v2.2.1

• Experimental

  • pattern matching #121

  // this example uses ES6 syntax
  
  const A = t.struct({...});
  
  const result = t.match(1,
    t.String, (s) => 'a string',
    t.Number, (n) => n > 2, (n) => 'a number gt 2', // case with a guard (optional)
    t.Number, (n) => 'a number lte 2',
    A, (a) => 'an instance of A',
    t.Any, (x) => 'other...' // catch all
  );
  
  console.log(result); // => 'a number lte 2'