Crate grift_std 

Grift Standard Library

Standard library features for the Grift R7RS-compliant Scheme implementation that require Rust’s std (I/O, filesystem, etc.).

This crate implements the IoProvider trait from grift_core using Rust’s standard I/O, giving the no_std evaluator access to real input/output when running on a hosted platform.

Quick Start

use grift_std::StdIoProvider;
use grift_core::IoProvider;

// Create a standard I/O provider
let mut io = StdIoProvider::new();

// Check port types
use grift_core::PortId;
assert!(io.is_input_port(PortId::STDIN));
assert!(io.is_output_port(PortId::STDOUT));

Crate Boundary

Crate	#![no_std]	Purpose
grift_core	✅	Defines IoProvider trait
grift_std	❌	Implements IoProvider with std::io
grift_eval	✅	Pure evaluator, no I/O
grift_repl	❌	Interactive REPL

Structs

DisplayPort

Write a Value through an IoProvider port.

NullIoProvider

A no-op I/O provider that silently discards all output and returns IoErrorKind::Unsupported for reads.

PortId

Identifies an I/O port.

StdIoProvider

An IoProvider implementation backed by Rust’s standard I/O.

Enums

IoErrorKind

Error kinds for I/O operations in no_std environments.

Traits

IoProvider

Trait for providing I/O operations to the evaluator.

Type Aliases

IoResult

Result type for I/O operations.