metashell ☆

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Description:
Metaprogramming shell for C++ templates

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Developer tools

Tags: c++ metaprogramming templates debugging developer-tools repl

Install: brew install metashell

About:
Metashell is an interactive C++ template metaprogramming shell that enables developers to evaluate and debug template expressions in real-time. It provides a REPL environment for inspecting template instantiations, type deductions, and compiler errors. This tool significantly reduces the complexity of understanding complex template behaviors during development.

Key Features:

Interactive REPL for C++ templates
Real-time template evaluation and debugging
Cross-platform support (Windows, Linux, macOS)
Integration with Clang and Boost.MPL
Pretty-printing of complex types

Use Cases:

Debugging complex template metaprogramming errors
Learning and experimenting with C++ template techniques
Exploring type traits and template specializations
Validating template code during refactoring

Alternatives:

C++ Insights – Focuses on code transformation rather than interactive metaprogramming
Godbolt Compiler Explorer – Online compiler with broader language support but less metaprogramming focus

Version History

Detected	Version	Rev	Change	Commit
Sep 15, 2025 1:35am		0	VERSION_BUMP	3835c911
Sep 16, 2024 1:52pm		0	VERSION_BUMP	54610032