Migrate to Rust 2024.

Author: eddyb

Cargo.toml

@@ -5,7 +5,7 @@ repository = "https://github.com/rust-gpu/spirt"
 homepage = "https://github.com/rust-gpu/spirt"
 version = "0.4.0"
 authors = ["SPIR-T developers", "Embark <[email protected]>"]
-edition = "2021"
+edition = "2024"
 license = "MIT OR Apache-2.0"
 readme = "README.md"
 # FIXME(eddyb) should this point to the version built from `git`?

src/cfg.rs

@@ -82,7 +82,7 @@ impl ControlFlowGraph {
     pub fn rev_post_order(
         &self,
         func_def_body: &FuncDefBody,
-    ) -> impl DoubleEndedIterator<Item = Region> {
+    ) -> impl DoubleEndedIterator<Item = Region> + use<> {
         let mut post_order = SmallVec::<[_; 8]>::new();
         self.traverse_whole_func(
             func_def_body,

src/cfgssa.rs

@@ -564,7 +564,7 @@ mod data {
             self.contains(k).then(|| self.entry(k).remove().unwrap())
         }
 
-        pub fn keys(&self) -> impl Iterator<Item = K> {
+        pub fn keys(&self) -> impl Iterator<Item = K> + use<K, V, VS> {
             let mut i = 0;
             let mut remaining = self.occupied;
             iter::from_fn(move || {

src/print/mod.rs

@@ -1952,7 +1952,7 @@ impl AttrsAndDef {
         let mut maybe_def_end_anchor = pretty::Fragment::default();
         let mut name = name.into();
         if let [
-            pretty::Node::Anchor { is_def: ref mut original_anchor_is_def @ true, anchor, text: _ },
+            pretty::Node::Anchor { is_def: original_anchor_is_def @ true, anchor, text: _ },
             ..,
         ] = &mut name.nodes[..]
         {