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takeMid composite

Signature

ts

function takeMid<T1, T2, T3>(
  p1: Parser<T1>,
  p2: Parser<T2>,
  p3: Parser<T3>
): Parser<T2>

Description

takeMid combinator takes exactly three parsers and applies them in order. Returns the result of the p2 parser in the middle.

Usage

ts

const Parser = takeMid(
  sequence(string('fn'), whitespace()),
  letters(),
  rest()
)

Success

ts

run(Parser).with('fn multiply x y')

{
  isOk: true,
  span: [ 0, 15 ],
  pos: 15,
  value: 'multiply'
}

Failure

ts

run(Parser).with('fn 100 x y')

{
  isOk: false,
  span: [ 3, 3 ],
  pos: 3,
  expected: 'letters'
}