whole composite ​

Signature ​

function whole(): Parser<number>

Description ​

whole parses a positive whole number without leading zeros, e.g. 0, 7, 420. Returns a decimal number obtained using parseInt with radix of 10.

Usage ​

const Parser = whole()

run(Parser).with('42')

{
  isOk: true,
  span: [ 0, 2 ],
  pos: 2,
  value: 42
}

run(Parser).with('x')

{
  isOk: false,
  span: [ 0, 0 ],
  pos: 0,
  expected: 'whole number'
}