mezzanine/es/data-types/tuple.js

Fantasy land union types with pattern matching

import Type from '../type';

var Tuple = (...types) => Type`Tuple${types.length}`(types, {
  length: () => types.length,
  [Symbol.iterator](ctx) {
    return function* () {
      var length = ctx.length;
      for (var i = 0; i < length; i++) {
        yield ctx[i];}
    };
  } }).
contramap((...types) => types);

export default Tuple;
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