@satachito/slip

SliP is a programmable symbolic calculator: a small expression language where 2πr, cosπ, and quoted programs share bindings within one run.

• Try it: https://slip.828.tokyo
• Language reference: https://slip.828.tokyo/SPEC.html

This package is the WASM build of the canonical C++ engine.

2.0 is not 1.x. Versions 1.x of this package were a separate JavaScript engine. The language changed — operator precedence among them — so 1.x programs are not guaranteed to mean the same thing. See the changelog.

Node

import { evaluate, run, version, reset } from '@satachito/slip'

version()                         // '2.0.0'
evaluate( '( 2 + 2 )' )           // '4'
evaluate( '( 2 π )' )             // '6.28318530717959'
evaluate( "( 1 , 2 , [ 3 ] )" )   // '[ 1 2 3 ]'

run( "( 'r = 2 )\n( 2 π r )" )
// [ { source: "( ' r = 2 )", response: '2' },
//   { source: '( 2 π r )',   response: '12.5663706143592' } ]

evaluate throws on error. run returns one entry per toplevel form and stops at the first failure, whose entry carries error instead of response. reset() discards all bindings.

Browser

The default export is the Emscripten ES module; import it and call INIT() before REP / REPL.

import createSliP from '@satachito/slip'
const slip = await createSliP()
slip.INIT()
JSON.parse( slip.REP( '( 2 + 2 )' ) )   // { source: '( 2 + 2 )', response: '4' }

Limits

• Graphics need a browser. The canvas, fill, stroke, path2D and gl:* operators reach a real DOM and do not work under Node.
• ∥ is sequential here. Parallel evaluation needs threads, which need SharedArrayBuffer and COOP/COEP headers. The value is identical either way; only elapsed time differs. The native CLI does use threads.

License

MIT