superstruct - npm Package Compare versions

Comparing version 0.12.0 to 0.12.1

lib/index.es.js

@@ -1,86 +0,1 @@
-function _defineProperty(obj, key, value) {
-  if (key in obj) {
-    Object.defineProperty(obj, key, {
-      value: value,
-      enumerable: true,
-      configurable: true,
-      writable: true
-    });
-  } else {
-    obj[key] = value;
-  }
-
-  return obj;
-}
-
-function ownKeys(object, enumerableOnly) {
-  var keys = Object.keys(object);
-
-  if (Object.getOwnPropertySymbols) {
-    var symbols = Object.getOwnPropertySymbols(object);
-    if (enumerableOnly) symbols = symbols.filter(function (sym) {
-      return Object.getOwnPropertyDescriptor(object, sym).enumerable;
-    });
-    keys.push.apply(keys, symbols);
-  }
-
-  return keys;
-}
-
-function _objectSpread2(target) {
-  for (var i = 1; i < arguments.length; i++) {
-    var source = arguments[i] != null ? arguments[i] : {};
-
-    if (i % 2) {
-      ownKeys(Object(source), true).forEach(function (key) {
-        _defineProperty(target, key, source[key]);
-      });
-    } else if (Object.getOwnPropertyDescriptors) {
-      Object.defineProperties(target, Object.getOwnPropertyDescriptors(source));
-    } else {
-      ownKeys(Object(source)).forEach(function (key) {
-        Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));
-      });
-    }
-  }
-
-  return target;
-}
-
-function _objectWithoutPropertiesLoose(source, excluded) {
-  if (source == null) return {};
-  var target = {};
-  var sourceKeys = Object.keys(source);
-  var key, i;
-
-  for (i = 0; i < sourceKeys.length; i++) {
-    key = sourceKeys[i];
-    if (excluded.indexOf(key) >= 0) continue;
-    target[key] = source[key];
-  }
-
-  return target;
-}
-
-function _objectWithoutProperties(source, excluded) {
-  if (source == null) return {};
-
-  var target = _objectWithoutPropertiesLoose(source, excluded);
-
-  var key, i;
-
-  if (Object.getOwnPropertySymbols) {
-    var sourceSymbolKeys = Object.getOwnPropertySymbols(source);
-
-    for (i = 0; i < sourceSymbolKeys.length; i++) {
-      key = sourceSymbolKeys[i];
-      if (excluded.indexOf(key) >= 0) continue;
-      if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue;
-      target[key] = source[key];
-    }
-  }
-
-  return target;
-}
-
 /**
@@ -101,23 +16,13 @@ * A `StructFailure` represents a single specific failure in validation.
     const {
-      path,
-      value,
-      key,
-      type,
       message,
-      refinement,
-      branch
-    } = failure,
-          rest = _objectWithoutProperties(failure, ["path", "value", "key", "type", "message", "refinement", "branch"]);
-
+      ...rest
+    } = failure;
+    const {
+      path
+    } = failure;
     let failures;
-    const msg = path.length === 0 ? message : `At path: ${path.join('.')} -- ${message}`;
+    const msg = path.length === 0 ? message : "At path: " + path.join('.') + " -- " + message;
     super(msg);
     Object.assign(this, rest);
     this.name = this.constructor.name;
-    this.value = value;
-    this.key = key;
-    this.type = type;
-    this.refinement = refinement;
-    this.path = path;
-    this.branch = branch;
 
@@ -150,5 +55,4 @@ this.failures = () => {
 
-function print(value, ticks) {
-  const string = typeof value === 'string' ? JSON.stringify(value) : `${value}`;
-  return ticks ? `${ticks}${string}${ticks}` : string;
+function print(value) {
+  return typeof value === 'string' ? JSON.stringify(value) : "" + value;
 }
@@ -244,5 +148,5 @@ /**
   } = struct;
+  const subschema = { ...schema
+  };
 
-  const subschema = _objectSpread2({}, schema);
-
   for (const key of keys) {
@@ -262,3 +166,5 @@ delete subschema[key];
 function partial(struct) {
-  const schema = struct instanceof Struct ? _objectSpread2({}, struct.schema) : _objectSpread2({}, struct);
+  const schema = struct instanceof Struct ? { ...struct.schema
+  } : { ...struct
+  };
 
@@ -318,3 +224,3 @@ for (const key in schema) {
       if (!Array.isArray(value)) {
-        yield ctx.fail(`Expected an array value, but received: ${print(value)}`);
+        yield ctx.fail("Expected an array value, but received: " + print(value));
       } else if (Element) {
@@ -347,3 +253,3 @@ for (const [i, v] of value.entries()) {
   return define('date', value => {
-    return value instanceof Date && !isNaN(value.getTime()) || `Expected a valid \`Date\` object, but received: ${print(value)}`;
+    return value instanceof Date && !isNaN(value.getTime()) || "Expected a valid `Date` object, but received: " + print(value);
   });
@@ -363,3 +269,3 @@ }
     validator: value => {
-      return values.includes(value) || `Expected one of \`${description}\`, but received: ${print(value)}`;
+      return values.includes(value) || "Expected one of `" + description + "`, but received: " + print(value);
     }
@@ -374,3 +280,3 @@ });
   return define('func', value => {
-    return typeof value === 'function' || `Expected a function, but received: ${print(value)}`;
+    return typeof value === 'function' || "Expected a function, but received: " + print(value);
   });
@@ -384,3 +290,3 @@ }
   return define('instance', value => {
-    return value instanceof Class || `Expected a \`${Class.name}\` instance, but received: ${print(value)}`;
+    return value instanceof Class || "Expected a `" + Class.name + "` instance, but received: " + print(value);
   });
@@ -394,3 +300,3 @@ }
   return define('integer', value => {
-    return typeof value === 'number' && !isNaN(value) && Number.isInteger(value) || `Expected an integer, but received: ${print(value)}`;
+    return typeof value === 'number' && !isNaN(value) && Number.isInteger(value) || "Expected an integer, but received: " + print(value);
   });
@@ -408,3 +314,3 @@ }
   return define('literal', value => {
-    return value === constant || `Expected the literal \`${description}\`, but received: ${print(value)}`;
+    return value === constant || "Expected the literal `" + description + "`, but received: " + print(value);
   });
@@ -415,3 +321,3 @@ }
     if (!(value instanceof Map)) {
-      yield ctx.fail(`Expected a \`Map\` object, but received: ${print(value)}`);
+      yield ctx.fail("Expected a `Map` object, but received: " + print(value));
     } else if (Key && Value) {
@@ -440,3 +346,3 @@ for (const [k, v] of value.entries()) {
   } = struct;
-  return new Struct(_objectSpread2(_objectSpread2({}, struct), {}, {
+  return new Struct({ ...struct,
     validator: (value, ctx) => {
@@ -447,10 +353,9 @@ return value === null || ctx.check(value, struct);
       if (value != null) {
-        const c = _objectSpread2(_objectSpread2({}, ctx), {}, {
+        const c = { ...ctx,
           struct
-        });
-
+        };
         yield* toFailures(refiner(value, c), c);
       }
     }
-  }));
+  });
 }
@@ -463,3 +368,3 @@ /**
   return define('number', value => {
-    return typeof value === 'number' && !isNaN(value) || `Expected a number, but received: ${print(value)}`;
+    return typeof value === 'number' && !isNaN(value) || "Expected a number, but received: " + print(value);
   });
@@ -476,3 +381,3 @@ }
       if (typeof value !== 'object' || value == null) {
-        yield ctx.fail(`Expected an object, but received: ${print(value)}`);
+        yield ctx.fail("Expected an object, but received: " + print(value));
       } else if (schema) {
@@ -526,3 +431,3 @@ const unknowns = new Set(Object.keys(value));
   } = struct;
-  return new Struct(_objectSpread2(_objectSpread2({}, struct), {}, {
+  return new Struct({ ...struct,
     validator: (value, ctx) => {
@@ -533,10 +438,9 @@ return value === undefined || ctx.check(value, struct);
       if (value != null) {
-        const c = _objectSpread2(_objectSpread2({}, ctx), {}, {
+        const c = { ...ctx,
           struct
-        });
-
+        };
         yield* toFailures(refiner(value, c), c);
       }
     }
-  }));
+  });
 }
@@ -553,3 +457,3 @@ /**
     if (typeof value !== 'object' || value == null) {
-      yield ctx.fail(`Expected an object, but received: ${print(value)}`);
+      yield ctx.fail("Expected an object, but received: " + print(value));
     } else {
@@ -579,3 +483,3 @@ for (const k in value) {
     if (!(value instanceof Set)) {
-      yield ctx.fail(`Expected a \`Set\` object, but received: ${print(value)}`);
+      yield ctx.fail("Expected a `Set` object, but received: " + print(value));
     } else if (Element) {
@@ -594,3 +498,3 @@ for (const val of value) {
   return define('string', value => {
-    return typeof value === 'string' || `Expected a string, but received: ${print(value)}`;
+    return typeof value === 'string' || "Expected a string, but received: " + print(value);
   });
@@ -602,3 +506,3 @@ }
     if (!Array.isArray(value)) {
-      yield ctx.fail(`Expected an array, but received: ${print(value)}`);
+      yield ctx.fail("Expected an array, but received: " + print(value));
     } else {
@@ -632,3 +536,3 @@ for (const [index, Element] of Elements.entries()) {
       if (typeof value !== 'object' || value == null) {
-        yield ctx.fail(`Expected an object, but received: ${print(value)}`);
+        yield ctx.fail("Expected an object, but received: " + print(value));
       } else {
@@ -659,3 +563,3 @@ for (const key of keys) {
 
-    yield ctx.fail(`Expected the value to satisfy a union of \`${description}\`, but received: ${print(value)}`);
+    yield ctx.fail("Expected the value to satisfy a union of `" + description + "`, but received: " + print(value));
     yield* failures;
@@ -685,3 +589,3 @@ });
   const fn = struct.coercer;
-  return new Struct(_objectSpread2(_objectSpread2({}, struct), {}, {
+  return new Struct({ ...struct,
     coercer: value => {
@@ -694,3 +598,3 @@ if (is(value, condition)) {
     }
-  }));
+  });
 }
@@ -716,4 +620,4 @@ /**
     if (!strict && isPlainObject(x) && isPlainObject(f)) {
-      const ret = _objectSpread2({}, x);
-
+      const ret = { ...x
+      };
       let changed = false;
@@ -779,14 +683,10 @@
   constructor(props) {
-    const {
-      type,
-      schema,
-      coercer = value => value,
-      validator = () => [],
-      refiner = () => []
-    } = props;
-    this.type = type;
-    this.schema = schema;
-    this.coercer = coercer;
-    this.validator = validator;
-    this.refiner = refiner;
+    this.type = props.type;
+    this.schema = props.schema;
+
+    this.coercer = props.coercer || (value => value);
+
+    this.validator = props.validator || (() => []);
+
+    this.refiner = props.refiner || (() => []);
   }
@@ -930,6 +830,6 @@ /**
       if (!message) {
-        message = `Expected a value of type \`${type}\`${refinement ? ` with refinement \`${refinement}\`` : ''}${path.length ? ` for \`${path.join('.')}\`` : ''}, but received: \`${print(value)}\``;
+        message = "Expected a value of type `" + type + "`" + (refinement ? " with refinement `" + refinement + "`" : '') + (path.length ? " for `" + path.join('.') + "`" : '') + ", but received: `" + print(value) + "`";
       }
 
-      return _objectSpread2(_objectSpread2({}, props), {}, {
+      return { ...props,
         value,
@@ -942,3 +842,3 @@ type,
         branch: [...branch, value]
-      });
+      };
     }
@@ -963,3 +863,3 @@
 function empty(struct) {
-  const expected = `Expected an empty ${struct.type}`;
+  const expected = "Expected an empty " + struct.type;
   return refine(struct, 'empty', value => {
@@ -970,3 +870,3 @@ if (value instanceof Map || value instanceof Set) {
       } = value;
-      return size === 0 || `${expected} but received one with a size of \`${size}\``;
+      return size === 0 || expected + " but received one with a size of `" + size + "`";
     } else {
@@ -976,3 +876,3 @@ const {
       } = value;
-      return length === 0 || `${expected} but received one with a length of \`${length}\``;
+      return length === 0 || expected + " but received one with a length of `" + length + "`";
     }
@@ -990,3 +890,3 @@ });
   return refine(struct, 'max', value => {
-    return exclusive ? value < threshold : value <= threshold || `Expected a ${struct.type} greater than ${exclusive ? '' : 'or equal to '}${threshold} but received \`${value}\``;
+    return exclusive ? value < threshold : value <= threshold || "Expected a " + struct.type + " greater than " + (exclusive ? '' : 'or equal to ') + threshold + " but received `" + value + "`";
   });
@@ -1003,3 +903,3 @@ }
   return refine(struct, 'min', value => {
-    return exclusive ? value > threshold : value >= threshold || `Expected a ${struct.type} greater than ${exclusive ? '' : 'or equal to '}${threshold} but received \`${value}\``;
+    return exclusive ? value > threshold : value >= threshold || "Expected a " + struct.type + " greater than " + (exclusive ? '' : 'or equal to ') + threshold + " but received `" + value + "`";
   });
@@ -1013,3 +913,3 @@ }
   return refine(struct, 'pattern', value => {
-    return regexp.test(value) || `Expected a ${struct.type} matching \`/${regexp.source}/\` but received "${value}"`;
+    return regexp.test(value) || "Expected a " + struct.type + " matching `/" + regexp.source + "/` but received \"" + value + "\"";
   });
@@ -1022,7 +922,7 @@ }
 function size(struct, min, max = min) {
-  const expected = `Expected a ${struct.type}`;
-  const of = min === max ? `of \`${min}\`` : `between \`${min}\` and \`${max}\``;
+  const expected = "Expected a " + struct.type;
+  const of = min === max ? "of `" + min + "`" : "between `" + min + "` and `" + max + "`";
   return refine(struct, 'size', value => {
     if (typeof value === 'number' || value instanceof Date) {
-      return min <= value && value <= max || `${expected} ${of} but received \`${value}\``;
+      return min <= value && value <= max || expected + " " + of + " but received `" + value + "`";
     } else if (value instanceof Map || value instanceof Set) {
@@ -1032,3 +932,3 @@ const {
       } = value;
-      return min <= size && size <= max || `${expected} with a size ${of} but received one with a size of \`${size}\``;
+      return min <= size && size <= max || expected + " with a size " + of + " but received one with a size of `" + size + "`";
     } else {
@@ -1038,3 +938,3 @@ const {
       } = value;
-      return min <= length && length <= max || `${expected} with a length ${of} but received one with a length of \`${length}\``;
+      return min <= length && length <= max || expected + " with a length " + of + " but received one with a length of `" + length + "`";
     }
@@ -1053,3 +953,4 @@ });
   const fn = struct.refiner;
-  return new Struct(_objectSpread2(_objectSpread2({}, struct), {}, {
+  return new Struct({ ...struct,
+
     *refiner(value, ctx) {
@@ -1059,9 +960,9 @@ yield* toFailures(fn(value, ctx), ctx);
       for (const failure of toFailures(refiner(value, ctx), ctx)) {
-        yield _objectSpread2(_objectSpread2({}, failure), {}, {
+        yield { ...failure,
           refinement: name
-        });
+        };
       }
     }
 
-  }));
+  });
 }
@@ -1068,0 +969,0 @@

lib/utils.d.ts

@@ -12,3 +12,3 @@ import { Struct, Infer, Result, Context, Describe } from './struct';
  */
-export declare function print(value: any, ticks?: string): string;
+export declare function print(value: any): string;
 /**
@@ -15,0 +15,0 @@ * Shifts (removes and returns) the first value from the `input` iterator.

package.json

@@ -5,3 +5,3 @@ {
   "description": "A simple and composable way to validate data in JavaScript (and TypeScript).",
-  "version": "0.12.0",
+  "version": "0.12.1",
   "license": "MIT",
@@ -21,5 +21,3 @@ "repository": "git://github.com/ianstormtaylor/superstruct.git",
     "@babel/core": "^7.6.3",
-    "@babel/plugin-proposal-class-properties": "^7.5.5",
-    "@babel/plugin-proposal-object-rest-spread": "^7.6.2",
-    "@babel/plugin-transform-modules-commonjs": "^7.6.0",
+    "@babel/plugin-transform-modules-commonjs": "^7.12.1",
     "@babel/preset-env": "^7.6.3",
@@ -34,3 +32,2 @@ "@babel/preset-typescript": "^7.6.0",
     "babel-eslint": "^10.0.3",
-    "babel-plugin-dev-expression": "^0.2.2",
     "eslint": "^7.14.0",
@@ -37,0 +34,0 @@ "eslint-config-prettier": "^6.15.0",

umd/superstruct.js

@@ -7,87 +7,2 @@ (function (global, factory) {
 
-  function _defineProperty(obj, key, value) {
-    if (key in obj) {
-      Object.defineProperty(obj, key, {
-        value: value,
-        enumerable: true,
-        configurable: true,
-        writable: true
-      });
-    } else {
-      obj[key] = value;
-    }
-
-    return obj;
-  }
-
-  function ownKeys(object, enumerableOnly) {
-    var keys = Object.keys(object);
-
-    if (Object.getOwnPropertySymbols) {
-      var symbols = Object.getOwnPropertySymbols(object);
-      if (enumerableOnly) symbols = symbols.filter(function (sym) {
-        return Object.getOwnPropertyDescriptor(object, sym).enumerable;
-      });
-      keys.push.apply(keys, symbols);
-    }
-
-    return keys;
-  }
-
-  function _objectSpread2(target) {
-    for (var i = 1; i < arguments.length; i++) {
-      var source = arguments[i] != null ? arguments[i] : {};
-
-      if (i % 2) {
-        ownKeys(Object(source), true).forEach(function (key) {
-          _defineProperty(target, key, source[key]);
-        });
-      } else if (Object.getOwnPropertyDescriptors) {
-        Object.defineProperties(target, Object.getOwnPropertyDescriptors(source));
-      } else {
-        ownKeys(Object(source)).forEach(function (key) {
-          Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));
-        });
-      }
-    }
-
-    return target;
-  }
-
-  function _objectWithoutPropertiesLoose(source, excluded) {
-    if (source == null) return {};
-    var target = {};
-    var sourceKeys = Object.keys(source);
-    var key, i;
-
-    for (i = 0; i < sourceKeys.length; i++) {
-      key = sourceKeys[i];
-      if (excluded.indexOf(key) >= 0) continue;
-      target[key] = source[key];
-    }
-
-    return target;
-  }
-
-  function _objectWithoutProperties(source, excluded) {
-    if (source == null) return {};
-
-    var target = _objectWithoutPropertiesLoose(source, excluded);
-
-    var key, i;
-
-    if (Object.getOwnPropertySymbols) {
-      var sourceSymbolKeys = Object.getOwnPropertySymbols(source);
-
-      for (i = 0; i < sourceSymbolKeys.length; i++) {
-        key = sourceSymbolKeys[i];
-        if (excluded.indexOf(key) >= 0) continue;
-        if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue;
-        target[key] = source[key];
-      }
-    }
-
-    return target;
-  }
-
   /**
@@ -108,23 +23,13 @@ * A `StructFailure` represents a single specific failure in validation.
       const {
-        path,
-        value,
-        key,
-        type,
         message,
-        refinement,
-        branch
-      } = failure,
-            rest = _objectWithoutProperties(failure, ["path", "value", "key", "type", "message", "refinement", "branch"]);
-
+        ...rest
+      } = failure;
+      const {
+        path
+      } = failure;
       let failures;
-      const msg = path.length === 0 ? message : `At path: ${path.join('.')} -- ${message}`;
+      const msg = path.length === 0 ? message : "At path: " + path.join('.') + " -- " + message;
       super(msg);
       Object.assign(this, rest);
       this.name = this.constructor.name;
-      this.value = value;
-      this.key = key;
-      this.type = type;
-      this.refinement = refinement;
-      this.path = path;
-      this.branch = branch;
 
@@ -157,5 +62,4 @@ this.failures = () => {
 
-  function print(value, ticks) {
-    const string = typeof value === 'string' ? JSON.stringify(value) : `${value}`;
-    return ticks ? `${ticks}${string}${ticks}` : string;
+  function print(value) {
+    return typeof value === 'string' ? JSON.stringify(value) : "" + value;
   }
@@ -251,5 +155,5 @@ /**
     } = struct;
+    const subschema = { ...schema
+    };
 
-    const subschema = _objectSpread2({}, schema);
-
     for (const key of keys) {
@@ -269,3 +173,5 @@ delete subschema[key];
   function partial(struct) {
-    const schema = struct instanceof Struct ? _objectSpread2({}, struct.schema) : _objectSpread2({}, struct);
+    const schema = struct instanceof Struct ? { ...struct.schema
+    } : { ...struct
+    };
 
@@ -325,3 +231,3 @@ for (const key in schema) {
         if (!Array.isArray(value)) {
-          yield ctx.fail(`Expected an array value, but received: ${print(value)}`);
+          yield ctx.fail("Expected an array value, but received: " + print(value));
         } else if (Element) {
@@ -354,3 +260,3 @@ for (const [i, v] of value.entries()) {
     return define('date', value => {
-      return value instanceof Date && !isNaN(value.getTime()) || `Expected a valid \`Date\` object, but received: ${print(value)}`;
+      return value instanceof Date && !isNaN(value.getTime()) || "Expected a valid `Date` object, but received: " + print(value);
     });
@@ -370,3 +276,3 @@ }
       validator: value => {
-        return values.includes(value) || `Expected one of \`${description}\`, but received: ${print(value)}`;
+        return values.includes(value) || "Expected one of `" + description + "`, but received: " + print(value);
       }
@@ -381,3 +287,3 @@ });
     return define('func', value => {
-      return typeof value === 'function' || `Expected a function, but received: ${print(value)}`;
+      return typeof value === 'function' || "Expected a function, but received: " + print(value);
     });
@@ -391,3 +297,3 @@ }
     return define('instance', value => {
-      return value instanceof Class || `Expected a \`${Class.name}\` instance, but received: ${print(value)}`;
+      return value instanceof Class || "Expected a `" + Class.name + "` instance, but received: " + print(value);
     });
@@ -401,3 +307,3 @@ }
     return define('integer', value => {
-      return typeof value === 'number' && !isNaN(value) && Number.isInteger(value) || `Expected an integer, but received: ${print(value)}`;
+      return typeof value === 'number' && !isNaN(value) && Number.isInteger(value) || "Expected an integer, but received: " + print(value);
     });
@@ -415,3 +321,3 @@ }
     return define('literal', value => {
-      return value === constant || `Expected the literal \`${description}\`, but received: ${print(value)}`;
+      return value === constant || "Expected the literal `" + description + "`, but received: " + print(value);
     });
@@ -422,3 +328,3 @@ }
       if (!(value instanceof Map)) {
-        yield ctx.fail(`Expected a \`Map\` object, but received: ${print(value)}`);
+        yield ctx.fail("Expected a `Map` object, but received: " + print(value));
       } else if (Key && Value) {
@@ -447,3 +353,3 @@ for (const [k, v] of value.entries()) {
     } = struct;
-    return new Struct(_objectSpread2(_objectSpread2({}, struct), {}, {
+    return new Struct({ ...struct,
       validator: (value, ctx) => {
@@ -454,10 +360,9 @@ return value === null || ctx.check(value, struct);
         if (value != null) {
-          const c = _objectSpread2(_objectSpread2({}, ctx), {}, {
+          const c = { ...ctx,
             struct
-          });
-
+          };
           yield* toFailures(refiner(value, c), c);
         }
       }
-    }));
+    });
   }
@@ -470,3 +375,3 @@ /**
     return define('number', value => {
-      return typeof value === 'number' && !isNaN(value) || `Expected a number, but received: ${print(value)}`;
+      return typeof value === 'number' && !isNaN(value) || "Expected a number, but received: " + print(value);
     });
@@ -483,3 +388,3 @@ }
         if (typeof value !== 'object' || value == null) {
-          yield ctx.fail(`Expected an object, but received: ${print(value)}`);
+          yield ctx.fail("Expected an object, but received: " + print(value));
         } else if (schema) {
@@ -533,3 +438,3 @@ const unknowns = new Set(Object.keys(value));
     } = struct;
-    return new Struct(_objectSpread2(_objectSpread2({}, struct), {}, {
+    return new Struct({ ...struct,
       validator: (value, ctx) => {
@@ -540,10 +445,9 @@ return value === undefined || ctx.check(value, struct);
         if (value != null) {
-          const c = _objectSpread2(_objectSpread2({}, ctx), {}, {
+          const c = { ...ctx,
             struct
-          });
-
+          };
           yield* toFailures(refiner(value, c), c);
         }
       }
-    }));
+    });
   }
@@ -560,3 +464,3 @@ /**
       if (typeof value !== 'object' || value == null) {
-        yield ctx.fail(`Expected an object, but received: ${print(value)}`);
+        yield ctx.fail("Expected an object, but received: " + print(value));
       } else {
@@ -586,3 +490,3 @@ for (const k in value) {
       if (!(value instanceof Set)) {
-        yield ctx.fail(`Expected a \`Set\` object, but received: ${print(value)}`);
+        yield ctx.fail("Expected a `Set` object, but received: " + print(value));
       } else if (Element) {
@@ -601,3 +505,3 @@ for (const val of value) {
     return define('string', value => {
-      return typeof value === 'string' || `Expected a string, but received: ${print(value)}`;
+      return typeof value === 'string' || "Expected a string, but received: " + print(value);
     });
@@ -609,3 +513,3 @@ }
       if (!Array.isArray(value)) {
-        yield ctx.fail(`Expected an array, but received: ${print(value)}`);
+        yield ctx.fail("Expected an array, but received: " + print(value));
       } else {
@@ -639,3 +543,3 @@ for (const [index, Element] of Elements.entries()) {
         if (typeof value !== 'object' || value == null) {
-          yield ctx.fail(`Expected an object, but received: ${print(value)}`);
+          yield ctx.fail("Expected an object, but received: " + print(value));
         } else {
@@ -666,3 +570,3 @@ for (const key of keys) {
 
-      yield ctx.fail(`Expected the value to satisfy a union of \`${description}\`, but received: ${print(value)}`);
+      yield ctx.fail("Expected the value to satisfy a union of `" + description + "`, but received: " + print(value));
       yield* failures;
@@ -692,3 +596,3 @@ });
     const fn = struct.coercer;
-    return new Struct(_objectSpread2(_objectSpread2({}, struct), {}, {
+    return new Struct({ ...struct,
       coercer: value => {
@@ -701,3 +605,3 @@ if (is(value, condition)) {
       }
-    }));
+    });
   }
@@ -723,4 +627,4 @@ /**
       if (!strict && isPlainObject(x) && isPlainObject(f)) {
-        const ret = _objectSpread2({}, x);
-
+        const ret = { ...x
+        };
         let changed = false;
@@ -786,14 +690,10 @@
     constructor(props) {
-      const {
-        type,
-        schema,
-        coercer = value => value,
-        validator = () => [],
-        refiner = () => []
-      } = props;
-      this.type = type;
-      this.schema = schema;
-      this.coercer = coercer;
-      this.validator = validator;
-      this.refiner = refiner;
+      this.type = props.type;
+      this.schema = props.schema;
+
+      this.coercer = props.coercer || (value => value);
+
+      this.validator = props.validator || (() => []);
+
+      this.refiner = props.refiner || (() => []);
     }
@@ -937,6 +837,6 @@ /**
         if (!message) {
-          message = `Expected a value of type \`${type}\`${refinement ? ` with refinement \`${refinement}\`` : ''}${path.length ? ` for \`${path.join('.')}\`` : ''}, but received: \`${print(value)}\``;
+          message = "Expected a value of type `" + type + "`" + (refinement ? " with refinement `" + refinement + "`" : '') + (path.length ? " for `" + path.join('.') + "`" : '') + ", but received: `" + print(value) + "`";
         }
 
-        return _objectSpread2(_objectSpread2({}, props), {}, {
+        return { ...props,
           value,
@@ -949,3 +849,3 @@ type,
           branch: [...branch, value]
-        });
+        };
       }
@@ -970,3 +870,3 @@
   function empty(struct) {
-    const expected = `Expected an empty ${struct.type}`;
+    const expected = "Expected an empty " + struct.type;
     return refine(struct, 'empty', value => {
@@ -977,3 +877,3 @@ if (value instanceof Map || value instanceof Set) {
         } = value;
-        return size === 0 || `${expected} but received one with a size of \`${size}\``;
+        return size === 0 || expected + " but received one with a size of `" + size + "`";
       } else {
@@ -983,3 +883,3 @@ const {
         } = value;
-        return length === 0 || `${expected} but received one with a length of \`${length}\``;
+        return length === 0 || expected + " but received one with a length of `" + length + "`";
       }
@@ -997,3 +897,3 @@ });
     return refine(struct, 'max', value => {
-      return exclusive ? value < threshold : value <= threshold || `Expected a ${struct.type} greater than ${exclusive ? '' : 'or equal to '}${threshold} but received \`${value}\``;
+      return exclusive ? value < threshold : value <= threshold || "Expected a " + struct.type + " greater than " + (exclusive ? '' : 'or equal to ') + threshold + " but received `" + value + "`";
     });
@@ -1010,3 +910,3 @@ }
     return refine(struct, 'min', value => {
-      return exclusive ? value > threshold : value >= threshold || `Expected a ${struct.type} greater than ${exclusive ? '' : 'or equal to '}${threshold} but received \`${value}\``;
+      return exclusive ? value > threshold : value >= threshold || "Expected a " + struct.type + " greater than " + (exclusive ? '' : 'or equal to ') + threshold + " but received `" + value + "`";
     });
@@ -1020,3 +920,3 @@ }
     return refine(struct, 'pattern', value => {
-      return regexp.test(value) || `Expected a ${struct.type} matching \`/${regexp.source}/\` but received "${value}"`;
+      return regexp.test(value) || "Expected a " + struct.type + " matching `/" + regexp.source + "/` but received \"" + value + "\"";
     });
@@ -1029,7 +929,7 @@ }
   function size(struct, min, max = min) {
-    const expected = `Expected a ${struct.type}`;
-    const of = min === max ? `of \`${min}\`` : `between \`${min}\` and \`${max}\``;
+    const expected = "Expected a " + struct.type;
+    const of = min === max ? "of `" + min + "`" : "between `" + min + "` and `" + max + "`";
     return refine(struct, 'size', value => {
       if (typeof value === 'number' || value instanceof Date) {
-        return min <= value && value <= max || `${expected} ${of} but received \`${value}\``;
+        return min <= value && value <= max || expected + " " + of + " but received `" + value + "`";
       } else if (value instanceof Map || value instanceof Set) {
@@ -1039,3 +939,3 @@ const {
         } = value;
-        return min <= size && size <= max || `${expected} with a size ${of} but received one with a size of \`${size}\``;
+        return min <= size && size <= max || expected + " with a size " + of + " but received one with a size of `" + size + "`";
       } else {
@@ -1045,3 +945,3 @@ const {
         } = value;
-        return min <= length && length <= max || `${expected} with a length ${of} but received one with a length of \`${length}\``;
+        return min <= length && length <= max || expected + " with a length " + of + " but received one with a length of `" + length + "`";
       }
@@ -1060,3 +960,4 @@ });
     const fn = struct.refiner;
-    return new Struct(_objectSpread2(_objectSpread2({}, struct), {}, {
+    return new Struct({ ...struct,
+
       *refiner(value, ctx) {
@@ -1066,9 +967,9 @@ yield* toFailures(fn(value, ctx), ctx);
         for (const failure of toFailures(refiner(value, ctx), ctx)) {
-          yield _objectSpread2(_objectSpread2({}, failure), {}, {
+          yield { ...failure,
             refinement: name
-          });
+          };
         }
       }
 
-    }));
+    });
   }
@@ -1075,0 +976,0 @@

umd/superstruct.min.js

@@ -1,1 +0,1 @@
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