eol

eol only succeeds at the end of the line with a matched line break character.

Usage

const Parser = sequence(
  sequence(string('<start>'), eol()),
  sequence(string('<body>'), eol()),
  sequence(string('<end>'), eol())
)

Success

run(Parser).with(`<start>\n<body>\n<end>\n`)

{
  isOk: true,
  start: 0,
  end: 21,
  pos: 21,
  value: [
    [ '<start>', '\n' ],
    [ '<body>', '\n' ],
    [ '<end>', '\n' ]
  ]
}

Failure

run(Parser).with(`<start>\n<body><end>\n`)

{
  isOk: false,
  start: 14,
  end: 15,
  pos: 14,
  expected: 'end of line'
}