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@youknowone youknowone commented Sep 2, 2025

by @Masterchef365

Summary by CodeRabbit

  • New Features
    • Added support for platforms without a standard library, enabling use in embedded and constrained environments.
    • Maintains full compatibility with existing APIs; no user-facing changes required.

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coderabbitai bot commented Sep 2, 2025

Walkthrough

The crate switches to no_std by adding crate-level attributes in src/lib.rs: enabling #![no_std] and importing extern crate alloc. No module structure or public APIs are changed.

Changes

Cohort / File(s) Change Summary
no_std migration
src/lib.rs
Added crate attributes #![no_std] and extern crate alloc; to move the crate to no_std while enabling heap allocation via alloc. No public API changes.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

I nudge the stars to “no_std” skies,
Pack light, with alloc by my side—surprise!
A hop, a skip, no APIs rearranged,
Just quieter steps through memory’s range.
Thump-thump! My paws approve this glide. 🐇✨

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Actionable comments posted: 0

Caution

Some comments are outside the diff and can’t be posted inline due to platform limitations.

⚠️ Outside diff range comments (1)
src/lib.rs (1)

100-116: Tests will fail under pure no_std because Vec isn’t in scope

If you keep unconditional no_std, the test module uses Vec without importing it (Vec isn’t in the core prelude). Either adopt the change above or import Vec from alloc here.

Apply (only needed if you keep no_std unconditionally):

 #[cfg(test)]
 mod tests {
-    use super::*;
+    use super::*;
+    use alloc::vec::Vec;
🧹 Nitpick comments (1)
src/lib.rs (1)

1-2: Gate no_std during tests and drop unnecessary alloc dependency

Unconditionally enabling no_std and importing alloc forces an unnecessary requirement on targets without an allocator and complicates testing. Prefer enabling no_std only outside tests so unit tests can use std seamlessly.

Apply:

-#![no_std]
-extern crate alloc;
+#![cfg_attr(not(test), no_std)]
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📥 Commits

Reviewing files that changed from the base of the PR and between 915de3a and 23a24d2.

📒 Files selected for processing (1)
  • src/lib.rs (1 hunks)

@youknowone youknowone merged commit 0468fcc into RustPython:master Sep 2, 2025
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2 participants