Search Results for "derive"

This is a Rust crate that provides a convenient derive macro (#[derive(Error)]) for implementing std::error::Error on your custom error types (structs or enums). The goal is to enable library authors to build expressive, typed error types, with readable Display implementations (via #[error("...")] annotations) as well as From conversions (#[from]), source tracking (#[source]), and optionally backtraces.

This is a workshop/repository by the Rust developer David Tolnay (dtolnay) intended to teach how to write Rust procedural macros (derive macros, function-like macros, attribute macros). The repo contains multiple toy/realistic macro projects drawn from real use-cases: e.g., derive(Builder), derive(CustomDebug), seq!, #[sorted], #[bitfield]. The README indicates the focus is on learning: parsing token streams, generating code, handling generics, attribute arguments, etc. ...

pgsodium is an encryption library extension for PostgreSQL using the libsodium library for high-level cryptographic algorithms. pgsodium can be used a straight interface to libsodium, but it can also use a powerful feature called Server Key Management where pgsodium loads an external secret key into memory that is never accessible to SQL. This inaccessible root key can then be used to derive sub-keys and keypairs by key id. This id (type bigint) can then be stored instead of the derived key.

Servant provides a type-level domain-specific language (DSL) in Haskell for describing web APIs. From a single API specification, developers can derive server implementations, client libraries, documentation, and more—ensuring consistency and type safety across the stack. We have a tutorial that introduces the core features of servant. After this article, you should be able to write your first server web services, learning the rest from the haddocks' examples. The core documentation can be found here. ...

Parser for Rust source code is a major Rust crate for parsing Rust source code (token streams) into a syntax tree (AST) that procedural macros can inspect or transform. The primary target is macro authors: you can parse TokenStreams into syn::File, syn::Item, syn::Expr, syn::Type, etc. It offers rich data structures, fine-grained parsing, span tracking (for error reporting), traversal and mutation APIs (visit, fold, visit_mut), printing back to tokens, and strong feature-gating so you only...

...It provides strongly typed helpers for creating synchronous and asynchronous Redux actions. Its reducer utilities infer state and action types while validating handlers at compile time. Helper types can derive action and state types directly from existing implementations. The library supports integrations with common asynchronous approaches such as redux-observable and redux-saga. It is distributed in CommonJS, ES module, and UMD formats and includes runtime tests, type tests, and performance benchmarks intended to preserve type safety and efficiency.

...It allows developers to represent streams of actions, state changes, and side effects as observable sequences, providing a powerful alternative to traditional middleware approaches. The library includes tools for creating smart components that derive their behavior from observable data streams instead of imperative state updates. It also introduces an observable-based middleware that complies with Flux Standard Actions, ensuring compatibility with Redux conventions. By leveraging RxJS, developers can compose complex asynchronous logic in a declarative and composable way. The project is particularly useful for applications that require real-time data handling, event streams, or complex side-effect management.