refactor(allocator): move Box and Vec into separate files (#5034)

Pure refactor. Split `Box` and `Vec` definitions into separate files. Definitions are completely unchanged.

crates/oxc_allocator/src/boxed.rs

@@ -1,5 +1,6 @@
-//! Bumpalo memory arena utilities
-//! Copied from [jsparagus](https://github.com/mozilla-spidermonkey/jsparagus/blob/master/crates/ast/src/arena.rs)
+//! Arena Box.
+//!
+//! Originally based on [jsparagus](https://github.com/mozilla-spidermonkey/jsparagus/blob/master/crates/ast/src/arena.rs)
 
 use std::{
     self,
@@ -10,11 +11,8 @@ use std::{
     ptr::{self, NonNull},
 };
 
-use allocator_api2::vec;
-pub use bumpalo::collections::String;
-use bumpalo::Bump;
 #[cfg(any(feature = "serialize", test))]
-use serde::{ser::SerializeSeq, Serialize, Serializer};
+use serde::{Serialize, Serializer};
 
 use crate::Allocator;
 
@@ -107,111 +105,6 @@ impl<'alloc, T: Hash> Hash for Box<'alloc, T> {
     }
 }
 
-/// Bumpalo Vec
-#[derive(Debug, PartialEq, Eq)]
-pub struct Vec<'alloc, T>(vec::Vec<T, &'alloc Bump>);
-
-impl<'alloc, T> Vec<'alloc, T> {
-    #[inline]
-    pub fn new_in(allocator: &'alloc Allocator) -> Self {
-        Self(vec::Vec::new_in(allocator))
-    }
-
-    #[inline]
-    pub fn with_capacity_in(capacity: usize, allocator: &'alloc Allocator) -> Self {
-        Self(vec::Vec::with_capacity_in(capacity, allocator))
-    }
-
-    #[inline]
-    pub fn from_iter_in<I: IntoIterator<Item = T>>(iter: I, allocator: &'alloc Allocator) -> Self {
-        let iter = iter.into_iter();
-        let capacity = iter.size_hint().1.unwrap_or(0);
-        let mut vec = vec::Vec::with_capacity_in(capacity, &**allocator);
-        vec.extend(iter);
-        Self(vec)
-    }
-}
-
-impl<'alloc, T> ops::Deref for Vec<'alloc, T> {
-    type Target = vec::Vec<T, &'alloc Bump>;
-
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
-impl<'alloc, T> ops::DerefMut for Vec<'alloc, T> {
-    fn deref_mut(&mut self) -> &mut vec::Vec<T, &'alloc Bump> {
-        &mut self.0
-    }
-}
-
-impl<'alloc, T> IntoIterator for Vec<'alloc, T> {
-    type IntoIter = <vec::Vec<T, &'alloc Bump> as IntoIterator>::IntoIter;
-    type Item = T;
-
-    fn into_iter(self) -> Self::IntoIter {
-        self.0.into_iter()
-    }
-}
-
-impl<'alloc, T> IntoIterator for &'alloc Vec<'alloc, T> {
-    type IntoIter = std::slice::Iter<'alloc, T>;
-    type Item = &'alloc T;
-
-    fn into_iter(self) -> Self::IntoIter {
-        self.0.iter()
-    }
-}
-
-impl<'alloc, T> ops::Index<usize> for Vec<'alloc, T> {
-    type Output = T;
-
-    fn index(&self, index: usize) -> &Self::Output {
-        self.0.index(index)
-    }
-}
-
-impl<'alloc, T> ops::Index<usize> for &'alloc Vec<'alloc, T> {
-    type Output = T;
-
-    fn index(&self, index: usize) -> &Self::Output {
-        self.0.index(index)
-    }
-}
-
-// Unused right now.
-// impl<'alloc, T> ops::IndexMut<usize> for Vec<'alloc, T> {
-// fn index_mut(&mut self, index: usize) -> &mut Self::Output {
-// self.0.index_mut(index)
-// }
-// }
-
-#[cfg(any(feature = "serialize", test))]
-impl<'alloc, T> Serialize for Vec<'alloc, T>
-where
-    T: Serialize,
-{
-    fn serialize<S>(&self, s: S) -> Result<S::Ok, S::Error>
-    where
-        S: Serializer,
-    {
-        let mut seq = s.serialize_seq(Some(self.0.len()))?;
-        for e in &self.0 {
-            seq.serialize_element(e)?;
-        }
-        seq.end()
-    }
-}
-
-impl<'alloc, T: Hash> Hash for Vec<'alloc, T> {
-    fn hash<H: Hasher>(&self, state: &mut H) {
-        for e in &self.0 {
-            e.hash(state);
-        }
-    }
-}
-
 /// Memory address of an AST node in arena.
 ///
 /// `Address` is generated from a `Box<T>`.
@@ -231,7 +124,9 @@ impl<'a, T> Box<'a, T> {
 mod test {
     use std::hash::{DefaultHasher, Hash, Hasher};
 
-    use crate::{Allocator, Box, Vec};
+    use crate::Allocator;
+
+    use super::Box;
 
     #[test]
     fn box_deref_mut() {
@@ -265,15 +160,6 @@ mod test {
         assert_eq!(hash(&a), hash(&b));
     }
 
-    #[test]
-    fn vec_debug() {
-        let allocator = Allocator::default();
-        let mut v = Vec::new_in(&allocator);
-        v.push("x");
-        let v = format!("{v:?}");
-        assert_eq!(v, "Vec([\"x\"])");
-    }
-
     #[test]
     fn box_serialize() {
         let allocator = Allocator::default();
@@ -282,22 +168,10 @@ mod test {
         assert_eq!(b, "\"x\"");
     }
 
-    #[test]
-    fn vec_serialize() {
-        let allocator = Allocator::default();
-        let mut v = Vec::new_in(&allocator);
-        v.push("x");
-        let v = serde_json::to_string(&v).unwrap();
-        assert_eq!(v, "[\"x\"]");
-    }
-
     #[test]
     fn lifetime_variance() {
         fn _assert_box_variant_lifetime<'a: 'b, 'b, T>(program: Box<'a, T>) -> Box<'b, T> {
             program
         }
-        fn _assert_vec_variant_lifetime<'a: 'b, 'b, T>(program: Vec<'a, T>) -> Vec<'b, T> {
-            program
-        }
     }
 }

crates/oxc_allocator/src/lib.rs

@@ -3,15 +3,18 @@ use std::{
     ops::{Deref, DerefMut},
 };
 
-mod arena;
-mod clone_in;
-mod convert;
-
+pub use bumpalo::collections::String;
 use bumpalo::Bump;
 
-pub use arena::{Address, Box, String, Vec};
+mod boxed;
+mod clone_in;
+mod convert;
+mod vec;
+
+pub use boxed::{Address, Box};
 pub use clone_in::CloneIn;
 pub use convert::{FromIn, IntoIn};
+pub use vec::Vec;
 
 #[derive(Default)]
 pub struct Allocator {

crates/oxc_allocator/src/vec.rs

@@ -0,0 +1,154 @@
+//! Arena Vec.
+//!
+//! Originally based on [jsparagus](https://github.com/mozilla-spidermonkey/jsparagus/blob/master/crates/ast/src/arena.rs)
+
+use std::{
+    self,
+    fmt::Debug,
+    hash::{Hash, Hasher},
+    ops,
+};
+
+use allocator_api2::vec;
+use bumpalo::Bump;
+#[cfg(any(feature = "serialize", test))]
+use serde::{ser::SerializeSeq, Serialize, Serializer};
+
+use crate::Allocator;
+
+/// Bumpalo Vec
+#[derive(Debug, PartialEq, Eq)]
+pub struct Vec<'alloc, T>(vec::Vec<T, &'alloc Bump>);
+
+impl<'alloc, T> Vec<'alloc, T> {
+    #[inline]
+    pub fn new_in(allocator: &'alloc Allocator) -> Self {
+        Self(vec::Vec::new_in(allocator))
+    }
+
+    #[inline]
+    pub fn with_capacity_in(capacity: usize, allocator: &'alloc Allocator) -> Self {
+        Self(vec::Vec::with_capacity_in(capacity, allocator))
+    }
+
+    #[inline]
+    pub fn from_iter_in<I: IntoIterator<Item = T>>(iter: I, allocator: &'alloc Allocator) -> Self {
+        let iter = iter.into_iter();
+        let capacity = iter.size_hint().1.unwrap_or(0);
+        let mut vec = vec::Vec::with_capacity_in(capacity, &**allocator);
+        vec.extend(iter);
+        Self(vec)
+    }
+}
+
+impl<'alloc, T> ops::Deref for Vec<'alloc, T> {
+    type Target = vec::Vec<T, &'alloc Bump>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl<'alloc, T> ops::DerefMut for Vec<'alloc, T> {
+    fn deref_mut(&mut self) -> &mut vec::Vec<T, &'alloc Bump> {
+        &mut self.0
+    }
+}
+
+impl<'alloc, T> IntoIterator for Vec<'alloc, T> {
+    type IntoIter = <vec::Vec<T, &'alloc Bump> as IntoIterator>::IntoIter;
+    type Item = T;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.0.into_iter()
+    }
+}
+
+impl<'alloc, T> IntoIterator for &'alloc Vec<'alloc, T> {
+    type IntoIter = std::slice::Iter<'alloc, T>;
+    type Item = &'alloc T;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.0.iter()
+    }
+}
+
+impl<'alloc, T> ops::Index<usize> for Vec<'alloc, T> {
+    type Output = T;
+
+    fn index(&self, index: usize) -> &Self::Output {
+        self.0.index(index)
+    }
+}
+
+impl<'alloc, T> ops::Index<usize> for &'alloc Vec<'alloc, T> {
+    type Output = T;
+
+    fn index(&self, index: usize) -> &Self::Output {
+        self.0.index(index)
+    }
+}
+
+// Unused right now.
+// impl<'alloc, T> ops::IndexMut<usize> for Vec<'alloc, T> {
+// fn index_mut(&mut self, index: usize) -> &mut Self::Output {
+// self.0.index_mut(index)
+// }
+// }
+
+#[cfg(any(feature = "serialize", test))]
+impl<'alloc, T> Serialize for Vec<'alloc, T>
+where
+    T: Serialize,
+{
+    fn serialize<S>(&self, s: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        let mut seq = s.serialize_seq(Some(self.0.len()))?;
+        for e in &self.0 {
+            seq.serialize_element(e)?;
+        }
+        seq.end()
+    }
+}
+
+impl<'alloc, T: Hash> Hash for Vec<'alloc, T> {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        for e in &self.0 {
+            e.hash(state);
+        }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use crate::Allocator;
+
+    use super::Vec;
+
+    #[test]
+    fn vec_debug() {
+        let allocator = Allocator::default();
+        let mut v = Vec::new_in(&allocator);
+        v.push("x");
+        let v = format!("{v:?}");
+        assert_eq!(v, "Vec([\"x\"])");
+    }
+
+    #[test]
+    fn vec_serialize() {
+        let allocator = Allocator::default();
+        let mut v = Vec::new_in(&allocator);
+        v.push("x");
+        let v = serde_json::to_string(&v).unwrap();
+        assert_eq!(v, "[\"x\"]");
+    }
+
+    #[test]
+    fn lifetime_variance() {
+        fn _assert_vec_variant_lifetime<'a: 'b, 'b, T>(program: Vec<'a, T>) -> Vec<'b, T> {
+            program
+        }
+    }
+}