Crate catfive 

Catfive

Catfive is a category-5, fluent, zero-dependency schema and form validation library for Rust. Inspired by developer-friendly validation libraries, it lets you construct composable validation rules without procedural attribute macros (#[derive(...)]).

Key Features

• Macro-free: Clean, functional, and composable builder API.
• Zero dependencies: Core validation operates entirely on std.
• Cloneable Validators: All validators implement Clone for easy template reuse.
• Detailed errors & Custom Messages: Rules support println!-style placeholders (e.g. {char}, {min}, {count}) or closures.
• Form and Schema support: Validate untyped form payloads as well as strongly-typed Rust structs with nested schemas and refinements.
• Collections & Lists: Validate arrays and vectors with list(...).
• Optional Serde: Enable the serde Cargo feature to serialize validation errors to JSON for REST APIs.
• Optional Regex: Enable the regex Cargo feature for arbitrary pattern matching.

Re-exports

pub use error::FieldError;

pub use error::ValidationError;

pub use error::ValidationErrors;

pub use form::FormData;

pub use form::FormValidator;

pub use list::ListValidator;

pub use number::NumberValidator;

pub use schema::Schema;

pub use string::StringValidator;

pub use traits::Validator;

Modules

error

form

list

number

prelude

Convenient prelude module to import all essential traits and constructors.

schema

spek

string

traits

Functions

form

Creates a new form validator for key-value payloads.

list

Creates a new fluent list/array validator for collections of items.

number

Creates a new fluent numeric validator for any compatible number type.

schema

Creates a new strongly-typed schema validator for struct T.

string

Creates a new fluent string validator.