Merge pull request webpack#8598 from kiliancs/acorn6

Upgrade acorn to v6

Author: sokra

lib/Parser.js

@@ -6,14 +6,17 @@
 
 // Syntax: https://developer.mozilla.org/en/SpiderMonkey/Parser_API
 
-const acorn = require("acorn-dynamic-import").default;
+const acorn = require("acorn");
+const acornDynamicImport = require("acorn-dynamic-import").default;
 const { Tapable, SyncBailHook, HookMap } = require("tapable");
 const util = require("util");
 const vm = require("vm");
 const BasicEvaluatedExpression = require("./BasicEvaluatedExpression");
 const StackedSetMap = require("./util/StackedSetMap");
 const TrackingSet = require("./util/TrackingSet");
 
+const acornParser = acorn.Parser.extend(acornDynamicImport);
+
 const joinRanges = (startRange, endRange) => {
 	if (!endRange) return startRange;
 	if (!startRange) return endRange;
@@ -25,10 +28,7 @@ const defaultParserOptions = {
 	locations: true,
 	ecmaVersion: 2019,
 	sourceType: "module",
-	onComment: null,
-	plugins: {
-		dynamicImport: true
-	}
+	onComment: null
 };
 
 // regexp to match at lease one "magic comment"
@@ -2133,9 +2133,13 @@ class Parser extends Tapable {
 			sourceType: this.sourceType,
 			locations: false
 		});
+		// TODO(https://github.com/acornjs/acorn/issues/741)
+		// @ts-ignore
 		if (ast.body.length !== 1 || ast.body[0].type !== "ExpressionStatement") {
 			throw new Error("evaluate: Source is not a expression");
 		}
+		// TODO(https://github.com/acornjs/acorn/issues/741)
+		// @ts-ignore
 		return this.evaluateExpression(ast.body[0].expression);
 	}
 
@@ -2226,7 +2230,7 @@ class Parser extends Tapable {
 		let error;
 		let threw = false;
 		try {
-			ast = acorn.parse(code, parserOptions);
+			ast = acornParser.parse(code, parserOptions);
 		} catch (e) {
 			error = e;
 			threw = true;
@@ -2238,7 +2242,7 @@ class Parser extends Tapable {
 				parserOptions.onComment.length = 0;
 			}
 			try {
-				ast = acorn.parse(code, parserOptions);
+				ast = acornParser.parse(code, parserOptions);
 				threw = false;
 			} catch (e) {
 				threw = true;

package.json

@@ -9,8 +9,8 @@
     "@webassemblyjs/helper-module-context": "1.7.11",
     "@webassemblyjs/wasm-edit": "1.7.11",
     "@webassemblyjs/wasm-parser": "1.7.11",
-    "acorn": "^5.6.2",
-    "acorn-dynamic-import": "^3.0.0",
+    "acorn": "^6.0.5",
+    "acorn-dynamic-import": "^4.0.0",
     "ajv": "^6.1.0",
     "ajv-keywords": "^3.1.0",
     "chrome-trace-event": "^1.0.0",

test/cases/parsing/precreated-ast/ast-loader.js

@@ -1,17 +1,15 @@
 "use strict";
 
-const acorn = require("acorn-dynamic-import").default;
+const acorn = require("acorn");
+const acornParser = acorn.Parser.extend(require("acorn-dynamic-import").default);
 
 module.exports = function(source) {
 	const comments = [];
-	const ast = acorn.parse(source, {
+	const ast = acornParser.parse(source, {
 		ranges: true,
 		locations: true,
 		ecmaVersion: 2017,
 		sourceType: "module",
-		plugins: {
-			dynamicImport: true
-		},
 		onComment: comments
 	});
 

yarn.lock

@@ -279,12 +279,10 @@ accepts@~1.2.12:
     mime-types "~2.1.6"
     negotiator "0.5.3"
 
-acorn-dynamic-import@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/acorn-dynamic-import/-/acorn-dynamic-import-3.0.0.tgz#901ceee4c7faaef7e07ad2a47e890675da50a278"
-  integrity sha512-zVWV8Z8lislJoOKKqdNMOB+s6+XV5WERty8MnKBeFgwA+19XJjJHs2RP5dzM57FftIs+jQnRToLiWazKr6sSWg==
-  dependencies:
-    acorn "^5.0.0"
+acorn-dynamic-import@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/acorn-dynamic-import/-/acorn-dynamic-import-4.0.0.tgz#482210140582a36b83c3e342e1cfebcaa9240948"
+  integrity sha512-d3OEjQV4ROpoflsnUA8HozoIR504TFxNivYEUi6uwz0IYhBkTDXGuWlNdMtybRt3nqVx/L6XqMt0FxkXuWKZhw==
 
 acorn-globals@^1.0.3:
   version "1.0.9"
@@ -339,11 +337,16 @@ acorn@^5.0.0, acorn@^5.3.0:
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.1.tgz#f095829297706a7c9776958c0afc8930a9b9d9d8"
   integrity sha512-d+nbxBUGKg7Arpsvbnlq61mc12ek3EY8EQldM3GPAhWJ1UVxC6TDGbIvUMNU6obBX3i1+ptCIzV4vq0gFPEGVQ==
 
-acorn@^5.0.3, acorn@^5.6.0, acorn@^5.6.2:
+acorn@^5.0.3, acorn@^5.6.0:
   version "5.7.2"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.2.tgz#91fa871883485d06708800318404e72bfb26dcc5"
   integrity sha512-cJrKCNcr2kv8dlDnbw+JPUGjHZzo4myaxOLmpOX8a+rgX94YeTcTMv/LFJUSByRpc+i4GgVnnhLxvMu/2Y+rqw==
 
+acorn@^6.0.5:
+  version "6.0.5"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.0.5.tgz#81730c0815f3f3b34d8efa95cb7430965f4d887a"
+  integrity sha512-i33Zgp3XWtmZBMNvCr4azvOFeWVw1Rk6p3hfi3LUDvIFraOMywb1kAtrbi+med14m4Xfpqm3zRZMT+c0FNE7kg==
+
 ajv-errors@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/ajv-errors/-/ajv-errors-1.0.0.tgz#ecf021fa108fd17dfb5e6b383f2dd233e31ffc59"