of a misnomer since (unlike those modules in `std` or `core`) its contents are never implicitly imported in modules. Rather it is intended to be used with an explicit glob import like `use alloc::prelude::*;`. However there is precedent for the same misnomer with `std::io::prelude`, for example. This new module is unstable with the same feature name as the `alloc` care. They are proposed for stabilization together in RFC rust-lang/rfcs#2480.
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It contains the re-exports that are in
std::prelude::v1but not incore::prelude::v1.Calling it prelude is somewhat of a misnomer since (unlike those modules in
stdorcore) its contents are never implicitly imported in modules. Rather it is intended to be used with an explicit glob import likeuse alloc::prelude::*;. However there is precedent for the same misnomer withstd::io::prelude, for example.This new module is unstable with the same feature name as the
alloccare. They are proposed for stabilization together in RFC rust-lang/rfcs#2480.