livecodingspace-app/public/lib/fun/partial.lenses.js

(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('infestines')) :
  typeof define === 'function' && define.amd ? define(['exports', 'infestines'], factory) :
  (factory((global.L = {}),global.I));
}(this, (function (exports,I) { 'use strict';

  var LENGTH = 'length';

  var addU = function addU(x, y) {
    return x + y;
  };
  var multiplyU = function multiplyU(x, y) {
    return x * y;
  };

  var add = /*#__PURE__*/I.curry(addU);
  var multiply = /*#__PURE__*/I.curry(multiplyU);

  var divideBy = /*#__PURE__*/I.curry(function (d, n) {
    return n / d;
  });

  var negate = function negate(x) {
    return -x;
  };

  var ltU = function ltU(x, y) {
    return x < y;
  };
  var gtU = function gtU(x, y) {
    return x > y;
  };

  var isInstanceOf = /*#__PURE__*/I.curry(I.isInstanceOfU);

  var protoless = function protoless(o) {
    return I.assign(I.create(null), o);
  };
  var protoless0 = /*#__PURE__*/I.freeze( /*#__PURE__*/protoless(I.object0));

  var replace = /*#__PURE__*/I.curry(function (p, r, s) {
    return s.replace(p, r);
  });

  function isPrimitiveData(x) {
    switch (typeof x) {
      case 'boolean':
      case 'number':
      case 'string':
        return true;
      default:
        return false;
    }
  }

  var iterator = Symbol.iterator;

  var dep = function dep(xs2xsyC) {
    return function (xsy) {
      return I.arityN(xsy[LENGTH], I.defineNameU(function () {
        return xs2xsyC.apply(undefined, arguments)(xsy).apply(undefined, arguments);
      }, xsy.name));
    };
  };

  var fn = function fn(xsC, yC) {
    return function (xsy) {
      return I.arityN(xsy[LENGTH], I.defineNameU(function () {
        for (var _len = arguments.length, xs = Array(_len), _key = 0; _key < _len; _key++) {
          xs[_key] = arguments[_key];
        }

        return yC(xsy.apply(null, xsC(xs)));
      }, xsy.name));
    };
  };

  var res = function res(yC) {
    return fn(I.id, yC);
  };

  var args = function args(xsC) {
    return fn(xsC, I.id);
  };

  var nth = function nth(i, xC) {
    return function (xs) {
      var ys = xs.slice(0);
      ys[i] = xC(ys[i]);
      return ys;
    };
  };

  var par = function par(i, xC) {
    return args(nth(i, xC));
  };

  var and = function and() {
    for (var _len2 = arguments.length, xCs = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
      xCs[_key2] = arguments[_key2];
    }

    return function (x) {
      for (var i = 0, n = xCs[LENGTH]; i < n; ++i) {
        x = xCs[i](x);
      }return x;
    };
  };

  var or = function or() {
    for (var _len3 = arguments.length, xCs = Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {
      xCs[_key3] = arguments[_key3];
    }

    return function (x) {
      var es = null;
      for (var i = 0, n = xCs[LENGTH]; i < n; ++i) {
        try {
          return xCs[i](x);
        } catch (e) {
          es = e;
        }
      }
      throw es;
    };
  };

  var ef = function ef(xE) {
    return I.defineNameU(function (x) {
      xE(x);
      return x;
    }, xE.name);
  };

  var tup = function tup() {
    for (var _len4 = arguments.length, xCs = Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {
      xCs[_key4] = arguments[_key4];
    }

    return function (xs) {
      if (xs[LENGTH] !== xCs[LENGTH]) throw Error('Expected array of ' + xCs[LENGTH] + ' elements, but got ' + xs[LENGTH]);
      return and.apply(null, xCs.map(function (xC, i) {
        return nth(i, xC);
      }))(xs);
    };
  };

  var arr = function arr(xC) {
    return function (xs) {
      return xs.map(xC);
    };
  };

  //

  var id = function id(x) {
    return x;
  };

  var setName = I.defineNameU;

  var copyName = function (to, from) {
    return I.defineNameU(to, from.name);
  };

  var toRegExpU = function toRegExpU(str, flags) {
    return I.isString(str) ? new RegExp(replace(/[|\\{}()[\]^$+*?.]/g, '\\$&', str), flags) : str;
  };

  //

  var isPair = function isPair(x) {
    return I.isArray(x) && x[LENGTH] === 2;
  };

  //

  var inserterOp = /*#__PURE__*/I.curry(function (inserter, value) {
    return [inserter, setOp(value)];
  });

  //

  var toGetter = function toGetter(getter) {
    if (typeof getter === 'function' && getter[LENGTH] < 4) return getter;
    getter = toFunction(getter);
    return function (x, i) {
      return getter(x, i, Select, id);
    };
  };

  //

  var tryCatch = function tryCatch(fn$$1) {
    return copyName(function (x) {
      try {
        return fn$$1(x);
      } catch (e) {
        return e;
      }
    }, fn$$1);
  };

  //

  var toStringPartial = function toStringPartial(x) {
    return void 0 !== x ? String(x) : '';
  };

  var sliceIndex = function sliceIndex(m, l, d, i) {
    return void 0 !== i ? Math.min(Math.max(m, i < 0 ? l + i : i), l) : d;
  };

  var cpair = function cpair(xs) {
    return function (x) {
      return [x, xs];
    };
  };

  var pairPartial = function pairPartial(k) {
    return function (v) {
      return void 0 !== k && void 0 !== v ? [k, v] : void 0;
    };
  };

  var unto = function unto(c) {
    return function (x) {
      return void 0 !== x ? x : c;
    };
  };
  var unto0 = /*#__PURE__*/unto(0);

  var toTrue = /*#__PURE__*/I.always(true);

  var notPartial = function complement(x) {
    return void 0 !== x ? !x : x;
  };

  var expect = function expect(p, f) {
    return copyName(function (x) {
      return p(x) ? f(x) : void 0;
    }, f);
  };

  var freezeInDev = I.freeze;

  var freezeResultInDev = res(I.freeze);

  var deepFreezeInDev = function deepFreezeInDev(x) {
    if (I.isArray(x)) {
      x.forEach(deepFreezeInDev);
      I.freeze(x);
    } else if (I.isObject(x)) {
      for (var k in x) {
        deepFreezeInDev(x[k]);
      }I.freeze(x);
    }
    return x;
  };

  function freezeObjectOfObjects(xs) {
    if (xs) for (var k in xs) {
      I.freeze(xs[k]);
    }return I.freeze(xs);
  }

  var isArrayOrPrimitive = function isArrayOrPrimitive(x) {
    return !(x instanceof Object) || I.isArray(x);
  };

  var rev = /*#__PURE__*/(res(I.freeze))(function reverse(xs) {
    if (seemsArrayLike(xs)) {
      var n = xs[LENGTH];
      var ys = Array(n);
      var i = 0;
      while (n) {
        ys[i++] = xs[--n];
      }return ys;
    }
  });

  //

  var mapPartialIndexU = /*#__PURE__*/(function (fn$$1) {
    return function (xi2y, xs, skip) {
      var ys = fn$$1(xi2y, xs, skip);
      if (xs !== ys) I.freeze(ys);
      return ys;
    };
  })(function (xi2y, xs, skip) {
    var n = xs[LENGTH];
    var ys = Array(n);
    var j = 0;
    var same = true;
    for (var i = 0; i < n; ++i) {
      var x = xs[i];
      var y = xi2y(x, i);
      if (skip !== y) {
        ys[j++] = y;
        if (same) same = x === y && (x !== 0 || 1 / x === 1 / y) || x !== x && y !== y;
      }
    }
    if (j !== n) {
      ys[LENGTH] = j;
      return ys;
    } else if (same) {
      return xs;
    } else {
      return ys;
    }
  });

  var mapIfArrayLike = function mapIfArrayLike(xi2y, xs) {
    return seemsArrayLike(xs) ? mapPartialIndexU(xi2y, xs, void 0) : void 0;
  };

  var mapsIfArray = /*#__PURE__*/(res(I.freeze))(function (x2y, xs) {
    if (I.isArray(xs)) {
      var n = xs[LENGTH];
      var ys = Array();
      for (var i = 0; i < n; ++i) {
        if (void 0 === (ys[i] = x2y(xs[i]))) {
          return void 0;
        }
      }
      return ys;
    }
  });

  var copyToFrom = /*#__PURE__*/(function (fn$$1) {
    return function (ys, k, xs, i, j) {
      return ys[LENGTH] === k + j - i ? I.freeze(fn$$1(ys, k, xs, i, j)) : fn$$1(ys, k, xs, i, j);
    };
  })(function (ys, k, xs, i, j) {
    while (i < j) {
      ys[k++] = xs[i++];
    }return ys;
  });

  //

  function selectInArrayLike(xi2v, xs) {
    for (var i = 0, n = xs[LENGTH]; i < n; ++i) {
      var v = xi2v(xs[i], i);
      if (void 0 !== v) return v;
    }
  }

  //

  var ConstantWith = function ConstantWith(ap, empty) {
    return I.Applicative(I.sndU, I.always(empty), ap);
  };

  var ConstantOf = function ConstantOf(_ref) {
    var concat = _ref.concat,
        empty = _ref.empty;
    return ConstantWith(concat, empty());
  };

  var Sum = /*#__PURE__*/ConstantWith(addU, 0);

  var mumBy = function mumBy(ord) {
    return I.curry(function mumBy(xi2y, t, s) {
      xi2y = toGetter(xi2y);
      var minX = void 0;
      var minY = void 0;
      getAsU(function (x, i) {
        var y = xi2y(x, i);
        if (void 0 !== y && (void 0 === minY || ord(y, minY))) {
          minX = x;
          minY = y;
        }
      }, t, s);
      return minX;
    });
  };

  //

  var traverseU = function traverse(C, xi2yC, t, s) {
    return toFunction(t)(s, void 0, C, xi2yC);
  };

  //

  var expectedOptic = 'Expecting an optic';
  var opticIsEither = 'An optic can be either\n- a string,\n- a non-negative integer,\n- a quaternary optic function,\n- an ordinary unary or binary function, or\n- an array of optics.\nSee documentation of `toFunction` and `compose` for details.';
  var header = 'partial.lenses: ';

  function warn(f, m) {
    if (!f.warned) {
      f.warned = 1;
      console.warn(header + m);
    }
  }

  function errorGiven(m, o, e) {
    m = header + m + '.';
    e = e ? '\n' + e : '';
    console.error(m, 'Given:', o, e);
    throw Error(m + e);
  }

  var reqIndex = function index(x) {
    if (!Number.isInteger(x) || x < 0) errorGiven('`index` expects a non-negative integer', x);
  };

  function reqFunction(o) {
    if (!(I.isFunction(o) && (o[LENGTH] === 4 || o[LENGTH] <= 2))) errorGiven(expectedOptic, o, opticIsEither);
  }

  function reqFn(x) {
    if (!I.isFunction(x)) errorGiven('Expected a function', x);
  }

  function reqArray(o) {
    if (!I.isArray(o)) errorGiven(expectedOptic, o, opticIsEither);
  }

  function reqOptic(o) {
    switch (typeof o) {
      case 'string':
        break;
      case 'number':
        reqIndex(o);
        break;
      case 'object':
        reqArray(o);
        for (var i = 0, n = o[LENGTH]; i < n; ++i) {
          reqOptic(o[i]);
        }break;
      default:
        reqFunction(o);
        break;
    }
  }

  //

  var reqString = function reqString(msg) {
    return function (x) {
      if (!I.isString(x)) errorGiven(msg, x);
    };
  };

  var reqMaybeArray = function reqMaybeArray(msg) {
    return function (zs) {
      if (!(void 0 === zs || seemsArrayLike(zs))) errorGiven(msg, zs);
    };
  };

  //

  var reqMonad = function reqMonad(name) {
    return function (C) {
      if (!C.chain) errorGiven('`' + name + '` requires a monad', C, 'Note that you can only `modify`, `remove`, `set`, and `traverse` a transform.');
    };
  };

  //

  var mkTraverse = function mkTraverse(after, toC) {
    return I.curryN(4, copyName(function (xi2yC, m) {
      return m = toC(m), function (t, s) {
        return after(traverseU(m, xi2yC, t, s));
      };
    }, toC));
  };

  //

  var consExcept = function consExcept(skip) {
    return function (t) {
      return function (h) {
        return skip !== h ? [h, t] : t;
      };
    };
  };

  var pushTo = function pushTo(n, xs) {
    while (consExcept !== n) {
      xs.push(n[0]);
      n = n[1];
    }
    return xs;
  };

  var consTo = /*#__PURE__*/(res(I.freeze))(function (n) {
    return pushTo(n, []).reverse();
  });

  function traversePartialIndex(A, xi2yA, xs, skip) {
    var map = A.map,
        ap = A.ap;

    var xsA = A.of(consExcept);
    var n = xs[LENGTH];
    if (map === I.sndU) {
      for (var i = 0; i < n; ++i) {
        xsA = ap(xsA, xi2yA(xs[i], i));
      }return xsA;
    } else {
      var cons = consExcept(skip);
      for (var _i2 = 0; _i2 < n; ++_i2) {
        xsA = ap(map(cons, xsA), xi2yA(xs[_i2], _i2));
      }return map(consTo, xsA);
    }
  }

  //

  var SelectLog = /*#__PURE__*/I.Applicative(function (f, _ref2) {
    var p = _ref2.p,
        x = _ref2.x,
        c = _ref2.c;

    x = f(x);
    if (!I.isFunction(x)) p = [x, p];
    return { p: p, x: x, c: c };
  }, function (x) {
    return { p: [], x: x, c: undefined };
  }, function (l, r) {
    var v = undefined !== l.c ? l : r;
    return { p: v.p, x: l.x(r.x), c: v.c };
  });

  //

  var lensFrom = function lensFrom(get, set) {
    return function (i) {
      return function (x, _i, F, xi2yF) {
        return F.map(function (v) {
          return set(i, v, x);
        }, xi2yF(get(i, x), i));
      };
    };
  };

  //

  var getProp = function getProp(k, o) {
    return o instanceof Object ? o[k] : void 0;
  };

  var setProp = /*#__PURE__*/(res(I.freeze))(function (k, v, o) {
    return void 0 !== v ? I.assocPartialU(k, v, o) : I.dissocPartialU(k, o) || I.object0;
  });

  var funProp = /*#__PURE__*/lensFrom(getProp, setProp);

  //

  var getIndex = function getIndex(i, xs) {
    return seemsArrayLike(xs) ? xs[i] : void 0;
  };

  var setIndex = /*#__PURE__*/(fn(nth(0, ef(reqIndex)), I.freeze))(function (i, x, xs) {
    if (!seemsArrayLike(xs)) xs = '';
    var n = xs[LENGTH];
    if (void 0 !== x) {
      var m = Math.max(i + 1, n);
      var ys = Array(m);
      for (var j = 0; j < m; ++j) {
        ys[j] = xs[j];
      }ys[i] = x;
      return ys;
    } else {
      if (n <= i) return copyToFrom(Array(n), 0, xs, 0, n);
      var _ys = Array(n - 1);
      for (var _j = 0; _j < i; ++_j) {
        _ys[_j] = xs[_j];
      }for (var _j2 = i + 1; _j2 < n; ++_j2) {
        _ys[_j2 - 1] = xs[_j2];
      }return _ys;
    }
  });

  var funIndex = /*#__PURE__*/lensFrom(getIndex, setIndex);

  //

  var composedMiddle = function composedMiddle(o, r) {
    return function (F, xi2yF) {
      return xi2yF = r(F, xi2yF), function (x, i) {
        return o(x, i, F, xi2yF);
      };
    };
  };

  function composed(oi0, os) {
    var n = os[LENGTH] - oi0;
    if (n < 2) {
      return n ? toFunction(os[oi0]) : identity;
    } else {
      var _last = toFunction(os[oi0 + --n]);
      var r = function r(F, xi2yF) {
        return function (x, i) {
          return _last(x, i, F, xi2yF);
        };
      };
      while (--n) {
        r = composedMiddle(toFunction(os[oi0 + n]), r);
      }var _first = toFunction(os[oi0]);
      return function (x, i, F, xi2yF) {
        return _first(x, i, F, r(F, xi2yF));
      };
    }
  }

  var disperseU = function disperse(traversal, values, data) {
    if (!seemsArrayLike(values)) values = '';
    var i = 0;
    return modifyU(traversal, function () {
      return values[i++];
    }, data);
  };

  var setU = /*#__PURE__*/(par(0, ef(reqOptic)))(function set(o, x, s) {
    switch (typeof o) {
      case 'string':
        return setProp(o, x, s);
      case 'number':
        return setIndex(o, x, s);
      case 'object':
        return modifyComposed(o, 0, s, x);
      default:
        return o[LENGTH] === 4 ? o(s, void 0, I.Identity, I.always(x)) : s;
    }
  });

  var getInverseU = function getInverse(o, x) {
    return setU(o, x, void 0);
  };

  var modifyU = /*#__PURE__*/(par(0, ef(reqOptic)))(function modify(o, xi2x, s) {
    switch (typeof o) {
      case 'string':
        return setProp(o, xi2x(getProp(o, s), o), s);
      case 'number':
        return setIndex(o, xi2x(getIndex(o, s), o), s);
      case 'object':
        return modifyComposed(o, xi2x, s);
      default:
        return o[LENGTH] === 4 ? o(s, void 0, I.Identity, xi2x) : (xi2x(o(s, void 0), void 0), s);
    }
  });

  var modifyAsyncU = function modifyAsyncU(o, f, s) {
    return I.resolve(toFunction(o)(s, void 0, I.IdentityAsync, f));
  };

  var getAsU = /*#__PURE__*/(par(1, ef(reqOptic)))(function getAs(xi2y, l, s) {
    switch (typeof l) {
      case 'string':
        return xi2y(getProp(l, s), l);
      case 'number':
        return xi2y(getIndex(l, s), l);
      case 'object':
        {
          var n = l[LENGTH];
          for (var i = 0, o; i < n; ++i) {
            switch (typeof (o = l[i])) {
              case 'string':
                s = getProp(o, s);
                break;
              case 'number':
                s = getIndex(o, s);
                break;
              default:
                return composed(i, l)(s, l[i - 1], Select, xi2y);
            }
          }return xi2y(s, l[n - 1]);
        }
      default:
        return xi2y !== id && l[LENGTH] !== 4 ? xi2y(l(s, void 0), void 0) : l(s, void 0, Select, xi2y);
    }
  });

  var getU = function getU(l, s) {
    return getAsU(id, l, s);
  };

  function modifyComposed(os, xi2y, x, y) {
    var n = os[LENGTH];
    var xs = Array(n);
    for (var i = 0, o; i < n; ++i) {
      xs[i] = x;
      switch (typeof (o = os[i])) {
        case 'string':
          x = getProp(o, x);
          break;
        case 'number':
          x = getIndex(o, x);
          break;
        default:
          x = composed(i, os)(x, os[i - 1], I.Identity, xi2y || I.always(y));
          n = i;
          break;
      }
    }
    if (n === os[LENGTH]) x = xi2y ? xi2y(x, os[n - 1]) : y;
    for (var _o; 0 <= --n;) {
      x = I.isString(_o = os[n]) ? setProp(_o, x, xs[n]) : setIndex(_o, x, xs[n]);
    }return x;
  }

  //

  var lensU = function lens(get, set) {
    return copyName(function (x, i, F, xi2yF) {
      return F.map(function (y) {
        return set(y, x, i);
      }, xi2yF(get(x, i), i));
    }, get);
  };

  var isoU = function iso(bwd, fwd) {
    return copyName(function (x, i, F, xi2yF) {
      return F.map(fwd, xi2yF(bwd(x), i));
    }, bwd);
  };

  var stringIsoU = function stringIsoU(bwd, fwd) {
    return isoU(expect(I.isString, bwd), expect(I.isString, fwd));
  };

  var numberIsoU = function numberIsoU(bwd, fwd) {
    return isoU(expect(I.isNumber, bwd), expect(I.isNumber, fwd));
  };

  //

  var getPick = /*#__PURE__*/(res(I.freeze))(function (template, x) {
    var r = void 0;
    for (var k in template) {
      var t = template[k];
      var v = I.isObject(t) ? getPick(t, x) : getAsU(id, t, x);
      if (void 0 !== v) {
        if (!r) r = {};
        r[k] = v;
      }
    }
    return r;
  });

  var reqTemplate = function reqTemplate(name) {
    return function (template) {
      if (!I.isObject(template)) errorGiven('`' + name + '` expects a plain Object template', template);
    };
  };

  var reqObject = function reqObject(msg) {
    return function (value) {
      if (!(void 0 === value || value instanceof Object)) errorGiven(msg, value);
    };
  };

  var setPick = /*#__PURE__*/(par(1, ef(reqObject('`pick` must be set with undefined or an object'))))(function (template, value, x) {
    for (var k in template) {
      var v = value && value[k];
      var t = template[k];
      x = I.isObject(t) ? setPick(t, v, x) : setU(t, v, x);
    }
    return x;
  });

  //

  var toObject = function toObject(x) {
    return I.constructorOf(x) !== Object ? I.toObject(x) : x;
  };

  //

  var identity = function identity(x, i, _F, xi2yF) {
    return xi2yF(x, i);
  };

  //

  var branchAssemble = /*#__PURE__*/(res(res(I.freeze)))(function (ks) {
    return function (xs) {
      var r = {};
      var i = ks[LENGTH];
      while (i--) {
        var v = xs[0];
        if (void 0 !== v) {
          r[ks[i]] = v;
        }
        xs = xs[1];
      }
      return r;
    };
  });

  var branchOr1LevelIdentity = /*#__PURE__*/(function (fn$$1) {
    return function (otherwise, k2o, xO, x, A, xi2yA) {
      var y = fn$$1(otherwise, k2o, xO, x, A, xi2yA);
      if (x !== y) I.freeze(y);
      return y;
    };
  })(function (otherwise, k2o, xO, x, A, xi2yA) {
    var written = void 0;
    var same = true;
    var r = {};
    for (var k in k2o) {
      written = 1;
      var _x2 = xO[k];
      var y = k2o[k](_x2, k, A, xi2yA);
      if (void 0 !== y) {
        r[k] = y;
        if (same) same = _x2 === y && (_x2 !== 0 || 1 / _x2 === 1 / y) || _x2 !== _x2 && y !== y;
      } else {
        same = false;
      }
    }
    var t = written;
    for (var _k in xO) {
      if (void 0 === (t && k2o[_k])) {
        written = 1;
        var _x3 = xO[_k];
        var _y = otherwise(_x3, _k, A, xi2yA);
        if (void 0 !== _y) {
          r[_k] = _y;
          if (same) same = _x3 === _y && (_x3 !== 0 || 1 / _x3 === 1 / _y) || _x3 !== _x3 && _y !== _y;
        } else {
          same = false;
        }
      }
    }
    return written ? same && xO === x ? x : r : x;
  });

  var branchOr1Level = function branchOr1Level(otherwise, k2o) {
    return function (x, _i, A, xi2yA) {
      var xO = x instanceof Object ? toObject(x) : I.object0;

      if (I.Identity === A) {
        return branchOr1LevelIdentity(otherwise, k2o, xO, x, A, xi2yA);
      } else if (Select === A) {
        for (var k in k2o) {
          var y = k2o[k](xO[k], k, A, xi2yA);
          if (void 0 !== y) return y;
        }
        for (var _k2 in xO) {
          if (void 0 === k2o[_k2]) {
            var _y2 = otherwise(xO[_k2], _k2, A, xi2yA);
            if (void 0 !== _y2) return _y2;
          }
        }
      } else {
        var map = A.map,
            ap = A.ap,
            of = A.of;

        var xsA = of(cpair);
        var ks = [];
        for (var _k3 in k2o) {
          ks.push(_k3);
          xsA = ap(map(cpair, xsA), k2o[_k3](xO[_k3], _k3, A, xi2yA));
        }
        var t = ks[LENGTH] ? true : void 0;
        for (var _k4 in xO) {
          if (void 0 === (t && k2o[_k4])) {
            ks.push(_k4);
            xsA = ap(map(cpair, xsA), otherwise(xO[_k4], _k4, A, xi2yA));
          }
        }
        return ks[LENGTH] ? map(branchAssemble(ks), xsA) : of(x);
      }
    };
  };

  function branchOrU(otherwise, template) {
    var k2o = I.create(null);
    for (var k in template) {
      var v = template[k];
      k2o[k] = I.isObject(v) ? branchOrU(otherwise, v) : toFunction(v);
    }
    return branchOr1Level(otherwise, k2o);
  }

  var replaced = function replaced(inn, out, x) {
    return I.acyclicEqualsU(x, inn) ? out : x;
  };

  function findIndexHint(hint, xi2b, xs) {
    var u = hint.hint;
    var n = xs[LENGTH];
    if (n <= u) u = n - 1;
    if (u < 0) u = 0;
    var d = u - 1;
    for (; 0 <= d && u < n; ++u, --d) {
      if (xi2b(xs[u], u, hint)) return u;
      if (xi2b(xs[d], d, hint)) return d;
    }
    for (; u < n; ++u) {
      if (xi2b(xs[u], u, hint)) return u;
    }for (; 0 <= d; --d) {
      if (xi2b(xs[d], d, hint)) return d;
    }return n;
  }

  var partitionIntoIndex = /*#__PURE__*/(dep(function (_xi2b, _xs, ts, fs) {
    return res(ef(function () {
      I.freeze(ts);
      I.freeze(fs);
    }));
  }))(function (xi2b, xs, ts, fs) {
    for (var i = 0, n = xs[LENGTH], x; i < n; ++i) {
      (xi2b(x = xs[i], i) ? ts : fs).push(x);
    }
  });

  var fromReader = function fromReader(wi2x) {
    return copyName(function (w, i, F, xi2yF) {
      return F.map(I.always(w), xi2yF(wi2x(w, i), i));
    }, wi2x);
  };

  //

  var LAST_INDEX = 'lastIndex';
  var INDEX = 'index';
  var RE_VALUE = 0;

  var reLastIndex = function reLastIndex(m) {
    return m[INDEX] + m[0][LENGTH];
  };

  var reNext = /*#__PURE__*/(function (fn$$1) {
    return function (m, re) {
      var res$$1 = fn$$1(m, re);
      if ('' === res$$1) warn(reNext, '`matches(' + re + ')` traversal terminated due to empty match.  `matches` traversal shouldn\'t be used with regular expressions that can produce empty matches.');
      return res$$1;
    };
  })(function (m, re) {
    var lastIndex = re[LAST_INDEX];
    re[LAST_INDEX] = reLastIndex(m);
    var n = re.exec(m.input);
    re[LAST_INDEX] = lastIndex;
    return n && n[0] && n;
  });

  //

  var iterCollect = function iterCollect(s) {
    return function (xs) {
      return function (x) {
        return [s, x, xs];
      };
    };
  };

  var iterToArray = function iterToArray(xs) {
    var ys = [];
    while (iterCollect !== xs) {
      ys.push(xs[0], xs[1]);
      xs = xs[2];
    }
    return ys;
  };

  function iterSelect(xi2y, t, s) {
    while (s = reNext(s, t)) {
      var y = xi2y(s[RE_VALUE], s[INDEX]);
      if (void 0 !== y) return y;
    }
  }

  function iterEager(map, ap, of, xi2yA, t, s) {
    var r = of(iterCollect);
    while (s = reNext(s, t)) {
      r = ap(ap(map(iterCollect, of(s)), r), xi2yA(s[RE_VALUE], s[INDEX]));
    }return r;
  }

  //

  var keyed = /*#__PURE__*/isoU( /*#__PURE__*/expect( /*#__PURE__*/isInstanceOf(Object), /*#__PURE__*/(res(freezeObjectOfObjects))(function keyed(x) {
    x = toObject(x);
    var es = [];
    for (var key in x) {
      es.push([key, x[key]]);
    }return es;
  })), /*#__PURE__*/expect(I.isArray, /*#__PURE__*/(res(I.freeze))(function (es) {
    var o = {};
    for (var i = 0, n = es[LENGTH]; i < n; ++i) {
      var entry = es[i];
      if (entry[LENGTH] === 2) o[entry[0]] = entry[1];
    }
    return o;
  })));

  //

  var matchesJoin = function matchesJoin(input) {
    return function (matchesIn) {
      var result = '';
      var lastIndex = 0;
      var matches = iterToArray(matchesIn);
      var n = matches[LENGTH];
      for (var j = n - 2; j !== -2; j += -2) {
        var m = matches[j];
        result += input.slice(lastIndex, m[INDEX]);
        var s = matches[j + 1];
        if (void 0 !== s) result += s;
        lastIndex = reLastIndex(m);
      }

      result += input.slice(lastIndex);
      return result;
    };
  };

  //

  var disjointBwd = /*#__PURE__*/(res(freezeObjectOfObjects))(function (groupOf, x) {
    if (x instanceof Object) {
      var y = {};
      x = toObject(x);
      for (var key in x) {
        var group = groupOf(key);
        var g = y[group];
        if (undefined === g) y[group] = g = {};
        g[key] = x[key];
      }
      return y;
    }
  });

  var disjointFwd = /*#__PURE__*/(res(res(I.freeze)))(function (groupOf) {
    return function (y) {
      if (y instanceof Object) {
        var x = {};
        y = toObject(y);
        for (var group in y) {
          var g = y[group];
          if (g instanceof Object) {
            g = toObject(g);
            for (var key in g) {
              if (groupOf(key) === group) {
                x[key] = g[key];
              }
            }
          }
        }
        return x;
      }
    };
  });

  //

  var subseqU = function subseq(begin, end, t) {
    t = toFunction(t);
    return copyName(function (x, i, F, xi2yF) {
      var n = -1;
      return t(x, i, F, function (x, i) {
        return begin <= ++n && !(end <= n) ? xi2yF(x, i) : F.of(x);
      });
    }, t);
  };

  //

  var attemptU = function attemptU(fn$$1, x) {
    if (void 0 !== x) {
      var y = fn$$1(x);
      if (void 0 !== y) return y;
    }
    return x;
  };

  var rewriteAttempt = function rewriteAttempt(fn$$1) {
    return function (x, i, F, xi2yF) {
      return F.map(function (x) {
        return attemptU(fn$$1, x);
      }, xi2yF(x, i));
    };
  };

  var rereadAttempt = function rereadAttempt(fn$$1) {
    return function (x, i, F, xi2yF) {
      return xi2yF(attemptU(fn$$1, x), i);
    };
  };

  //

  var transformEvery = function transformEvery(optic) {
    return transform(lazy(function (rec) {
      return [optic, children, rec];
    }));
  };

  var transformSome = function transformSome(fn$$1) {
    return transform(lazy(function (rec) {
      return choices(getter(fn$$1), [children, rec]);
    }));
  };

  //

  var isDefinedAtU = function isDefinedAtU(o, x, i) {
    return void 0 !== o(x, i, Select, id);
  };

  var isDefinedAt = function isDefinedAt(o) {
    return function (x, i) {
      return isDefinedAtU(o, x, i);
    };
  };

  var eitherU = function eitherU(t, e) {
    return function either(c) {
      return function either(x, i, C, xi2yC) {
        return (c(x, i) ? t : e)(x, i, C, xi2yC);
      };
    };
  };

  var orElseU = function orElse(back, prim) {
    prim = toFunction(prim);
    back = toFunction(back);
    return function orElse(x, i, C, xi2yC) {
      return (isDefinedAtU(prim, x, i) ? prim : back)(x, i, C, xi2yC);
    };
  };

  var orAlternativelyU = function orAlternatively(back, prim) {
    prim = toFunction(prim);
    back = toFunction(back);
    var fwd = function fwd(y) {
      y = I.always(y);
      var yP = prim(void 0, void 0, I.Identity, y);
      return void 0 === yP ? back(void 0, void 0, I.Identity, y) : yP;
    };
    return function orAlternatively(x, i, F, xi2yF) {
      var xP = prim(x, i, Select, id);
      return F.map(fwd, xi2yF(void 0 === xP ? back(x, i, Select, id) : xP, i));
    };
  };

  var makeSemi = function makeSemi(op) {
    return copyName(function (_) {
      var n = arguments[LENGTH];
      var r = arguments[--n];
      while (n) {
        r = op(r, arguments[--n]);
      }
      return r;
    }, op);
  };

  var zero = function zero(x, _i, C, _xi2yC) {
    return C.of(x);
  };

  //

  var elemsI = function elemsI(xs, _i, A, xi2yA) {
    return A === I.Identity ? mapPartialIndexU(xi2yA, xs, void 0) : A === Select ? selectInArrayLike(xi2yA, xs) : traversePartialIndex(A, xi2yA, xs, void 0);
  };

  //

  var seq2U = function seq2U(l, r) {
    return function (x, i, M, xi2yM) {
      return M.chain(function (x) {
        return r(x, i, M, xi2yM);
      }, l(x, i, M, xi2yM));
    };
  };

  //

  var pickInAux = function pickInAux(t, k) {
    return [k, pickIn(t)];
  };

  //

  var iteratePartial = function iteratePartial(aa) {
    return function iterate(a) {
      var r = a;
      while (a !== undefined) {
        r = a;
        a = aa(a);
      }
      return r;
    };
  };

  //

  var crossPartial = function crossPartial(op, ls, or$$1) {
    return function (xs, ss) {
      var n = ls[LENGTH];
      if (!seemsArrayLike(xs)) return;
      if (!seemsArrayLike(ss)) ss = '';
      var m = Math.max(n, xs[LENGTH], ss[LENGTH]);
      var ys = Array(m);
      for (var i = 0; i < m; ++i) {
        if (void 0 === (ys[i] = op(i < n ? ls[i] : or$$1, xs[i], ss[i]))) return;
      }return ys;
    };
  };

  var crossOr = /*#__PURE__*/(function (fn$$1) {
    return I.curry(function crossOr(or$$1, ls) {
      return toFunction([isoU(id, I.freeze), fn$$1(or$$1, ls), isoU(I.freeze, id)]);
    });
  })(function crossOr(or$$1, ls) {
    return lensU(crossPartial(getU, ls, or$$1), crossPartial(setU, ls, or$$1));
  });

  var subsetPartial = function subsetPartial(p) {
    return function subset(x) {
      return void 0 !== x && p(x) ? x : void 0;
    };
  };

  //

  var unfoldPartial = /*#__PURE__*/(res(res(function (r) {
    I.freeze(r);
    I.freeze(r[1]);
    return r;
  })))(function (s2sa) {
    return function unfold(s) {
      var xs = [];
      for (;;) {
        var sa = s2sa(s);
        if (!isPair(sa)) return [s, xs];
        s = sa[0];
        xs.push(sa[1]);
      }
    };
  });

  var foldPartial = function foldPartial(sa2s) {
    return function (sxs) {
      if (isPair(sxs)) {
        var xs = sxs[1];
        if (I.isArray(xs)) {
          var s = sxs[0];
          var n = xs[LENGTH];
          while (n--) {
            s = sa2s(freezeInDev([s, xs[n]]));
          }return s;
        }
      }
    };
  };

  //

  var PAYLOAD = '珳襱댎纚䤤鬖罺좴';

  var isPayload = function isPayload(k) {
    return I.isString(k) && k.indexOf(PAYLOAD) === 0;
  };

  function Spread(i) {
    this[PAYLOAD] = i;
    I.freeze(this);
  }

  var isSpread = /*#__PURE__*/isInstanceOf(Spread);

  var Variable = /*#__PURE__*/I.inherit(function Variable(i) {
    this[PAYLOAD + i] = this[PAYLOAD] = I.freeze([new Spread(i)]);
    I.freeze(this);
  }, Object, /*#__PURE__*/I.assocPartialU(iterator, function () {
    return this[PAYLOAD][iterator]();
  }));
  var isVariable = /*#__PURE__*/isInstanceOf(Variable);

  var vars = [];
  function nVars(n) {
    while (vars[LENGTH] < n) {
      vars.push(new Variable(vars[LENGTH]));
    }return vars;
  }

  var isPrimitive = function isPrimitive(x) {
    return x == null || typeof x !== 'object';
  };

  function match1(kinds, i, e, x) {
    if (void 0 !== x) {
      if (i in e) return I.acyclicEqualsU(e[i], x);
      e[i] = x;
      var k = kinds[i];
      return !k || k(x);
    }
  }

  function checkKind(kinds, i, kind) {
    if (0 <= i) {
      if (kinds[i]) {
        if (kinds[i] !== kind) throw Error('Spread patterns must be used consistently either as arrays or as objects.');
      } else {
        kinds[i] = kind;
      }
    }
  }

  var arrayKind = function arrayKind(x) {
    return void 0 === x || I.isArray(x);
  };
  var objectKind = function objectKind(x) {
    return void 0 === x || isInstanceOf(Object);
  };

  function checkPattern(kinds, p) {
    if (isSpread(p)) {
      throw Error('Spread patterns must be inside objects or arrays.');
    } else if (I.isArray(p)) {
      var nSpread = 0;
      for (var i = 0, n = p[LENGTH]; i < n; ++i) {
        var pi = p[i];
        if (isSpread(pi)) {
          if (nSpread++) throw Error('At most one spread is allowed in an array or object.');
          checkKind(kinds, pi[PAYLOAD], arrayKind);
        } else {
          checkPattern(kinds, pi);
        }
      }
    } else if (I.isObject(p)) {
      var spread = p[PAYLOAD];
      if (spread) {
        spread = spread[0][PAYLOAD];
        checkKind(kinds, spread, objectKind);
      }
      var _n = 0;
      for (var k in p) {
        if (isPayload(k)) {
          if (2 < ++_n) throw Error('At most one spread is allowed in an array or object.');
        } else {
          checkPattern(kinds, p[k]);
        }
      }
    } else if (!isPrimitive(p) && !isVariable(p)) {
      throw Error('Only plain arrays and objects are allowed in patterns.');
    }
  }

  var checkPatternInDev = function (p) {
    var kinds = [];
    checkPattern(kinds, p);
    return deepFreezeInDev(p);
  };

  var checkPatternPairInDev = function (ps) {
    var kinds = [];
    checkPattern(kinds, ps[0]);
    checkPattern(kinds, ps[1]);
    return deepFreezeInDev(ps);
  };

  var setDefined = function setDefined(o, k, x) {
    if (void 0 !== x) o[k] = x;
  };

  var pushDefined = function pushDefined(xs, x) {
    if (void 0 !== x) xs.push(x);
  };

  function toMatch(kinds, p) {
    if (void 0 === p || all1(isPrimitive, leafs, p)) {
      return function (e, x) {
        return I.acyclicEqualsU(p, x);
      };
    } else if (isVariable(p)) {
      var i = p[PAYLOAD][0][PAYLOAD];
      return i < 0 ? id : function (e, x) {
        return match1(kinds, i, e, x);
      };
    } else if (I.isArray(p)) {
      var init = [];
      var rest = [];
      var spread = void 0;
      var n = p[LENGTH];
      for (var _i3 = 0; _i3 < n; ++_i3) {
        var x = p[_i3];
        if (isSpread(x)) {
          spread = x[PAYLOAD];
          kinds[spread] = arrayKind;
        } else {
          var side = void 0 !== spread ? rest : init;
          side.push(toMatch(kinds, x));
        }
      }
      return function (e, x) {
        if (!seemsArrayLike(x)) return;
        var l = x[LENGTH];
        if (void 0 !== spread ? l < n - 1 : l !== n) return;
        var j = init[LENGTH];
        for (var _i4 = 0; _i4 < j; ++_i4) {
          if (!init[_i4](e, x[_i4])) return;
        }var k = rest[LENGTH];
        l -= k;
        for (var _i5 = 0; _i5 < k; ++_i5) {
          if (!rest[_i5](e, x[l + _i5])) return;
        }return !(0 <= spread) || match1(kinds, spread, e, copyToFrom(Array(l - j), 0, x, j, l));
      };
    } else {
      var _spread = p[PAYLOAD];
      if (_spread) {
        _spread = _spread[0][PAYLOAD];
        kinds[_spread] = objectKind;
      }
      p = modify(values, function (p, k) {
        return isPayload(k) ? void 0 : toMatch(kinds, p);
      }, p);
      var _n2 = count(values, p);
      return function (e, x) {
        if (isPrimitive(x) || I.isArray(x)) return;
        x = toObject(x);
        var rest = 0 <= _spread && {};
        var i = 0;
        for (var k in x) {
          var m = p[k];
          if (m) {
            if (!m(e, x[k])) return;
            i++;
          } else if (void 0 !== _spread) {
            if (rest) rest[k] = x[k];
          } else {
            return;
          }
        }
        return i === _n2 && (!rest || match1(kinds, _spread, e, freezeInDev(rest)));
      };
    }
  }

  function toSubst(p, k) {
    if (isPayload(k)) {
      return void 0;
    } else if (void 0 === p || all1(isPrimitive, leafs, p)) {
      return I.always(p);
    } else if (isVariable(p)) {
      var i = p[PAYLOAD][0][PAYLOAD];
      return function (e) {
        return e[i];
      };
    } else if (I.isArray(p)) {
      var init = [];
      var rest = [];
      var spread = void 0;
      var n = p[LENGTH];
      for (var _i6 = 0; _i6 < n; ++_i6) {
        var x = p[_i6];
        if (isSpread(x)) {
          spread = x[PAYLOAD];
        } else {
          var side = void 0 !== spread ? rest : init;
          side.push(toSubst(x));
        }
      }
      return freezeResultInDev(function (e) {
        var r = [];
        for (var _i7 = 0, _n3 = init[LENGTH]; _i7 < _n3; ++_i7) {
          pushDefined(r, init[_i7](e));
        }if (0 <= spread) {
          var xs = e[spread];
          if (xs) for (var _i8 = 0, _n4 = xs[LENGTH]; _i8 < _n4; ++_i8) {
            pushDefined(r, xs[_i8]);
          }
        }
        for (var _i9 = 0, _n5 = rest[LENGTH]; _i9 < _n5; ++_i9) {
          pushDefined(r, rest[_i9](e));
        }return r;
      });
    } else {
      var _spread2 = p[PAYLOAD];
      if (_spread2) _spread2 = _spread2[0][PAYLOAD];
      p = modify(values, toSubst, p);
      return freezeResultInDev(function (e) {
        var r = {};
        for (var _k5 in p) {
          setDefined(r, _k5, p[_k5](e));
        }if (0 <= _spread2) {
          var _x4 = e[_spread2];
          if (_x4) for (var _k6 in _x4) {
            setDefined(r, _k6, _x4[_k6]);
          }
        }
        return r;
      });
    }
  }

  var oneway = function oneway(n, m, s) {
    return function (x) {
      var e = Array(n);
      if (m(e, x)) return s(e);
    };
  };

  //

  var ungroupByFn = /*#__PURE__*/(res(res(I.freeze)))(function (keyOf) {
    return function ungroupBy(xxs) {
      if (I.isArray(xxs)) {
        var ys = [];
        for (var i = 0, n = xxs.length; i < n; ++i) {
          var xs = xxs[i];
          if (!I.isArray(xs)) return;
          var m = xs.length;
          if (!m) return;
          var k = keyOf(xs[0]);
          if (void 0 === k) return;
          for (var j = 0, _m = xs.length; j < _m; ++j) {
            var x = xs[j];
            if (!I.identicalU(k, keyOf(x))) return;
            ys.push(x);
          }
        }
        return ys;
      }
    };
  });

  var groupByFn = /*#__PURE__*/(res(res(freezeObjectOfObjects)))(function (keyOf) {
    return function groupBy(ys) {
      if (I.isArray(ys)) {
        var groups = new Map();
        for (var i = 0, n = ys.length; i < n; ++i) {
          var y = ys[i];
          var k = keyOf(y);
          if (void 0 === k) return;
          var xs = groups.get(k);
          if (void 0 !== xs) {
            xs.push(y);
          } else {
            groups.set(k, [y]);
          }
        }
        var xxs = [];
        groups.forEach(function (xs) {
          return xxs.push(xs);
        });
        return xxs;
      }
    };
  });

  //

  var zW1Fn = /*#__PURE__*/(res(res(I.freeze)))(function (fn$$1) {
    return function zipWith1(xys) {
      if (isPair(xys)) {
        var ys = xys[1];
        var n = ys[LENGTH];
        if (n) {
          var x = xys[0];
          var zs = Array(n);
          for (var i = 0; i < n; ++i) {
            if (void 0 === (zs[i] = fn$$1([x, ys[i]]))) return;
          }return zs;
        }
      }
    };
  });

  var unzW1Fn = /*#__PURE__*/(res(res(freezeObjectOfObjects)))(function (fn$$1) {
    return function unzipWith1(zs) {
      if (I.isArray(zs)) {
        var n = zs[LENGTH];
        if (n) {
          var xy0 = fn$$1(zs[0]);
          if (isPair(xy0)) {
            var ys = Array(n);
            var x = xy0[0];
            ys[0] = xy0[1];
            for (var i = 1; i < n; ++i) {
              var xy = fn$$1(zs[i]);
              if (!isPair(xy) || !I.acyclicEqualsU(x, xy[0])) return;
              ys[i] = xy[1];
            }
            return [x, ys];
          }
        }
      }
    };
  });

  // Auxiliary

  var seemsArrayLike = function seemsArrayLike(x) {
    return x instanceof Object && (x = x[LENGTH], x === x >> 0 && 0 <= x) || I.isString(x);
  };

  var Select = /*#__PURE__*/ConstantWith(function (l, r) {
    return void 0 !== l ? l : r;
  });

  var toFunction = /*#__PURE__*/(par(0, ef(reqOptic)))(function toFunction(o) {
    switch (typeof o) {
      case 'string':
        return funProp(o);
      case 'number':
        return funIndex(o);
      case 'object':
        return composed(0, o);
      default:
        return o[LENGTH] === 4 ? o : fromReader(o);
    }
  });

  // Operations on optics

  var assign = /*#__PURE__*/I.curry(function assign(o, x, s) {
    return setU([o, assignTo], x, s);
  });

  var disperse = /*#__PURE__*/I.curry(disperseU);

  var modify = /*#__PURE__*/I.curry(modifyU);

  var modifyAsync = /*#__PURE__*/I.curry(modifyAsyncU);

  var remove = /*#__PURE__*/I.curry(function remove(o, s) {
    return setU(o, void 0, s);
  });

  var set = /*#__PURE__*/I.curry(setU);

  var traverse = /*#__PURE__*/I.curry(traverseU);

  // Nesting

  function compose() {
    var n = arguments[LENGTH];
    if (n < 2) {
      return n ? arguments[0] : identity;
    } else {
      var os = Array(n);
      while (n--) {
        os[n] = arguments[n];
      }return os;
    }
  }

  function flat() {
    var r = [flatten];
    for (var i = 0, n = arguments[LENGTH]; i < n; ++i) {
      r.push(arguments[i], flatten);
    }return r;
  }

  // Recursing

  function lazy(o2o) {
    var _memo = function memo(x, i, C, xi2yC) {
      return (_memo = toFunction(o2o(rec)))(x, i, C, xi2yC);
    };
    function rec(x, i, C, xi2yC) {
      return _memo(x, i, C, xi2yC);
    }
    return rec;
  }

  // Adapting

  var choices = /*#__PURE__*/makeSemi(orElseU);

  var choose = function choose(xiM2o) {
    return copyName(function (x, i, C, xi2yC) {
      return toFunction(xiM2o(x, i))(x, i, C, xi2yC);
    }, xiM2o);
  };

  var cond = /*#__PURE__*/(function (fn$$1) {
    return function cond() {
      var pair = tup(ef(reqFn), ef(reqOptic));

      for (var _len = arguments.length, cs = Array(_len), _key = 0; _key < _len; _key++) {
        cs[_key] = arguments[_key];
      }

      arr(pair)(cs.slice(0, -1));
      arr(or(tup(ef(reqOptic)), pair))(cs.slice(-1));
      return fn$$1.apply(undefined, cs);
    };
  })(function cond() {
    var n = arguments[LENGTH];
    var r = zero;
    while (n--) {
      var c = arguments[n];
      r = c[LENGTH] < 2 ? toFunction(c[0]) : eitherU(toFunction(c[1]), r)(c[0]);
    }
    return r;
  });

  var condOf = /*#__PURE__*/(function (fn$$1) {
    return function condOf(of) {
      var pair = tup(ef(reqFn), ef(reqOptic));

      for (var _len2 = arguments.length, cs = Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
        cs[_key2 - 1] = arguments[_key2];
      }

      arr(pair)(cs.slice(0, -1));
      arr(or(tup(ef(reqOptic)), pair))(cs.slice(-1));
      return fn$$1.apply(undefined, [of].concat(cs));
    };
  })(function condOf(of) {
    of = toFunction(of);

    var n = arguments[LENGTH] - 1;
    if (!n) return zero;

    var def = arguments[n];
    if (def[LENGTH] === 1) {
      --n;
      def = toFunction(def[0]);
    } else {
      def = zero;
    }

    var ps = Array(n);
    var os = Array(n + 1);
    for (var i = 0; i < n; ++i) {
      var c = arguments[i + 1];
      ps[i] = c[0];
      os[i] = toFunction(c[1]);
    }
    os[n] = def;

    return function condOf(x, i, F, xi2yF) {
      var min = n;
      of(x, i, Select, function (y, j) {
        for (var _i10 = 0; _i10 < min; ++_i10) {
          if (ps[_i10](y, j)) {
            min = _i10;
            if (_i10 === 0) return 0;else break;
          }
        }
      });
      return os[min](x, i, F, xi2yF);
    };
  });

  var ifElse = /*#__PURE__*/I.curry(function ifElse(c, t, e) {
    return eitherU(toFunction(t), toFunction(e))(c);
  });

  var orElse = /*#__PURE__*/I.curry(orElseU);

  // Querying

  var chain = /*#__PURE__*/I.curry(function chain(xi2yO, xO) {
    return [xO, choose(function (xM, i) {
      return void 0 !== xM ? xi2yO(xM, i) : zero;
    })];
  });

  var choice = function choice() {
    for (var _len3 = arguments.length, os = Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {
      os[_key3] = arguments[_key3];
    }

    return os.reduceRight(orElseU, zero);
  };

  var unless = /*#__PURE__*/eitherU(zero, identity);

  var when = /*#__PURE__*/eitherU(identity, zero);

  var optional = /*#__PURE__*/when(I.isDefined);

  // Indices

  var mapIx = function mapIx(ix2j) {
    return function mapIx(x, i, F, xj2yF) {
      return xj2yF(x, ix2j(i, x));
    };
  };

  var setIx = function setIx(j) {
    return function setIx(x, _i, _F, xj2yF) {
      return xj2yF(x, j);
    };
  };

  var tieIx = /*#__PURE__*/I.curry(function tieIx(ij2k, o) {
    o = toFunction(o);
    return copyName(function (x, i, F, yk2zF) {
      return o(x, i, F, function (y, j) {
        return yk2zF(y, ij2k(j, i));
      });
    }, o);
  });

  var joinIx = /*#__PURE__*/setName( /*#__PURE__*/tieIx(function (j, i) {
    return void 0 !== i ? void 0 !== j ? [i, j] : i : j;
  }), 'joinIx');

  var reIx = function reIx(o) {
    o = toFunction(o);
    return copyName(function (x, i, F, xi2yF) {
      var j = 0;
      return o(x, i, F, function (x) {
        return xi2yF(x, j++);
      });
    }, o);
  };

  var skipIx = /*#__PURE__*/setName( /*#__PURE__*/tieIx(I.sndU), 'skipIx');

  // Debugging

  function getLog(l, s) {
    var _traverseU = traverseU(SelectLog, function (x) {
      return { p: [x, consExcept], x: x, c: x };
    }, l, s),
        p = _traverseU.p,
        c = _traverseU.c;

    p = pushTo(p, ['%O']);
    for (var i = 2; i < p[LENGTH]; ++i) {
      p[0] += ' <= %O';
    }console.log.apply(console, p);
    return c;
  }

  function log() {
    var show = I.curry(function log(dir, x) {
      console.log.apply(console, copyToFrom([], 0, arguments, 0, arguments[LENGTH]).concat([dir, x]));
      return x;
    });
    return isoU(show('get'), show('set'));
  }

  // Operations on transforms

  var transform = /*#__PURE__*/I.curry(function transform(o, s) {
    return modifyU(o, id, s);
  });

  var transformAsync = /*#__PURE__*/I.curry(function transformAsync(o, s) {
    return modifyAsyncU(o, id, s);
  });

  // Sequencing

  var seq = /*#__PURE__*/(function (fn$$1) {
    return function seq() {
      return par(2, ef(reqMonad('seq')))(fn$$1.apply(undefined, arguments));
    };
  })(function seq() {
    var n = arguments[LENGTH];
    var r = zero;
    if (n) {
      r = toFunction(arguments[--n]);
      while (n) {
        r = seq2U(toFunction(arguments[--n]), r);
      }
    }
    return r;
  });

  // Creating new traversals

  var branchOr = /*#__PURE__*/(par(1, ef(reqTemplate('branchOr'))))( /*#__PURE__*/I.curryN(2, function branchOr(otherwise) {
    otherwise = toFunction(otherwise);
    return function branchOr(template) {
      return branchOrU(otherwise, template);
    };
  }));

  var branch = /*#__PURE__*/branchOr(zero);

  function branches() {
    var n = arguments[LENGTH];
    var template = {};
    for (var i = 0; i < n; ++i) {
      template[arguments[i]] = identity;
    }return branch(template);
  }

  // Traversals and combinators

  function elems(xs, i, A, xi2yA) {
    return seemsArrayLike(xs) ? elemsI(xs, i, A, xi2yA) : A.of(xs);
  }

  var elemsTotal = function elemsTotal(xs, i, A, xi2yA) {
    return seemsArrayLike(xs) ? A === I.Identity ? mapPartialIndexU(xi2yA, xs, mapPartialIndexU) : A === Select ? selectInArrayLike(xi2yA, xs) : traversePartialIndex(A, xi2yA, xs, traversePartialIndex) : A.of(xs);
  };

  var entries = /*#__PURE__*/setName( /*#__PURE__*/toFunction([keyed, elems]), 'entries');

  var keys = /*#__PURE__*/setName( /*#__PURE__*/toFunction([keyed, elems, 0]), 'keys');

  var keysEverywhere = function keysEverywhere(x, i, A, xi2yA) {
    var recEntry = function recEntry(kv, i) {
      return A.ap(A.map(pairPartial, xi2yA(kv[0], i)), recAny(kv[1], i));
    };
    var recAny = function recAny(x, i) {
      return I.isArray(x) ? elemsI(x, i, A, recAny) : I.isObject(x) ? entries(x, i, A, recEntry) : A.of(x);
    };
    return recAny(x, i);
  };

  var subseq = /*#__PURE__*/I.curry(subseqU);

  var limit = /*#__PURE__*/subseq(0);

  var offset = /*#__PURE__*/I.curry(function offset(begin, t) {
    return subseqU(begin, void 0, t);
  });

  function matches(re) {
    return function matches(x, _i, C, xi2yC) {
      if (I.isString(x)) {
        var map = C.map;

        if (re.global) {
          var m0 = [''];
          m0.input = x;
          m0[INDEX] = 0;
          if (Select === C) {
            return iterSelect(xi2yC, re, m0);
          } else {
            var ap = C.ap,
                of = C.of;

            return map(matchesJoin(x), iterEager(map, ap, of, xi2yC, re, m0));
          }
        } else {
          var m = x.match(re);
          if (m) return map(function (y) {
            return x.replace(re, void 0 !== y ? y : '');
          }, xi2yC(m[0], m[INDEX]));
        }
      }
      return C.of(x);
    };
  }

  var values = /*#__PURE__*/setName( /*#__PURE__*/branchOr1Level(identity, protoless0), 'values');

  function children(x, i, C, xi2yC) {
    return I.isArray(x) ? elemsI(x, i, C, xi2yC) : I.isObject(x) ? values(x, i, C, xi2yC) : C.of(x);
  }

  function flatten(x, i, C, xi2yC) {
    var rec = function rec(x, i) {
      return I.isArray(x) ? elemsI(x, i, C, rec) : void 0 !== x ? xi2yC(x, i) : C.of(x);
    };
    return rec(x, i);
  }

  function query() {
    var r = [];
    for (var i = 0, n = arguments[LENGTH]; i < n; ++i) {
      var o = toFunction(arguments[i]);
      r.push(satisfying(isDefinedAt(o)), o);
    }
    return r;
  }

  var satisfying = function satisfying(p) {
    return function satisfying(x, i, C, xi2yC) {
      var rec = function rec(x, i) {
        return p(x, i) ? xi2yC(x, i) : children(x, i, C, rec);
      };
      return rec(x, i);
    };
  };

  var leafs = /*#__PURE__*/satisfying(function (x) {
    return void 0 !== x && !I.isArray(x) && !I.isObject(x);
  });

  var whereEq = function whereEq(template) {
    return satisfying(and$1(branch(modify(leafs, is, template))));
  };

  // Folds over traversals

  var all = /*#__PURE__*/I.curry(function all(xi2b, t, s) {
    return !getAsU(function (x, i) {
      if (!xi2b(x, i)) return true;
    }, t, s);
  });

  var and$1 = /*#__PURE__*/all(id);

  var all1 = /*#__PURE__*/I.curry(function all1(xi2b, t, s) {
    var result = false;
    getAsU(function (x, i) {
      if (xi2b(x, i)) result = true;else return result = false;
    }, t, s);
    return result;
  });

  var and1 = /*#__PURE__*/all1(id);

  var any = /*#__PURE__*/I.curry(function any(xi2b, t, s) {
    return !!getAsU(function (x, i) {
      if (xi2b(x, i)) return true;
    }, t, s);
  });

  var collectAs = /*#__PURE__*/(res(I.freeze))(function collectAs(xi2y, t, s) {
    var results = [];
    getAsU(function (x, i) {
      var y = xi2y(x, i);
      if (void 0 !== y) results.push(y);
    }, t, s);
    return results;
  });

  var collect = /*#__PURE__*/collectAs(id);

  var collectTotalAs = /*#__PURE__*/(res(I.freeze))(function collectTotalAs(xi2y, t, s) {
    var results = [];
    getAsU(function (x, i) {
      results.push(xi2y(x, i));
    }, t, s);
    return results;
  });

  var collectTotal = /*#__PURE__*/collectTotalAs(id);

  var concatAs = /*#__PURE__*/mkTraverse(id, ConstantOf);

  var concat = /*#__PURE__*/concatAs(id);

  var countIf = /*#__PURE__*/I.curry(function countIf(p, t, s) {
    return traverseU(Sum, function (x, i) {
      return p(x, i) ? 1 : 0;
    }, t, s);
  });

  var count = /*#__PURE__*/countIf(I.isDefined);

  var countsAs = /*#__PURE__*/I.curry(function countsAs(xi2k, t, s) {
    var counts = new Map();
    getAsU(function (x, i) {
      var k = xi2k(x, i);
      var n = counts.get(k);
      counts.set(k, void 0 !== n ? n + 1 : 1);
    }, t, s);
    return counts;
  });

  var counts = /*#__PURE__*/countsAs(id);

  var foldl = /*#__PURE__*/I.curry(function foldl(f, r, t, s) {
    getAsU(function (x, i) {
      r = f(r, x, i);
    }, t, s);
    return r;
  });

  var foldr = /*#__PURE__*/I.curry(function foldr(f, r, t, s) {
    var is = [];
    var xs = [];
    getAsU(function (x, i) {
      xs.push(x);
      is.push(i);
    }, t, s);
    for (var i = xs[LENGTH] - 1; 0 <= i; --i) {
      r = f(r, xs[i], is[i]);
    }return r;
  });

  var forEach = /*#__PURE__*/I.curry(function forEach(f, t, s) {
    return getAsU(function (x, i) {
      f(x, i);
    }, t, s);
  });

  var forEachWith = /*#__PURE__*/I.curry(function forEachWith(newC, ef$$1, t, s) {
    var c = newC();
    getAsU(function (x, i) {
      ef$$1(c, x, i);
    }, t, s);
    return c;
  });

  function get(l, s) {
    return 1 < arguments[LENGTH] ? getAsU(id, l, s) : function (s) {
      return getAsU(id, l, s);
    };
  }

  var getAs = /*#__PURE__*/I.curry(getAsU);

  var isDefined = /*#__PURE__*/I.curry(function isDefined(t, s) {
    return void 0 !== getAsU(id, t, s);
  });

  var isEmpty = /*#__PURE__*/I.curry(function isEmpty(t, s) {
    return !getAsU(toTrue, t, s);
  });

  var joinAs = /*#__PURE__*/mkTraverse(toStringPartial, /*#__PURE__*/(par(0, ef(reqString('`join` and `joinAs` expect a string delimiter'))))(function joinAs(d) {
    return ConstantWith(function (x, y) {
      return void 0 !== x ? void 0 !== y ? x + d + y : x : y;
    });
  }));

  var join = /*#__PURE__*/joinAs(id);

  var maximumBy = /*#__PURE__*/mumBy(gtU);

  var maximum = /*#__PURE__*/maximumBy(id);

  var meanAs = /*#__PURE__*/I.curry(function meanAs(xi2y, t, s) {
    var sum = 0;
    var num = 0;
    getAsU(function (x, i) {
      var y = xi2y(x, i);
      if (void 0 !== y) {
        num += 1;
        sum += y;
      }
    }, t, s);
    return sum / num;
  });

  var mean = /*#__PURE__*/meanAs(id);

  var minimumBy = /*#__PURE__*/mumBy(ltU);

  var minimum = /*#__PURE__*/minimumBy(id);

  var none = /*#__PURE__*/I.curry(function none(xi2b, t, s) {
    return !getAsU(function (x, i) {
      if (xi2b(x, i)) return true;
    }, t, s);
  });

  var or$1 = /*#__PURE__*/any(id);

  var productAs = /*#__PURE__*/traverse( /*#__PURE__*/ConstantWith(multiplyU, 1));

  var product = /*#__PURE__*/productAs( /*#__PURE__*/unto(1));

  var select = I.curry(function select(l, s) {
    warn(select, '`select` has been obsoleted.  Just use `get`.  See CHANGELOG for details.');
    return get(l, s);
  });

  var selectAs = I.curry(function selectAs(f, l, s) {
    warn(selectAs, '`selectAs` has been obsoleted.  Just use `getAs`.  See CHANGELOG for details.');
    return getAs(f, l, s);
  });

  var sumAs = /*#__PURE__*/traverse(Sum);

  var sum = /*#__PURE__*/sumAs(unto0);

  // Creating new lenses

  var foldTraversalLens = /*#__PURE__*/I.curry(function foldTraversalLens(fold, traversal) {
    return lensU(fold(traversal), set(traversal));
  });

  var getter = function getter(get) {
    return function (x, i, F, xi2yF) {
      return xi2yF(get(x, i), i);
    };
  };

  var lens = /*#__PURE__*/I.curry(lensU);

  function partsOf(t) {
    if (arguments[LENGTH] !== 1) t = toFunction(compose.apply(null, arguments));
    return function partsOf(x, i, F, xi2yF) {
      return F.map(function (y) {
        return disperseU(t, y, x);
      }, xi2yF(collectTotal(t, x), i));
    };
  }

  var setter = /*#__PURE__*/lens(id);

  // Enforcing invariants

  function defaults(out) {
    function o2u(x) {
      return replaced(out, void 0, x);
    }
    return function defaults(x, i, F, xi2yF) {
      return F.map(o2u, xi2yF(void 0 !== x ? x : out, i));
    };
  }

  function define(v) {
    var untoV = unto(v);
    return function define(x, i, F, xi2yF) {
      return F.map(untoV, xi2yF(void 0 !== x ? x : v, i));
    };
  }

  var normalize = function normalize(xi2x) {
    return [reread(xi2x), rewrite(xi2x)];
  };

  function required(inn) {
    return replace$1(inn, void 0);
  }

  var reread = function reread(xi2x) {
    return function (x, i, _F, xi2yF) {
      return xi2yF(void 0 !== x ? xi2x(x, i) : x, i);
    };
  };

  var rewrite = function rewrite(yi2y) {
    return function (x, i, F, xi2yF) {
      return F.map(function (y) {
        return void 0 !== y ? yi2y(y, i) : y;
      }, xi2yF(x, i));
    };
  };

  // Lensing arrays

  var filter = /*#__PURE__*/(res(function (lens) {
    return toFunction([lens, isoU(id, ef(reqMaybeArray('`filter` must be set with undefined or an array-like object')))]);
  }))(function filter(xi2b) {
    return function filter(xs, i, F, xi2yF) {
      var ts = void 0;
      var fs = I.array0;
      if (seemsArrayLike(xs)) partitionIntoIndex(xi2b, xs, ts = [], fs = []);
      return F.map(function (ts) {
        var tsN = ts ? ts[LENGTH] : 0;
        var fsN = fs[LENGTH];
        var n = tsN + fsN;
        return n === fsN ? fs : copyToFrom(copyToFrom(Array(n), 0, ts, 0, tsN), tsN, fs, 0, fsN);
      }, xi2yF(ts, i));
    };
  });

  function find(xih2b) {
    var hint = arguments[LENGTH] > 1 ? arguments[1] : { hint: 0 };
    return function find(xs, _i, F, xi2yF) {
      var ys = seemsArrayLike(xs) ? xs : '';
      var i = hint.hint = findIndexHint(hint, xih2b, ys);
      return F.map(function (v) {
        return setIndex(i, v, ys);
      }, xi2yF(ys[i], i));
    };
  }

  function findWith(o) {
    var oo = toFunction(o);
    var p = isDefinedAt(oo);
    return [arguments[LENGTH] > 1 ? find(p, arguments[1]) : find(p), oo];
  }

  var first = 0;

  var index = ef(reqIndex);

  var last = /*#__PURE__*/choose(function last(maybeArray) {
    return seemsArrayLike(maybeArray) && maybeArray[LENGTH] ? maybeArray[LENGTH] - 1 : 0;
  });

  var prefix = function prefix(n) {
    return slice(0, n);
  };

  var slice = /*#__PURE__*/(res(function (lens) {
    return toFunction([lens, isoU(id, ef(reqMaybeArray('`slice` must be set with undefined or an array-like object')))]);
  }))(function slice(begin, end) {
    return function slice(xs, i, F, xsi2yF) {
      var seems = seemsArrayLike(xs);
      var xsN = seems && xs[LENGTH];
      var b = sliceIndex(0, xsN, 0, begin);
      var e = sliceIndex(b, xsN, xsN, end);
      return F.map(function (zs) {
        var zsN = zs ? zs[LENGTH] : 0;
        var bPzsN = b + zsN;
        var n = xsN - e + bPzsN;
        return copyToFrom(copyToFrom(copyToFrom(Array(n), 0, xs, 0, b), b, zs, 0, zsN), bPzsN, xs, e, xsN);
      }, xsi2yF(seems ? copyToFrom(Array(Math.max(0, e - b)), 0, xs, b, e) : void 0, i));
    };
  });

  var suffix = function suffix(n) {
    return slice(0 === n ? Infinity : !n ? 0 : -n, void 0);
  };

  // Lensing objects

  var pickIn = function pickIn(t) {
    return I.isObject(t) ? pick(modify(values, pickInAux, t)) : t;
  };

  var prop = function (x) {
    if (!I.isString(x)) errorGiven('`prop` expects a string', x);
    return x;
  };

  function props() {
    var n = arguments[LENGTH];
    var template = {};
    for (var i = 0, k; i < n; ++i) {
      template[k = arguments[i]] = k;
    }return pick(template);
  }

  function propsExcept() {
    var setish = I.create(null);
    for (var i = 0, n = arguments[LENGTH]; i < n; ++i) {
      setish[arguments[i]] = 'd';
    }return [disjoint(function (k) {
      return setish[k] || 't';
    }), 't'];
  }

  var propsOf = function propsOf(o) {
    warn(propsOf, '`propsOf` has been deprecated and there is no replacement.  See CHANGELOG for details.');
    return props.apply(null, I.keys(o));
  };

  function removable() {
    for (var _len4 = arguments.length, ps = Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {
      ps[_key4] = arguments[_key4];
    }

    function drop(y) {
      if (!(y instanceof Object)) return y;
      for (var i = 0, n = ps[LENGTH]; i < n; ++i) {
        if (I.hasU(ps[i], y)) return y;
      }
    }
    return function (x, i, F, xi2yF) {
      return F.map(drop, xi2yF(x, i));
    };
  }

  // Providing defaults

  var valueOr = function valueOr(v) {
    return function (x, i, _F, xi2yF) {
      return xi2yF(x != null ? x : v, i);
    };
  };

  // Transforming data

  var pick = /*#__PURE__*/(par(0, ef(reqTemplate('pick'))))(function pick(template) {
    return function (x, i, F, xi2yF) {
      return F.map(function (v) {
        return setPick(template, v, x);
      }, xi2yF(getPick(template, x), i));
    };
  });

  var replace$1 = /*#__PURE__*/I.curry(function replace$$1(inn, out) {
    function o2i(x) {
      return replaced(out, inn, x);
    }
    return function replace$$1(x, i, F, xi2yF) {
      return F.map(o2i, xi2yF(replaced(inn, out, x), i));
    };
  });

  // Inserters

  function appendTo(xs, _, F, xi2yF) {
    var i = seemsArrayLike(xs) ? xs[LENGTH] : 0;
    return F.map(function (x) {
      return setIndex(i, x, xs);
    }, xi2yF(void 0, i));
  }

  var append = function append(x, i, F, xi2yF) {
    warn(append, '`append` has been renamed to `appendTo`.  See CHANGELOG for details.');
    return appendTo(x, i, F, xi2yF);
  };

  var assignTo = /*#__PURE__*/(function (iso) {
    return copyName(toFunction([isoU(id, I.freeze), iso]), iso);
  })(function assignTo(x, i, F, xi2yF) {
    return F.map(function (y) {
      return I.assign({}, x instanceof Object ? x : null, y);
    }, xi2yF(void 0, i));
  });

  var prependTo = /*#__PURE__*/setName( /*#__PURE__*/toFunction([/*#__PURE__*/prefix(0), 0]), 'prependTo');

  // Transforming

  var appendOp = /*#__PURE__*/setName( /*#__PURE__*/inserterOp(appendTo), 'appendOp');

  var assignOp = /*#__PURE__*/setName( /*#__PURE__*/inserterOp(assignTo), 'assignOp');

  var modifyOp = function modifyOp(xi2y) {
    return function modifyOp(x, i, C, _xi2yC) {
      return C.of(xi2y(x, i));
    };
  };

  var prependOp = /*#__PURE__*/setName( /*#__PURE__*/inserterOp(prependTo), 'prependOp');

  var setOp = function setOp(y) {
    return function setOp(_x, _i, C, _xi2yC) {
      return C.of(y);
    };
  };

  var removeOp = /*#__PURE__*/setOp();

  var cross = /*#__PURE__*/setName( /*#__PURE__*/crossOr(removeOp), 'cross');

  // Operations on isomorphisms

  function getInverse(o, s) {
    return 1 < arguments[LENGTH] ? getInverseU(o, s) : function (s) {
      return getInverseU(o, s);
    };
  }

  // Creating new isomorphisms

  var iso = /*#__PURE__*/I.curry(isoU);

  var _ = /*#__PURE__*/new Variable(-1);

  function mapping(ps) {
    var n = 0;
    if (I.isFunction(ps)) ps = ps.apply(null, nVars(n = ps[LENGTH]));
    checkPatternPairInDev(ps);
    var kinds = Array(n);
    var ms = ps.map(function (p) {
      return toMatch(kinds, p);
    });
    var ss = ps.map(toSubst);
    return isoU(oneway(n, ms[0], ss[1]), oneway(n, ms[1], ss[0]));
  }

  function mappings(ps) {
    if (I.isFunction(ps)) ps = ps.apply(null, nVars(ps[LENGTH]));
    return alternatives.apply(null, ps.map(mapping));
  }

  function pattern(p) {
    var n = 0;
    if (I.isFunction(p)) p = p.apply(null, nVars(n = p[LENGTH]));
    checkPatternInDev(p);
    var kinds = Array(n);
    var m = toMatch(kinds, p);
    return subset(function (x) {
      return m(Array(n), x);
    });
  }

  function patterns(ps) {
    if (I.isFunction(ps)) ps = ps.apply(null, nVars(ps[LENGTH]));
    return alternatives.apply(null, ps.map(pattern));
  }

  // Isomorphism combinators

  var alternatives = /*#__PURE__*/makeSemi(orAlternativelyU);

  var applyAt = /*#__PURE__*/I.curry(function applyAt(elements, transform) {
    return isoU(modify(elements, get(transform)), modify(elements, getInverse(transform)));
  });

  var attemptEveryDown = function attemptEveryDown(iso) {
    return isoU(transformEvery(rereadAttempt(get(iso))), transformEvery(rewriteAttempt(getInverse(iso))));
  };

  var attemptEveryUp = function attemptEveryUp(iso) {
    return isoU(transformEvery(rewriteAttempt(get(iso))), transformEvery(rereadAttempt(getInverse(iso))));
  };

  var attemptSomeDown = function attemptSomeDown(iso) {
    return isoU(transformSome(get(iso)), transformSome(getInverse(iso)));
  };

  var conjugate = /*#__PURE__*/I.curry(function conjugate(outer, inner) {
    return [outer, inner, inverse(outer)];
  });

  var inverse = function inverse(iso) {
    return function (x, i, F, xi2yF) {
      return F.map(function (x) {
        return getAsU(id, iso, x);
      }, xi2yF(setU(iso, x, void 0), i));
    };
  };

  var iterate = function iterate(aIa) {
    return isoU(iteratePartial(get(aIa)), iteratePartial(getInverse(aIa)));
  };

  var orAlternatively = /*#__PURE__*/I.curry(orAlternativelyU);

  var fold = function fold(saIs) {
    return isoU(foldPartial(get(saIs)), unfoldPartial(getInverse(saIs)));
  };

  var unfold = function unfold(sIsa) {
    return isoU(unfoldPartial(get(sIsa)), foldPartial(getInverse(sIsa)));
  };

  // Basic isomorphisms

  var complement = /*#__PURE__*/isoU(notPartial, notPartial);

  var is = function is(v) {
    return isoU(function is(x) {
      return I.acyclicEqualsU(v, x);
    }, function (b) {
      return true === b ? v : void 0;
    });
  };

  function subset(predicate) {
    var subsetFn = subsetPartial(predicate);
    return isoU(subsetFn, subsetFn);
  }

  // Array isomorphisms

  var array = function array(elem) {
    var fwd = getInverse(elem);
    var bwd = get(elem);
    var mapFwd = function mapFwd(x) {
      return mapIfArrayLike(fwd, x);
    };
    return function (x, i, F, xi2yF) {
      return F.map(mapFwd, xi2yF(mapIfArrayLike(bwd, x), i));
    };
  };

  var arrays = function arrays(elem) {
    var fwd = getInverse(elem);
    var bwd = get(elem);
    var mapFwd = function mapFwd(x) {
      return mapsIfArray(fwd, x);
    };
    return function (x, i, F, xi2yF) {
      return F.map(mapFwd, xi2yF(mapsIfArray(bwd, x), i));
    };
  };

  var indexed = /*#__PURE__*/isoU( /*#__PURE__*/expect(seemsArrayLike, /*#__PURE__*/(res(freezeObjectOfObjects))(function indexed(xs) {
    var n = xs[LENGTH];
    var xis = Array(n);
    for (var i = 0; i < n; ++i) {
      xis[i] = [i, xs[i]];
    }return xis;
  })), /*#__PURE__*/expect(I.isArray, /*#__PURE__*/(res(I.freeze))(function (xis) {
    var n = xis[LENGTH];
    var xs = Array(n);
    for (var i = 0; i < n; ++i) {
      var xi = xis[i];
      if (xi[LENGTH] === 2) xs[xi[0]] = xi[1];
    }
    n = xs[LENGTH];
    var j = 0;
    for (var _i11 = 0; _i11 < n; ++_i11) {
      var x = xs[_i11];
      if (void 0 !== x) {
        if (_i11 !== j) xs[j] = x;
        ++j;
      }
    }
    xs[LENGTH] = j;
    return xs;
  })));

  var reverse = /*#__PURE__*/isoU(rev, rev);

  var singleton = /*#__PURE__*/setName( /*#__PURE__*/mapping(function (x) {
    return [[x], x];
  }), 'singleton');

  var groupBy = function groupBy(keyOf) {
    keyOf = toGetter(keyOf);
    return isoU(groupByFn(keyOf), ungroupByFn(keyOf));
  };

  var ungroupBy = function ungroupBy(keyOf) {
    keyOf = toGetter(keyOf);
    return isoU(ungroupByFn(keyOf), groupByFn(keyOf));
  };

  var zipWith1 = function zipWith1(iso) {
    return isoU(zW1Fn(get(iso)), unzW1Fn(getInverse(iso)));
  };

  var unzipWith1 = function unzipWith1(iso) {
    return isoU(unzW1Fn(get(iso)), zW1Fn(getInverse(iso)));
  };

  // Object isomorphisms

  var disjoint = function disjoint(groupOf) {
    return function disjoint(x, i, F, xi2yF) {
      var fwd = disjointFwd(groupOf);
      return F.map(fwd, xi2yF(disjointBwd(groupOf, x), i));
    };
  };

  var multikeyed = /*#__PURE__*/isoU( /*#__PURE__*/expect( /*#__PURE__*/isInstanceOf(Object), /*#__PURE__*/(res(freezeObjectOfObjects))(function multikeyed(o) {
    o = toObject(o);
    var ps = [];
    for (var k in o) {
      var v = o[k];
      if (I.isArray(v)) for (var i = 0, n = v[LENGTH]; i < n; ++i) {
        ps.push([k, v[i]]);
      } else ps.push([k, v]);
    }
    return ps;
  })), /*#__PURE__*/expect(I.isArray, /*#__PURE__*/(res(freezeObjectOfObjects))(function (ps) {
    var o = I.create(null);
    for (var i = 0, n = ps[LENGTH]; i < n; ++i) {
      var entry = ps[i];
      if (entry[LENGTH] === 2) {
        var k = entry[0];
        var v = entry[1];
        var was = o[k];
        if (was === void 0) o[k] = v;else if (I.isArray(was)) was.push(v);else o[k] = [was, v];
      }
    }
    return I.assign({}, o);
  })));

  // Standard isomorphisms

  var json = /*#__PURE__*/(res(function (iso) {
    return toFunction([iso, isoU(deepFreezeInDev, id)]);
  }))(function json(options) {
    var _ref3 = options || I.object0,
        reviver = _ref3.reviver,
        replacer = _ref3.replacer,
        space = _ref3.space;

    return isoU(expect(I.isString, tryCatch(function json(text) {
      return JSON.parse(text, reviver);
    })), expect(I.isDefined, function (value) {
      return JSON.stringify(value, replacer, space);
    }));
  });

  var uri = /*#__PURE__*/stringIsoU( /*#__PURE__*/tryCatch(decodeURI), encodeURI);

  var uriComponent = /*#__PURE__*/isoU( /*#__PURE__*/expect(I.isString, /*#__PURE__*/tryCatch(decodeURIComponent)), /*#__PURE__*/expect(isPrimitiveData, encodeURIComponent));

  // String isomorphisms

  var dropPrefix = function dropPrefix(pfx) {
    return stringIsoU(function dropPrefix(x) {
      return x.startsWith(pfx) ? x.slice(pfx[LENGTH]) : undefined;
    }, function (x) {
      return pfx + x;
    });
  };

  var dropSuffix = function dropSuffix(sfx) {
    return stringIsoU(function dropSuffix(x) {
      return x.endsWith(sfx) ? x.slice(0, x[LENGTH] - sfx[LENGTH]) : undefined;
    }, function (x) {
      return x + sfx;
    });
  };

  var replaces = /*#__PURE__*/I.curry(function replaces(i, o) {
    return stringIsoU(replace(toRegExpU(i, 'g'), o), replace(toRegExpU(o, 'g'), i));
  });

  var split = /*#__PURE__*/(function (fn$$1) {
    return function split(_sep) {
      return toFunction([fn$$1.apply(null, arguments), isoU(I.freeze, id)]);
    };
  })(function split(sep) {
    var re = arguments[LENGTH] > 1 ? arguments[1] : sep;
    return isoU(expect(I.isString, function (x) {
      return x.split(re);
    }), expect(I.isArray, function (xs) {
      return xs.join(sep);
    }));
  });

  var uncouple = /*#__PURE__*/(function (fn$$1) {
    return function uncouple(_sep) {
      return toFunction([fn$$1.apply(null, arguments), isoU(I.freeze, id)]);
    };
  })(function uncouple(sep) {
    var re = toRegExpU(arguments[LENGTH] > 1 ? arguments[1] : sep, '');
    return isoU(expect(I.isString, function (x) {
      var m = re.exec(x);
      return m ? [x.slice(0, m[INDEX]), x.slice(reLastIndex(m))] : [x, ''];
    }), function (kv) {
      if (isPair(kv)) {
        var k = kv[0];
        var v = kv[1];
        return v ? k + sep + v : k;
      }
    });
  });

  // Standardish isomorphisms

  var querystring = /*#__PURE__*/setName( /*#__PURE__*/toFunction([/*#__PURE__*/reread(function (s) {
    return I.isString(s) ? s.replace(/\+/g, '%20') : s;
  }), /*#__PURE__*/split('&'), /*#__PURE__*/array([/*#__PURE__*/uncouple('='), /*#__PURE__*/array(uriComponent)]), /*#__PURE__*/inverse(multikeyed)]), 'querystring');

  // Arithmetic isomorphisms

  var add$1 = function add$$1(c) {
    return numberIsoU(add(c), add(-c));
  };
  var divide = function divide(c) {
    return numberIsoU(divideBy(c), multiply(c));
  };
  var multiply$1 = function multiply$$1(c) {
    return numberIsoU(multiply(c), divideBy(c));
  };
  var negate$1 = /*#__PURE__*/numberIsoU(negate, negate);
  var subtract = function subtract(c) {
    return numberIsoU(add(-c), add(c));
  };

  var pointer = function pointer(s) {
    if (s[0] === '#') s = decodeURIComponent(s);
    var ts = s.split('/');
    var n = ts[LENGTH];
    for (var i = 1; i < n; ++i) {
      var t = ts[i];
      ts[i - 1] = /^(0|[1-9]\d*)$/.test(t) ? ifElse(isArrayOrPrimitive, Number(t), t) : '-' === t ? ifElse(isArrayOrPrimitive, append, t) : t.replace('~1', '/').replace('~0', '~');
    }
    ts[LENGTH] = n - 1;
    return ts;
  };

  exports.Identity = I.Identity;
  exports.IdentityAsync = I.IdentityAsync;
  exports.FantasyFunctor = I.FantasyFunctor;
  exports.fromFantasy = I.fromFantasy;
  exports.fromFantasyApplicative = I.fromFantasyApplicative;
  exports.fromFantasyMonad = I.fromFantasyMonad;
  exports.seemsArrayLike = seemsArrayLike;
  exports.Select = Select;
  exports.toFunction = toFunction;
  exports.assign = assign;
  exports.disperse = disperse;
  exports.modify = modify;
  exports.modifyAsync = modifyAsync;
  exports.remove = remove;
  exports.set = set;
  exports.traverse = traverse;
  exports.compose = compose;
  exports.flat = flat;
  exports.lazy = lazy;
  exports.choices = choices;
  exports.choose = choose;
  exports.cond = cond;
  exports.condOf = condOf;
  exports.ifElse = ifElse;
  exports.orElse = orElse;
  exports.chain = chain;
  exports.choice = choice;
  exports.unless = unless;
  exports.when = when;
  exports.optional = optional;
  exports.zero = zero;
  exports.mapIx = mapIx;
  exports.setIx = setIx;
  exports.tieIx = tieIx;
  exports.joinIx = joinIx;
  exports.reIx = reIx;
  exports.skipIx = skipIx;
  exports.getLog = getLog;
  exports.log = log;
  exports.transform = transform;
  exports.transformAsync = transformAsync;
  exports.seq = seq;
  exports.branchOr = branchOr;
  exports.branch = branch;
  exports.branches = branches;
  exports.elems = elems;
  exports.elemsTotal = elemsTotal;
  exports.entries = entries;
  exports.keys = keys;
  exports.keysEverywhere = keysEverywhere;
  exports.subseq = subseq;
  exports.limit = limit;
  exports.offset = offset;
  exports.matches = matches;
  exports.values = values;
  exports.children = children;
  exports.flatten = flatten;
  exports.query = query;
  exports.satisfying = satisfying;
  exports.leafs = leafs;
  exports.whereEq = whereEq;
  exports.all = all;
  exports.and = and$1;
  exports.all1 = all1;
  exports.and1 = and1;
  exports.any = any;
  exports.collectAs = collectAs;
  exports.collect = collect;
  exports.collectTotalAs = collectTotalAs;
  exports.collectTotal = collectTotal;
  exports.concatAs = concatAs;
  exports.concat = concat;
  exports.countIf = countIf;
  exports.count = count;
  exports.countsAs = countsAs;
  exports.counts = counts;
  exports.foldl = foldl;
  exports.foldr = foldr;
  exports.forEach = forEach;
  exports.forEachWith = forEachWith;
  exports.get = get;
  exports.getAs = getAs;
  exports.isDefined = isDefined;
  exports.isEmpty = isEmpty;
  exports.joinAs = joinAs;
  exports.join = join;
  exports.maximumBy = maximumBy;
  exports.maximum = maximum;
  exports.meanAs = meanAs;
  exports.mean = mean;
  exports.minimumBy = minimumBy;
  exports.minimum = minimum;
  exports.none = none;
  exports.or = or$1;
  exports.productAs = productAs;
  exports.product = product;
  exports.select = select;
  exports.selectAs = selectAs;
  exports.sumAs = sumAs;
  exports.sum = sum;
  exports.foldTraversalLens = foldTraversalLens;
  exports.getter = getter;
  exports.lens = lens;
  exports.partsOf = partsOf;
  exports.setter = setter;
  exports.defaults = defaults;
  exports.define = define;
  exports.normalize = normalize;
  exports.required = required;
  exports.reread = reread;
  exports.rewrite = rewrite;
  exports.filter = filter;
  exports.find = find;
  exports.findWith = findWith;
  exports.first = first;
  exports.index = index;
  exports.last = last;
  exports.prefix = prefix;
  exports.slice = slice;
  exports.suffix = suffix;
  exports.pickIn = pickIn;
  exports.prop = prop;
  exports.props = props;
  exports.propsExcept = propsExcept;
  exports.propsOf = propsOf;
  exports.removable = removable;
  exports.valueOr = valueOr;
  exports.pick = pick;
  exports.replace = replace$1;
  exports.appendTo = appendTo;
  exports.append = append;
  exports.assignTo = assignTo;
  exports.prependTo = prependTo;
  exports.appendOp = appendOp;
  exports.assignOp = assignOp;
  exports.modifyOp = modifyOp;
  exports.prependOp = prependOp;
  exports.setOp = setOp;
  exports.removeOp = removeOp;
  exports.cross = cross;
  exports.getInverse = getInverse;
  exports.iso = iso;
  exports._ = _;
  exports.mapping = mapping;
  exports.mappings = mappings;
  exports.pattern = pattern;
  exports.patterns = patterns;
  exports.alternatives = alternatives;
  exports.applyAt = applyAt;
  exports.attemptEveryDown = attemptEveryDown;
  exports.attemptEveryUp = attemptEveryUp;
  exports.attemptSomeDown = attemptSomeDown;
  exports.conjugate = conjugate;
  exports.inverse = inverse;
  exports.iterate = iterate;
  exports.orAlternatively = orAlternatively;
  exports.fold = fold;
  exports.unfold = unfold;
  exports.complement = complement;
  exports.identity = identity;
  exports.is = is;
  exports.subset = subset;
  exports.array = array;
  exports.arrays = arrays;
  exports.indexed = indexed;
  exports.reverse = reverse;
  exports.singleton = singleton;
  exports.groupBy = groupBy;
  exports.ungroupBy = ungroupBy;
  exports.zipWith1 = zipWith1;
  exports.unzipWith1 = unzipWith1;
  exports.disjoint = disjoint;
  exports.keyed = keyed;
  exports.multikeyed = multikeyed;
  exports.json = json;
  exports.uri = uri;
  exports.uriComponent = uriComponent;
  exports.dropPrefix = dropPrefix;
  exports.dropSuffix = dropSuffix;
  exports.replaces = replaces;
  exports.split = split;
  exports.uncouple = uncouple;
  exports.querystring = querystring;
  exports.add = add$1;
  exports.divide = divide;
  exports.multiply = multiply$1;
  exports.negate = negate$1;
  exports.subtract = subtract;
  exports.pointer = pointer;

  Object.defineProperty(exports, '__esModule', { value: true });

})));