project bootstrap

node_modules/es-iterator-helpers/aos/GeneratorStart.js

@@ -0,0 +1,46 @@
+'use strict';
+
+var GetIntrinsic = require('get-intrinsic');
+
+var $TypeError = GetIntrinsic('%TypeError%');
+
+var CreateIterResultObject = require('es-abstract/2023/CreateIterResultObject');
+var IsCallable = require('es-abstract/2023/IsCallable');
+var Type = require('es-abstract/2023/Type');
+
+var SLOT = require('internal-slot');
+
+module.exports = function GeneratorStart(generator, closure) {
+	SLOT.assert(generator, '[[GeneratorState]]');
+	SLOT.assert(generator, '[[GeneratorContext]]');
+	SLOT.assert(generator, '[[GeneratorBrand]]');
+	SLOT.assert(generator, '[[Sentinel]]'); // our userland slot
+	SLOT.assert(generator, '[[CloseIfAbrupt]]'); // our second userland slot
+
+	if (!IsCallable(closure) || closure.length !== 0) {
+		throw new $TypeError('`closure` must be a function that takes no arguments');
+	}
+
+	var sentinel = SLOT.get(closure, '[[Sentinel]]');
+	if (Type(sentinel) !== 'Object') {
+		throw new $TypeError('`closure.[[Sentinel]]` must be an object');
+	}
+	SLOT.set(generator, '[[GeneratorContext]]', function () { // steps 2-5
+		try {
+			var result = closure();
+			if (result === sentinel) {
+				SLOT.set(generator, '[[GeneratorState]]', 'completed');
+				SLOT.set(generator, '[[GeneratorContext]]', null);
+				return CreateIterResultObject(void undefined, true);
+			}
+			SLOT.set(generator, '[[GeneratorState]]', 'suspendedYield');
+			return CreateIterResultObject(result, false);
+		} catch (e) {
+			SLOT.set(generator, '[[GeneratorState]]', 'completed');
+			SLOT.set(generator, '[[GeneratorContext]]', null);
+			throw e;
+		}
+	});
+
+	SLOT.set(generator, '[[GeneratorState]]', 'suspendedStart'); // step 6
+};