Rip

data= fetchUsers!# Dammit operator (call + await)user=User.newname:"Alice"# Ruby-style constructorsquares= (x* xfor xin [1..10])# List comprehensionstr=~/Hello, (\w+)/# Regex matchlog"Found:#{_[1]}"# Captures in _[1], _[2], etc.get'/users/:id'-># RESTful API endpoint, comma-lessname=read'name','string!'# Required stringage=read'age' , [0,105]# Simple numeric validation

Installation

bun add -g rip-lang# Install globally

rip# Interactive REPLrip file.rip# Run a filerip -c file.rip# Compile to JavaScript

Language

Functions & Classes

defgreet(name)# Named function"Hello,#{name}!"add= (a,b)-> a+ b# Arrow functionhandler= (e)=>@process e# Fat arrow (preserves this)classDogextendsAnimalspeak:->log"#{@name} barks"dog=Dog.new("Buddy")# Ruby-style constructor

String Interpolation

"Hello,#{name}!"# CoffeeScript-style"Hello, ${name}!"# JavaScript-style"#{a} +#{b} =#{a+ b}"# Expressions work in both

Destructuring & Comprehensions

{name,age}= person[first,...rest]= itemssquares= (x* xfor xin [1..10])# Array comprehensionconsole.log xfor xin items# Loop (no array)

Async & Chaining

defloadUser(id)response=awaitfetch"/api/#{id}"awaitresponse.json()user?.profile?.name# Optional chainingdata= fetchData!# Await shorthand

Iteration

for itemin [1,2,3]# Array iteration (for-in)console.log itemfor key, valueof object# Object iteration (for-of)console.log"#{key}:#{value}"forxas iterable# ES6 for-of on any iterableconsole.log xforxas! asyncIterable# Async iteration shorthandconsole.log x# Equivalent to: for await x as asyncIterableloop# Infinite loop (while true)process!loop5# Repeat N timesconsole.log"hi"

Implicitit

users.filter->it.active# → users.filter(function(it) { ... })names=users.map->it.name# no need to name a throwaway variableorders.filter->it.total>100# works with any expression

Reactivity

Types (Optional)

defgreet(name::string)::string# Typed function"Hello,#{name}!"User::= type# Structural typeid: numbername: stringenum HttpCode# Runtime enumok=200notFound=404

Operators

Heredoc & Heregex

html='''    <div>      <p>Hello</p>    </div>'''# Closing ''' at column 4 (same as content) — no leading whitespace# Result: "<div>\n  <p>Hello</p>\n</div>"html='''    <div>      <p>Hello</p>    </div>'''# Closing ''' at column 2 — 2 spaces of leading whitespace preserved# Result: "  <div>\n    <p>Hello</p>\n  </div>"

script='''\  echo "hello\nworld"  sed 's/\t/  /g' file.txt\'''#\n and\t stay as literal characters, not newline/tab

pattern=///^(\d{3})# area code  -(\d{4})# number///

vs React / Vue / Solid

Rip UI

<scripttype="module"src="rip-ui.min.js"></script><scripttype="text/rip"data-name="index">exportHome=component  @count :=0renderdiv.counterh1"Count: #{@count}"button @click:(-> @count++), "+"button @click:(-> @count--), "-"</script>

vs CoffeeScript

Browser

<scripttype="module"src="rip-ui.min.js"></script><scripttype="text/rip">res=fetch!'https://api.example.com/data'data=res.json!console.logdata</script>

rip("42 * 10 + 8")// → 428rip("(x * x for x in [1..5])")// → [1, 4, 9, 16, 25]awaitrip("res = fetch! 'https://api.example.com/todos/1'; res.json!")// → {id: 1, ...}

Architecture

Source  ->  Lexer  ->  emitTypes  ->  Parser  ->  S-Expressions  ->  Codegen  ->  JavaScript           (1,761)    (types.js)     (359)       ["=", "x", 42]     (3,293)      + source map

The Rip Stack

bun add -g @rip-lang/db# Installs everything (rip-lang + api + db)

Implicit Commas

# Clean route handlers (no comma needed!)get'/users'->User.all!get'/users/:id'->User.findparams.idpost'/users'->User.create body# Works with all literal typeshandle404-> {error:'Not found' }match/^\/api/-> {version:'v1' }checktrue->enable()

Quick Reference

rip# REPLrip file.rip# Runrip -c file.rip# Compilerip -t file.rip# Tokensrip -s file.rip# S-expressionsbun runtest# 1243 testsbun run parser# Rebuild parserbun run browser# Build browser bundle

Documentation

Zero Dependencies

{"dependencies": {} }

Philosophy