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https://codeberg.org/uzu/strudel
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Felix Roosmondo
a lisp-based language intended to be used as a custom dsl for patterns that can stand on its own feet.
see the test folder for usage examples
more info:
Example Usage
import { MondoRunner } from 'mondolang'
// define our library of functions and variables
let lib = {
add: (a, b) => a + b,
mul: (a, b) => a * b,
PI: Math.PI,
};
// this function will evaluate nodes in the syntax tree
function evaluator(node) {
// check if node is a leaf node (!= list)
if (node.type !== 'list') {
// check lib if we find a match in the lib, otherwise return value
return lib[node.value] ?? node.value;
}
// now it can only be a list..
const [fn, ...args] = node.children;
// children in a list will already be evaluated
// the first child is expected to be a function
if (typeof fn !== 'function') {
throw new Error(`"${fn}" is not a function`);
}
return fn(...args);
}
const runner = new MondoRunner({ evaluator });
const pat = runner.run('add 1 (mul 2 PI)') // 7.283185307179586