float composite ​

Signature ​

function float(): Parser<number>

Description ​

Note: It doesn't handle floats with exponent parts.

float parses a float number with an optional minus sign, e.g. 0.25, -7.90, 4.20. Returns a decimal number obtained using parseFloat.

Usage ​

const Parser = float()

run(Parser).with('-42.0')

{
  isOk: true,
  span: [ 0, 5 ],
  pos: 5,
  value: -42
}

run(Parser).with('42')

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