Forked version of index_vec.
This crate provides several optional features:
rayon- Enables parallel iteration support via Rayonserde- Enables serialization/deserialization support via Serdenonmax- Enablesdefine_nonmax_u32_index_type!macro for memory-efficient index types usingNonMaxU32
Add this to your Cargo.toml:
[dependencies]
oxc_index = "3.1"
# Enable optional features as needed:
# oxc_index = { version = "3.1", features = ["serde", "nonmax"] }use oxc_index::{IndexVec, define_index_type};
define_index_type! {
pub struct MyIdx = u32;
}
let mut vec: IndexVec<MyIdx, &str> = IndexVec::new();
let idx = vec.push("hello");
assert_eq!(vec[idx], "hello");The define_nonmax_u32_index_type! macro creates index types backed by NonMaxU32,
which uses the niche optimization to store Option<MyIdx> in the same space as MyIdx:
use oxc_index::{IndexVec, define_nonmax_u32_index_type};
define_nonmax_u32_index_type! {
pub struct CompactIdx;
}
// Option<CompactIdx> is the same size as CompactIdx (4 bytes)
assert_eq!(
std::mem::size_of::<CompactIdx>(),
std::mem::size_of::<Option<CompactIdx>>()
);
let mut vec: IndexVec<CompactIdx, String> = IndexVec::new();
let idx = vec.push("world".to_string());All index types and IndexVec automatically support Serde serialization when the serde feature is enabled:
use oxc_index::{IndexVec, define_index_type};
use serde::{Serialize, Deserialize};
define_index_type! {
pub struct MyIdx = u32;
}
#[derive(Serialize, Deserialize)]
struct MyData {
items: IndexVec<MyIdx, String>,
}Compared to the original index_vec:
rayonfeature - Parallel iteration supportserdefeature - Automatic serialization support using the crate's own serde dependencynonmaxfeature - Memory-efficient index types withdefine_nonmax_u32_index_type!macro- Const support - Many methods are now
const fnwhere possible - Proc macro compatibility - Macros work seamlessly with custom derive attributes like
#[ast],#[estree(skip)], etc.