1 files changed, 20 insertions, 0 deletions
diff --git a/node_modules/es-abstract/2019/SymbolDescriptiveString.js b/node_modules/es-abstract/2019/SymbolDescriptiveString.js
new file mode 100644
index 000000000..7bd8191ad
--- /dev/null
+++ b/node_modules/es-abstract/2019/SymbolDescriptiveString.js
@@ -0,0 +1,20 @@
+'use strict';
+
+var GetIntrinsic = require('../GetIntrinsic');
+
+var $TypeError = GetIntrinsic('%TypeError%');
+
+var callBound = require('../helpers/callBound');
+
+var $SymbolToString = callBound('Symbol.prototype.toString', true);
+
+var Type = require('./Type');
+
+// https://www.ecma-international.org/ecma-262/6.0/#sec-symboldescriptivestring
+
+module.exports = function SymbolDescriptiveString(sym) {
+	if (Type(sym) !== 'Symbol') {
+		throw new $TypeError('Assertion failed: `sym` must be a Symbol');
+	}
+	return $SymbolToString(sym);
+};