# vgvassilev/cling

The interactive C++ interpreter Cling

Repository: https://github.com/vgvassilev/cling
Canonical: https://ross.abutalabs.com/products/vgvassilev-cling
Homepage: https://rawgit.com/vgvassilev/cling/master/www/index.html
Language: C++
License: NOASSERTION
License Family: other
Last push: 2026-07-30T07:05:32+00:00

## Health v2 (maintenance only)
Score: 76/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 95, release rhythm 38, longevity 100
- inputs: {"age_days": 4601, "days_push": 34, "days_rel": 203, "gap_med": 427, "n_releases_24m": 2}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1808, forks 100 (observed 2026-08-28T04:05:39.357337+00:00)

## What it is
Cling is an interactive C++ interpreter built on top of Clang and LLVM, implementing a read-eval-print loop (REPL) for rapid C++ development. It is developed primarily under the root-project organization and leverages Clang's compiler diagnostics for an interactive experience.

## Use cases
- run C++ code interactively in a REPL
- experiment with C++ snippets without writing a full program
- rapid prototyping of C++ algorithms
- teach and learn C++ interactively
- incrementally load and test C++ libraries
- embed a C++ interpreter in an application

## When to choose
- you want a REPL for C++ similar to Python's interactive shell
- you need on-the-fly C++ interpretation for teaching or prototyping
- you want to script C++ without a compile-link-run cycle
- you work with ROOT or scientific computing workflows that use Cling

## When to avoid
- you need a production compiler rather than an interpreter
- you require a lightweight tool without heavy LLVM/Clang dependencies
- you need a stable binary release and cannot build from source
- your project targets only the latest C++ standards beyond what Cling supports

## Facets
- artifact type: cli-tool
- maturity: active
- function: interpreter, compiler, developer-tools, cli
- domain: developer-tools, programming-languages, compilers
- platform: windows, cpp, cli
- tags: repl, clang, llvm, cpp-interpreter, interactive-cpp, jupyter, command-line, linux, macos

## Member repositories
- vgvassilev/cling (main) score 76

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:39.357337+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:21:24.656524+00:00, confidence not recorded.
  - readme: https://github.com/vgvassilev/cling (fetched 2026-08-28T04:05:39.357337+00:00, sha f811a6dba39f)
- Data as of 2026-08-30T08:39:29.467469+00:00.