1 files changed, 170 insertions, 0 deletions
diff --git a/node_modules/es-abstract/2018/ValidateAndApplyPropertyDescriptor.js b/node_modules/es-abstract/2018/ValidateAndApplyPropertyDescriptor.js
new file mode 100644
index 000000000..d4b900700
--- /dev/null
+++ b/node_modules/es-abstract/2018/ValidateAndApplyPropertyDescriptor.js
@@ -0,0 +1,170 @@
+'use strict';
+
+var GetIntrinsic = require('../GetIntrinsic');
+
+var $TypeError = GetIntrinsic('%TypeError%');
+
+var DefineOwnProperty = require('../helpers/DefineOwnProperty');
+var isPropertyDescriptor = require('../helpers/isPropertyDescriptor');
+var isSamePropertyDescriptor = require('../helpers/isSamePropertyDescriptor');
+
+var FromPropertyDescriptor = require('./FromPropertyDescriptor');
+var IsAccessorDescriptor = require('./IsAccessorDescriptor');
+var IsDataDescriptor = require('./IsDataDescriptor');
+var IsGenericDescriptor = require('./IsGenericDescriptor');
+var IsPropertyKey = require('./IsPropertyKey');
+var SameValue = require('./SameValue');
+var Type = require('./Type');
+
+// https://www.ecma-international.org/ecma-262/6.0/#sec-validateandapplypropertydescriptor
+// https://www.ecma-international.org/ecma-262/8.0/#sec-validateandapplypropertydescriptor
+
+// eslint-disable-next-line max-lines-per-function, max-statements, max-params
+module.exports = function ValidateAndApplyPropertyDescriptor(O, P, extensible, Desc, current) {
+	// this uses the ES2017+ logic, since it fixes a number of bugs in the ES2015 logic.
+	var oType = Type(O);
+	if (oType !== 'Undefined' && oType !== 'Object') {
+		throw new $TypeError('Assertion failed: O must be undefined or an Object');
+	}
+	if (Type(extensible) !== 'Boolean') {
+		throw new $TypeError('Assertion failed: extensible must be a Boolean');
+	}
+	if (!isPropertyDescriptor({
+		Type: Type,
+		IsDataDescriptor: IsDataDescriptor,
+		IsAccessorDescriptor: IsAccessorDescriptor
+	}, Desc)) {
+		throw new $TypeError('Assertion failed: Desc must be a Property Descriptor');
+	}
+	if (Type(current) !== 'Undefined' && !isPropertyDescriptor({
+		Type: Type,
+		IsDataDescriptor: IsDataDescriptor,
+		IsAccessorDescriptor: IsAccessorDescriptor
+	}, current)) {
+		throw new $TypeError('Assertion failed: current must be a Property Descriptor, or undefined');
+	}
+	if (oType !== 'Undefined' && !IsPropertyKey(P)) {
+		throw new $TypeError('Assertion failed: if O is not undefined, P must be a Property Key');
+	}
+	if (Type(current) === 'Undefined') {
+		if (!extensible) {
+			return false;
+		}
+		if (IsGenericDescriptor(Desc) || IsDataDescriptor(Desc)) {
+			if (oType !== 'Undefined') {
+				DefineOwnProperty(
+					IsDataDescriptor,
+					SameValue,
+					FromPropertyDescriptor,
+					O,
+					P,
+					{
+						'[[Configurable]]': Desc['[[Configurable]]'],
+						'[[Enumerable]]': Desc['[[Enumerable]]'],
+						'[[Value]]': Desc['[[Value]]'],
+						'[[Writable]]': Desc['[[Writable]]']
+					}
+				);
+			}
+		} else {
+			if (!IsAccessorDescriptor(Desc)) {
+				throw new $TypeError('Assertion failed: Desc is not an accessor descriptor');
+			}
+			if (oType !== 'Undefined') {
+				return DefineOwnProperty(
+					IsDataDescriptor,
+					SameValue,
+					FromPropertyDescriptor,
+					O,
+					P,
+					Desc
+				);
+			}
+		}
+		return true;
+	}
+	if (IsGenericDescriptor(Desc) && !('[[Configurable]]' in Desc) && !('[[Enumerable]]' in Desc)) {
+		return true;
+	}
+	if (isSamePropertyDescriptor({ SameValue: SameValue }, Desc, current)) {
+		return true; // removed by ES2017, but should still be correct
+	}
+	// "if every field in Desc is absent, return true" can't really match the assertion that it's a Property Descriptor
+	if (!current['[[Configurable]]']) {
+		if (Desc['[[Configurable]]']) {
+			return false;
+		}
+		if ('[[Enumerable]]' in Desc && !Desc['[[Enumerable]]'] === !!current['[[Enumerable]]']) {
+			return false;
+		}
+	}
+	if (IsGenericDescriptor(Desc)) {
+		// no further validation is required.
+	} else if (IsDataDescriptor(current) !== IsDataDescriptor(Desc)) {
+		if (!current['[[Configurable]]']) {
+			return false;
+		}
+		if (IsDataDescriptor(current)) {
+			if (oType !== 'Undefined') {
+				DefineOwnProperty(
+					IsDataDescriptor,
+					SameValue,
+					FromPropertyDescriptor,
+					O,
+					P,
+					{
+						'[[Configurable]]': current['[[Configurable]]'],
+						'[[Enumerable]]': current['[[Enumerable]]'],
+						'[[Get]]': undefined
+					}
+				);
+			}
+		} else if (oType !== 'Undefined') {
+			DefineOwnProperty(
+				IsDataDescriptor,
+				SameValue,
+				FromPropertyDescriptor,
+				O,
+				P,
+				{
+					'[[Configurable]]': current['[[Configurable]]'],
+					'[[Enumerable]]': current['[[Enumerable]]'],
+					'[[Value]]': undefined
+				}
+			);
+		}
+	} else if (IsDataDescriptor(current) && IsDataDescriptor(Desc)) {
+		if (!current['[[Configurable]]'] && !current['[[Writable]]']) {
+			if ('[[Writable]]' in Desc && Desc['[[Writable]]']) {
+				return false;
+			}
+			if ('[[Value]]' in Desc && !SameValue(Desc['[[Value]]'], current['[[Value]]'])) {
+				return false;
+			}
+			return true;
+		}
+	} else if (IsAccessorDescriptor(current) && IsAccessorDescriptor(Desc)) {
+		if (!current['[[Configurable]]']) {
+			if ('[[Set]]' in Desc && !SameValue(Desc['[[Set]]'], current['[[Set]]'])) {
+				return false;
+			}
+			if ('[[Get]]' in Desc && !SameValue(Desc['[[Get]]'], current['[[Get]]'])) {
+				return false;
+			}
+			return true;
+		}
+	} else {
+		throw new $TypeError('Assertion failed: current and Desc are not both data, both accessors, or one accessor and one data.');
+	}
+	if (oType !== 'Undefined') {
+		return DefineOwnProperty(
+			IsDataDescriptor,
+			SameValue,
+			FromPropertyDescriptor,
+			O,
+			P,
+			Desc
+		);
+	}
+	return true;
+};