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;
+}elseif(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
 
 
-varversion="8.17.0";
+varversion="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;
+}elseif(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
 
 
-varversion="8.17.0";
+varversion="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
 #ifndefSRC_ACORN_VERSION_H_
 #defineSRC_ACORN_VERSION_H_
-#defineACORN_VERSION "8.17.0"
+#defineACORN_VERSION "8.18.0"
 #endif// SRC_ACORN_VERSION_H_

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;
+}elseif(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
 
 
-varversion="8.17.0";
+varversion="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;
+}elseif(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
 
 
-varversion="8.17.0";
+varversion="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
 #ifndefSRC_ACORN_VERSION_H_
 #defineSRC_ACORN_VERSION_H_
-#defineACORN_VERSION "8.17.0"
+#defineACORN_VERSION "8.18.0"
 #endif// SRC_ACORN_VERSION_H_

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;
+}elseif(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
 
 
-varversion="8.17.0";
+varversion="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;
+}elseif(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
 
 
-varversion="8.17.0";
+varversion="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
 #ifndefSRC_ACORN_VERSION_H_
 #defineSRC_ACORN_VERSION_H_
-#defineACORN_VERSION "8.17.0"
+#defineACORN_VERSION "8.18.0"
 #endif// SRC_ACORN_VERSION_H_

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;
+}elseif(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
 
 
-varversion="8.17.0";
+varversion="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;
+}elseif(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
 
 
-varversion="8.17.0";
+varversion="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
 #ifndefSRC_ACORN_VERSION_H_
 #defineSRC_ACORN_VERSION_H_
-#defineACORN_VERSION "8.17.0"
+#defineACORN_VERSION "8.18.0"
 #endif// SRC_ACORN_VERSION_H_

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;
+}elseif(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
 
 
-varversion="8.17.0";
+varversion="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;
+}elseif(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
 
 
-varversion="8.17.0";
+varversion="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
 #ifndefSRC_ACORN_VERSION_H_
 #defineSRC_ACORN_VERSION_H_
-#defineACORN_VERSION "8.17.0"
+#defineACORN_VERSION "8.18.0"
 #endif// SRC_ACORN_VERSION_H_

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;
+}elseif(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
 
 
-varversion="8.17.0";
+varversion="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;
+}elseif(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
 
 
-varversion="8.17.0";
+varversion="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
 #ifndefSRC_ACORN_VERSION_H_
 #defineSRC_ACORN_VERSION_H_
-#defineACORN_VERSION "8.17.0"
+#defineACORN_VERSION "8.18.0"
 #endif// SRC_ACORN_VERSION_H_

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;
+}elseif(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
 
 
-varversion="8.17.0";
+varversion="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;
+}elseif(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
 
 
-varversion="8.17.0";
+varversion="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
 #ifndefSRC_ACORN_VERSION_H_
 #defineSRC_ACORN_VERSION_H_
-#defineACORN_VERSION "8.17.0"
+#defineACORN_VERSION "8.18.0"
 #endif// SRC_ACORN_VERSION_H_

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;
+}elseif(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
 
 
-varversion="8.17.0";
+varversion="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;
+}elseif(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
 
 
-varversion="8.17.0";
+varversion="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
 #ifndefSRC_ACORN_VERSION_H_
 #defineSRC_ACORN_VERSION_H_
-#defineACORN_VERSION "8.17.0"
+#defineACORN_VERSION "8.18.0"
 #endif// SRC_ACORN_VERSION_H_