artichoke_core/
lib.rs

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#![warn(clippy::all)]
#![warn(clippy::pedantic)]
#![warn(clippy::cargo)]
#![allow(unknown_lints)]
#![allow(clippy::manual_let_else)]
#![allow(clippy::module_name_repetitions)]
#![warn(missing_docs)]
#![warn(missing_debug_implementations)]
#![warn(missing_copy_implementations)]
#![warn(rust_2018_idioms)]
#![warn(rust_2021_compatibility)]
#![warn(trivial_casts, trivial_numeric_casts)]
#![warn(unused_qualifications)]
#![warn(variant_size_differences)]
#![forbid(unsafe_code)]
// Enable feature callouts in generated documentation:
// https://doc.rust-lang.org/beta/unstable-book/language-features/doc-cfg.html
//
// This approach is borrowed from tokio.
#![cfg_attr(docsrs, feature(doc_cfg))]
#![cfg_attr(docsrs, feature(doc_alias))]

//! This crate provides a set of traits that, when implemented, comprise a
//! complete Ruby interpreter.
//!
//! `artichoke-core` is `no_std` + `alloc` with an optional (enabled by default)
//! `std` feature.
//!
//! Interpreters implement the traits in Artichoke Core to indicate which
//! capabilities they offer. Defining interpreters by their capabilities allows
//! for interpreter agnostic implementations of Ruby Core and Standard Library.
//!
//! # Interpreter APIs
//!
//! Artichoke Core defines traits for the following interpreter capabilities:
//!
//! - [`ClassRegistry`][core-class-registry]: Define and store class specs for
//!   Ruby `Class`es.
//! - [`CoerceToNumeric`][core-coerce-numeric]: Coerce Ruby values to native
//!   numerics (floats and integers).
//! - [`Debug`][core-debug]: Provide debugging and `Exception` message support.
//! - [`DefineConstant`][core-define-constant]: Define global, class, and module
//!   constants to be arbitrary Ruby [`Value`][core-value]s.
//! - [`Eval`][core-eval]: Execute Ruby source code on an interpreter from
//!   various sources.
//! - [`Globals`][core-globals]: Get, set, and unset interpreter-level global
//!   variables.
//! - [`Hash`][core-hash]: Hashing functions such as building hashers.
//! - [`Intern`][core-intern]: Intern byte strings to a cheap to copy and compare
//!   symbol type.
//! - [`Io`][core-io]: External I/O APIs, such as writing to the standard output
//!   of the current process.
//! - [`LoadSources`][core-load-sources]: [Require][kernel#require] source code
//!   from interpreter disk or [`File`][core-file] gems.
//! - [`ModuleRegistry`][core-module-registry]: Define and store module spec for
//!   Ruby `Module`s.
//! - [`Parser`][core-parser]: Manipulate the parser state, e.g. setting the
//!   current filename.
//! - [`Prng`][core-prng]: An interpreter-level pseudorandom number generator
//!   that is the backend for [`Random::DEFAULT`].
//! - [`Regexp`][core-regexp]: Manipulate [`Regexp`][regexp-globals] global
//!   state.
//! - [`ReleaseMetadata`][core-releasemetadata]: Enable interpreters to describe
//!   themselves.
//! - [`TopSelf`][core-topself]: Access to the root execution context.
//! - [`Warn`][core-warn]: Emit warnings.
//!
//! [core-class-registry]: class_registry::ClassRegistry
//! [core-coerce-numeric]: coerce_to_numeric::CoerceToNumeric
//! [core-convert-module]: convert
//! [core-debug]: debug::Debug
//! [core-define-constant]: constant::DefineConstant
//! [core-value]: value::Value
//! [core-eval]: eval::Eval
//! [core-globals]: globals::Globals
//! [core-hash]: hash::Hash
//! [core-intern]: intern::Intern
//! [core-io]: io::Io
//! [core-load-sources]: load::LoadSources
//! [core-file]: file::File
//! [core-module-registry]: module_registry::ModuleRegistry
//! [core-parser]: parser::Parser
//! [core-prng]: prng::Prng
//! [core-regexp]: regexp::Regexp
//! [core-releasemetadata]: release_metadata::ReleaseMetadata
//! [core-topself]: top_self::TopSelf
//! [core-warn]: warn::Warn
//!
//! Artichoke Core also describes what capabilities a Ruby
//! [`Value`](value::Value) must have and how to [convert] between Ruby VM and
//! Rust types.
//!
//! # Examples
//!
//! [`artichoke-backend`](https://artichoke.github.io/artichoke/artichoke_backend/)
//! is one implementation of the `artichoke-core` traits.
//!
//! To use all the APIs defined in Artichoke Core, bring the traits into
//! scope by importing the prelude:
//!
//! ```
//! use artichoke_core::prelude::*;
//! ```
//!
//! # Crate features
//!
//! All features are enabled by default:
//!
//! - **std**: By default, `artichoke-core` is `no_std` + `alloc`. Enabling
//!   this feature adds several trait methods that depend on `OsStr` and `Path`
//!   as well as several implementations of `std::error::Error`.
//!
//! [Kernel#require]: https://ruby-doc.org/core-3.1.2/Kernel.html#method-i-require
//! [`Random::DEFAULT`]: https://ruby-doc.org/core-3.1.2/Random.html#DEFAULT
//! [`Regexp`]: https://ruby-doc.org/core-3.1.2/Regexp.html#class-Regexp-label-Special+global+variables
//! [convert]: crate::convert

#![no_std]
#![doc(html_root_url = "https://artichoke.github.io/artichoke/artichoke_core")]
#![doc(html_favicon_url = "https://www.artichokeruby.org/favicon-32x32.png")]
#![doc(html_logo_url = "https://www.artichokeruby.org/artichoke-logo.svg")]

// Ensure code blocks in `README.md` compile
#[cfg(doctest)]
#[doc = include_str!("../README.md")]
mod readme {}

extern crate alloc;
#[cfg(feature = "std")]
extern crate std;

pub mod class_registry;
pub mod coerce_to_numeric;
pub mod constant;
pub mod convert;
pub mod debug;
pub mod eval;
pub mod file;
pub mod globals;
pub mod hash;
pub mod intern;
pub mod io;
pub mod load;
pub mod module_registry;
pub mod parser;
pub mod prng;
pub mod regexp;
pub mod release_metadata;
pub mod top_self;
pub mod types;
pub mod value;
pub mod warn;

/// A "prelude" for users of the `artichoke-core` crate.
///
/// This prelude is similar to the standard library's prelude in that you'll
/// almost always want to import its entire contents, but unlike the standard
/// library's prelude, you'll have to do so manually:
///
/// ```
/// use artichoke_core::prelude::*;
/// ```
///
/// The prelude may grow over time as additional items see ubiquitous use.
pub mod prelude {
    pub use crate::class_registry::ClassRegistry;
    pub use crate::coerce_to_numeric::CoerceToNumeric;
    pub use crate::constant::DefineConstant;
    pub use crate::convert::{Convert, ConvertMut, TryConvert, TryConvertMut};
    pub use crate::debug::Debug;
    pub use crate::eval::Eval;
    pub use crate::file::File;
    pub use crate::globals::Globals;
    pub use crate::hash::Hash;
    pub use crate::intern::Intern;
    pub use crate::io::Io;
    pub use crate::load::LoadSources;
    pub use crate::module_registry::ModuleRegistry;
    pub use crate::parser::{IncrementLinenoError, Parser};
    pub use crate::prng::Prng;
    pub use crate::regexp::Regexp;
    pub use crate::release_metadata::ReleaseMetadata;
    pub use crate::top_self::TopSelf;
    pub use crate::types::{Ruby, Rust};
    pub use crate::value::Value;
    pub use crate::warn::Warn;
}