Radar · Rust · Archive · Week 39 · Sep 22 – 28, 2025

Variadic Generics Micro Survey

Worth knowinglanguage

What changed: The Rust team conducted a micro survey about variadic generics.
Production impact: The source does not say.
Try it: Read the survey results on the blog post.
Source: blog.rust-lang.org/inside-rust/2025/09/22/variadic-generics-micro-survey/

Understand it, then run it

The Rust team has started a short survey to learn how people feel about variadic generics. Variadic generics let a type or function accept an arbitrary number of type parameters, similar to how functions can accept a variable number of arguments. The survey is open to anyone, even those who are new to Rust, and it will help shape future discussions about adding this feature to the language.

Run it now

Todayrust

// This program demonstrates that no new variadic‑generics API is available in Rust 1.98.1.
// It simply prints a message reminding us that the feature is still under discussion.
fn main() {
    println!("Variadic generics are not yet part of Rust 1.98.1. The survey is collecting opinions for future RFCs.");
}

What it printed when we ran it on Rust 1.98.1 (edition 2024)

Variadic generics are not yet part of Rust 1.98.1. The survey is collecting opinions for future RFCs.

Run sends this program (for Solidity, the contract and its tests) to our own sandbox, where it is compiled and run once, with no network, and what it printed or the test report comes back here. Nothing is kept. Runs are counted per visitor for the day so everyone gets a turn; the details are on the legal page.

Written by gpt-oss-20b from the linked source · claims checked against the sources · archive, not individually reviewed