$

node_modules/release-zalgo/lib/Thenable.js

@@ -0,0 +1,39 @@
+'use strict'
+
+const constants = require('./constants')
+const unwrapSync = require('./unwrapSync')
+
+// Behaves like a Promise, though the then() and catch() methods are unbound and
+// must be called with the instance as their thisArg.
+//
+// The executor must either return a value or throw a rejection reason. It is
+// not provided resolver or rejecter methods. The executor may return another
+// thenable.
+class Thenable {
+  constructor (executor) {
+    try {
+      this.result = unwrapSync(executor())
+      this.state = constants.RESOLVED
+    } catch (err) {
+      this.result = err
+      this.state = constants.REJECTED
+    }
+  }
+
+  then (onFulfilled, onRejected) {
+    if (this.state === constants.RESOLVED && typeof onFulfilled === 'function') {
+      return new Thenable(() => onFulfilled(this.result))
+    }
+
+    if (this.state === constants.REJECTED && typeof onRejected === 'function') {
+      return new Thenable(() => onRejected(this.result))
+    }
+
+    return this
+  }
+
+  catch (onRejected) {
+    return this.then(null, onRejected)
+  }
+}
+module.exports = Thenable