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Release 0.9.0-alpha.1 #3219

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91 changes: 0 additions & 91 deletions .github/workflows/ci.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -75,12 +75,7 @@ jobs:
# which a particular feature is supported.
"no-zerocopy-simd-x86-avx12-1-89-0",
"no-zerocopy-core-error-1-81-0",
"no-zerocopy-diagnostic-on-unimplemented-1-78-0",
"no-zerocopy-generic-bounds-in-const-fn-1-61-0",
"no-zerocopy-target-has-atomics-1-60-0",
"no-zerocopy-aarch64-simd-1-59-0",
"no-zerocopy-aarch64-simd-be-1-87-0",
"no-zerocopy-panic-in-const-and-vec-try-reserve-1-57-0"
]
target: [
"i686-unknown-linux-gnu",
Expand Down Expand Up @@ -114,18 +109,8 @@ jobs:
features: "--all-features"
- toolchain: "no-zerocopy-core-error-1-81-0"
features: "--all-features"
- toolchain: "no-zerocopy-diagnostic-on-unimplemented-1-78-0"
features: "--all-features"
- toolchain: "no-zerocopy-generic-bounds-in-const-fn-1-61-0"
features: "--all-features"
- toolchain: "no-zerocopy-target-has-atomics-1-60-0"
features: "--all-features"
- toolchain: "no-zerocopy-aarch64-simd-1-59-0"
features: "--all-features"
- toolchain: "no-zerocopy-aarch64-simd-be-1-87-0"
features: "--all-features"
- toolchain: "no-zerocopy-panic-in-const-and-vec-try-reserve-1-57-0"
features: "--all-features"
# Exclude any combination for the zerocopy-derive crate which
# uses zerocopy features.
- crate: "zerocopy-derive"
Expand All @@ -142,44 +127,12 @@ jobs:
toolchain: "no-zerocopy-simd-x86-avx12-1-89-0"
- crate: "zerocopy-derive"
toolchain: "no-zerocopy-core-error-1-81-0"
- crate: "zerocopy-derive"
toolchain: "no-zerocopy-diagnostic-on-unimplemented-1-78-0"
- crate: "zerocopy-derive"
toolchain: "no-zerocopy-generic-bounds-in-const-fn-1-61-0"
- crate: "zerocopy-derive"
toolchain: "no-zerocopy-target-has-atomics-1-60-0"
- crate: "zerocopy-derive"
toolchain: "no-zerocopy-aarch64-simd-1-59-0"
- crate: "zerocopy-derive"
toolchain: "no-zerocopy-aarch64-simd-be-1-87-0"
- crate: "zerocopy-derive"
toolchain: "no-zerocopy-panic-in-const-and-vec-try-reserve-1-57-0"
# Exclude stable/wasm since wasm is no longer provided via rustup on
# stable.
- toolchain: "stable"
target: "wasm32-unknown-unknown"
# Exclude non-aarch64 targets from the `no-zerocopy-aarch64-simd-1-59-0`
# toolchain.
- toolchain: "no-zerocopy-aarch64-simd-1-59-0"
target: "i686-unknown-linux-gnu"
- toolchain: "no-zerocopy-aarch64-simd-1-59-0"
target: "x86_64-unknown-linux-gnu"
- toolchain: "no-zerocopy-aarch64-simd-1-59-0"
target: "arm-unknown-linux-gnueabi"
- toolchain: "no-zerocopy-aarch64-simd-1-59-0"
target: "powerpc-unknown-linux-gnu"
- toolchain: "no-zerocopy-aarch64-simd-1-59-0"
target: "powerpc64-unknown-linux-gnu"
- toolchain: "no-zerocopy-aarch64-simd-1-59-0"
target: "riscv64gc-unknown-linux-gnu"
- toolchain: "no-zerocopy-aarch64-simd-1-59-0"
target: "s390x-unknown-linux-gnu"
- toolchain: "no-zerocopy-aarch64-simd-1-59-0"
target: "x86_64-pc-windows-msvc"
- toolchain: "no-zerocopy-aarch64-simd-1-59-0"
target: "thumbv6m-none-eabi"
- toolchain: "no-zerocopy-aarch64-simd-1-59-0"
target: "wasm32-unknown-unknown"
# Exclude non-aarch64 targets from the `no-zerocopy-aarch64-simd-be-1-87-0`
# toolchain.
- toolchain: "no-zerocopy-aarch64-simd-be-1-87-0"
Expand Down Expand Up @@ -223,50 +176,6 @@ jobs:
target: "thumbv6m-none-eabi"
- toolchain: "no-zerocopy-core-error-1-81-0"
target: "wasm32-unknown-unknown"
# Exclude most targets from the
# `no-zerocopy-diagnostic-on-unimplemented-1-78-0` toolchain since the
# `no-zerocopy-diagnostic-on-unimplemented-1-78-0` feature is unrelated to
# compilation target. This only leaves i686 and x86_64 targets.
- toolchain: "no-zerocopy-diagnostic-on-unimplemented-1-78-0"
target: "arm-unknown-linux-gnueabi"
- toolchain: "no-zerocopy-diagnostic-on-unimplemented-1-78-0"
target: "aarch64-unknown-linux-gnu"
- toolchain: "no-zerocopy-diagnostic-on-unimplemented-1-78-0"
target: "powerpc-unknown-linux-gnu"
- toolchain: "no-zerocopy-diagnostic-on-unimplemented-1-78-0"
target: "powerpc64-unknown-linux-gnu"
- toolchain: "no-zerocopy-diagnostic-on-unimplemented-1-78-0"
target: "riscv64gc-unknown-linux-gnu"
- toolchain: "no-zerocopy-diagnostic-on-unimplemented-1-78-0"
target: "s390x-unknown-linux-gnu"
- toolchain: "no-zerocopy-diagnostic-on-unimplemented-1-78-0"
target: "x86_64-pc-windows-msvc"
- toolchain: "no-zerocopy-diagnostic-on-unimplemented-1-78-0"
target: "thumbv6m-none-eabi"
- toolchain: "no-zerocopy-diagnostic-on-unimplemented-1-78-0"
target: "wasm32-unknown-unknown"
# Exclude most targets from the
# `no-zerocopy-generic-bounds-in-const-fn-1-61-0` toolchain since the
# `no-zerocopy-generic-bounds-in-const-fn-1-61-0` feature is unrelated to
# compilation target. This only leaves i686 and x86_64 targets.
- toolchain: "no-zerocopy-generic-bounds-in-const-fn-1-61-0"
target: "arm-unknown-linux-gnueabi"
- toolchain: "no-zerocopy-generic-bounds-in-const-fn-1-61-0"
target: "aarch64-unknown-linux-gnu"
- toolchain: "no-zerocopy-generic-bounds-in-const-fn-1-61-0"
target: "powerpc-unknown-linux-gnu"
- toolchain: "no-zerocopy-generic-bounds-in-const-fn-1-61-0"
target: "powerpc64-unknown-linux-gnu"
- toolchain: "no-zerocopy-generic-bounds-in-const-fn-1-61-0"
target: "riscv64gc-unknown-linux-gnu"
- toolchain: "no-zerocopy-generic-bounds-in-const-fn-1-61-0"
target: "s390x-unknown-linux-gnu"
- toolchain: "no-zerocopy-generic-bounds-in-const-fn-1-61-0"
target: "x86_64-pc-windows-msvc"
- toolchain: "no-zerocopy-generic-bounds-in-const-fn-1-61-0"
target: "thumbv6m-none-eabi"
- toolchain: "no-zerocopy-generic-bounds-in-const-fn-1-61-0"
target: "wasm32-unknown-unknown"
# Exclude `thumbv6m-none-eabi` combined with any feature that implies
# the `std` feature since `thumbv6m-none-eabi` does not include a
# pre-compiled std.
Expand Down
4 changes: 2 additions & 2 deletions Cargo.lock
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39 changes: 14 additions & 25 deletions Cargo.toml
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Expand Up @@ -15,7 +15,7 @@
[package]
edition = "2021"
name = "zerocopy"
version = "0.8.48"
version = "0.9.0-alpha.1"
authors = [
"Joshua Liebow-Feeser <joshlf@google.com>",
"Jack Wrenn <jswrenn@amazon.com>",
Expand All @@ -31,7 +31,8 @@ categories = [
keywords = ["cast", "convert", "transmute", "transmutation", "type-punning"]
license = "BSD-2-Clause OR Apache-2.0 OR MIT"
repository = "https://github.com/google/zerocopy"
rust-version = "1.56.0"
# WARNING: Consult with the Rust for Linux project before increasing.
rust-version = "1.78.0"

exclude = [".*"]

Expand Down Expand Up @@ -64,43 +65,31 @@ no-zerocopy-simd-x86-avx12-1-89-0 = "1.89.0"
# From 1.81.0, Rust supports the `core::error::Error` trait.
no-zerocopy-core-error-1-81-0 = "1.81.0"

# From 1.78.0, Rust supports the `#[diagnostic::on_unimplemented]` attribute.
no-zerocopy-diagnostic-on-unimplemented-1-78-0 = "1.78.0"

# From 1.61.0, Rust supports generic types with trait bounds in `const fn`.
no-zerocopy-generic-bounds-in-const-fn-1-61-0 = "1.61.0"

# From 1.60.0, Rust supports `cfg(target_has_atomics)`, which allows us to
# detect whether a target supports particular sets of atomics.
no-zerocopy-target-has-atomics-1-60-0 = "1.60.0"

# When the "simd" feature is enabled, include SIMD types from the
# `core::arch::aarch64` module, which was stabilized in 1.59.0. On earlier Rust
# versions, these types require the "simd-nightly" feature.
no-zerocopy-aarch64-simd-1-59-0 = "1.59.0"

# Include SIMD types from `core::arch::aarch64` on big endian targets. Prior to
# 1.87.0 (https://github.com/rust-lang/rust/pull/136831) the types were only
# correct on little endian and backed off from stable in a breaking change.
no-zerocopy-aarch64-simd-be-1-87-0 = "1.87.0"

# Permit panicking in `const fn`s and calling `Vec::try_reserve`.
no-zerocopy-panic-in-const-and-vec-try-reserve-1-57-0 = "1.57.0"

[package.metadata.ci]
# The versions of the stable and nightly compiler toolchains to use in CI.
pinned-stable = "1.93.1"
pinned-nightly = "nightly-2026-01-25"

[package.metadata.docs.rs]
all-features = true
rustdoc-args = ["--cfg", "doc_cfg", "--generate-link-to-definition", "--extend-css", "rustdoc/style.css"]
rustdoc-args = [
"--cfg",
"doc_cfg",
"--generate-link-to-definition",
"--extend-css",
"rustdoc/style.css",
]
targets = [
"x86_64-unknown-linux-gnu",
"x86_64-apple-darwin",
"x86_64-pc-windows-msvc",
"i686-unknown-linux-gnu",
"i686-pc-windows-msvc"
"i686-pc-windows-msvc",
]

[package.metadata.playground]
Expand All @@ -124,13 +113,13 @@ __internal_use_only_features_that_work_on_stable = [
]

[dependencies]
zerocopy-derive = { version = "=0.8.48", path = "zerocopy-derive", optional = true }
zerocopy-derive = { version = "=0.9.0-alpha.1", path = "zerocopy-derive", optional = true }

# The "associated proc macro pattern" ensures that the versions of zerocopy and
# zerocopy-derive remain equal, even if the 'derive' feature isn't used.
# See: https://github.com/matklad/macro-dep-test
[target.'cfg(any())'.dependencies]
zerocopy-derive = { version = "=0.8.48", path = "zerocopy-derive" }
zerocopy-derive = { version = "=0.9.0-alpha.1", path = "zerocopy-derive" }

[dev-dependencies]
# FIXME(#381) Remove this dependency once we have our own layout gadgets.
Expand All @@ -142,4 +131,4 @@ rustversion = "1.0"
static_assertions = "1.1"
testutil = { path = "testutil" }
# In tests, unlike in production, zerocopy-derive is not optional
zerocopy-derive = { version = "=0.8.48", path = "zerocopy-derive" }
zerocopy-derive = { version = "=0.9.0-alpha.1", path = "zerocopy-derive" }
23 changes: 19 additions & 4 deletions POLICIES.md
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Expand Up @@ -89,21 +89,36 @@ documented guarantees do not hold.

## MSRV

TL;DR:
- 0.8 is our long-term stability (LTS) release train. On 0.8, we consider MSRV bumps to be breaking changes.
- On 0.9, we do *not* consider MSRV bumps to be breaking changes.

### 0.8

<!-- Our policy used to be simply that MSRV was a breaking change in all
circumstances. This implicitly relied on syn having the same MSRV policy, which
it does not. See #1085 and #1088. -->

*This section only applies to the 0.8 version train.*

Without the `derive` feature enabled, zerocopy's minimum supported Rust version
(MSRV) is encoded the `package.rust-version` field in its `Cargo.toml` file. For
zerocopy, we consider an increase in MSRV to be a semver-breaking change, and
will only increase our MSRV during semver-breaking version changes (e.g., 0.1 ->
0.2, 1.0 -> 2.0, etc).
zerocopy, we consider an increase in MSRV to be a semver-breaking change. We
will not bump our MSRV on the 0.8 version train.

For zerocopy with the `derive` feature enabled, and for the zerocopy-derive
crate, we inherit the maximum MSRV any of our dependencies. As of this writing
(2024-10-03), at least one dependency (syn) does *not* consider MSRV increases
to be semver-breaking changes. Thus, using the `derive` feature may result in
the effective MSRV increasing within a semver version train.
the effective MSRV increasing within 0.8.

### 0.9

*This section only applies to the 0.9 version train.*

0.9 has no official MSRV policy. We do not consider MSRV bumps to be breaking
changes. We may adopt *some* MSRV policy in the future, but we make no
guarantees about what it will be.

## Yanking

Expand Down
8 changes: 4 additions & 4 deletions agent_docs/development.md
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Expand Up @@ -33,7 +33,7 @@ This is equivalent to:
`cargo +1.2.3 <command> [args]`

...where `1.2.3` is the toolchain version named by `<toolchain>` (e.g., `msrv` ->
`1.56.0`).
`1.78.0`).

### Toolchains

Expand All @@ -47,12 +47,12 @@ The `<toolchain>` argument is mandatory:

## MSRV (Minimum Supported Rust Version)

The MSRV is **1.56.0**.
The MSRV is **1.78.0**.

- **Do NOT** use features stabilized after 1.56.0 unless version-gated.
- **Do NOT** use features stabilized after 1.78.0 unless version-gated.
- **Requirement:** Ask for user approval before introducing new version-gated
behavior.
- **Verify**: Ensure code compiles on 1.56.0 (`./cargo.sh +msrv ...`).
- **Verify**: Ensure code compiles on 1.78.0 (`./cargo.sh +msrv ...`).

### Version Gating Convention

Expand Down
12 changes: 6 additions & 6 deletions src/byteorder.rs
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Expand Up @@ -1059,8 +1059,8 @@ mod tests {
/// themselves. This method is like `assert_eq!`, but it treats NaN
/// values as equal.
fn assert_eq_or_nan(self, other: Self) {
let slf = (!self.is_nan()).then(|| self);
let other = (!other.is_nan()).then(|| other);
let slf = (!self.is_nan()).then_some(self);
let other = (!other.is_nan()).then_some(other);
assert_eq!(slf, other);
}
}
Expand Down Expand Up @@ -1090,8 +1090,8 @@ mod tests {
/// themselves. This method is like `assert_eq!`, but it treats NaN
/// values as equal.
fn assert_eq_or_nan(self, other: Self) {
let slf = (!self.get().is_nan()).then(|| self);
let other = (!other.get().is_nan()).then(|| other);
let slf = (!self.get().is_nan()).then_some(self);
let other = (!other.get().is_nan()).then_some(other);
assert_eq!(slf, other);
}
}
Expand Down Expand Up @@ -1401,7 +1401,7 @@ mod tests {
let t_t_res = val_or_none(t_t_res);
let t_n_res = val_or_none(t_n_res);
let n_t_res = val_or_none(n_t_res);
let n_n_res = (!T::Native::is_nan(n_n_res)).then(|| n_n_res);
let n_n_res = (!T::Native::is_nan(n_n_res)).then_some(n_n_res);
assert_eq!(t_t_res, n_n_res);
assert_eq!(t_n_res, n_n_res);
assert_eq!(n_t_res, n_n_res);
Expand All @@ -1419,7 +1419,7 @@ mod tests {
// NaN as `None` so they can still be compared.
let t_t_res = val_or_none(t_t_res);
let t_n_res = val_or_none(t_n_res);
let n_t_res = (!T::Native::is_nan(n_t_res)).then(|| n_t_res);
let n_t_res = (!T::Native::is_nan(n_t_res)).then_some(n_t_res);
assert_eq!(t_t_res, n_n_res);
assert_eq!(t_n_res, n_n_res);
assert_eq!(n_t_res, n_n_res);
Expand Down
18 changes: 7 additions & 11 deletions src/impls.rs
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Expand Up @@ -383,15 +383,12 @@ const _: () = unsafe {
unsafe_impl_for_power_set!(A, B, C, D, E, F, G, H, I, J, K, L -> M => Immutable for opt_unsafe_extern_c_fn!(...));
};

#[cfg(all(
not(no_zerocopy_target_has_atomics_1_60_0),
any(
target_has_atomic = "8",
target_has_atomic = "16",
target_has_atomic = "32",
target_has_atomic = "64",
target_has_atomic = "ptr"
)
#[cfg(any(
target_has_atomic = "8",
target_has_atomic = "16",
target_has_atomic = "32",
target_has_atomic = "64",
target_has_atomic = "ptr"
))]
#[cfg_attr(doc_cfg, doc(cfg(rust = "1.60.0")))]
mod atomics {
Expand Down Expand Up @@ -1354,7 +1351,6 @@ mod simd {
// Rust 1.87. (Context in https://github.com/rust-lang/stdarch/issues/1484). Support is
// split in two different version ranges on top of the base configuration, requiring either
// little endian or the more recent version to be detected as well.
#[cfg(not(no_zerocopy_aarch64_simd_1_59_0))]
simd_arch_mod!(
#[cfg(all(
target_arch = "aarch64",
Expand Down Expand Up @@ -2371,7 +2367,7 @@ mod tests {
vector_signed_long,
vector_unsigned_long
);
#[cfg(all(target_arch = "aarch64", not(no_zerocopy_aarch64_simd_1_59_0)))]
#[cfg(target_arch = "aarch64")]
#[rustfmt::skip]
test_simd_arch_mod!(
aarch64, float32x2_t, float32x4_t, float64x1_t, float64x2_t, int8x8_t, int8x8x2_t,
Expand Down
2 changes: 1 addition & 1 deletion src/layout.rs
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Expand Up @@ -1402,7 +1402,7 @@ mod tests {
layout(size_info, align).validate_cast_and_convert_metadata(addr, bytes_len, cast_type)
}).map_err(|d| {
let msg = d.downcast::<&'static str>().ok().map(|s| *s.as_ref());
assert!(msg.is_some() || cfg!(no_zerocopy_panic_in_const_and_vec_try_reserve_1_57_0), "non-string panic messages are not permitted when usage of panic in const fn is enabled");
assert!(msg.is_some(), "non-string panic messages are not permitted when usage of panic in const fn is enabled");
msg
});
std::panic::set_hook(previous_hook);
Expand Down
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