any

any parses any single character from the input and returns it. A character here is a whole code point, so a surrogate pair comes back intact. It fails at the end of input with any @ reached the end of input.

Usage

const ManyParser = many(any())
const SingleParser = any()

Success

run(ManyParser).with('xyz')

{
  isOk: true,
  start: 0,
  end: 3,
  pos: 3,
  value: [ 'x', 'y', 'z' ]
}

Failure

run(SingleParser).with('')

{
  isOk: false,
  start: 0,
  end: 0,
  pos: 0,
  expected: 'any @ reached the end of input'
}