generic-type-guard/generic-type-guard.js

Generic type guards for TypeScript

// dist/utils.js
var __extends = /* @__PURE__ */ function() {
  var extendStatics = function(d, b) {
    extendStatics = Object.setPrototypeOf || { __proto__: [] } instanceof Array && function(d2, b2) {
      d2.__proto__ = b2;
    } || function(d2, b2) {
      for (var p in b2) if (Object.prototype.hasOwnProperty.call(b2, p)) d2[p] = b2[p];
    };
    return extendStatics(d, b);
  };
  return function(d, b) {
    if (typeof b !== "function" && b !== null)
      throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
    extendStatics(d, b);
    function __() {
      this.constructor = d;
    }
    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
  };
}();
var __values = function(o) {
  var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
  if (m) return m.call(o);
  if (o && typeof o.length === "number") return {
    next: function() {
      if (o && i >= o.length) o = void 0;
      return { value: o && o[i++], done: !o };
    }
  };
  throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
};
var AssertionError = (
  /** @class */
  function(_super) {
    __extends(AssertionError2, _super);
    function AssertionError2(value, message) {
      var _this = _super.call(this, message) || this;
      _this.value = value;
      _this.name = _this.constructor.name;
      return _this;
    }
    return AssertionError2;
  }(RangeError)
);
var assert = function(value, guard, message) {
  if (!guard(value)) {
    throw new AssertionError(value, message !== null && message !== void 0 ? message : "Invalid value provided: ".concat(JSON.stringify(value)));
  }
};
var combine = function() {
  var guards = [];
  for (var _i = 0; _i < arguments.length; _i++) {
    guards[_i] = arguments[_i];
  }
  return function(v) {
    var e_1, _a;
    try {
      for (var guards_1 = __values(guards), guards_1_1 = guards_1.next(); !guards_1_1.done; guards_1_1 = guards_1.next()) {
        var guard = guards_1_1.value;
        if (!guard(v)) {
          return false;
        }
      }
    } catch (e_1_1) {
      e_1 = { error: e_1_1 };
    } finally {
      try {
        if (guards_1_1 && !guards_1_1.done && (_a = guards_1.return)) _a.call(guards_1);
      } finally {
        if (e_1) throw e_1.error;
      }
    }
    return true;
  };
};

// dist/primitives.js
var __read = function(o, n) {
  var m = typeof Symbol === "function" && o[Symbol.iterator];
  if (!m) return o;
  var i = m.call(o), r, ar = [], e;
  try {
    while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
  } catch (error) {
    e = { error };
  } finally {
    try {
      if (r && !r.done && (m = i["return"])) m.call(i);
    } finally {
      if (e) throw e.error;
    }
  }
  return ar;
};
var __spreadArray = function(to, from, pack) {
  if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
    if (ar || !(i in from)) {
      if (!ar) ar = Array.prototype.slice.call(from, 0, i);
      ar[i] = from[i];
    }
  }
  return to.concat(ar || Array.prototype.slice.call(from));
};
var MINIMUM_ARRAY_INDEX = 0;
var isNumber = function(n) {
  return typeof n === "number" && !isNaN(n);
};
var isFiniteNumber = function(n) {
  return typeof n === "number" && !isNaN(n) && isFinite(n);
};
var isFloat = function(n) {
  return typeof n === "number";
};
var isDouble = isFloat;
var isInfinity = function(n) {
  return typeof n === "number" && !isNaN(n) && !isFinite(n);
};
var _isNaN = function(n) {
  return typeof n === "number" && isNaN(n);
};
var isElementOf = function() {
  var ss = [];
  for (var _i = 0; _i < arguments.length; _i++) {
    ss[_i] = arguments[_i];
  }
  return function(s) {
    return ss.indexOf(s) >= MINIMUM_ARRAY_INDEX;
  };
};
var isSingletonNumber = function(v) {
  return function(n) {
    return n === v;
  };
};
var isSingletonNumberUnion = function() {
  var ss = [];
  for (var _i = 0; _i < arguments.length; _i++) {
    ss[_i] = arguments[_i];
  }
  return function(s) {
    return ss.indexOf(s) >= MINIMUM_ARRAY_INDEX;
  };
};
var isString = function(s) {
  return typeof s === "string";
};
var isSingletonString = function(v) {
  return function(s) {
    return s === v;
  };
};
var isSingletonStringUnion = function() {
  var ss = [];
  for (var _i = 0; _i < arguments.length; _i++) {
    ss[_i] = arguments[_i];
  }
  return function(s) {
    return ss.indexOf(s) >= MINIMUM_ARRAY_INDEX;
  };
};
var isBoolean = function(b) {
  return typeof b === "boolean";
};
var isNull = function(o) {
  return o === null;
};
var isUndefined = function(u) {
  return typeof u === "undefined";
};
var isOptional = function(tgt) {
  return function(o) {
    return typeof o === "undefined" || tgt(o);
  };
};
var isNullable = function(tgt) {
  return function(o) {
    return o === null || tgt(o);
  };
};
var isMissing = function(tgt) {
  return function(o) {
    return o == null || tgt(o);
  };
};
var isArray = function(valueCheck) {
  return function(arr) {
    return Array.isArray(arr) && arr.reduce(function(acc, v) {
      return acc && valueCheck(v);
    }, true);
  };
};
var isNotEmptyList = function(valueCheck) {
  return function(arr) {
    return Array.isArray(arr) && arr.length >= 1 && arr.reduce(function(acc, v) {
      return acc && valueCheck(v);
    }, true);
  };
};
var narrowValue = function(ptt, ptu) {
  return combine(ptt, ptu);
};
var narrowArray = function(pt) {
  return function(ts) {
    return ts.reduce(function(acc, b) {
      return acc && pt(b);
    }, true);
  };
};
var isSetOf = function(tg) {
  return function(o) {
    return o instanceof Set && Array.of.apply(Array, __spreadArray([], __read(o.values()), false)).reduce(function(acc, v) {
      return acc && tg(v);
    }, true);
  };
};
var isObjectLike = function(obj) {
  return obj != null && typeof obj === "object";
};
var isObject = function(obj) {
  return obj != null && typeof obj === "object" && !(obj instanceof Array);
};
var isSet = function(obj) {
  return obj != null;
};
var isNumericalEnumeration = function(e, flags) {
  if (flags === void 0) {
    flags = false;
  }
  var options = Object.values(e).filter(isNumber);
  if (!flags) {
    return function(obj) {
      return options.includes(obj);
    };
  } else {
    return function(obj) {
      return typeof obj === "number" && obj !== 0 && options.filter(function(v) {
        return (v & obj) === v;
      }).reduce(function(acc, v) {
        return acc | v;
      }, 0) === obj;
    };
  }
};
var isStringEnumeration = function(e) {
  var options = Object.values(e);
  return function(obj) {
    return options.includes(obj);
  };
};
var isAny = function(_a) {
  return true;
};
var isUnknown = isAny;
var isNever = function(n) {
  throw Error("Unexpected value when expecting never: ".concat(n));
};

// dist/objects.js
var hasProperty = function(property, value) {
  return function(o) {
    return value(o[property]);
  };
};
var hasOptionalProperty = function(property, value) {
  return function(o) {
    return !(property in o) || value(o[property]);
  };
};
var isRecord = function(property, value) {
  return function(o) {
    return isObject(o) && hasProperty(property, value)(o);
  };
};
var hasStringIndexSignature = function(value, enforce) {
  if (enforce === void 0) {
    enforce = true;
  }
  return function(o) {
    var n = 0;
    for (var prop in o) {
      if (isNaN(parseInt(prop, 10))) {
        if (value(o[prop])) {
          n++;
        } else {
          return false;
        }
      }
    }
    return !enforce || n > 0;
  };
};
var hasNumericIndexSignature = function(value, enforce) {
  if (enforce === void 0) {
    enforce = true;
  }
  return function(o) {
    var n = 0;
    for (var prop in o) {
      if (!isNaN(parseInt(prop, 10))) {
        if (value(o[prop])) {
          n++;
        } else {
          return false;
        }
      }
    }
    return !enforce || n > 0;
  };
};
var isInstance = function(klass) {
  return function(o) {
    return o instanceof klass;
  };
};
var hasProperties = function(props) {
  return function(o) {
    for (var prop in props) {
      if (!hasProperty(prop, props[prop])(o)) {
        return false;
      }
    }
    return true;
  };
};
var hasOnlyProperties = function(props) {
  return function(o) {
    var found = [];
    for (var prop in o) {
      if (prop in props) {
        var propsKey = prop;
        if (!hasProperty(propsKey, props[propsKey])(o)) {
          return false;
        }
        found.push(propsKey);
      } else {
        return false;
      }
    }
    return found.length === Object.keys(props).length;
  };
};
var hasOptionalProperties = function(props) {
  return function(o) {
    for (var prop in props) {
      if (!hasOptionalProperty(prop, props[prop])(o)) {
        return false;
      }
    }
    return true;
  };
};
var isLikeObject = function(props) {
  return combine(isObject, hasProperties(props));
};
var isExactObject = function(props) {
  return combine(isObject, hasOnlyProperties(props));
};

// dist/combinators/functions.js
var isUnion = function(ptt, ptu) {
  return function(o) {
    return ptt(o) || ptu(o);
  };
};
var isIntersection = function(ptt, ptu) {
  return function(o) {
    return ptt(o) && ptu(o);
  };
};

// dist/combinators/unionof.js
var UnionOf = (
  /** @class */
  function() {
    function UnionOf2(ptt) {
      this.ptt = ptt;
    }
    UnionOf2.prototype.get = function() {
      return this.ptt;
    };
    UnionOf2.prototype.with = function(ptv) {
      return new UnionOf2(isUnion(this.ptt, ptv));
    };
    return UnionOf2;
  }()
);

// dist/combinators/intersectionof.js
var IntersectionOf = (
  /** @class */
  function() {
    function IntersectionOf2(ptt) {
      this.ptt = ptt;
    }
    IntersectionOf2.prototype.get = function() {
      return this.ptt;
    };
    IntersectionOf2.prototype.with = function(ptu) {
      return new IntersectionOf2(isIntersection(this.ptt, ptu));
    };
    return IntersectionOf2;
  }()
);

// dist/combinators/interface.js
var InterfaceStep = (
  /** @class */
  function() {
    function InterfaceStep2(ptt) {
      this.ptt = ptt;
    }
    InterfaceStep2.prototype.get = function() {
      var _this = this;
      return function(obj) {
        return isObjectLike(obj) && _this.ptt(obj);
      };
    };
    InterfaceStep2.prototype.with = function(ptv) {
      return new InterfaceStep2(isIntersection(this.ptt, ptv));
    };
    InterfaceStep2.prototype.withProperty = function(key, ptv) {
      return new InterfaceStep2(isIntersection(this.ptt, hasProperty(key, ptv)));
    };
    InterfaceStep2.prototype.withOptionalProperty = function(key, ptv) {
      return new InterfaceStep2(isIntersection(this.ptt, hasOptionalProperty(key, ptv)));
    };
    InterfaceStep2.prototype.withStringIndexSignature = function(value, enforce) {
      if (enforce === void 0) {
        enforce = true;
      }
      return new InterfaceStep2(isIntersection(this.ptt, hasStringIndexSignature(value, enforce)));
    };
    InterfaceStep2.prototype.withNumericIndexSignature = function(value, enforce) {
      if (enforce === void 0) {
        enforce = true;
      }
      return new InterfaceStep2(isIntersection(this.ptt, hasNumericIndexSignature(value, enforce)));
    };
    InterfaceStep2.prototype.withProperties = function(props) {
      return new InterfaceStep2(isIntersection(this.ptt, hasProperties(props)));
    };
    InterfaceStep2.prototype.withOptionalProperties = function(props) {
      return new InterfaceStep2(isIntersection(this.ptt, hasOptionalProperties(props)));
    };
    return InterfaceStep2;
  }()
);
var IsInterface = (
  /** @class */
  function() {
    function IsInterface2() {
    }
    IsInterface2.prototype.get = function() {
      return isObjectLike;
    };
    IsInterface2.prototype.with = function(ptv) {
      return new InterfaceStep(ptv);
    };
    IsInterface2.prototype.withProperty = function(key, ptv) {
      return new InterfaceStep(hasProperty(key, ptv));
    };
    IsInterface2.prototype.withOptionalProperty = function(key, ptv) {
      return new InterfaceStep(hasOptionalProperty(key, ptv));
    };
    IsInterface2.prototype.withStringIndexSignature = function(value, enforce) {
      if (enforce === void 0) {
        enforce = true;
      }
      return new InterfaceStep(hasStringIndexSignature(value, enforce));
    };
    IsInterface2.prototype.withNumericIndexSignature = function(value, enforce) {
      if (enforce === void 0) {
        enforce = true;
      }
      return new InterfaceStep(hasNumericIndexSignature(value, enforce));
    };
    IsInterface2.prototype.withProperties = function(props) {
      return new InterfaceStep(hasProperties(props));
    };
    IsInterface2.prototype.withOptionalProperties = function(props) {
      return new InterfaceStep(hasOptionalProperties(props));
    };
    return IsInterface2;
  }()
);
export {
  AssertionError,
  IntersectionOf,
  IsInterface,
  UnionOf,
  assert,
  combine,
  hasNumericIndexSignature,
  hasOnlyProperties,
  hasOptionalProperties,
  hasOptionalProperty,
  hasProperties,
  hasProperty,
  hasStringIndexSignature,
  isAny,
  isArray,
  isBoolean,
  isDouble,
  isElementOf,
  isExactObject,
  isFiniteNumber,
  isFloat,
  isInfinity,
  isInstance,
  isIntersection,
  isLikeObject,
  isMissing,
  _isNaN as isNaN,
  isNever,
  isNotEmptyList,
  isNull,
  isNullable,
  isNumber,
  isNumericalEnumeration,
  isObject,
  isObjectLike,
  isOptional,
  isRecord,
  isSet,
  isSetOf,
  isSingletonNumber,
  isSingletonNumberUnion,
  isSingletonString,
  isSingletonStringUnion,
  isString,
  isStringEnumeration,
  isUndefined,
  isUnion,
  isUnknown,
  narrowArray,
  narrowValue
};
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