Rollup of 5 pull requests #60672
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Rollup of 5 pull requests #60672
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This is similar to `NonNull::cast`. Compared to the `as` operator (which has a wide range of meanings depending on the input and output types), a call to this method: * Can only go from a raw pointer to a raw pointer * Cannot change the pointer’s `const`ness … even when the pointed types are inferred based on context.
(Partially) brings back rust-lang#33921
Add a `cast` method to raw pointers. This is similar to `NonNull::cast`. Compared to the `as` operator (which has a wide range of meanings depending on the input and output types), a call to this method: * Can only go from a raw pointer to a raw pointer * Cannot change the pointer’s `const`ness … even when the pointed types are inferred based on context.
pin: make the to-module link more visible Cc @gnzlbg
…ister cleanup: Remove `DefIndexAddressSpace` The scheme with two address spaces for `DefIndex` was needed in the past, but apparently not needed anymore (after removing `DefId`s from locals and `HirId`-ification).
…lice, r=sfackler Inline some Cursor calls for slices (Partially) brings back rust-lang#33921 I've noticed in some serialization code I was writing that writes to slices produce much, much, worse code than you'd expect even with optimizations turned on. For example, you'd expect something like this to be zero cost: ``` use std::io::{self, Cursor, Write}; pub fn serialize((a, b): (u64, u64)) -> [u8;8+8] { let mut r = [0u8;16]; { let mut w = Cursor::new(&mut r[..]); w.write(&a.to_le_bytes()).unwrap(); w.write(&b.to_le_bytes()).unwrap(); } r } ``` ...but it compiles down to [dozens of instructions](https://rust.godbolt.org/z/bdwDzb) because the `slice_write()` calls aren't inlined, which in turn means `unwrap()` can't be optimized away, and so on. To be clear, this pull-req isn't sufficient by itself: if we want to go down that path we also need to add `#[inline]`'s to the default implementations for functions like `write_all()` in the `Write` trait and so on, or implement them separately in the `Cursor` impls. But I figured I'd start a conversation about what tradeoffs we're expecting here.
…apin Stabilize and re-export core::array in std Fixes rust-lang#60014
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@bors r+ p=5 rollup=never |
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📌 Commit e40f9a6 has been approved by |
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Rollup of 5 pull requests Successful merges: - #60601 (Add a `cast` method to raw pointers.) - #60638 (pin: make the to-module link more visible) - #60647 (cleanup: Remove `DefIndexAddressSpace`) - #60656 (Inline some Cursor calls for slices) - #60657 (Stabilize and re-export core::array in std) Failed merges: r? @ghost
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Due to #60657, looks like main CI is going to fail as well. |
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Except dist-various-2 just passed...? |
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Oh the use is only in |
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☀️ Test successful - checks-travis, status-appveyor |
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Tested on commit rust-lang/rust@a784a80. Direct link to PR: <rust-lang/rust#60672> 💔 rls on windows: test-pass → test-fail (cc @Xanewok, @rust-lang/infra).
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Beta accepted specifically 028e78d. |
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@pietroalbini Remember to look at #60672 (comment).
Successful merges:
castmethod to raw pointers. #60601 (Add acastmethod to raw pointers.)DefIndexAddressSpace#60647 (cleanup: RemoveDefIndexAddressSpace)Failed merges:
r? @ghost