2241 lines
68 KiB
JavaScript
2241 lines
68 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, '__esModule', { value: true });
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var assert = require('assert');
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var estraverse = require('estraverse');
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var esrecurse = require('esrecurse');
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function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }
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var assert__default = /*#__PURE__*/_interopDefaultLegacy(assert);
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var estraverse__default = /*#__PURE__*/_interopDefaultLegacy(estraverse);
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var esrecurse__default = /*#__PURE__*/_interopDefaultLegacy(esrecurse);
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/*
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Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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|
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* Redistributions of source code must retain the above copyright
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|
notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
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|
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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const READ = 0x1;
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const WRITE = 0x2;
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const RW = READ | WRITE;
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/**
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* A Reference represents a single occurrence of an identifier in code.
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* @constructor Reference
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*/
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class Reference {
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constructor(ident, scope, flag, writeExpr, maybeImplicitGlobal, partial, init) {
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/**
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* Identifier syntax node.
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* @member {espreeIdentifier} Reference#identifier
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*/
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this.identifier = ident;
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/**
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* Reference to the enclosing Scope.
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* @member {Scope} Reference#from
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*/
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this.from = scope;
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/**
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* Whether the reference comes from a dynamic scope (such as 'eval',
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* 'with', etc.), and may be trapped by dynamic scopes.
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* @member {boolean} Reference#tainted
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*/
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this.tainted = false;
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/**
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* The variable this reference is resolved with.
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* @member {Variable} Reference#resolved
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*/
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this.resolved = null;
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/**
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* The read-write mode of the reference. (Value is one of {@link
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* Reference.READ}, {@link Reference.RW}, {@link Reference.WRITE}).
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* @member {number} Reference#flag
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* @private
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*/
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this.flag = flag;
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if (this.isWrite()) {
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/**
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* If reference is writeable, this is the tree being written to it.
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* @member {espreeNode} Reference#writeExpr
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*/
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this.writeExpr = writeExpr;
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/**
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* Whether the Reference might refer to a partial value of writeExpr.
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* @member {boolean} Reference#partial
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*/
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this.partial = partial;
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/**
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* Whether the Reference is to write of initialization.
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* @member {boolean} Reference#init
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*/
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this.init = init;
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}
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this.__maybeImplicitGlobal = maybeImplicitGlobal;
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}
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/**
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* Whether the reference is static.
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* @function Reference#isStatic
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* @returns {boolean} static
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*/
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isStatic() {
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return !this.tainted && this.resolved && this.resolved.scope.isStatic();
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}
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/**
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* Whether the reference is writeable.
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* @function Reference#isWrite
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* @returns {boolean} write
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*/
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isWrite() {
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return !!(this.flag & Reference.WRITE);
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}
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/**
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* Whether the reference is readable.
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* @function Reference#isRead
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* @returns {boolean} read
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*/
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isRead() {
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return !!(this.flag & Reference.READ);
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}
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/**
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* Whether the reference is read-only.
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* @function Reference#isReadOnly
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* @returns {boolean} read only
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*/
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isReadOnly() {
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return this.flag === Reference.READ;
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}
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/**
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* Whether the reference is write-only.
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* @function Reference#isWriteOnly
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* @returns {boolean} write only
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*/
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isWriteOnly() {
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return this.flag === Reference.WRITE;
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}
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/**
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* Whether the reference is read-write.
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* @function Reference#isReadWrite
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* @returns {boolean} read write
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*/
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isReadWrite() {
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return this.flag === Reference.RW;
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}
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}
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/**
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* @constant Reference.READ
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* @private
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*/
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Reference.READ = READ;
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/**
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* @constant Reference.WRITE
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* @private
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*/
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Reference.WRITE = WRITE;
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/**
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* @constant Reference.RW
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* @private
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*/
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Reference.RW = RW;
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/* vim: set sw=4 ts=4 et tw=80 : */
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/*
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Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>
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Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
|
|
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* A Variable represents a locally scoped identifier. These include arguments to
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* functions.
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* @constructor Variable
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*/
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class Variable {
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constructor(name, scope) {
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/**
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* The variable name, as given in the source code.
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* @member {string} Variable#name
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*/
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this.name = name;
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/**
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* List of defining occurrences of this variable (like in 'var ...'
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* statements or as parameter), as AST nodes.
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* @member {espree.Identifier[]} Variable#identifiers
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*/
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this.identifiers = [];
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/**
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* List of {@link Reference|references} of this variable (excluding parameter entries)
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* in its defining scope and all nested scopes. For defining
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* occurrences only see {@link Variable#defs}.
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* @member {Reference[]} Variable#references
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*/
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this.references = [];
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/**
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* List of defining occurrences of this variable (like in 'var ...'
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* statements or as parameter), as custom objects.
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* @member {Definition[]} Variable#defs
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*/
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this.defs = [];
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this.tainted = false;
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/**
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* Whether this is a stack variable.
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* @member {boolean} Variable#stack
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*/
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this.stack = true;
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/**
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* Reference to the enclosing Scope.
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* @member {Scope} Variable#scope
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*/
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this.scope = scope;
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}
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}
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Variable.CatchClause = "CatchClause";
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Variable.Parameter = "Parameter";
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Variable.FunctionName = "FunctionName";
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Variable.ClassName = "ClassName";
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Variable.Variable = "Variable";
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Variable.ImportBinding = "ImportBinding";
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Variable.ImplicitGlobalVariable = "ImplicitGlobalVariable";
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/* vim: set sw=4 ts=4 et tw=80 : */
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/*
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Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>
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|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
|
|
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
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*/
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/**
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* @constructor Definition
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*/
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class Definition {
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constructor(type, name, node, parent, index, kind) {
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/**
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* @member {string} Definition#type - type of the occurrence (e.g. "Parameter", "Variable", ...).
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*/
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this.type = type;
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/**
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* @member {espree.Identifier} Definition#name - the identifier AST node of the occurrence.
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*/
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this.name = name;
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/**
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* @member {espree.Node} Definition#node - the enclosing node of the identifier.
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*/
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this.node = node;
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/**
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* @member {espree.Node?} Definition#parent - the enclosing statement node of the identifier.
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*/
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this.parent = parent;
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/**
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* @member {number?} Definition#index - the index in the declaration statement.
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*/
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this.index = index;
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/**
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* @member {string?} Definition#kind - the kind of the declaration statement.
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*/
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this.kind = kind;
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}
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}
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/**
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* @constructor ParameterDefinition
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*/
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class ParameterDefinition extends Definition {
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constructor(name, node, index, rest) {
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super(Variable.Parameter, name, node, null, index, null);
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/**
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* Whether the parameter definition is a part of a rest parameter.
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* @member {boolean} ParameterDefinition#rest
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*/
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this.rest = rest;
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}
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}
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/* vim: set sw=4 ts=4 et tw=80 : */
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/*
|
|
Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
|
|
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
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*/
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const { Syntax: Syntax$2 } = estraverse__default["default"];
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/**
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* Test if scope is struct
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* @param {Scope} scope scope
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* @param {Block} block block
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* @param {boolean} isMethodDefinition is method definition
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* @param {boolean} useDirective use directive
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* @returns {boolean} is strict scope
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*/
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function isStrictScope(scope, block, isMethodDefinition, useDirective) {
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let body;
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// When upper scope is exists and strict, inner scope is also strict.
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if (scope.upper && scope.upper.isStrict) {
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return true;
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}
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if (isMethodDefinition) {
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return true;
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}
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if (scope.type === "class" || scope.type === "module") {
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return true;
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}
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if (scope.type === "block" || scope.type === "switch") {
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return false;
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}
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if (scope.type === "function") {
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if (block.type === Syntax$2.ArrowFunctionExpression && block.body.type !== Syntax$2.BlockStatement) {
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return false;
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}
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if (block.type === Syntax$2.Program) {
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body = block;
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} else {
|
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body = block.body;
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}
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if (!body) {
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return false;
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}
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} else if (scope.type === "global") {
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body = block;
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} else {
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return false;
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}
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// Search 'use strict' directive.
|
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if (useDirective) {
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for (let i = 0, iz = body.body.length; i < iz; ++i) {
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const stmt = body.body[i];
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if (stmt.type !== Syntax$2.DirectiveStatement) {
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break;
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}
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if (stmt.raw === "\"use strict\"" || stmt.raw === "'use strict'") {
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return true;
|
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}
|
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}
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} else {
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for (let i = 0, iz = body.body.length; i < iz; ++i) {
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const stmt = body.body[i];
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if (stmt.type !== Syntax$2.ExpressionStatement) {
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break;
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}
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const expr = stmt.expression;
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if (expr.type !== Syntax$2.Literal || typeof expr.value !== "string") {
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break;
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}
|
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if (expr.raw !== null && expr.raw !== undefined) {
|
|
if (expr.raw === "\"use strict\"" || expr.raw === "'use strict'") {
|
|
return true;
|
|
}
|
|
} else {
|
|
if (expr.value === "use strict") {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
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return false;
|
|
}
|
|
|
|
/**
|
|
* Register scope
|
|
* @param {ScopeManager} scopeManager scope manager
|
|
* @param {Scope} scope scope
|
|
* @returns {void}
|
|
*/
|
|
function registerScope(scopeManager, scope) {
|
|
scopeManager.scopes.push(scope);
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|
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|
const scopes = scopeManager.__nodeToScope.get(scope.block);
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|
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|
if (scopes) {
|
|
scopes.push(scope);
|
|
} else {
|
|
scopeManager.__nodeToScope.set(scope.block, [scope]);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Should be statically
|
|
* @param {Object} def def
|
|
* @returns {boolean} should be statically
|
|
*/
|
|
function shouldBeStatically(def) {
|
|
return (
|
|
(def.type === Variable.ClassName) ||
|
|
(def.type === Variable.Variable && def.parent.kind !== "var")
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @constructor Scope
|
|
*/
|
|
class Scope {
|
|
constructor(scopeManager, type, upperScope, block, isMethodDefinition) {
|
|
|
|
/**
|
|
* One of "global", "module", "function", "function-expression-name", "block", "switch", "catch", "with", "for",
|
|
* "class", "class-field-initializer", "class-static-block".
|
|
* @member {string} Scope#type
|
|
*/
|
|
this.type = type;
|
|
|
|
/**
|
|
* The scoped {@link Variable}s of this scope, as <code>{ Variable.name
|
|
* : Variable }</code>.
|
|
* @member {Map} Scope#set
|
|
*/
|
|
this.set = new Map();
|
|
|
|
/**
|
|
* The tainted variables of this scope, as <code>{ Variable.name :
|
|
* boolean }</code>.
|
|
* @member {Map} Scope#taints */
|
|
this.taints = new Map();
|
|
|
|
/**
|
|
* Generally, through the lexical scoping of JS you can always know
|
|
* which variable an identifier in the source code refers to. There are
|
|
* a few exceptions to this rule. With 'global' and 'with' scopes you
|
|
* can only decide at runtime which variable a reference refers to.
|
|
* Moreover, if 'eval()' is used in a scope, it might introduce new
|
|
* bindings in this or its parent scopes.
|
|
* All those scopes are considered 'dynamic'.
|
|
* @member {boolean} Scope#dynamic
|
|
*/
|
|
this.dynamic = this.type === "global" || this.type === "with";
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|
|
|
/**
|
|
* A reference to the scope-defining syntax node.
|
|
* @member {espree.Node} Scope#block
|
|
*/
|
|
this.block = block;
|
|
|
|
/**
|
|
* The {@link Reference|references} that are not resolved with this scope.
|
|
* @member {Reference[]} Scope#through
|
|
*/
|
|
this.through = [];
|
|
|
|
/**
|
|
* The scoped {@link Variable}s of this scope. In the case of a
|
|
* 'function' scope this includes the automatic argument <em>arguments</em> as
|
|
* its first element, as well as all further formal arguments.
|
|
* @member {Variable[]} Scope#variables
|
|
*/
|
|
this.variables = [];
|
|
|
|
/**
|
|
* Any variable {@link Reference|reference} found in this scope. This
|
|
* includes occurrences of local variables as well as variables from
|
|
* parent scopes (including the global scope). For local variables
|
|
* this also includes defining occurrences (like in a 'var' statement).
|
|
* In a 'function' scope this does not include the occurrences of the
|
|
* formal parameter in the parameter list.
|
|
* @member {Reference[]} Scope#references
|
|
*/
|
|
this.references = [];
|
|
|
|
/**
|
|
* For 'global' and 'function' scopes, this is a self-reference. For
|
|
* other scope types this is the <em>variableScope</em> value of the
|
|
* parent scope.
|
|
* @member {Scope} Scope#variableScope
|
|
*/
|
|
this.variableScope =
|
|
this.type === "global" ||
|
|
this.type === "module" ||
|
|
this.type === "function" ||
|
|
this.type === "class-field-initializer" ||
|
|
this.type === "class-static-block"
|
|
? this
|
|
: upperScope.variableScope;
|
|
|
|
/**
|
|
* Whether this scope is created by a FunctionExpression.
|
|
* @member {boolean} Scope#functionExpressionScope
|
|
*/
|
|
this.functionExpressionScope = false;
|
|
|
|
/**
|
|
* Whether this is a scope that contains an 'eval()' invocation.
|
|
* @member {boolean} Scope#directCallToEvalScope
|
|
*/
|
|
this.directCallToEvalScope = false;
|
|
|
|
/**
|
|
* @member {boolean} Scope#thisFound
|
|
*/
|
|
this.thisFound = false;
|
|
|
|
this.__left = [];
|
|
|
|
/**
|
|
* Reference to the parent {@link Scope|scope}.
|
|
* @member {Scope} Scope#upper
|
|
*/
|
|
this.upper = upperScope;
|
|
|
|
/**
|
|
* Whether 'use strict' is in effect in this scope.
|
|
* @member {boolean} Scope#isStrict
|
|
*/
|
|
this.isStrict = scopeManager.isStrictModeSupported()
|
|
? isStrictScope(this, block, isMethodDefinition, scopeManager.__useDirective())
|
|
: false;
|
|
|
|
/**
|
|
* List of nested {@link Scope}s.
|
|
* @member {Scope[]} Scope#childScopes
|
|
*/
|
|
this.childScopes = [];
|
|
if (this.upper) {
|
|
this.upper.childScopes.push(this);
|
|
}
|
|
|
|
this.__declaredVariables = scopeManager.__declaredVariables;
|
|
|
|
registerScope(scopeManager, this);
|
|
}
|
|
|
|
__shouldStaticallyClose(scopeManager) {
|
|
return (!this.dynamic || scopeManager.__isOptimistic());
|
|
}
|
|
|
|
__shouldStaticallyCloseForGlobal(ref) {
|
|
|
|
// On global scope, let/const/class declarations should be resolved statically.
|
|
const name = ref.identifier.name;
|
|
|
|
if (!this.set.has(name)) {
|
|
return false;
|
|
}
|
|
|
|
const variable = this.set.get(name);
|
|
const defs = variable.defs;
|
|
|
|
return defs.length > 0 && defs.every(shouldBeStatically);
|
|
}
|
|
|
|
__staticCloseRef(ref) {
|
|
if (!this.__resolve(ref)) {
|
|
this.__delegateToUpperScope(ref);
|
|
}
|
|
}
|
|
|
|
__dynamicCloseRef(ref) {
|
|
|
|
// notify all names are through to global
|
|
let current = this;
|
|
|
|
do {
|
|
current.through.push(ref);
|
|
current = current.upper;
|
|
} while (current);
|
|
}
|
|
|
|
__globalCloseRef(ref) {
|
|
|
|
// let/const/class declarations should be resolved statically.
|
|
// others should be resolved dynamically.
|
|
if (this.__shouldStaticallyCloseForGlobal(ref)) {
|
|
this.__staticCloseRef(ref);
|
|
} else {
|
|
this.__dynamicCloseRef(ref);
|
|
}
|
|
}
|
|
|
|
__close(scopeManager) {
|
|
let closeRef;
|
|
|
|
if (this.__shouldStaticallyClose(scopeManager)) {
|
|
closeRef = this.__staticCloseRef;
|
|
} else if (this.type !== "global") {
|
|
closeRef = this.__dynamicCloseRef;
|
|
} else {
|
|
closeRef = this.__globalCloseRef;
|
|
}
|
|
|
|
// Try Resolving all references in this scope.
|
|
for (let i = 0, iz = this.__left.length; i < iz; ++i) {
|
|
const ref = this.__left[i];
|
|
|
|
closeRef.call(this, ref);
|
|
}
|
|
this.__left = null;
|
|
|
|
return this.upper;
|
|
}
|
|
|
|
// To override by function scopes.
|
|
// References in default parameters isn't resolved to variables which are in their function body.
|
|
__isValidResolution(ref, variable) { // eslint-disable-line class-methods-use-this, no-unused-vars
|
|
return true;
|
|
}
|
|
|
|
__resolve(ref) {
|
|
const name = ref.identifier.name;
|
|
|
|
if (!this.set.has(name)) {
|
|
return false;
|
|
}
|
|
const variable = this.set.get(name);
|
|
|
|
if (!this.__isValidResolution(ref, variable)) {
|
|
return false;
|
|
}
|
|
variable.references.push(ref);
|
|
variable.stack = variable.stack && ref.from.variableScope === this.variableScope;
|
|
if (ref.tainted) {
|
|
variable.tainted = true;
|
|
this.taints.set(variable.name, true);
|
|
}
|
|
ref.resolved = variable;
|
|
|
|
return true;
|
|
}
|
|
|
|
__delegateToUpperScope(ref) {
|
|
if (this.upper) {
|
|
this.upper.__left.push(ref);
|
|
}
|
|
this.through.push(ref);
|
|
}
|
|
|
|
__addDeclaredVariablesOfNode(variable, node) {
|
|
if (node === null || node === undefined) {
|
|
return;
|
|
}
|
|
|
|
let variables = this.__declaredVariables.get(node);
|
|
|
|
if (variables === null || variables === undefined) {
|
|
variables = [];
|
|
this.__declaredVariables.set(node, variables);
|
|
}
|
|
if (variables.indexOf(variable) === -1) {
|
|
variables.push(variable);
|
|
}
|
|
}
|
|
|
|
__defineGeneric(name, set, variables, node, def) {
|
|
let variable;
|
|
|
|
variable = set.get(name);
|
|
if (!variable) {
|
|
variable = new Variable(name, this);
|
|
set.set(name, variable);
|
|
variables.push(variable);
|
|
}
|
|
|
|
if (def) {
|
|
variable.defs.push(def);
|
|
this.__addDeclaredVariablesOfNode(variable, def.node);
|
|
this.__addDeclaredVariablesOfNode(variable, def.parent);
|
|
}
|
|
if (node) {
|
|
variable.identifiers.push(node);
|
|
}
|
|
}
|
|
|
|
__define(node, def) {
|
|
if (node && node.type === Syntax$2.Identifier) {
|
|
this.__defineGeneric(
|
|
node.name,
|
|
this.set,
|
|
this.variables,
|
|
node,
|
|
def
|
|
);
|
|
}
|
|
}
|
|
|
|
__referencing(node, assign, writeExpr, maybeImplicitGlobal, partial, init) {
|
|
|
|
// because Array element may be null
|
|
if (!node || node.type !== Syntax$2.Identifier) {
|
|
return;
|
|
}
|
|
|
|
// Specially handle like `this`.
|
|
if (node.name === "super") {
|
|
return;
|
|
}
|
|
|
|
const ref = new Reference(node, this, assign || Reference.READ, writeExpr, maybeImplicitGlobal, !!partial, !!init);
|
|
|
|
this.references.push(ref);
|
|
this.__left.push(ref);
|
|
}
|
|
|
|
__detectEval() {
|
|
let current = this;
|
|
|
|
this.directCallToEvalScope = true;
|
|
do {
|
|
current.dynamic = true;
|
|
current = current.upper;
|
|
} while (current);
|
|
}
|
|
|
|
__detectThis() {
|
|
this.thisFound = true;
|
|
}
|
|
|
|
__isClosed() {
|
|
return this.__left === null;
|
|
}
|
|
|
|
/**
|
|
* returns resolved {Reference}
|
|
* @function Scope#resolve
|
|
* @param {Espree.Identifier} ident identifier to be resolved.
|
|
* @returns {Reference} reference
|
|
*/
|
|
resolve(ident) {
|
|
let ref, i, iz;
|
|
|
|
assert__default["default"](this.__isClosed(), "Scope should be closed.");
|
|
assert__default["default"](ident.type === Syntax$2.Identifier, "Target should be identifier.");
|
|
for (i = 0, iz = this.references.length; i < iz; ++i) {
|
|
ref = this.references[i];
|
|
if (ref.identifier === ident) {
|
|
return ref;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* returns this scope is static
|
|
* @function Scope#isStatic
|
|
* @returns {boolean} static
|
|
*/
|
|
isStatic() {
|
|
return !this.dynamic;
|
|
}
|
|
|
|
/**
|
|
* returns this scope has materialized arguments
|
|
* @function Scope#isArgumentsMaterialized
|
|
* @returns {boolean} arguemnts materialized
|
|
*/
|
|
isArgumentsMaterialized() { // eslint-disable-line class-methods-use-this
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* returns this scope has materialized `this` reference
|
|
* @function Scope#isThisMaterialized
|
|
* @returns {boolean} this materialized
|
|
*/
|
|
isThisMaterialized() { // eslint-disable-line class-methods-use-this
|
|
return true;
|
|
}
|
|
|
|
isUsedName(name) {
|
|
if (this.set.has(name)) {
|
|
return true;
|
|
}
|
|
for (let i = 0, iz = this.through.length; i < iz; ++i) {
|
|
if (this.through[i].identifier.name === name) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
|
|
class GlobalScope extends Scope {
|
|
constructor(scopeManager, block) {
|
|
super(scopeManager, "global", null, block, false);
|
|
this.implicit = {
|
|
set: new Map(),
|
|
variables: [],
|
|
|
|
/**
|
|
* List of {@link Reference}s that are left to be resolved (i.e. which
|
|
* need to be linked to the variable they refer to).
|
|
* @member {Reference[]} Scope#implicit#left
|
|
*/
|
|
left: []
|
|
};
|
|
}
|
|
|
|
__close(scopeManager) {
|
|
const implicit = [];
|
|
|
|
for (let i = 0, iz = this.__left.length; i < iz; ++i) {
|
|
const ref = this.__left[i];
|
|
|
|
if (ref.__maybeImplicitGlobal && !this.set.has(ref.identifier.name)) {
|
|
implicit.push(ref.__maybeImplicitGlobal);
|
|
}
|
|
}
|
|
|
|
// create an implicit global variable from assignment expression
|
|
for (let i = 0, iz = implicit.length; i < iz; ++i) {
|
|
const info = implicit[i];
|
|
|
|
this.__defineImplicit(info.pattern,
|
|
new Definition(
|
|
Variable.ImplicitGlobalVariable,
|
|
info.pattern,
|
|
info.node,
|
|
null,
|
|
null,
|
|
null
|
|
));
|
|
|
|
}
|
|
|
|
this.implicit.left = this.__left;
|
|
|
|
return super.__close(scopeManager);
|
|
}
|
|
|
|
__defineImplicit(node, def) {
|
|
if (node && node.type === Syntax$2.Identifier) {
|
|
this.__defineGeneric(
|
|
node.name,
|
|
this.implicit.set,
|
|
this.implicit.variables,
|
|
node,
|
|
def
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
class ModuleScope extends Scope {
|
|
constructor(scopeManager, upperScope, block) {
|
|
super(scopeManager, "module", upperScope, block, false);
|
|
}
|
|
}
|
|
|
|
class FunctionExpressionNameScope extends Scope {
|
|
constructor(scopeManager, upperScope, block) {
|
|
super(scopeManager, "function-expression-name", upperScope, block, false);
|
|
this.__define(block.id,
|
|
new Definition(
|
|
Variable.FunctionName,
|
|
block.id,
|
|
block,
|
|
null,
|
|
null,
|
|
null
|
|
));
|
|
this.functionExpressionScope = true;
|
|
}
|
|
}
|
|
|
|
class CatchScope extends Scope {
|
|
constructor(scopeManager, upperScope, block) {
|
|
super(scopeManager, "catch", upperScope, block, false);
|
|
}
|
|
}
|
|
|
|
class WithScope extends Scope {
|
|
constructor(scopeManager, upperScope, block) {
|
|
super(scopeManager, "with", upperScope, block, false);
|
|
}
|
|
|
|
__close(scopeManager) {
|
|
if (this.__shouldStaticallyClose(scopeManager)) {
|
|
return super.__close(scopeManager);
|
|
}
|
|
|
|
for (let i = 0, iz = this.__left.length; i < iz; ++i) {
|
|
const ref = this.__left[i];
|
|
|
|
ref.tainted = true;
|
|
this.__delegateToUpperScope(ref);
|
|
}
|
|
this.__left = null;
|
|
|
|
return this.upper;
|
|
}
|
|
}
|
|
|
|
class BlockScope extends Scope {
|
|
constructor(scopeManager, upperScope, block) {
|
|
super(scopeManager, "block", upperScope, block, false);
|
|
}
|
|
}
|
|
|
|
class SwitchScope extends Scope {
|
|
constructor(scopeManager, upperScope, block) {
|
|
super(scopeManager, "switch", upperScope, block, false);
|
|
}
|
|
}
|
|
|
|
class FunctionScope extends Scope {
|
|
constructor(scopeManager, upperScope, block, isMethodDefinition) {
|
|
super(scopeManager, "function", upperScope, block, isMethodDefinition);
|
|
|
|
// section 9.2.13, FunctionDeclarationInstantiation.
|
|
// NOTE Arrow functions never have an arguments objects.
|
|
if (this.block.type !== Syntax$2.ArrowFunctionExpression) {
|
|
this.__defineArguments();
|
|
}
|
|
}
|
|
|
|
isArgumentsMaterialized() {
|
|
|
|
// TODO(Constellation)
|
|
// We can more aggressive on this condition like this.
|
|
//
|
|
// function t() {
|
|
// // arguments of t is always hidden.
|
|
// function arguments() {
|
|
// }
|
|
// }
|
|
if (this.block.type === Syntax$2.ArrowFunctionExpression) {
|
|
return false;
|
|
}
|
|
|
|
if (!this.isStatic()) {
|
|
return true;
|
|
}
|
|
|
|
const variable = this.set.get("arguments");
|
|
|
|
assert__default["default"](variable, "Always have arguments variable.");
|
|
return variable.tainted || variable.references.length !== 0;
|
|
}
|
|
|
|
isThisMaterialized() {
|
|
if (!this.isStatic()) {
|
|
return true;
|
|
}
|
|
return this.thisFound;
|
|
}
|
|
|
|
__defineArguments() {
|
|
this.__defineGeneric(
|
|
"arguments",
|
|
this.set,
|
|
this.variables,
|
|
null,
|
|
null
|
|
);
|
|
this.taints.set("arguments", true);
|
|
}
|
|
|
|
// References in default parameters isn't resolved to variables which are in their function body.
|
|
// const x = 1
|
|
// function f(a = x) { // This `x` is resolved to the `x` in the outer scope.
|
|
// const x = 2
|
|
// console.log(a)
|
|
// }
|
|
__isValidResolution(ref, variable) {
|
|
|
|
// If `options.nodejsScope` is true, `this.block` becomes a Program node.
|
|
if (this.block.type === "Program") {
|
|
return true;
|
|
}
|
|
|
|
const bodyStart = this.block.body.range[0];
|
|
|
|
// It's invalid resolution in the following case:
|
|
return !(
|
|
variable.scope === this &&
|
|
ref.identifier.range[0] < bodyStart && // the reference is in the parameter part.
|
|
variable.defs.every(d => d.name.range[0] >= bodyStart) // the variable is in the body.
|
|
);
|
|
}
|
|
}
|
|
|
|
class ForScope extends Scope {
|
|
constructor(scopeManager, upperScope, block) {
|
|
super(scopeManager, "for", upperScope, block, false);
|
|
}
|
|
}
|
|
|
|
class ClassScope extends Scope {
|
|
constructor(scopeManager, upperScope, block) {
|
|
super(scopeManager, "class", upperScope, block, false);
|
|
}
|
|
}
|
|
|
|
class ClassFieldInitializerScope extends Scope {
|
|
constructor(scopeManager, upperScope, block) {
|
|
super(scopeManager, "class-field-initializer", upperScope, block, true);
|
|
}
|
|
}
|
|
|
|
class ClassStaticBlockScope extends Scope {
|
|
constructor(scopeManager, upperScope, block) {
|
|
super(scopeManager, "class-static-block", upperScope, block, true);
|
|
}
|
|
}
|
|
|
|
/* vim: set sw=4 ts=4 et tw=80 : */
|
|
|
|
/*
|
|
Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
|
|
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/**
|
|
* @constructor ScopeManager
|
|
*/
|
|
class ScopeManager {
|
|
constructor(options) {
|
|
this.scopes = [];
|
|
this.globalScope = null;
|
|
this.__nodeToScope = new WeakMap();
|
|
this.__currentScope = null;
|
|
this.__options = options;
|
|
this.__declaredVariables = new WeakMap();
|
|
}
|
|
|
|
__useDirective() {
|
|
return this.__options.directive;
|
|
}
|
|
|
|
__isOptimistic() {
|
|
return this.__options.optimistic;
|
|
}
|
|
|
|
__ignoreEval() {
|
|
return this.__options.ignoreEval;
|
|
}
|
|
|
|
isGlobalReturn() {
|
|
return this.__options.nodejsScope || this.__options.sourceType === "commonjs";
|
|
}
|
|
|
|
isModule() {
|
|
return this.__options.sourceType === "module";
|
|
}
|
|
|
|
isImpliedStrict() {
|
|
return this.__options.impliedStrict;
|
|
}
|
|
|
|
isStrictModeSupported() {
|
|
return this.__options.ecmaVersion >= 5;
|
|
}
|
|
|
|
// Returns appropriate scope for this node.
|
|
__get(node) {
|
|
return this.__nodeToScope.get(node);
|
|
}
|
|
|
|
/**
|
|
* Get variables that are declared by the node.
|
|
*
|
|
* "are declared by the node" means the node is same as `Variable.defs[].node` or `Variable.defs[].parent`.
|
|
* If the node declares nothing, this method returns an empty array.
|
|
* CAUTION: This API is experimental. See https://github.com/estools/escope/pull/69 for more details.
|
|
* @param {Espree.Node} node a node to get.
|
|
* @returns {Variable[]} variables that declared by the node.
|
|
*/
|
|
getDeclaredVariables(node) {
|
|
return this.__declaredVariables.get(node) || [];
|
|
}
|
|
|
|
/**
|
|
* acquire scope from node.
|
|
* @function ScopeManager#acquire
|
|
* @param {Espree.Node} node node for the acquired scope.
|
|
* @param {?boolean} [inner=false] look up the most inner scope, default value is false.
|
|
* @returns {Scope?} Scope from node
|
|
*/
|
|
acquire(node, inner) {
|
|
|
|
/**
|
|
* predicate
|
|
* @param {Scope} testScope scope to test
|
|
* @returns {boolean} predicate
|
|
*/
|
|
function predicate(testScope) {
|
|
if (testScope.type === "function" && testScope.functionExpressionScope) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
const scopes = this.__get(node);
|
|
|
|
if (!scopes || scopes.length === 0) {
|
|
return null;
|
|
}
|
|
|
|
// Heuristic selection from all scopes.
|
|
// If you would like to get all scopes, please use ScopeManager#acquireAll.
|
|
if (scopes.length === 1) {
|
|
return scopes[0];
|
|
}
|
|
|
|
if (inner) {
|
|
for (let i = scopes.length - 1; i >= 0; --i) {
|
|
const scope = scopes[i];
|
|
|
|
if (predicate(scope)) {
|
|
return scope;
|
|
}
|
|
}
|
|
} else {
|
|
for (let i = 0, iz = scopes.length; i < iz; ++i) {
|
|
const scope = scopes[i];
|
|
|
|
if (predicate(scope)) {
|
|
return scope;
|
|
}
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* acquire all scopes from node.
|
|
* @function ScopeManager#acquireAll
|
|
* @param {Espree.Node} node node for the acquired scope.
|
|
* @returns {Scopes?} Scope array
|
|
*/
|
|
acquireAll(node) {
|
|
return this.__get(node);
|
|
}
|
|
|
|
/**
|
|
* release the node.
|
|
* @function ScopeManager#release
|
|
* @param {Espree.Node} node releasing node.
|
|
* @param {?boolean} [inner=false] look up the most inner scope, default value is false.
|
|
* @returns {Scope?} upper scope for the node.
|
|
*/
|
|
release(node, inner) {
|
|
const scopes = this.__get(node);
|
|
|
|
if (scopes && scopes.length) {
|
|
const scope = scopes[0].upper;
|
|
|
|
if (!scope) {
|
|
return null;
|
|
}
|
|
return this.acquire(scope.block, inner);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
attach() { } // eslint-disable-line class-methods-use-this
|
|
|
|
detach() { } // eslint-disable-line class-methods-use-this
|
|
|
|
__nestScope(scope) {
|
|
if (scope instanceof GlobalScope) {
|
|
assert__default["default"](this.__currentScope === null);
|
|
this.globalScope = scope;
|
|
}
|
|
this.__currentScope = scope;
|
|
return scope;
|
|
}
|
|
|
|
__nestGlobalScope(node) {
|
|
return this.__nestScope(new GlobalScope(this, node));
|
|
}
|
|
|
|
__nestBlockScope(node) {
|
|
return this.__nestScope(new BlockScope(this, this.__currentScope, node));
|
|
}
|
|
|
|
__nestFunctionScope(node, isMethodDefinition) {
|
|
return this.__nestScope(new FunctionScope(this, this.__currentScope, node, isMethodDefinition));
|
|
}
|
|
|
|
__nestForScope(node) {
|
|
return this.__nestScope(new ForScope(this, this.__currentScope, node));
|
|
}
|
|
|
|
__nestCatchScope(node) {
|
|
return this.__nestScope(new CatchScope(this, this.__currentScope, node));
|
|
}
|
|
|
|
__nestWithScope(node) {
|
|
return this.__nestScope(new WithScope(this, this.__currentScope, node));
|
|
}
|
|
|
|
__nestClassScope(node) {
|
|
return this.__nestScope(new ClassScope(this, this.__currentScope, node));
|
|
}
|
|
|
|
__nestClassFieldInitializerScope(node) {
|
|
return this.__nestScope(new ClassFieldInitializerScope(this, this.__currentScope, node));
|
|
}
|
|
|
|
__nestClassStaticBlockScope(node) {
|
|
return this.__nestScope(new ClassStaticBlockScope(this, this.__currentScope, node));
|
|
}
|
|
|
|
__nestSwitchScope(node) {
|
|
return this.__nestScope(new SwitchScope(this, this.__currentScope, node));
|
|
}
|
|
|
|
__nestModuleScope(node) {
|
|
return this.__nestScope(new ModuleScope(this, this.__currentScope, node));
|
|
}
|
|
|
|
__nestFunctionExpressionNameScope(node) {
|
|
return this.__nestScope(new FunctionExpressionNameScope(this, this.__currentScope, node));
|
|
}
|
|
|
|
__isES6() {
|
|
return this.__options.ecmaVersion >= 6;
|
|
}
|
|
}
|
|
|
|
/* vim: set sw=4 ts=4 et tw=80 : */
|
|
|
|
/*
|
|
Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
|
|
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
const { Syntax: Syntax$1 } = estraverse__default["default"];
|
|
|
|
/**
|
|
* Get last array element
|
|
* @param {Array} xs array
|
|
* @returns {any} Last elment
|
|
*/
|
|
function getLast(xs) {
|
|
return xs[xs.length - 1] || null;
|
|
}
|
|
|
|
class PatternVisitor extends esrecurse__default["default"].Visitor {
|
|
static isPattern(node) {
|
|
const nodeType = node.type;
|
|
|
|
return (
|
|
nodeType === Syntax$1.Identifier ||
|
|
nodeType === Syntax$1.ObjectPattern ||
|
|
nodeType === Syntax$1.ArrayPattern ||
|
|
nodeType === Syntax$1.SpreadElement ||
|
|
nodeType === Syntax$1.RestElement ||
|
|
nodeType === Syntax$1.AssignmentPattern
|
|
);
|
|
}
|
|
|
|
constructor(options, rootPattern, callback) {
|
|
super(null, options);
|
|
this.rootPattern = rootPattern;
|
|
this.callback = callback;
|
|
this.assignments = [];
|
|
this.rightHandNodes = [];
|
|
this.restElements = [];
|
|
}
|
|
|
|
Identifier(pattern) {
|
|
const lastRestElement = getLast(this.restElements);
|
|
|
|
this.callback(pattern, {
|
|
topLevel: pattern === this.rootPattern,
|
|
rest: lastRestElement !== null && lastRestElement !== undefined && lastRestElement.argument === pattern,
|
|
assignments: this.assignments
|
|
});
|
|
}
|
|
|
|
Property(property) {
|
|
|
|
// Computed property's key is a right hand node.
|
|
if (property.computed) {
|
|
this.rightHandNodes.push(property.key);
|
|
}
|
|
|
|
// If it's shorthand, its key is same as its value.
|
|
// If it's shorthand and has its default value, its key is same as its value.left (the value is AssignmentPattern).
|
|
// If it's not shorthand, the name of new variable is its value's.
|
|
this.visit(property.value);
|
|
}
|
|
|
|
ArrayPattern(pattern) {
|
|
for (let i = 0, iz = pattern.elements.length; i < iz; ++i) {
|
|
const element = pattern.elements[i];
|
|
|
|
this.visit(element);
|
|
}
|
|
}
|
|
|
|
AssignmentPattern(pattern) {
|
|
this.assignments.push(pattern);
|
|
this.visit(pattern.left);
|
|
this.rightHandNodes.push(pattern.right);
|
|
this.assignments.pop();
|
|
}
|
|
|
|
RestElement(pattern) {
|
|
this.restElements.push(pattern);
|
|
this.visit(pattern.argument);
|
|
this.restElements.pop();
|
|
}
|
|
|
|
MemberExpression(node) {
|
|
|
|
// Computed property's key is a right hand node.
|
|
if (node.computed) {
|
|
this.rightHandNodes.push(node.property);
|
|
}
|
|
|
|
// the object is only read, write to its property.
|
|
this.rightHandNodes.push(node.object);
|
|
}
|
|
|
|
//
|
|
// ForInStatement.left and AssignmentExpression.left are LeftHandSideExpression.
|
|
// By spec, LeftHandSideExpression is Pattern or MemberExpression.
|
|
// (see also: https://github.com/estree/estree/pull/20#issuecomment-74584758)
|
|
// But espree 2.0 parses to ArrayExpression, ObjectExpression, etc...
|
|
//
|
|
|
|
SpreadElement(node) {
|
|
this.visit(node.argument);
|
|
}
|
|
|
|
ArrayExpression(node) {
|
|
node.elements.forEach(this.visit, this);
|
|
}
|
|
|
|
AssignmentExpression(node) {
|
|
this.assignments.push(node);
|
|
this.visit(node.left);
|
|
this.rightHandNodes.push(node.right);
|
|
this.assignments.pop();
|
|
}
|
|
|
|
CallExpression(node) {
|
|
|
|
// arguments are right hand nodes.
|
|
node.arguments.forEach(a => {
|
|
this.rightHandNodes.push(a);
|
|
});
|
|
this.visit(node.callee);
|
|
}
|
|
}
|
|
|
|
/* vim: set sw=4 ts=4 et tw=80 : */
|
|
|
|
/*
|
|
Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
|
|
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
const { Syntax } = estraverse__default["default"];
|
|
|
|
/**
|
|
* Traverse identifier in pattern
|
|
* @param {Object} options options
|
|
* @param {pattern} rootPattern root pattern
|
|
* @param {Refencer} referencer referencer
|
|
* @param {callback} callback callback
|
|
* @returns {void}
|
|
*/
|
|
function traverseIdentifierInPattern(options, rootPattern, referencer, callback) {
|
|
|
|
// Call the callback at left hand identifier nodes, and Collect right hand nodes.
|
|
const visitor = new PatternVisitor(options, rootPattern, callback);
|
|
|
|
visitor.visit(rootPattern);
|
|
|
|
// Process the right hand nodes recursively.
|
|
if (referencer !== null && referencer !== undefined) {
|
|
visitor.rightHandNodes.forEach(referencer.visit, referencer);
|
|
}
|
|
}
|
|
|
|
// Importing ImportDeclaration.
|
|
// http://people.mozilla.org/~jorendorff/es6-draft.html#sec-moduledeclarationinstantiation
|
|
// https://github.com/estree/estree/blob/master/es6.md#importdeclaration
|
|
// FIXME: Now, we don't create module environment, because the context is
|
|
// implementation dependent.
|
|
|
|
class Importer extends esrecurse__default["default"].Visitor {
|
|
constructor(declaration, referencer) {
|
|
super(null, referencer.options);
|
|
this.declaration = declaration;
|
|
this.referencer = referencer;
|
|
}
|
|
|
|
visitImport(id, specifier) {
|
|
this.referencer.visitPattern(id, pattern => {
|
|
this.referencer.currentScope().__define(pattern,
|
|
new Definition(
|
|
Variable.ImportBinding,
|
|
pattern,
|
|
specifier,
|
|
this.declaration,
|
|
null,
|
|
null
|
|
));
|
|
});
|
|
}
|
|
|
|
ImportNamespaceSpecifier(node) {
|
|
const local = (node.local || node.id);
|
|
|
|
if (local) {
|
|
this.visitImport(local, node);
|
|
}
|
|
}
|
|
|
|
ImportDefaultSpecifier(node) {
|
|
const local = (node.local || node.id);
|
|
|
|
this.visitImport(local, node);
|
|
}
|
|
|
|
ImportSpecifier(node) {
|
|
const local = (node.local || node.id);
|
|
|
|
if (node.name) {
|
|
this.visitImport(node.name, node);
|
|
} else {
|
|
this.visitImport(local, node);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Referencing variables and creating bindings.
|
|
class Referencer extends esrecurse__default["default"].Visitor {
|
|
constructor(options, scopeManager) {
|
|
super(null, options);
|
|
this.options = options;
|
|
this.scopeManager = scopeManager;
|
|
this.parent = null;
|
|
this.isInnerMethodDefinition = false;
|
|
}
|
|
|
|
currentScope() {
|
|
return this.scopeManager.__currentScope;
|
|
}
|
|
|
|
close(node) {
|
|
while (this.currentScope() && node === this.currentScope().block) {
|
|
this.scopeManager.__currentScope = this.currentScope().__close(this.scopeManager);
|
|
}
|
|
}
|
|
|
|
pushInnerMethodDefinition(isInnerMethodDefinition) {
|
|
const previous = this.isInnerMethodDefinition;
|
|
|
|
this.isInnerMethodDefinition = isInnerMethodDefinition;
|
|
return previous;
|
|
}
|
|
|
|
popInnerMethodDefinition(isInnerMethodDefinition) {
|
|
this.isInnerMethodDefinition = isInnerMethodDefinition;
|
|
}
|
|
|
|
referencingDefaultValue(pattern, assignments, maybeImplicitGlobal, init) {
|
|
const scope = this.currentScope();
|
|
|
|
assignments.forEach(assignment => {
|
|
scope.__referencing(
|
|
pattern,
|
|
Reference.WRITE,
|
|
assignment.right,
|
|
maybeImplicitGlobal,
|
|
pattern !== assignment.left,
|
|
init
|
|
);
|
|
});
|
|
}
|
|
|
|
visitPattern(node, options, callback) {
|
|
let visitPatternOptions = options;
|
|
let visitPatternCallback = callback;
|
|
|
|
if (typeof options === "function") {
|
|
visitPatternCallback = options;
|
|
visitPatternOptions = { processRightHandNodes: false };
|
|
}
|
|
|
|
traverseIdentifierInPattern(
|
|
this.options,
|
|
node,
|
|
visitPatternOptions.processRightHandNodes ? this : null,
|
|
visitPatternCallback
|
|
);
|
|
}
|
|
|
|
visitFunction(node) {
|
|
let i, iz;
|
|
|
|
// FunctionDeclaration name is defined in upper scope
|
|
// NOTE: Not referring variableScope. It is intended.
|
|
// Since
|
|
// in ES5, FunctionDeclaration should be in FunctionBody.
|
|
// in ES6, FunctionDeclaration should be block scoped.
|
|
|
|
if (node.type === Syntax.FunctionDeclaration) {
|
|
|
|
// id is defined in upper scope
|
|
this.currentScope().__define(node.id,
|
|
new Definition(
|
|
Variable.FunctionName,
|
|
node.id,
|
|
node,
|
|
null,
|
|
null,
|
|
null
|
|
));
|
|
}
|
|
|
|
// FunctionExpression with name creates its special scope;
|
|
// FunctionExpressionNameScope.
|
|
if (node.type === Syntax.FunctionExpression && node.id) {
|
|
this.scopeManager.__nestFunctionExpressionNameScope(node);
|
|
}
|
|
|
|
// Consider this function is in the MethodDefinition.
|
|
this.scopeManager.__nestFunctionScope(node, this.isInnerMethodDefinition);
|
|
|
|
const that = this;
|
|
|
|
/**
|
|
* Visit pattern callback
|
|
* @param {pattern} pattern pattern
|
|
* @param {Object} info info
|
|
* @returns {void}
|
|
*/
|
|
function visitPatternCallback(pattern, info) {
|
|
that.currentScope().__define(pattern,
|
|
new ParameterDefinition(
|
|
pattern,
|
|
node,
|
|
i,
|
|
info.rest
|
|
));
|
|
|
|
that.referencingDefaultValue(pattern, info.assignments, null, true);
|
|
}
|
|
|
|
// Process parameter declarations.
|
|
for (i = 0, iz = node.params.length; i < iz; ++i) {
|
|
this.visitPattern(node.params[i], { processRightHandNodes: true }, visitPatternCallback);
|
|
}
|
|
|
|
// if there's a rest argument, add that
|
|
if (node.rest) {
|
|
this.visitPattern({
|
|
type: "RestElement",
|
|
argument: node.rest
|
|
}, pattern => {
|
|
this.currentScope().__define(pattern,
|
|
new ParameterDefinition(
|
|
pattern,
|
|
node,
|
|
node.params.length,
|
|
true
|
|
));
|
|
});
|
|
}
|
|
|
|
// In TypeScript there are a number of function-like constructs which have no body,
|
|
// so check it exists before traversing
|
|
if (node.body) {
|
|
|
|
// Skip BlockStatement to prevent creating BlockStatement scope.
|
|
if (node.body.type === Syntax.BlockStatement) {
|
|
this.visitChildren(node.body);
|
|
} else {
|
|
this.visit(node.body);
|
|
}
|
|
}
|
|
|
|
this.close(node);
|
|
}
|
|
|
|
visitClass(node) {
|
|
if (node.type === Syntax.ClassDeclaration) {
|
|
this.currentScope().__define(node.id,
|
|
new Definition(
|
|
Variable.ClassName,
|
|
node.id,
|
|
node,
|
|
null,
|
|
null,
|
|
null
|
|
));
|
|
}
|
|
|
|
this.visit(node.superClass);
|
|
|
|
this.scopeManager.__nestClassScope(node);
|
|
|
|
if (node.id) {
|
|
this.currentScope().__define(node.id,
|
|
new Definition(
|
|
Variable.ClassName,
|
|
node.id,
|
|
node
|
|
));
|
|
}
|
|
this.visit(node.body);
|
|
|
|
this.close(node);
|
|
}
|
|
|
|
visitProperty(node) {
|
|
let previous;
|
|
|
|
if (node.computed) {
|
|
this.visit(node.key);
|
|
}
|
|
|
|
const isMethodDefinition = node.type === Syntax.MethodDefinition;
|
|
|
|
if (isMethodDefinition) {
|
|
previous = this.pushInnerMethodDefinition(true);
|
|
}
|
|
this.visit(node.value);
|
|
if (isMethodDefinition) {
|
|
this.popInnerMethodDefinition(previous);
|
|
}
|
|
}
|
|
|
|
visitForIn(node) {
|
|
if (node.left.type === Syntax.VariableDeclaration && node.left.kind !== "var") {
|
|
this.scopeManager.__nestForScope(node);
|
|
}
|
|
|
|
if (node.left.type === Syntax.VariableDeclaration) {
|
|
this.visit(node.left);
|
|
this.visitPattern(node.left.declarations[0].id, pattern => {
|
|
this.currentScope().__referencing(pattern, Reference.WRITE, node.right, null, true, true);
|
|
});
|
|
} else {
|
|
this.visitPattern(node.left, { processRightHandNodes: true }, (pattern, info) => {
|
|
let maybeImplicitGlobal = null;
|
|
|
|
if (!this.currentScope().isStrict) {
|
|
maybeImplicitGlobal = {
|
|
pattern,
|
|
node
|
|
};
|
|
}
|
|
this.referencingDefaultValue(pattern, info.assignments, maybeImplicitGlobal, false);
|
|
this.currentScope().__referencing(pattern, Reference.WRITE, node.right, maybeImplicitGlobal, true, false);
|
|
});
|
|
}
|
|
this.visit(node.right);
|
|
this.visit(node.body);
|
|
|
|
this.close(node);
|
|
}
|
|
|
|
visitVariableDeclaration(variableTargetScope, type, node, index) {
|
|
|
|
const decl = node.declarations[index];
|
|
const init = decl.init;
|
|
|
|
this.visitPattern(decl.id, { processRightHandNodes: true }, (pattern, info) => {
|
|
variableTargetScope.__define(
|
|
pattern,
|
|
new Definition(
|
|
type,
|
|
pattern,
|
|
decl,
|
|
node,
|
|
index,
|
|
node.kind
|
|
)
|
|
);
|
|
|
|
this.referencingDefaultValue(pattern, info.assignments, null, true);
|
|
if (init) {
|
|
this.currentScope().__referencing(pattern, Reference.WRITE, init, null, !info.topLevel, true);
|
|
}
|
|
});
|
|
}
|
|
|
|
AssignmentExpression(node) {
|
|
if (PatternVisitor.isPattern(node.left)) {
|
|
if (node.operator === "=") {
|
|
this.visitPattern(node.left, { processRightHandNodes: true }, (pattern, info) => {
|
|
let maybeImplicitGlobal = null;
|
|
|
|
if (!this.currentScope().isStrict) {
|
|
maybeImplicitGlobal = {
|
|
pattern,
|
|
node
|
|
};
|
|
}
|
|
this.referencingDefaultValue(pattern, info.assignments, maybeImplicitGlobal, false);
|
|
this.currentScope().__referencing(pattern, Reference.WRITE, node.right, maybeImplicitGlobal, !info.topLevel, false);
|
|
});
|
|
} else {
|
|
this.currentScope().__referencing(node.left, Reference.RW, node.right);
|
|
}
|
|
} else {
|
|
this.visit(node.left);
|
|
}
|
|
this.visit(node.right);
|
|
}
|
|
|
|
CatchClause(node) {
|
|
this.scopeManager.__nestCatchScope(node);
|
|
|
|
this.visitPattern(node.param, { processRightHandNodes: true }, (pattern, info) => {
|
|
this.currentScope().__define(pattern,
|
|
new Definition(
|
|
Variable.CatchClause,
|
|
node.param,
|
|
node,
|
|
null,
|
|
null,
|
|
null
|
|
));
|
|
this.referencingDefaultValue(pattern, info.assignments, null, true);
|
|
});
|
|
this.visit(node.body);
|
|
|
|
this.close(node);
|
|
}
|
|
|
|
Program(node) {
|
|
this.scopeManager.__nestGlobalScope(node);
|
|
|
|
if (this.scopeManager.isGlobalReturn()) {
|
|
|
|
// Force strictness of GlobalScope to false when using node.js scope.
|
|
this.currentScope().isStrict = false;
|
|
this.scopeManager.__nestFunctionScope(node, false);
|
|
}
|
|
|
|
if (this.scopeManager.__isES6() && this.scopeManager.isModule()) {
|
|
this.scopeManager.__nestModuleScope(node);
|
|
}
|
|
|
|
if (this.scopeManager.isStrictModeSupported() && this.scopeManager.isImpliedStrict()) {
|
|
this.currentScope().isStrict = true;
|
|
}
|
|
|
|
this.visitChildren(node);
|
|
this.close(node);
|
|
}
|
|
|
|
Identifier(node) {
|
|
this.currentScope().__referencing(node);
|
|
}
|
|
|
|
// eslint-disable-next-line class-methods-use-this
|
|
PrivateIdentifier() {
|
|
|
|
// Do nothing.
|
|
}
|
|
|
|
UpdateExpression(node) {
|
|
if (PatternVisitor.isPattern(node.argument)) {
|
|
this.currentScope().__referencing(node.argument, Reference.RW, null);
|
|
} else {
|
|
this.visitChildren(node);
|
|
}
|
|
}
|
|
|
|
MemberExpression(node) {
|
|
this.visit(node.object);
|
|
if (node.computed) {
|
|
this.visit(node.property);
|
|
}
|
|
}
|
|
|
|
Property(node) {
|
|
this.visitProperty(node);
|
|
}
|
|
|
|
PropertyDefinition(node) {
|
|
const { computed, key, value } = node;
|
|
|
|
if (computed) {
|
|
this.visit(key);
|
|
}
|
|
if (value) {
|
|
this.scopeManager.__nestClassFieldInitializerScope(value);
|
|
this.visit(value);
|
|
this.close(value);
|
|
}
|
|
}
|
|
|
|
StaticBlock(node) {
|
|
this.scopeManager.__nestClassStaticBlockScope(node);
|
|
|
|
this.visitChildren(node);
|
|
|
|
this.close(node);
|
|
}
|
|
|
|
MethodDefinition(node) {
|
|
this.visitProperty(node);
|
|
}
|
|
|
|
BreakStatement() {} // eslint-disable-line class-methods-use-this
|
|
|
|
ContinueStatement() {} // eslint-disable-line class-methods-use-this
|
|
|
|
LabeledStatement(node) {
|
|
this.visit(node.body);
|
|
}
|
|
|
|
ForStatement(node) {
|
|
|
|
// Create ForStatement declaration.
|
|
// NOTE: In ES6, ForStatement dynamically generates
|
|
// per iteration environment. However, escope is
|
|
// a static analyzer, we only generate one scope for ForStatement.
|
|
if (node.init && node.init.type === Syntax.VariableDeclaration && node.init.kind !== "var") {
|
|
this.scopeManager.__nestForScope(node);
|
|
}
|
|
|
|
this.visitChildren(node);
|
|
|
|
this.close(node);
|
|
}
|
|
|
|
ClassExpression(node) {
|
|
this.visitClass(node);
|
|
}
|
|
|
|
ClassDeclaration(node) {
|
|
this.visitClass(node);
|
|
}
|
|
|
|
CallExpression(node) {
|
|
|
|
// Check this is direct call to eval
|
|
if (!this.scopeManager.__ignoreEval() && node.callee.type === Syntax.Identifier && node.callee.name === "eval") {
|
|
|
|
// NOTE: This should be `variableScope`. Since direct eval call always creates Lexical environment and
|
|
// let / const should be enclosed into it. Only VariableDeclaration affects on the caller's environment.
|
|
this.currentScope().variableScope.__detectEval();
|
|
}
|
|
this.visitChildren(node);
|
|
}
|
|
|
|
BlockStatement(node) {
|
|
if (this.scopeManager.__isES6()) {
|
|
this.scopeManager.__nestBlockScope(node);
|
|
}
|
|
|
|
this.visitChildren(node);
|
|
|
|
this.close(node);
|
|
}
|
|
|
|
ThisExpression() {
|
|
this.currentScope().variableScope.__detectThis();
|
|
}
|
|
|
|
WithStatement(node) {
|
|
this.visit(node.object);
|
|
|
|
// Then nest scope for WithStatement.
|
|
this.scopeManager.__nestWithScope(node);
|
|
|
|
this.visit(node.body);
|
|
|
|
this.close(node);
|
|
}
|
|
|
|
VariableDeclaration(node) {
|
|
const variableTargetScope = (node.kind === "var") ? this.currentScope().variableScope : this.currentScope();
|
|
|
|
for (let i = 0, iz = node.declarations.length; i < iz; ++i) {
|
|
const decl = node.declarations[i];
|
|
|
|
this.visitVariableDeclaration(variableTargetScope, Variable.Variable, node, i);
|
|
if (decl.init) {
|
|
this.visit(decl.init);
|
|
}
|
|
}
|
|
}
|
|
|
|
// sec 13.11.8
|
|
SwitchStatement(node) {
|
|
this.visit(node.discriminant);
|
|
|
|
if (this.scopeManager.__isES6()) {
|
|
this.scopeManager.__nestSwitchScope(node);
|
|
}
|
|
|
|
for (let i = 0, iz = node.cases.length; i < iz; ++i) {
|
|
this.visit(node.cases[i]);
|
|
}
|
|
|
|
this.close(node);
|
|
}
|
|
|
|
FunctionDeclaration(node) {
|
|
this.visitFunction(node);
|
|
}
|
|
|
|
FunctionExpression(node) {
|
|
this.visitFunction(node);
|
|
}
|
|
|
|
ForOfStatement(node) {
|
|
this.visitForIn(node);
|
|
}
|
|
|
|
ForInStatement(node) {
|
|
this.visitForIn(node);
|
|
}
|
|
|
|
ArrowFunctionExpression(node) {
|
|
this.visitFunction(node);
|
|
}
|
|
|
|
ImportDeclaration(node) {
|
|
assert__default["default"](this.scopeManager.__isES6() && this.scopeManager.isModule(), "ImportDeclaration should appear when the mode is ES6 and in the module context.");
|
|
|
|
const importer = new Importer(node, this);
|
|
|
|
importer.visit(node);
|
|
}
|
|
|
|
visitExportDeclaration(node) {
|
|
if (node.source) {
|
|
return;
|
|
}
|
|
if (node.declaration) {
|
|
this.visit(node.declaration);
|
|
return;
|
|
}
|
|
|
|
this.visitChildren(node);
|
|
}
|
|
|
|
// TODO: ExportDeclaration doesn't exist. for bc?
|
|
ExportDeclaration(node) {
|
|
this.visitExportDeclaration(node);
|
|
}
|
|
|
|
ExportAllDeclaration(node) {
|
|
this.visitExportDeclaration(node);
|
|
}
|
|
|
|
ExportDefaultDeclaration(node) {
|
|
this.visitExportDeclaration(node);
|
|
}
|
|
|
|
ExportNamedDeclaration(node) {
|
|
this.visitExportDeclaration(node);
|
|
}
|
|
|
|
ExportSpecifier(node) {
|
|
|
|
// TODO: `node.id` doesn't exist. for bc?
|
|
const local = (node.id || node.local);
|
|
|
|
this.visit(local);
|
|
}
|
|
|
|
MetaProperty() { // eslint-disable-line class-methods-use-this
|
|
|
|
// do nothing.
|
|
}
|
|
}
|
|
|
|
/* vim: set sw=4 ts=4 et tw=80 : */
|
|
|
|
const version = "7.2.2";
|
|
|
|
/*
|
|
Copyright (C) 2012-2014 Yusuke Suzuki <utatane.tea@gmail.com>
|
|
Copyright (C) 2013 Alex Seville <hi@alexanderseville.com>
|
|
Copyright (C) 2014 Thiago de Arruda <tpadilha84@gmail.com>
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
|
|
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/**
|
|
* Set the default options
|
|
* @returns {Object} options
|
|
*/
|
|
function defaultOptions() {
|
|
return {
|
|
optimistic: false,
|
|
directive: false,
|
|
nodejsScope: false,
|
|
impliedStrict: false,
|
|
sourceType: "script", // one of ['script', 'module', 'commonjs']
|
|
ecmaVersion: 5,
|
|
childVisitorKeys: null,
|
|
fallback: "iteration"
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Preform deep update on option object
|
|
* @param {Object} target Options
|
|
* @param {Object} override Updates
|
|
* @returns {Object} Updated options
|
|
*/
|
|
function updateDeeply(target, override) {
|
|
|
|
/**
|
|
* Is hash object
|
|
* @param {Object} value Test value
|
|
* @returns {boolean} Result
|
|
*/
|
|
function isHashObject(value) {
|
|
return typeof value === "object" && value instanceof Object && !(value instanceof Array) && !(value instanceof RegExp);
|
|
}
|
|
|
|
for (const key in override) {
|
|
if (Object.prototype.hasOwnProperty.call(override, key)) {
|
|
const val = override[key];
|
|
|
|
if (isHashObject(val)) {
|
|
if (isHashObject(target[key])) {
|
|
updateDeeply(target[key], val);
|
|
} else {
|
|
target[key] = updateDeeply({}, val);
|
|
}
|
|
} else {
|
|
target[key] = val;
|
|
}
|
|
}
|
|
}
|
|
return target;
|
|
}
|
|
|
|
/**
|
|
* Main interface function. Takes an Espree syntax tree and returns the
|
|
* analyzed scopes.
|
|
* @function analyze
|
|
* @param {espree.Tree} tree Abstract Syntax Tree
|
|
* @param {Object} providedOptions Options that tailor the scope analysis
|
|
* @param {boolean} [providedOptions.optimistic=false] the optimistic flag
|
|
* @param {boolean} [providedOptions.directive=false] the directive flag
|
|
* @param {boolean} [providedOptions.ignoreEval=false] whether to check 'eval()' calls
|
|
* @param {boolean} [providedOptions.nodejsScope=false] whether the whole
|
|
* script is executed under node.js environment. When enabled, escope adds
|
|
* a function scope immediately following the global scope.
|
|
* @param {boolean} [providedOptions.impliedStrict=false] implied strict mode
|
|
* (if ecmaVersion >= 5).
|
|
* @param {string} [providedOptions.sourceType='script'] the source type of the script. one of 'script', 'module', and 'commonjs'
|
|
* @param {number} [providedOptions.ecmaVersion=5] which ECMAScript version is considered
|
|
* @param {Object} [providedOptions.childVisitorKeys=null] Additional known visitor keys. See [esrecurse](https://github.com/estools/esrecurse)'s the `childVisitorKeys` option.
|
|
* @param {string} [providedOptions.fallback='iteration'] A kind of the fallback in order to encounter with unknown node. See [esrecurse](https://github.com/estools/esrecurse)'s the `fallback` option.
|
|
* @returns {ScopeManager} ScopeManager
|
|
*/
|
|
function analyze(tree, providedOptions) {
|
|
const options = updateDeeply(defaultOptions(), providedOptions);
|
|
const scopeManager = new ScopeManager(options);
|
|
const referencer = new Referencer(options, scopeManager);
|
|
|
|
referencer.visit(tree);
|
|
|
|
assert__default["default"](scopeManager.__currentScope === null, "currentScope should be null.");
|
|
|
|
return scopeManager;
|
|
}
|
|
|
|
/* vim: set sw=4 ts=4 et tw=80 : */
|
|
|
|
exports.Definition = Definition;
|
|
exports.PatternVisitor = PatternVisitor;
|
|
exports.Reference = Reference;
|
|
exports.Referencer = Referencer;
|
|
exports.Scope = Scope;
|
|
exports.ScopeManager = ScopeManager;
|
|
exports.Variable = Variable;
|
|
exports.analyze = analyze;
|
|
exports.version = version;
|
|
//# sourceMappingURL=eslint-scope.cjs.map
|