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node_modules/estree-walker/CHANGELOG.md

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+# changelog
+
+## 0.6.1
+
+* Only traverse nodes that exist and have a type ([#9](https://github.com/Rich-Harris/estree-walker/pull/9))
+* Only cache keys for nodes with a type ([#8](https://github.com/Rich-Harris/estree-walker/pull/8))
+
+## 0.6.0
+
+* Fix walker context type
+* Update deps, remove unncessary Bublé transformation
+
+## 0.5.2
+
+* Add types to package
+
+## 0.5.1
+
+* Prevent context corruption when `walk()` is called during a walk
+
+## 0.5.0
+
+* Export `childKeys`, for manually fixing in case of malformed ASTs
+
+## 0.4.0
+
+* Add TypeScript typings ([#3](https://github.com/Rich-Harris/estree-walker/pull/3))
+
+## 0.3.1
+
+* Include `pkg.repository` ([#2](https://github.com/Rich-Harris/estree-walker/pull/2))
+
+## 0.3.0
+
+* More predictable ordering
+
+## 0.2.1
+
+* Keep `context` shape
+
+## 0.2.0
+
+* Add ES6 build
+
+## 0.1.3
+
+* npm snafu
+
+## 0.1.2
+
+* Pass current prop and index to `enter`/`leave` callbacks
+
+## 0.1.1
+
+* First release

node_modules/estree-walker/README.md

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+# estree-walker
+
+Simple utility for walking an [ESTree](https://github.com/estree/estree)-compliant AST, such as one generated by [acorn](https://github.com/marijnh/acorn).
+
+
+## Installation
+
+```bash
+npm i estree-walker
+```
+
+
+## Usage
+
+```js
+var walk = require( 'estree-walker' ).walk;
+var acorn = require( 'acorn' );
+
+ast = acorn.parse( sourceCode, options ); // https://github.com/acornjs/acorn
+
+walk( ast, {
+  enter: function ( node, parent, prop, index ) {
+    // some code happens
+  },
+  leave: function ( node, parent, prop, index ) {
+  	// some code happens
+  }
+});
+```
+
+Inside the `enter` function, calling `this.skip()` will prevent the node's children being walked, or the `leave` function (which is optional) being called.
+
+
+## Why not use estraverse?
+
+The ESTree spec is evolving to accommodate ES6/7. I've had a couple of experiences where [estraverse](https://github.com/estools/estraverse) was unable to handle an AST generated by recent versions of acorn, because it hard-codes visitor keys.
+
+estree-walker, by contrast, simply enumerates a node's properties to find child nodes (and child lists of nodes), and is therefore resistant to spec changes. It's also much smaller. (The performance, if you're wondering, is basically identical.)
+
+None of which should be taken as criticism of estraverse, which has more features and has been battle-tested in many more situations, and for which I'm very grateful.
+
+
+## License
+
+MIT

node_modules/estree-walker/dist/estree-walker.umd.js

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+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+	typeof define === 'function' && define.amd ? define(['exports'], factory) :
+	(factory((global.estreeWalker = {})));
+}(this, (function (exports) { 'use strict';
+
+	function walk(ast, { enter, leave }) {
+		visit(ast, null, enter, leave);
+	}
+
+	let shouldSkip = false;
+	const context = { skip: () => shouldSkip = true };
+
+	const childKeys = {};
+
+	const toString = Object.prototype.toString;
+
+	function isArray(thing) {
+		return toString.call(thing) === '[object Array]';
+	}
+
+	function visit(node, parent, enter, leave, prop, index) {
+		if (!node) return;
+
+		if (enter) {
+			const _shouldSkip = shouldSkip;
+			shouldSkip = false;
+			enter.call(context, node, parent, prop, index);
+			const skipped = shouldSkip;
+			shouldSkip = _shouldSkip;
+
+			if (skipped) return;
+		}
+
+		const keys = node.type && childKeys[node.type] || (
+			childKeys[node.type] = Object.keys(node).filter(key => typeof node[key] === 'object')
+		);
+
+		for (let i = 0; i < keys.length; i += 1) {
+			const key = keys[i];
+			const value = node[key];
+
+			if (isArray(value)) {
+				for (let j = 0; j < value.length; j += 1) {
+					value[j] && value[j].type && visit(value[j], node, enter, leave, key, j);
+				}
+			}
+
+			else if (value && value.type) {
+				visit(value, node, enter, leave, key, null);
+			}
+		}
+
+		if (leave) {
+			leave(node, parent, prop, index);
+		}
+	}
+
+	exports.walk = walk;
+	exports.childKeys = childKeys;
+
+	Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
+//# sourceMappingURL=estree-walker.umd.js.map

node_modules/estree-walker/dist/estree-walker.umd.js.map

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node_modules/estree-walker/index.d.ts

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+declare module "estree-walker" {
+  export interface Node {
+    start: number;
+    end: number;
+    type: string;
+    [propName: string]: any;
+  }
+
+  export type WalkerContext = {
+    skip: () => void;
+  };
+
+  export type WalkerListener = (
+    this: WalkerContext,
+    node: Node,
+    parent?: Node,
+    prop?: string,
+    index?: number
+  ) => void;
+
+  export interface WalkerOptions {
+    enter?: WalkerListener;
+    leave?: WalkerListener;
+  }
+
+  export function walk(ast: Node, options: WalkerOptions): void;
+}

node_modules/estree-walker/package.json

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+{
+  "name": "estree-walker",
+  "description": "Traverse an ESTree-compliant AST",
+  "version": "0.6.1",
+  "author": "Rich Harris",
+  "license": "MIT",
+  "typings": "index.d.ts",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/Rich-Harris/estree-walker"
+  },
+  "main": "dist/estree-walker.umd.js",
+  "module": "src/estree-walker.js",
+  "scripts": {
+    "prepublishOnly": "npm test",
+    "build": "rollup -c",
+    "test": "mocha test/test.js",
+    "pretest": "npm run build"
+  },
+  "devDependencies": {
+    "mocha": "^5.2.0",
+    "rollup": "^0.67.3"
+  },
+  "files": [
+    "src",
+    "dist",
+    "index.d.ts",
+    "README.md"
+  ]
+}

node_modules/estree-walker/src/estree-walker.js

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+export function walk(ast, { enter, leave }) {
+	visit(ast, null, enter, leave);
+}
+
+let shouldSkip = false;
+const context = { skip: () => shouldSkip = true };
+
+export const childKeys = {};
+
+const toString = Object.prototype.toString;
+
+function isArray(thing) {
+	return toString.call(thing) === '[object Array]';
+}
+
+function visit(node, parent, enter, leave, prop, index) {
+	if (!node) return;
+
+	if (enter) {
+		const _shouldSkip = shouldSkip;
+		shouldSkip = false;
+		enter.call(context, node, parent, prop, index);
+		const skipped = shouldSkip;
+		shouldSkip = _shouldSkip;
+
+		if (skipped) return;
+	}
+
+	const keys = node.type && childKeys[node.type] || (
+		childKeys[node.type] = Object.keys(node).filter(key => typeof node[key] === 'object')
+	);
+
+	for (let i = 0; i < keys.length; i += 1) {
+		const key = keys[i];
+		const value = node[key];
+
+		if (isArray(value)) {
+			for (let j = 0; j < value.length; j += 1) {
+				value[j] && value[j].type && visit(value[j], node, enter, leave, key, j);
+			}
+		}
+
+		else if (value && value.type) {
+			visit(value, node, enter, leave, key, null);
+		}
+	}
+
+	if (leave) {
+		leave(node, parent, prop, index);
+	}
+}