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Compiles a string containing Javascript to an ESTree object and/or executes an ESTree object in Javascript
当前为
此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.greasyfork.icu/scripts/506614/1440561/ESTreeProcessor.js
/* eslint-disable no-bitwise */
// name ESTreeProcessor
// namespace https://github.com/mapomatic
// version 1.0.0
// description Converts AST (ESTree format) into JS
// author MapOMatic
// license GNU GPLv3
// ==/UserScript==
/*
* The esprima-next library is required to use this.
* The older esprima library might also work but it lacks some functions.
*/
// TODO: Not working:
// - Classes
// - Probably a lot more I haven't discovered yet.
/* eslint-disable eqeqeq */
/* eslint-disable max-classes-per-file */
/* eslint-disable no-multi-assign */
/* global esprima */
// eslint-disable-next-line func-names, no-unused-vars
const ESTreeProcessor = (function() {
'use strict';
const ScopeType = {
Global: 'Global',
Function: 'Function',
Block: 'Block'
};
const VariableType = {
Let: 'Let',
Const: 'Const',
Var: 'Var'
};
class Scope {
/** @type {Scope} */
parent;
variables = {};
/** @type {string} */
type;
constructor(type, parent) {
this.type = type;
this.parent = parent;
this.variables = {};
}
declare(type, name, value = undefined) {
this.checkAlreadyDeclared(name, type);
switch (type) {
case VariableType.Let:
this.variables[name] = { type, value };
break;
case VariableType.Const:
this.variables[name] = { type, value };
break;
case VariableType.Var: {
let scope = this;
while (scope) {
if (scope.type === ScopeType.Function || scope.type === ScopeType.Global) {
scope.variables[name] = { type, value };
scope = undefined;
} else {
scope = scope.parent;
}
}
break;
}
default:
throw new SyntaxError(`Unexpected variable declaration type: ${type}`);
}
}
checkAlreadyDeclared(name, type) {
let scope = this;
while (scope) {
if (scope.variables.hasOwnProperty(name)) {
if (type === VariableType.Const || type === VariableType.Let
|| scope.variables[name].type !== VariableType.Var) {
throw new SyntaxError(`Identifier '${name}' has already been declared`);
}
}
if (scope.type === ScopeType.Function || scope.type === ScopeType.Global) {
scope = undefined;
} else {
scope = scope.parent;
}
}
}
setValue(name, value) {
const reference = this.getReference(name, true);
if (!reference) {
throw new ReferenceError(`${name} is not defined.`);
}
if (reference.type === VariableType.Const) {
throw new TypeError(`Assignment to constant variable: ${name}`);
}
return (reference.value = value);
}
getValue(name) {
const reference = this.getReference(name);
return reference?.value;
}
getReference(name) {
let scope = this;
while (scope) {
if (scope.variables.hasOwnProperty(name)) {
return scope.variables[name];
}
if (scope.type === ScopeType.Global) {
scope = undefined;
} else {
scope = scope.parent;
}
}
return undefined;
}
createChildScope(type) {
return new Scope(type, this);
}
}
class FlowStopper {}
class Break extends FlowStopper {}
class Continue extends FlowStopper {}
class Return extends FlowStopper {
value;
constructor(value) {
super();
this.value = value;
}
}
class Debugger {}
class ChainIsNullish {}
// eslint-disable-next-line no-shadow
class ESTreeProcessor {
process(esTree, globalVariables) {
this.globalVariables = { ...globalVariables };
return { output: this.processNode(esTree, new Scope(ScopeType.Global)), variables: this.globalVariables };
}
processNode(node, scope) {
// if (!scope) debugger;
// if (!node) debugger;
let returnValue;
switch (node.type) {
case esprima.Syntax.Program:
returnValue = this.processProgram(node, scope);
break;
case esprima.Syntax.ExpressionStatement:
returnValue = this.processNode(node.expression, scope);
break;
case esprima.Syntax.Literal:
returnValue = ESTreeProcessor.processLiteral(node, scope);
break;
case esprima.Syntax.MemberExpression:
returnValue = this.processMemberExpression(node, scope);
break;
case esprima.Syntax.BinaryExpression:
returnValue = this.processBinaryExpression(node, scope);
break;
case esprima.Syntax.VariableDeclaration:
returnValue = this.processVariableDeclaration(node, scope);
break;
case esprima.Syntax.VariableDeclarator:
returnValue = this.processVariableDeclarator(node, scope);
break;
case esprima.Syntax.CallExpression:
returnValue = this.processCallExpression(node, scope);
break;
case esprima.Syntax.AssignmentExpression:
returnValue = this.processAssigmentExpression(node, scope);
break;
case esprima.Syntax.Identifier:
returnValue = ESTreeProcessor.processIdentifier(node, scope);
break;
case esprima.Syntax.IfStatement:
returnValue = this.processIfStatement(node, scope);
break;
case esprima.Syntax.BlockStatement:
returnValue = this.processBlockStatement(node, scope);
break;
case esprima.Syntax.EmptyStatement:
// do nothing;
break;
case esprima.Syntax.TemplateLiteral:
returnValue = this.processTemplateLiteral(node, scope);
break;
case esprima.Syntax.NewExpression:
returnValue = this.processNewExpression(node, scope);
break;
case esprima.Syntax.FunctionDeclaration:
returnValue = this.processFunctionDeclaration(node, scope);
break;
case esprima.Syntax.ReturnStatement:
returnValue = this.processReturnStatement(node, scope);
break;
case esprima.Syntax.LogicalExpression:
returnValue = this.processLogicalExpression(node, scope);
break;
case esprima.Syntax.UnaryExpression:
returnValue = this.processUnaryExpression(node, scope);
break;
case esprima.Syntax.ArrayExpression:
returnValue = this.processArrayExpression(node, scope);
break;
case esprima.Syntax.ConditionalExpression:
returnValue = this.processConditionalExpression(node, scope);
break;
case esprima.Syntax.ObjectExpression:
returnValue = this.processObjectExpression(node, scope);
break;
case esprima.Syntax.FunctionExpression:
returnValue = this.processFunctionExpression(node, scope);
break;
case esprima.Syntax.ArrowFunctionExpression:
returnValue = this.processArrowFunctionExpression(node, scope);
break;
case esprima.Syntax.ChainExpression:
returnValue = this.processChainExpression(node, scope);
break;
case esprima.Syntax.UpdateExpression:
returnValue = this.processUpdateExpression(node, scope);
break;
case esprima.Syntax.ForStatement:
returnValue = this.processForStatement(node, scope);
break;
case esprima.Syntax.TryStatement:
returnValue = this.processTryStatement(node, scope);
break;
case esprima.Syntax.BreakStatement:
returnValue = ESTreeProcessor.processBreakStatement();
break;
case esprima.Syntax.ContinueStatement:
returnValue = ESTreeProcessor.processContinueStatement();
break;
case esprima.Syntax.DebuggerStatement:
returnValue = ESTreeProcessor.processDebuggerStatement();
break;
case esprima.Syntax.SwitchStatement:
returnValue = this.processSwitchStatement(node, scope);
break;
default:
throw new SyntaxError(`Unexpected node type: ${node.type}`);
}
return returnValue;
}
processSwitchStatement(node, scope) {
const discriminant = this.processNode(node.discriminant, scope);
let matchIndex = -1;
let defaultIndex = -1;
for (let i = 0; i < node.cases.length && matchIndex === -1; i++) {
const switchCase = node.cases[i];
if (!switchCase.test) {
defaultIndex = i;
} else if (this.processNode(switchCase.test, scope) === discriminant) {
matchIndex = i;
}
}
if (matchIndex === -1) matchIndex = defaultIndex;
let returnValue;
if (matchIndex > -1) {
const switchScope = scope.createChildScope(ScopeType.Block);
for (let i = matchIndex; i < node.cases.length && !(returnValue instanceof FlowStopper); i++) {
let result;
const switchCase = node.cases[i];
for (let j = 0; j < switchCase.consequent.length && !(result instanceof FlowStopper); j++) {
result = this.processNode(switchCase.consequent[j], switchScope);
if (!(result instanceof Break || result instanceof Continue)) {
returnValue = result;
}
}
}
}
return returnValue;
}
static processDebuggerStatement() {
// eslint-disable-next-line no-debugger
debugger;
return new Debugger();
}
processTryStatement(node, scope) {
let returnValue;
try {
returnValue = this.processNode(node.block, scope);
} catch (e) {
// Based on research, I think a Function scope is appropriate here but not certain.
const catchScope = scope.createChildScope(ScopeType.Function);
node.handler.param.returnName = true;
catchScope.declare(VariableType.Var, this.processNode(node.handler.param, catchScope), e);
this.processNode(node.handler.body, catchScope);
} finally {
if (node.finalizer) {
this.processNode(node.finalizer, scope);
}
}
return returnValue;
}
processObjectExpression(node, scope) {
const returnValue = {};
node.properties.forEach(property => {
property.key.returnName = !node.computed;
const key = this.processNode(property.key, scope);
returnValue[key] = this.processNode(property.value, scope);
});
return returnValue;
}
processConditionalExpression(node, scope) {
const returnValue = this.processNode(node.test, scope) ? this.processNode(node.consequent, scope) : this.processNode(node.alternate, scope);
return returnValue;
}
processArrayExpression(node, scope) {
const returnValue = node.elements.map(element => this.processNode(element, scope));
return returnValue;
}
setScopeValue(targetNode, value, scope) {
switch (targetNode.type) {
case esprima.Syntax.MemberExpression: {
const object = this.processNode(targetNode.object, scope);
targetNode.property.returnName = true;
const propertyName = this.processNode(targetNode.property, scope);
object[propertyName] = value;
break;
}
case esprima.Syntax.Identifier:
scope.setValue(targetNode.name, value);
break;
default:
throw new SyntaxError(`Unexpected target node type in setValue(): ${targetNode.type}`);
}
return value;
}
processUpdateExpression(node, scope) {
const oldValue = this.processNode(node.argument, scope);
let newValue;
switch (node.operator) {
case '++':
newValue = this.setScopeValue(node.argument, oldValue + 1, scope);
break;
case '--':
newValue = this.setScopeValue(node.argument, oldValue - 1, scope);
break;
default:
throw new SyntaxError(`Unexpected update expression operator: ${node.operator}`);
}
return node.prefix ? newValue : oldValue;
}
processForStatement(node, scope) {
let returnValue;
this.processNode(node.init, scope);
while (this.processNode(node.test, scope)) {
returnValue = this.processNode(node.body, scope);
if (returnValue instanceof FlowStopper) {
if (returnValue instanceof Return) {
returnValue = returnValue.value;
}
break;
}
this.processNode(node.update, scope);
}
return returnValue;
}
processUnaryExpression(node, scope) {
let returnValue;
switch (node.operator) {
case '!':
returnValue = !this.processNode(node.argument, scope);
break;
case '~':
returnValue = ~this.processNode(node.argument, scope);
break;
case '-':
returnValue = -this.processNode(node.argument, scope);
break;
case 'typeof':
returnValue = typeof this.processNode(node.argument, scope);
break;
default:
throw new SyntaxError(`Unexpected unary expression operator: ${node.operator}`);
}
return returnValue;
}
processLogicalExpression(node, scope) {
let returnValue;
switch (node.operator) {
case '&&':
returnValue = this.processNode(node.left, scope) && this.processNode(node.right, scope);
break;
case '||':
returnValue = this.processNode(node.left, scope) || this.processNode(node.right, scope);
break;
case '??':
returnValue = this.processNode(node.left, scope) ?? this.processNode(node.right, scope);
break;
default:
throw new SyntaxError(`Unexpected logical expression operator: ${node.operator}`);
}
return returnValue;
}
processReturnStatement(node, scope) {
const returnValue = this.processNode(node.argument, scope);
return new Return(returnValue);
}
static processContinueStatement() {
return new Continue();
}
static processBreakStatement() {
return new Break();
}
/**
*
* @param {*} node
* @param {Scope} scope
* @returns
*/
processArrowFunctionExpression(node, scope) {
const func = (...args) => {
const esTreeArgs = args.map(arg => {
const argNode = {
type: esprima.Syntax.Literal,
value: arg
};
return argNode;
});
const funcScope = scope.createChildScope(ScopeType.Function);
for (let i = 0; i < Math.min(esTreeArgs.length, node.params.length); i++) {
const param = node.params[i];
param.returnName = true;
funcScope.declare(
VariableType.Var,
this.processNode(param, funcScope),
this.processNode(esTreeArgs[i], funcScope)
);
}
let returnValue = this.processNode(node.body, funcScope);
if (returnValue instanceof Return) {
returnValue = returnValue.value;
}
return returnValue;
};
return func;
}
processChainExpression(node, scope) {
let returnValue;
switch (node.expression.type) {
case esprima.Syntax.CallExpression:
case esprima.Syntax.MemberExpression: {
returnValue = this.processNode(node.expression, scope);
break;
}
default:
throw new SyntaxError(`Unexpected chain expression type: ${node.expression.type}`);
}
if (returnValue instanceof ChainIsNullish) returnValue = undefined;
return returnValue;
}
processFunctionDeclaration(node, scope) {
const func = (...args) => {
const esTreeArgs = args.map(arg => {
const argNode = {
type: esprima.Syntax.Literal,
value: arg
};
return argNode;
});
const funcScope = scope.createChildScope(ScopeType.Function);
for (let i = 0; i < Math.min(esTreeArgs.length, node.params.length); i++) {
const param = node.params[i];
param.returnName = true;
funcScope.declare(
VariableType.Var,
this.processNode(param, funcScope),
this.processNode(esTreeArgs[i], funcScope)
);
}
let returnValue = this.processNode(node.body, funcScope);
if (returnValue instanceof Return) {
returnValue = returnValue.value;
}
return returnValue;
};
if (node.id) {
node.id.returnName = true;
const funcName = this.processNode(node.id, scope);
scope.declare(VariableType.Var, funcName, func);
}
return func;
}
processFunctionExpression(node, scope) {
const func = (...args) => {
const esTreeArgs = args.map(arg => {
const argNode = {
type: esprima.Syntax.Literal,
value: arg
};
return argNode;
});
const funcScope = scope.createChildScope(ScopeType.Function);
for (let i = 0; i < Math.min(esTreeArgs.length, node.params.length); i++) {
const param = node.params[i];
param.returnName = true;
funcScope.declare(
VariableType.Var,
this.processNode(param, funcScope),
this.processNode(esTreeArgs[i], funcScope)
);
}
let returnValue = this.processNode(node.body, funcScope);
if (returnValue instanceof Return) {
returnValue = returnValue.value;
}
return returnValue;
};
return func;
}
processProgram(node, scope) {
let returnValue;
// Add global variables
Object.keys(this.globalVariables).forEach(key => {
scope.declare(VariableType.Let, key, this.globalVariables[key]);
});
node.body.forEach(childNode => {
returnValue = this.processNode(childNode, scope);
});
// this._scopeContainer.removeCurrentScope();
return returnValue;
}
processNewExpression(node, scope) {
const args = node.arguments.map(argument => this.processNode(argument, scope));
return Reflect.construct(this.processNode(node.callee, scope), args);
}
processTemplateLiteral(node, scope) {
let returnValue = '';
for (let i = 0; i < node.quasis.length; i++) {
returnValue += node.quasis[i].value.cooked;
if (!node.quasis[i].tail) {
returnValue += this.processNode(node.expressions[i], scope);
}
}
return returnValue;
}
processBlockStatement(node, scope) {
let returnValue;
// TODO: I don't think we need to ignore the block scope in a function declaration. Test it.
// switch (context.type) {
// case esprima.Syntax.FunctionDeclaration:
// break;
// default:
const blockScope = scope.createChildScope(ScopeType.Block);
// }
for (let i = 0; i < node.body.length; i++) {
const childNode = node.body[i];
const result = this.processNode(childNode, blockScope);
if (result instanceof FlowStopper) {
if (result instanceof Return) {
returnValue = result;
}
break;
} else if (result instanceof Debugger) {
// do nothing
} else {
returnValue = result;
}
}
return returnValue;
}
processIfStatement(node, scope) {
let returnValue;
const test = this.processNode(node.test, scope);
if (test) {
returnValue = this.processNode(node.consequent, scope);
} else if (node.alternate) {
returnValue = this.processNode(node.alternate, scope);
}
return returnValue;
}
static processLiteral(node) {
return node.value;
}
static processIdentifier(node, scope) {
let returnValue;
if (node.returnName) {
returnValue = node.name;
} else {
returnValue = scope.getValue(node.name);
}
return returnValue;
}
/**
*
* @param {*} expression
* @param {Scope} scope
* @returns
*/
getMemberExpressionObject(expression, scope) {
let returnValue;
switch (expression.object.type) {
case esprima.Syntax.Identifier: {
returnValue = scope.getValue(expression.object.name);
break;
}
case esprima.Syntax.CallExpression:
case esprima.Syntax.MemberExpression: {
const object = this.processNode(expression.object, scope);
returnValue = object;
break;
}
default:
throw new SyntaxError(`Unexpected member expression object type: ${expression.object.type}`);
}
return returnValue;
}
processMemberExpression(node, scope) {
let returnValue;
const object = this.getMemberExpressionObject(node, scope);
if (object == null && node.optional) {
returnValue = new ChainIsNullish();
} else if (object != null || (object == null && !node.optional)) {
node.property.returnName = !node.computed;
const propertyName = this.processNode(node.property, scope);
// if (object[propertyName] == null) {
// console.warn(`Object does not contain this property: ${propertyName}`);
// }
returnValue = object[propertyName];
}
return returnValue;
}
doBinaryExpression(node, func, scope) {
return func(this.processNode(node.left, scope), this.processNode(node.right, scope));
}
static add(left, right) {
return left + right;
}
static subtract(left, right) {
return left - right;
}
static multiply(left, right) {
return left * right;
}
static divide(left, right) {
return left / right;
}
static mod(left, right) {
return left % right;
}
static power(left, right) {
return left ** right;
}
processBinaryExpression(node, scope) {
let returnValue;
const process = operation => this.doBinaryExpression(node, operation, scope);
switch (node.operator) {
case '+':
returnValue = process(ESTreeProcessor.add);
break;
case '-':
returnValue = process(ESTreeProcessor.subtract);
break;
case '*':
returnValue = process(ESTreeProcessor.multiply);
break;
case '/':
returnValue = process(ESTreeProcessor.divide);
break;
case '%':
returnValue = process(ESTreeProcessor.mod);
break;
case '**':
returnValue = process(ESTreeProcessor.power);
break;
case '>':
returnValue = process((left, right) => left > right);
break;
case '<':
returnValue = process((left, right) => left < right);
break;
case '==':
returnValue = process((left, right) => left == right);
break;
case '===':
returnValue = process((left, right) => left === right);
break;
case '>=':
returnValue = process((left, right) => left >= right);
break;
case '<=':
returnValue = process((left, right) => left <= right);
break;
case '!=':
returnValue = process((left, right) => left != right);
break;
case '!==':
returnValue = process((left, right) => left !== right);
break;
case '^':
returnValue = process(ESTreeProcessor.bitwiseXOR);
break;
case '|':
returnValue = process(ESTreeProcessor.bitwiseOR);
break;
case '&':
returnValue = process(ESTreeProcessor.bitwiseAND);
break;
case '>>':
returnValue = process(ESTreeProcessor.bitwiseRightShift);
break;
case '<<':
returnValue = process(ESTreeProcessor.bitwiseLeftShift);
break;
case '>>>':
returnValue = process(ESTreeProcessor.bitwiseUnsignedRightShift);
break;
default:
throw new SyntaxError(`Unexpected binary expression operator: ${node.operator}`);
}
return returnValue;
}
processVariableDeclaration(node, scope) {
switch (node.kind) {
case 'let':
case 'const':
case 'var':
node.declarations.forEach(declaration => {
declaration.kind = node.kind;
this.processNode(declaration, scope);
});
break;
default:
throw new SyntaxError(`Unexpected variable declaration kind: ${node.type}`);
}
// I believe declarations always return undefined
}
/**
*
* @param {*} node
* @param {Scope} scope
*/
processVariableDeclarator(node, scope) {
switch (node.id.type) {
case esprima.Syntax.Identifier: {
node.id.returnName = true;
const name = this.processNode(node.id, scope);
const value = node.init ? this.processNode(node.init, scope) : undefined;
let declarationType;
switch (node.kind) {
case 'let':
declarationType = VariableType.Let;
break;
case 'const':
declarationType = VariableType.Const;
break;
case 'var':
declarationType = VariableType.Var;
break;
default:
throw new TypeError(`Unexpected variable declaration kind: ${node.kind}`);
}
scope.declare(declarationType, name, value);
break;
}
case esprima.Syntax.ObjectPattern: {
const object = this.processNode(node.init, scope);
node.id.properties.forEach(property => {
property.key.returnName = true;
const name = this.processNode(property.key, scope);
property.value.returnName = true;
const valueName = this.processNode(property.value, scope);
const value = object[valueName];
let declarationType;
switch (node.kind) {
case 'let':
declarationType = VariableType.Let;
break;
case 'const':
declarationType = VariableType.Const;
break;
case 'var':
declarationType = VariableType.Var;
break;
default:
throw new TypeError(`Unexpected variable declaration kind: ${node.kind}`);
}
scope.declare(declarationType, name, value);
});
break;
}
default:
throw new SyntaxError(`Unexpected variable declarator id type: ${node.id.type}`);
}
}
/**
*
* @param {*} node
* @param {Scope} scope
* @returns
*/
processCallExpression(node, scope) {
// TODO: This code doesn't pass the sniff test. Need to work on it.
const { callee } = node;
let methodToCall;
let calleeObject;
let returnValue;
switch (callee.type) {
case esprima.Syntax.MemberExpression: {
calleeObject = this.processNode(callee.object, scope);
if (calleeObject == null) {
if (callee.optional) {
returnValue = new ChainIsNullish();
} else {
throw new SyntaxError('Callee object not found in call expression.');
}
} else if (calleeObject instanceof ChainIsNullish) {
returnValue = new ChainIsNullish();
} else {
methodToCall = calleeObject[callee.property.name];
}
break;
}
case esprima.Syntax.Identifier:
methodToCall = scope.getValue(callee.name);
break;
default:
throw new SyntaxError(`Unexpected callee type in call expression: ${callee.type}`);
}
if (!(returnValue instanceof ChainIsNullish)) {
if (methodToCall == null) {
if (node.optional) {
returnValue = new ChainIsNullish();
} else {
let methodName;
switch (callee.type) {
case esprima.Syntax.Identifier:
methodName = callee.name;
break;
case esprima.Syntax.MemberExpression:
callee.property.returnName = true;
methodName = this.processNode(callee.property);
break;
default:
}
throw new SyntaxError(`Method not found: ${methodName}`);
}
} else {
const args = node.arguments.map(arg => this.processNode(arg, scope));
// if (!methodToCall) debugger;
returnValue = methodToCall.call(calleeObject, ...args);
}
}
return returnValue;
}
doAssignmentExpression(node, func, scope) {
let returnValue;
let leftValue;
switch (node.left.type) {
case esprima.Syntax.Identifier: {
leftValue = scope.getValue(node.left.name);
returnValue = this.setScopeValue(node.left, func(leftValue, this.processNode(node.right, scope)), scope);
break;
}
case esprima.Syntax.MemberExpression: {
const object = this.getMemberExpressionObject(node.left, scope);
const propertyName = this.processNode(node.left.property, scope);
leftValue = object[propertyName];
returnValue = (object[propertyName] = func(leftValue, this.processNode(node.right, scope)));
break;
}
default:
throw new SyntaxError(`Unexpected type on left side of assignment expression: ${node.left.type}`);
}
return returnValue;
}
static nullishCoalesce(left, right) {
return left ?? right;
}
static or(left, right) {
return left || right;
}
static and(left, right) {
return left && right;
}
static bitwiseAND(left, right) {
return left & right;
}
static bitwiseOR(left, right) {
return left | right;
}
static bitwiseXOR(left, right) {
return left ^ right;
}
static bitwiseLeftShift(left, right) {
return left << right;
}
static bitwiseRightShift(left, right) {
return left >> right;
}
static bitwiseUnsignedRightShift(left, right) {
return left >>> right;
}
processAssigmentExpression(node, scope) {
let returnValue;
const assign = operation => this.doAssignmentExpression(node, operation, scope);
switch (node.operator) {
case '=':
returnValue = this.setScopeValue(node.left, this.processNode(node.right, scope), scope);
break;
case '+=':
returnValue = assign(ESTreeProcessor.add);
break;
case '-=':
returnValue = assign(ESTreeProcessor.subtract);
break;
case '*=':
returnValue = assign(ESTreeProcessor.multiply);
break;
case '/=':
returnValue = assign(ESTreeProcessor.divide);
break;
case '%=':
returnValue = assign(ESTreeProcessor.mod);
break;
case '**=':
returnValue = assign(ESTreeProcessor.power);
break;
case '??=':
returnValue = assign(ESTreeProcessor.nullishCoalesce);
break;
case '||=':
returnValue = assign(ESTreeProcessor.or);
break;
case '&&=':
returnValue = assign(ESTreeProcessor.and);
break;
case '<<=':
returnValue = assign(ESTreeProcessor.bitwiseLeftShift);
break;
case '>>=':
returnValue = assign(ESTreeProcessor.bitwiseRightShift);
break;
case '>>>=':
returnValue = assign(ESTreeProcessor.bitwiseUnsignedRightShift);
break;
case '&=':
returnValue = assign(ESTreeProcessor.bitwiseAND);
break;
case '|=':
returnValue = assign(ESTreeProcessor.bitwiseOR);
break;
case '^=':
returnValue = assign(ESTreeProcessor.bitwiseXOR);
break;
default:
throw new SyntaxError(`Unexpected assigment expression operator: ${node.operator}`);
}
return returnValue;
}
}
return ESTreeProcessor;
})();