deps: update acorn to 8.18.0

PR-URL: #64941
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

Author: nodejs-github-bot

deps/acorn/acorn/CHANGELOG.md

@@ -1,3 +1,15 @@
+## 8.18.0 (2026-07-28)
+
+### New features
+
+The new `startLocation` option can now be used to tell the parser the line and column the parse starts at (mostly useful with `parseExpressionAt`).
+
+### Bug fixes
+
+Reject uses of `**` with a non-parenthesized arrow function as left-hand side.
+
+Avoid computing the start line in `parseExpressionAt` when locations aren't used.
+
 ## 8.17.0 (2026-06-11)
 
 ### New features

deps/acorn/acorn/README.md

@@ -137,6 +137,11 @@ required):
   one-based line and zero-based column numbers in `{line, column}`
   form. Default is `false`.
 
+- **startLocation**: An optional `{line, column}` object to use for
+  the start of the parse. This is mostly useful when using
+  `parseExpressionAt` with `locations: true`, to prevent the parser
+  from having to determine the line position at the start position.
+
 - **onToken**: If a function is passed for this option, each found
   token will be passed in same format as tokens returned from
   `tokenizer().getToken()`.

deps/acorn/acorn/dist/acorn.d.mts

@@ -693,6 +693,14 @@ export interface Options {
    */
   locations?: boolean
 
+  /**
+   * Pass an optional `{line, column}` object to use for the start of
+   * the parse. This is mostly useful when using `parseExpressionAt`
+   * with `locations: true`, to prevent the parser from having to
+   * determine the line position at the start position.
+   */
+  startLocation?: {line: number, column: number}
+
   /**
    * a callback that will cause Acorn to call that export function with object in the same
    * format as tokens returned from `tokenizer().getToken()`. Note

deps/acorn/acorn/dist/acorn.d.ts

@@ -693,6 +693,14 @@ export interface Options {
    */
   locations?: boolean
 
+  /**
+   * Pass an optional `{line, column}` object to use for the start of
+   * the parse. This is mostly useful when using `parseExpressionAt`
+   * with `locations: true`, to prevent the parser from having to
+   * determine the line position at the start position.
+   */
+  startLocation?: {line: number, column: number}
+
   /**
    * a callback that will cause Acorn to call that export function with object in the same
    * format as tokens returned from `tokenizer().getToken()`. Note

deps/acorn/acorn/dist/acorn.js

@@ -386,6 +386,11 @@
     // line being 1-based and column 0-based) will be attached to the
     // nodes.
     locations: false,
+    // Pass an optional `{line, column}` object to use for the start of
+    // the parse. This is mostly useful when using `parseExpressionAt`
+    // with `locations: true`, to prevent the parser from having to
+    // determine the line position at the start position.
+    startLocation: null,
     // A function can be passed as `onToken` option, which will
     // cause Acorn to call that function with object in the same
     // format as tokens returned from `tokenizer().getToken()`. Note
@@ -539,13 +544,17 @@
     // Set up token state
 
     // The current position of the tokenizer in the input.
-    if (startPos) {
-      this.pos = startPos;
+    this.pos = startPos || 0;
+    this.curLine = 1;
+    if (options.startLocation) {
+      this.lineStart = this.pos - options.startLocation.column;
+      this.curLine = options.startLocation.line;
+    } else if (startPos) {
       this.lineStart = this.input.lastIndexOf("\n", startPos - 1) + 1;
-      this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length;
+      if (this.options.locations)
+        { this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length; }
     } else {
-      this.pos = this.lineStart = 0;
-      this.curLine = 1;
+      this.lineStart = 0;
     }
 
     // Properties of the current token:
@@ -2888,7 +2897,7 @@
       }
     }
 
-    if (!incDec && this.eat(types$1.starstar)) {
+    if (!incDec && !(expr.type === "ArrowFunctionExpression" && expr.start === startPos) && this.eat(types$1.starstar)) {
       if (sawUnary)
         { this.unexpected(this.lastTokStart); }
       else
@@ -6258,7 +6267,7 @@
   // [ghbt]: https://github.com/acornjs/acorn/issues
 
 
-  var version = "8.17.0";
+  var version = "8.18.0";
 
   Parser.acorn = {
     Parser: Parser,

deps/acorn/acorn/dist/acorn.mjs

@@ -380,6 +380,11 @@ var defaultOptions = {
   // line being 1-based and column 0-based) will be attached to the
   // nodes.
   locations: false,
+  // Pass an optional `{line, column}` object to use for the start of
+  // the parse. This is mostly useful when using `parseExpressionAt`
+  // with `locations: true`, to prevent the parser from having to
+  // determine the line position at the start position.
+  startLocation: null,
   // A function can be passed as `onToken` option, which will
   // cause Acorn to call that function with object in the same
   // format as tokens returned from `tokenizer().getToken()`. Note
@@ -533,13 +538,17 @@ var Parser = function Parser(options, input, startPos) {
   // Set up token state
 
   // The current position of the tokenizer in the input.
-  if (startPos) {
-    this.pos = startPos;
+  this.pos = startPos || 0;
+  this.curLine = 1;
+  if (options.startLocation) {
+    this.lineStart = this.pos - options.startLocation.column;
+    this.curLine = options.startLocation.line;
+  } else if (startPos) {
     this.lineStart = this.input.lastIndexOf("\n", startPos - 1) + 1;
-    this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length;
+    if (this.options.locations)
+      { this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length; }
   } else {
-    this.pos = this.lineStart = 0;
-    this.curLine = 1;
+    this.lineStart = 0;
   }
 
   // Properties of the current token:
@@ -2882,7 +2891,7 @@ pp$5.parseMaybeUnary = function(refDestructuringErrors, sawUnary, incDec, forIni
     }
   }
 
-  if (!incDec && this.eat(types$1.starstar)) {
+  if (!incDec && !(expr.type === "ArrowFunctionExpression" && expr.start === startPos) && this.eat(types$1.starstar)) {
     if (sawUnary)
       { this.unexpected(this.lastTokStart); }
     else
@@ -6252,7 +6261,7 @@ pp.readWord = function() {
 // [ghbt]: https://github.com/acornjs/acorn/issues
 
 
-var version = "8.17.0";
+var version = "8.18.0";
 
 Parser.acorn = {
   Parser: Parser,

deps/acorn/acorn/package.json

@@ -16,7 +16,7 @@
     ],
     "./package.json": "./package.json"
   },
-  "version": "8.17.0",
+  "version": "8.18.0",
   "engines": {
     "node": ">=0.4.0"
   },

src/acorn_version.h

@@ -2,5 +2,5 @@
 // Refer to tools/dep_updaters/update-acorn.sh
 #ifndef SRC_ACORN_VERSION_H_
 #define SRC_ACORN_VERSION_H_
-#define ACORN_VERSION "8.17.0"
+#define ACORN_VERSION "8.18.0"
 #endif  // SRC_ACORN_VERSION_H_