flow like the river

VISUALIZACION/node_modules/es-abstract/2019/ValidateAtomicAccess.js

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+'use strict';
+
+var GetIntrinsic = require('get-intrinsic');
+
+var $RangeError = GetIntrinsic('%RangeError%');
+var $TypeError = GetIntrinsic('%TypeError%');
+
+var ToIndex = require('./ToIndex');
+
+var isTypedArray = require('is-typed-array');
+var typedArrayLength = require('typed-array-length');
+
+// https://262.ecma-international.org/8.0/#sec-validateatomicaccess
+
+module.exports = function ValidateAtomicAccess(typedArray, requestIndex) {
+	if (!isTypedArray(typedArray)) {
+		throw new $TypeError('Assertion failed: `typedArray` must be a TypedArray'); // step 1
+	}
+
+	var accessIndex = ToIndex(requestIndex); // step 2
+
+	var length = typedArrayLength(typedArray); // step 3
+
+	/*
+	// this assertion can never be reached
+	if (!(accessIndex >= 0)) {
+		throw new $TypeError('Assertion failed: accessIndex >= 0'); // step 4
+	}
+	*/
+
+	if (accessIndex >= length) {
+		throw new $RangeError('index out of range'); // step 5
+	}
+
+	return accessIndex; // step 6
+};