Crate features / allocator-api2
Feature flags · allocator-api2 0.4.0 · from crates.io 2026-10-24
allocator-api2 features: what each one does, and the line to copy
Short answerallocator-api2 0.4.0 has 4 features. By default it turns on std; add default-features = false to start from nothing. It needs Rust 1.64.0 or newer.
Pick features
Every feature
| Feature | In default | Turns on |
|---|---|---|
alloc | nothing else (a switch the code checks) | |
fresh-rust | nothing else (a switch the code checks) | |
serde | dep:serde_core | |
std | yes | alloc |
dep:x turns on the optional dependency x; x/y turns on feature y of dependency x (with ?, only if x is already on).
MSRV history
The minimum Rust version allocator-api2 declares (rust-version), and the release that changed it:
- 0.2.20 (2024-11-11): Rust 1.63
- 0.3.0 (2025-05-08): Rust 1.64.0
Stuck on an older compiler? Pin the last version that supports it, for example cargo update -p allocator-api2 --precise <version>, or use resolver 3, which picks compatible versions for you.
More on allocator-api2
Real downloads, dependents and alternatives: allocator-api2 crate data (1.7M real downloads a day, 167 dependents).
docs.rs feature list · crates.io · license MIT OR Apache-2.0 · edition 2018
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