crystal-icr ☆
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Description:
Interactive console for Crystal programming language
Type: Formula  |  Latest Version: 0.9.0@3  |  Tracked Since: Dec 17, 2025
Links: Homepage  |  formulae.brew.sh
Category: Developer tools
Tags: repl crystal interactive development console
Install: brew install crystal-icr
About:
ICR (Interactive Crystal) is a REPL (Read-Eval-Print Loop) environment for the Crystal programming language. It provides a powerful interactive shell with syntax highlighting, auto-completion, and multi-line editing. It allows developers to test code snippets, inspect objects, and explore APIs in real-time without compiling full programs.
Key Features:
  • Syntax highlighting and auto-completion
  • Multi-line editing with readline support
  • Persistent history across sessions
  • Integration with existing Crystal toolchain
Use Cases:
  • Testing Crystal code snippets interactively
  • Learning and exploring the Crystal language
  • Debugging and inspecting objects at runtime
  • Rapid prototyping of algorithms
Alternatives:
  • irb – Ruby's REPL; ICR provides similar functionality specifically optimized for Crystal's syntax and type system
  • crystal play – Official playground; ICR is a local CLI tool rather than web-based
License: MIT
Dependencies: bdw-gc, crystal, libevent, libyaml, openssl@3, pcre2, readline
Bottles available for: arm64_tahoe, arm64_sequoia, arm64_sonoma, arm64_ventura, arm64_monterey, sonoma, ventura, monterey, arm64_linux, x86_64_linux
Version History
Detected Version Rev Change Commit
Sep 13, 2025 8:10pm 3 VERSION_BUMP 73b52359
Dec 9, 2023 8:31pm 3 VERSION_BUMP b491579a
Nov 30, 2022 6:07am 0 VERSION_BUMP 56cdfdb1
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