Bump to v3.0.0.

internal/isBindable.js

@@ -0,0 +1,38 @@
+import baseSetData from './baseSetData';
+import isNative from '../lang/isNative';
+import support from '../support';
+
+/** Used to detect named functions. */
+var reFuncName = /^\s*function[ \n\r\t]+\w/;
+
+/** Used to detect functions containing a `this` reference. */
+var reThis = /\bthis\b/;
+
+/** Used to resolve the decompiled source of functions. */
+var fnToString = Function.prototype.toString;
+
+/**
+ * Checks if `func` is eligible for `this` binding.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is eligible, else `false`.
+ */
+function isBindable(func) {
+  var result = !(support.funcNames ? func.name : support.funcDecomp);
+
+  if (!result) {
+    var source = fnToString.call(func);
+    if (!support.funcNames) {
+      result = !reFuncName.test(source);
+    }
+    if (!result) {
+      // Check if `func` references the `this` keyword and store the result.
+      result = reThis.test(source) || isNative(func);
+      baseSetData(func, result);
+    }
+  }
+  return result;
+}
+
+export default isBindable;