acorn - npm Package Compare versions

Comparing version 4.0.2 to 4.0.3

CHANGELOG.md

@@ -0,1 +1,12 @@
+## 4.0.3 (2016-08-16)
+
+### Bug fixes
+
+Allow regular function declarations inside single-statement `if`
+branches in loose mode. Forbid them entirely in strict mode.
+
+Properly parse properties named `async` in ES2017 mode.
+
+Fix bug where reserved words were broken in ES2017 mode.
+
 ## 4.0.2 (2016-08-11)
@@ -2,0 +13,0 @@

dist/acorn_loose.es.js

@@ -1120,3 +1120,3 @@ import { defaultOptions, addLooseExports, SourceLocation, tokTypes, tokenizer, Node, lineBreak, isNewLine, getLineInfo, Token, lineBreakG } from './acorn.js';
         prop.key.type === "Identifier" && prop.key.name === "async" && this$1.tok.type !== tokTypes.parenL &&
-        !this$1.canInsertSemicolon()) {
+        this$1.tok.type !== tokTypes.colon && !this$1.canInsertSemicolon()) {
       this$1.parsePropertyName(prop)
@@ -1123,0 +1123,0 @@ isAsync = true

dist/acorn_loose.js

@@ -1124,3 +1124,3 @@ (function (global, factory) {
           prop.key.type === "Identifier" && prop.key.name === "async" && this$1.tok.type !== __acorn_js.tokTypes.parenL &&
-          !this$1.canInsertSemicolon()) {
+          this$1.tok.type !== __acorn_js.tokTypes.colon && !this$1.canInsertSemicolon()) {
         this$1.parsePropertyName(prop)
@@ -1127,0 +1127,0 @@ isAsync = true

package.json

@@ -7,3 +7,3 @@ {
   "jsnext:main": "dist/acorn.es.js",
-  "version": "4.0.2",
+  "version": "4.0.3",
   "engines": {
@@ -10,0 +10,0 @@ "node": ">=0.4.0"

src/expression.js

@@ -527,3 +527,3 @@ // A recursive descent parser operates by defining functions for all
         prop.key.type === "Identifier" && prop.key.name === "async" && this.type !== tt.parenL &&
-        !this.canInsertSemicolon()) {
+        this.type !== tt.colon && !this.canInsertSemicolon()) {
       isAsync = true
@@ -530,0 +530,0 @@ this.parsePropertyName(prop, refDestructuringErrors)

src/identifier.js

@@ -7,3 +7,2 @@ // Reserved word lists for various dialects of the language
   6: "enum",
-  7: "enum",
   strict: "implements interface let package private protected public static yield",
@@ -10,0 +9,0 @@ strictBind: "eval arguments"

src/index.js

@@ -39,3 +39,3 @@ // Acorn is a tiny, fast JavaScript parser written in JavaScript.
 
-export const version = "4.0.2"
+export const version = "4.0.3"
 
@@ -42,0 +42,0 @@ // The main exported interface (under `self.acorn` when in the

src/loose/expression.js

@@ -371,3 +371,3 @@ import {LooseParser} from "./state"
         prop.key.type === "Identifier" && prop.key.name === "async" && this.tok.type !== tt.parenL &&
-        !this.canInsertSemicolon()) {
+        this.tok.type !== tt.colon && !this.canInsertSemicolon()) {
       this.parsePropertyName(prop)
@@ -374,0 +374,0 @@ isAsync = true

src/state.js

@@ -18,4 +18,8 @@ import {reservedWords, keywords} from "./identifier"
     this.keywords = keywordRegexp(keywords[options.ecmaVersion >= 6 ? 6 : 5])
-    let reserved = options.allowReserved ? "" :
-        reservedWords[options.ecmaVersion] + (options.sourceType == "module" ? " await" : "")
+    let reserved = ""
+    if (!options.allowReserved) {
+      for (let v = options.ecmaVersion;; v--)
+        if (reserved = reservedWords[v]) break
+      if (options.sourceType == "module") reserved += " await"
+    }
     this.reservedWords = keywordRegexp(reserved)
@@ -22,0 +26,0 @@ let reservedStrict = (reserved ? reserved + " " : "") + reservedWords.strict

src/statement.js

@@ -90,3 +90,3 @@ import {types as tt} from "./tokentype"
   case tt._function:
-    if (!declaration && this.options.ecmaVersion >= 6) break
+    if (!declaration && this.options.ecmaVersion >= 6) this.unexpected()
     return this.parseFunctionStatement(node, false)
@@ -118,18 +118,19 @@ case tt._class:
     return starttype === tt._import ? this.parseImport(node) : this.parseExport(node, exports)
-  }
 
-  if (this.isAsyncFunction() && declaration) {
-    this.next()
-    return this.parseFunctionStatement(node, true)
+    // If the statement does not start with a statement keyword or a
+    // brace, it's an ExpressionStatement or LabeledStatement. We
+    // simply start parsing an expression, and afterwards, if the
+    // next token is a colon and the expression was a simple
+    // Identifier node, we switch to interpreting it as a label.
+  default:
+    if (this.isAsyncFunction() && declaration) {
+      this.next()
+      return this.parseFunctionStatement(node, true)
+    }
+
+    let maybeName = this.value, expr = this.parseExpression()
+    if (starttype === tt.name && expr.type === "Identifier" && this.eat(tt.colon))
+      return this.parseLabeledStatement(node, maybeName, expr)
+    else return this.parseExpressionStatement(node, expr)
   }
-
-  // If the statement does not start with a statement keyword or a
-  // brace, it's an ExpressionStatement or LabeledStatement. We
-  // simply start parsing an expression, and afterwards, if the
-  // next token is a colon and the expression was a simple
-  // Identifier node, we switch to interpreting it as a label.
-  let maybeName = this.value, expr = this.parseExpression()
-  if (starttype === tt.name && expr.type === "Identifier" && this.eat(tt.colon))
-    return this.parseLabeledStatement(node, maybeName, expr)
-  else return this.parseExpressionStatement(node, expr)
 }
@@ -222,7 +223,12 @@
 
+pp.isFunction = function() {
+  return this.type === tt._function || this.isAsyncFunction()
+}
+
 pp.parseIfStatement = function(node) {
   this.next()
   node.test = this.parseParenExpression()
-  node.consequent = this.parseStatement(false)
-  node.alternate = this.eat(tt._else) ? this.parseStatement(false) : null
+  // allow function declarations in branches, but only in non-strict mode
+  node.consequent = this.parseStatement(!this.strict && this.isFunction())
+  node.alternate = this.eat(tt._else) ? this.parseStatement(!this.strict && this.isFunction()) : null
   return this.finishNode(node, "IfStatement")
@@ -731,3 +737,3 @@ }
       if (this.isKeyword(node.local.name)) this.unexpected(node.local.start)
-      if (this.reservedWordsStrict.test(node.local.name)) this.raise(node.local.start, "The keyword '" + node.local.name + "' is reserved")
+      if (this.reservedWordsStrict.test(node.local.name)) this.raiseRecoverable(node.local.start, "The keyword '" + node.local.name + "' is reserved")
     }
@@ -734,0 +740,0 @@ this.checkLVal(node.local, true)

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Improved metrics

Total package byte prevSize

577811

increased by0.26%

Lines of code

13535

increased by0.18%

No dependency changes