parser-lib

#Parser Lib

Goal of this library is to create enable easy and type safe creation of
parsers runable in all javascript environments.
It is inspired by haskell parsec library.


##Examples

###Parsing simple integer

``typescript
const num = integer
.parseText('11')
.map(state => state.result)
.getOrElse(0);

console.log(num); // 11
`

###Simple mathematical interpreter

`typescript
let lvl3: Parser;

const atom: Parser = or(
number,
lazy(() =>
between(
keyword('(', false),
keyword(')', false),
lvl3
)
)
);

const lvl1: Parser = chainRight(
atom,
operator('^', Math.pow)
);

const lvl2Op = or(
operator('', (a: number, b: number) => a b),
operator('/', (a: number, b: number) => a / b)
);

const lvl2: Parser = chainLeft(lvl1, lvl2Op);

const lvl3Op = or(
operator('+', (a: number, b: number) => a + b),
operator('-', (a: number, b: number) => a - b)
);

lvl3 = chainLeft(lvl2, lvl3Op);
``

For more example look in test/ directory. Test cases should be simple enough to read.