{"id":13782443,"url":"https://github.com/rameshvarun/dumblisp","last_synced_at":"2026-01-21T16:35:17.791Z","repository":{"id":70661621,"uuid":"38221442","full_name":"rameshvarun/dumblisp","owner":"rameshvarun","description":"A lisp interpreter written in pure C.","archived":false,"fork":false,"pushed_at":"2023-03-31T00:34:23.000Z","size":71,"stargazers_count":2,"open_issues_count":4,"forks_count":0,"subscribers_count":2,"default_branch":"master","last_synced_at":"2025-04-05T01:35:47.638Z","etag":null,"topics":["lisp","lisp-interpreter","programming-language"],"latest_commit_sha":null,"homepage":"","language":"C","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/rameshvarun.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null}},"created_at":"2015-06-29T01:32:22.000Z","updated_at":"2023-04-01T10:57:24.000Z","dependencies_parsed_at":"2024-01-07T23:05:46.663Z","dependency_job_id":"6e6885e2-c37e-4384-a159-3375e4d43059","html_url":"https://github.com/rameshvarun/dumblisp","commit_stats":null,"previous_names":[],"tags_count":1,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/rameshvarun%2Fdumblisp","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/rameshvarun%2Fdumblisp/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/rameshvarun%2Fdumblisp/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/rameshvarun%2Fdumblisp/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/rameshvarun","download_url":"https://codeload.github.com/rameshvarun/dumblisp/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":247730069,"owners_count":20986404,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["lisp","lisp-interpreter","programming-language"],"created_at":"2024-08-03T18:01:37.184Z","updated_at":"2026-01-21T16:35:17.740Z","avatar_url":"https://github.com/rameshvarun.png","language":"C","funding_links":[],"categories":["C"],"sub_categories":[],"readme":"# Dumblisp\n\n[![C](https://github.com/rameshvarun/dumblisp/actions/workflows/c-cpp.yml/badge.svg)](https://github.com/rameshvarun/dumblisp/actions/workflows/c-cpp.yml)\n\nA dumb lisp interpreter, made for practice.\n\n\u003c!-- START doctoc generated TOC please keep comment here to allow auto update --\u003e\n\u003c!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE --\u003e\n\n\n- [Features](#features)\n- [Compiling](#compiling)\n- [Built-in Functions](#built-in-functions)\n  - [I/O Utilities](#io-utilities)\n    - [(print a b ...)](#print-a-b-)\n  - [Function / Macro Creation](#function--macro-creation)\n    - [(defun name (arg-a arg-b ...) stmnt-a stmnt-b ...)](#defun-name-arg-a-arg-b--stmnt-a-stmnt-b-)\n    - [(lambda (arg-a arg-b ...) stmnt-a stmnt-b ...)](#lambda-arg-a-arg-b--stmnt-a-stmnt-b-)\n    - [(defmacro name (arg-a arg-b ...) stmnt-a stmnt-b ...)](#defmacro-name-arg-a-arg-b--stmnt-a-stmnt-b-)\n    - [Variable arguments](#variable-arguments)\n  - [Scope / Variable Manipulation](#scope--variable-manipulation)\n    - [(let ((var-a val-a) (var-b val-b) ...) expr-a expr-b ...)](#let-var-a-val-a-var-b-val-b--expr-a-expr-b-)\n    - [(set symbol value)](#set-symbol-value)\n  - [Control Flow](#control-flow)\n    - [(if cond true-expr false-expr)](#if-cond-true-expr-false-expr)\n    - [(while cond stmt-a stmnt-b ...)](#while-cond-stmt-a-stmnt-b-)\n    - [(case var (value-a stmnts...) (value-b stmnts...))](#case-var-value-a-stmnts-value-b-stmnts)\n  - [Other Builtins](#other-builtins)\n\n\u003c!-- END doctoc generated TOC please keep comment here to allow auto update --\u003e\n\n## Features\n- A libreadline-based REPL\n- [Create `lambda` functions with closures](tests/closures.lisp)\n  - [Emulate OOP](tests/oop.lisp)\n- [Create macros](tests/macro.lisp)\n- Garbage collection using the Boehm GC\n- It's dumb\n\n## Compiling\n```bash\n# Install dependencies.\nsudo apt-get install libreadline-dev libgc-dev # On Linux\nbrew install bdw-gc # On Mac OSX\n\n# Get the source.\ngit clone https://github.com/rameshvarun/dumblisp.git\ncd dumblisp\nmake \u0026\u0026 make test\n```\n\n## Built-in Functions\n### I/O Utilities\n#### (print a b ...)\n`print` can be used to write to stdout. Print takes at least 1 argument.\n```lisp\n(print \"Hello World\" 3)\n```\n\n### Function / Macro Creation\n#### (defun name (arg-a arg-b ...) stmnt-a stmnt-b ...)\n```lisp\n(defun fib (n)\n  (if (or (= n 0) (= n 1))\n    1\n    (+ (fib (- n 1)) (fib (- n 2)))))\n```\n\n#### (lambda (arg-a arg-b ...) stmnt-a stmnt-b ...)\n```lisp\n(defun create-counter ()\n  (print \"Creating new counter...\")\n  (let ((i 0)) ; Start counter at 0\n    (lambda ()\n      (set i (+ i 1))\n      i)))\n```\n\n#### (defmacro name (arg-a arg-b ...) stmnt-a stmnt-b ...)\nMacros essentially act like functions that take in their arguments as literal expressions, returning an expression that is then immediately evaluated.\n```lisp\n(defmacro ++ (x)\n  (list 'set x (list '+ x 1)))\n```\n\n#### Variable arguments\nFor both macros and functions, you can take in variable arguments by simply providing a symbol instead of an argument list.\n```lisp\n(defun print-wrapper args\n  (print (len args) \"arguments supplied.\")\n  (apply print args))\n```\n\n### Scope / Variable Manipulation\n#### (let ((var-a val-a) (var-b val-b) ...) expr-a expr-b ...)\n`let` creates a new scope, binds identifiers to values in that scope (in order), and evaluates expressions. `plet` binds all of the variables in parallel.\n\n#### (set symbol value)\nSet sets the value of the symbol, obeying lexical scope. If no binding exists in the scope stack, then set automatically creates it in the closes scope.\n\n### Control Flow\n#### (if cond true-expr false-expr)\nThe `false-expr` is optional.\n\n#### (while cond stmt-a stmnt-b ...)\nA basic while loop.\n\n#### (case var (value-a stmnts...) (value-b stmnts...))\nThe case statement itself is implemented as a macro on top of the `if` builtin.\n\n### Other Builtins\n- Arithmatic Operators (`+`, `-`, `/`, `*`)\n- Comparison Operators (`=`, `\u003c`, `\u003e`, `\u003c=`, `\u003e=`)\n- Boolean Operators (`OR`, `AND`, `NOT`)\n- List Manipulation Functions (`LIST`, `LEN`, `HEAD`, `TAIL`, `NTH`, `CONS`)\n- String Manipulation Functions (`STRLEN`, `STRCMP`, `STRCAT`, `SUBSTR`)\n- `TYPEOF` function\n- `PROGN` macro\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Frameshvarun%2Fdumblisp","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Frameshvarun%2Fdumblisp","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Frameshvarun%2Fdumblisp/lists"}