rust-errors-async
Use when the user hits "future cannot be sent between threads safely", "future is not Send", Pin/Unpin errors, lifetime errors inside an `async fn`, "cannot…
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Updated 11-16 00:04
Coding & development
41,212 results
rust-errors-borrow-checker
Use when the user hits borrow-checker error codes E0382 / E0502 / E0596 / E0499 / E0500 / E0716, asks "why can't I use this after move", "why can't I have &…
rust-errors-build-link
Use when the user hits linker errors ("linker `cc` not found", "undefined reference to", "could not find native static library"), duplicate-symbol errors from…
rust-errors-lifetimes
Use when the user hits lifetime-related error codes E0106 / E0623 / E0495 / E0700 / E0759 / E0515, or wonders why elision didn't infer their lifetime, or how…
rust-errors-runtime
Use when a Rust program panics at runtime: index out of bounds, unwrap on None / Err, integer overflow, division by zero, or the user must choose panic =…
rust-errors-thiserror-anyhow
Use when the user chooses an error-handling crate: `thiserror` for structured library errors, `anyhow` for opaque application errors, both together, or…
rust-impl-async-tokio
Use when the user sets up a tokio runtime, spawns tasks, uses `select!`, applies timeouts, manages cancellation, uses `JoinSet` for structured concurrency, or…
rust-impl-cargo-project
Use when the user sets up a new Cargo crate, edits Cargo.toml, adds dependencies, configures features (additive principle), tunes profiles, uses `[patch]` /…
rust-impl-channels
Use when the user picks a channel: std::sync::mpsc (sync), tokio::sync::mpsc (async), tokio::sync::oneshot (single value), tokio::sync::broadcast (fan-out),…
rust-impl-clap-cli
Use when the user builds a CLI with clap 4.x, uses derive Parser API or builder API, defines subcommands, custom value parsers, env-var fallback, or shell…
rust-impl-cross-compile
Use when the user cross-compiles to another target triple, uses `rustup target add`, uses the `cross` crate, configures per-target linker via…
rust-impl-ffi-bindgen
Use when the user binds a Rust library to C (cbindgen) or imports a C library into Rust (bindgen), declares `extern "C"` functions, uses `#[repr(C)]` types,…
rust-impl-no-std
Use when the user adds `#![no_std]`, supports embedded targets, needs the alloc crate, writes a `#[panic_handler]`, registers a `#[global_allocator]`, or…
rust-syntax-async-await
Use when the user writes `async fn`, awaits a future, uses AFIT (1.75) / RPITIT (1.75) / async closures (1.85), holds non-Send state across `.await`, needs the…
rust-syntax-borrowing
Use when the user writes code that triggers borrow-checker errors, asks "can I have & and &mut at the same time", encounters E0502 / E0499 / E0596, needs…
rust-syntax-edition-2024
Use when the user migrates a crate from edition 2021 to 2024, writes new edition-2024 code, hits the never-type fallback semantic change, encounters `unsafe…
rust-syntax-gats
Use when the user needs Generic Associated Types: `type Item<'a>` in a trait, the `LendingIterator` pattern, callback registries parameterised by lifetime, or…
rust-syntax-generics
Use when the user writes generic functions / types / impl blocks, needs trait bounds, where clauses, const generics, or wonders about monomorphization vs dyn…
rust-syntax-iterators-closures
Use when the user writes iterator chains (map / filter / fold / collect), implements `Iterator` manually, picks between `Fn` / `FnMut` / `FnOnce`, uses `move`…
rust-syntax-lifetimes
Use when the user must write a lifetime annotation, encounters E0106 / E0623 / E0495 / E0700 / E0759, needs to understand the three elision rules, the 'static…
rust-syntax-macros-declarative
Use when the user writes a `macro_rules!`, debugs a macro hygiene issue, counts tokens via TT-munching, picks fragment specifiers, handles repetitions, or uses…
rust-syntax-macros-procedural
Use when the user writes a derive macro / attribute macro / function-like proc-macro, parses TokenStream with `syn`, generates code with `quote!`, reports…
rust-syntax-ownership
Use when the user writes Rust code that triggers ownership-transfer compile errors, asks "why moved value", asks to choose between Copy / Clone / Drop,…
rust-syntax-pattern-matching
Use when the user writes a `match`, `if let`, `let else`, `while let`, an if-let chain (edition 2024 stable in 1.88), destructures a…