From 36589700cc3d70f37928be47369ee2cd95956ed3 Mon Sep 17 00:00:00 2001
From: Stephan Boyer <stephan@stephanboyer.com>
Date: Sun, 6 Jul 2025 02:44:41 -0600
Subject: [PATCH] Update Rust to v1.88.0

---
 .github/workflows/ci.yml | 12 ++++++------
 src/generate_rust.rs     |  5 ++---
 test_data/types.rs       |  5 ++---
 toast.yml                | 12 ++++++------
 4 files changed, 16 insertions(+), 18 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 576159ec..1fef0a71 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -90,8 +90,8 @@ jobs:
         #   https://github.com/rust-lang/rustup/issues/2441
         #
         # for more information.
-        rustup toolchain install 1.87.0 --no-self-update # [ref:rust_1.87.0]
-        rustup default 1.87.0 # [ref:rust_1.87.0]
+        rustup toolchain install 1.88.0 --no-self-update # [ref:rust_1.88.0]
+        rustup default 1.88.0 # [ref:rust_1.88.0]
 
         # Add the targets.
         rustup target add x86_64-pc-windows-msvc
@@ -131,8 +131,8 @@ jobs:
         set -euxo pipefail
 
         # Install the appropriate version of Rust.
-        rustup toolchain install 1.87.0 # [ref:rust_1.87.0]
-        rustup default 1.87.0 # [ref:rust_1.87.0]
+        rustup toolchain install 1.88.0 # [ref:rust_1.88.0]
+        rustup default 1.88.0 # [ref:rust_1.88.0]
 
         # Add the targets.
         rustup target add x86_64-apple-darwin
@@ -207,8 +207,8 @@ jobs:
         set -euxo pipefail
 
         # Install the appropriate version of Rust.
-        rustup toolchain install 1.87.0 # [ref:rust_1.87.0]
-        rustup default 1.87.0 # [ref:rust_1.87.0]
+        rustup toolchain install 1.88.0 # [ref:rust_1.88.0]
+        rustup default 1.88.0 # [ref:rust_1.88.0]
 
         # Fetch the program version.
         VERSION="$(cargo pkgid | cut -d# -f2 | cut -d: -f2)"
diff --git a/src/generate_rust.rs b/src/generate_rust.rs
index e5d76d08..00b12145 100644
--- a/src/generate_rust.rs
+++ b/src/generate_rust.rs
@@ -140,7 +140,6 @@ pub fn generate(
 use std::{{
     cmp::min,
     io::{{self, BufRead, Error, ErrorKind, Write}},
-    mem::transmute,
 }};
 
 const MISSING_FIELDS_ERROR_MESSAGE: &str = \"Struct missing one or more required field(s).\";
@@ -156,11 +155,11 @@ pub trait Deserialize: Sized {{
 }}
 
 fn zigzag_encode(value: i64) -> u64 {{
-    unsafe {{ transmute::<i64, u64>(value >> 63_u32) ^ transmute::<i64, u64>(value << 1_u32) }}
+    i64::cast_unsigned(value >> 63_u32) ^ i64::cast_unsigned(value << 1_u32)
 }}
 
 fn zigzag_decode(value: u64) -> i64 {{
-    unsafe {{ transmute::<u64, i64>(value >> 1_u32) ^ -transmute::<u64, i64>(value & 1) }}
+    u64::cast_signed(value >> 1_u32) ^ -u64::cast_signed(value & 1)
 }}
 
 fn varint_size_from_value(value: u64) -> usize {{
diff --git a/test_data/types.rs b/test_data/types.rs
index 7d202849..8cc02154 100644
--- a/test_data/types.rs
+++ b/test_data/types.rs
@@ -4,7 +4,6 @@
 use std::{
     cmp::min,
     io::{self, BufRead, Error, ErrorKind, Write},
-    mem::transmute,
 };
 
 const MISSING_FIELDS_ERROR_MESSAGE: &str = "Struct missing one or more required field(s).";
@@ -20,11 +19,11 @@ pub trait Deserialize: Sized {
 }
 
 fn zigzag_encode(value: i64) -> u64 {
-    unsafe { transmute::<i64, u64>(value >> 63_u32) ^ transmute::<i64, u64>(value << 1_u32) }
+    i64::cast_unsigned(value >> 63_u32) ^ i64::cast_unsigned(value << 1_u32)
 }
 
 fn zigzag_decode(value: u64) -> i64 {
-    unsafe { transmute::<u64, i64>(value >> 1_u32) ^ -transmute::<u64, i64>(value & 1) }
+    u64::cast_signed(value >> 1_u32) ^ -u64::cast_signed(value & 1)
 }
 
 fn varint_size_from_value(value: u64) -> usize {
diff --git a/toast.yml b/toast.yml
index 3868537a..75c9e0ec 100644
--- a/toast.yml
+++ b/toast.yml
@@ -17,11 +17,11 @@ command_prefix: |
   cargo-offline () { cargo --frozen --offline "$@"; }
 
   # Use this wrapper for formatting code or checking that code is formatted. We use a nightly Rust
-  # version for the `trailing_comma` formatting option [tag:rust_fmt_nightly_2025-05-17]. The
+  # version for the `trailing_comma` formatting option [tag:rust_fmt_nightly_2025-07-06]. The
   # nightly version was chosen as the latest available release with all components present
   # according to this page:
   #   https://rust-lang.github.io/rustup-components-history/x86_64-unknown-linux-gnu.html
-  cargo-fmt () { cargo +nightly-2025-05-17 --frozen --offline fmt --all -- "$@"; }
+  cargo-fmt () { cargo +nightly-2025-07-06 --frozen --offline fmt --all -- "$@"; }
 
   # Load the NVM startup file, if it exists.
   if [ -f "$HOME/.nvm/nvm.sh" ]; then
@@ -75,18 +75,18 @@ tasks:
       - install_packages
       - create_user
     command: |
-      # Install stable Rust [tag:rust_1.87.0].
+      # Install stable Rust [tag:rust_1.88.0].
       curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- \
         -y \
-        --default-toolchain 1.87.0 \
+        --default-toolchain 1.88.0 \
         --profile minimal \
         --component clippy
 
       # Add Rust tools to `$PATH`.
       . "$HOME/.cargo/env"
 
-      # Install nightly Rust [ref:rust_fmt_nightly_2025-05-17].
-      rustup toolchain install nightly-2025-05-17 --profile minimal --component rustfmt
+      # Install nightly Rust [ref:rust_fmt_nightly_2025-07-06].
+      rustup toolchain install nightly-2025-07-06 --profile minimal --component rustfmt
 
   install_node:
     description: Install Node.js, a JavaScript runtime environment.