live-parser

live-parser is a JavaScript parser combinator library designed for streaming data inputs. It is based on packrat parsing which ensure parsing with linear time complexity.

• Incremental parsing without waiting for full input.
• Build complex parsers from simple composable primitives.
• Fully type safe

Install

npm install live-parser

Quick Start

import * as lp from 'live-parser';

const join = (sep: string) => (values: string[]) => values.join(sep);

const zero = lp.literal("0");
const nonZeroDigit = lp.charFrom("1-9");
const digit = lp.oneOf(zero, nonZeroDigit);

const positiveInteger = lp.sequenceOf(
    nonZeroDigit,
    lp.zeroOrMany(digit).map(join(""))
).map(join(""))
const negativeInteger = lp.sequenceOf(
    lp.literal("-"),
    positiveInteger
).map(join(""));

const integer = lp.oneOf(
    zero,
    positiveInteger,
    negativeInteger
).map(Number)

// Parse a string
const result = integer.parseString("-123");
console.log(result);
// {
//     status: "success",
//     offset: 4,
//     value: -123
//     error: null
// }

License

MIT