Update sanctuary-type-identifiers to version 3

package.json

@@ -61,7 +61,7 @@
   ],
   "dependencies": {
     "sanctuary-show": "^2.0.0",
-    "sanctuary-type-identifiers": "^2.0.0"
+    "sanctuary-type-identifiers": "^3.0.0"
   },
   "devDependencies": {
     "c8": "^7.0.0",

src/future.js

@@ -59,7 +59,13 @@ export function isFuture(x){
   return x instanceof Future || type(x) === $$type;
 }
 
+// Compliance to sanctuary-type-identifiers version 1 and 2.
+// In order to prevent sanctuary-type-identifiers version 3 from identifying
+// Future as a type of $$type, we ensure that Future.constructor.prototype is
+// equal to Future.
 Future['@@type'] = $$type;
+Future.constructor = {prototype: Future};
+
 Future[FL.of] = resolve;
 Future[FL.chainRec] = chainRec;
 

src/par.js

@@ -23,7 +23,12 @@ export function Par (sequential){
 var $$type = namespace + '/ConcurrentFuture@' + version;
 var zeroInstance = new ConcurrentFuture(never);
 
+// Compliance to sanctuary-type-identifiers version 1 and 2.
+// In order to prevent sanctuary-type-identifiers version 3 from identifying
+// Par as a type of $$type, we ensure that Par.constructor.prototype is
+// equal to Par.
 Par['@@type'] = $$type;
+Par.constructor = {prototype: Par};
 
 Par[FL.of] = function Par$of(x){
   return new ConcurrentFuture(resolve(x));

test/arbitraries.js

@@ -61,6 +61,8 @@ export const {
     jsv.bool,
     jsv.falsy,
     jsv.constant(new Error('Kapot')),
+    jsv.constant(Future),
+    jsv.constant(Par),
     tie('anyFunction')
   ),
   any: jsv.oneof(

test/assertions.js

@@ -1,6 +1,7 @@
 import show from 'sanctuary-show';
 import type from 'sanctuary-type-identifiers';
-import {Future, isFuture} from '../index.js';
+import {isFuture} from '../index.js';
+import {$$type} from '../src/internal/const.js';
 import {strictEqual, deepStrictEqual} from 'assert';
 
 const states = ['pending', 'crashed', 'rejected', 'resolved'];
@@ -13,7 +14,7 @@ export const equality = a => b => {
 
 export const future = x => {
   equality(isFuture(x))(true);
-  equality(type(x))(Future['@@type']);
+  equality(type(x))($$type);
   return true;
 };
 

test/unit/0.error.js

@@ -52,7 +52,7 @@ test('invalidArity constructs a TypeError', function (){
 });
 
 var mockType = function (identifier){
-  return {'constructor': {'@@type': identifier}, '@@show': function (){
+  return {'@@type': identifier, '@@show': function (){
     return 'mockType("' + identifier + '")';
   }};
 };