nodejs · nodejs-github-bot · Jun 23, 2025 · Jun 22, 2025
diff --git a/deps/acorn/acorn/CHANGELOG.md b/deps/acorn/acorn/CHANGELOG.md
@@ -1,3 +1,17 @@
+## 8.15.0 (2025-06-08)
+
+### New features
+
+Support `using` and `await using` syntax.
+
+The `AnyNode` type is now defined in such a way that plugins can extend it.
+
+### Bug fixes
+
+Fix an issue where the `bigint` property of literal nodes for non-decimal bigints had the wrong format.
+
+The `acorn` CLI tool no longer crashes when emitting a tree that contains a bigint.
+
 ## 8.14.1 (2025-03-05)
 
 ### Bug fixes

diff --git a/deps/acorn/acorn/dist/acorn.d.mts b/deps/acorn/acorn/dist/acorn.d.mts
@@ -169,7 +169,7 @@ export interface FunctionDeclaration extends Function {
 export interface VariableDeclaration extends Node {
   type: "VariableDeclaration"
   declarations: Array<VariableDeclarator>
-  kind: "var" | "let" | "const"
+  kind: "var" | "let" | "const" | "using" | "await using"
 }
 
 export interface VariableDeclarator extends Node {
@@ -572,7 +572,24 @@ export type ModuleDeclaration =
 | ExportDefaultDeclaration
 | ExportAllDeclaration
 
-export type AnyNode = Statement | Expression | Declaration | ModuleDeclaration | Literal | Program | SwitchCase | CatchClause | Property | Super | SpreadElement | TemplateElement | AssignmentProperty | ObjectPattern | ArrayPattern | RestElement | AssignmentPattern | ClassBody | MethodDefinition | MetaProperty | ImportAttribute | ImportSpecifier | ImportDefaultSpecifier | ImportNamespaceSpecifier | ExportSpecifier | AnonymousFunctionDeclaration | AnonymousClassDeclaration | PropertyDefinition | PrivateIdentifier | StaticBlock | VariableDeclarator
+/**
+  * This interface is only used for defining {@link AnyNode}.
+  * It exists so that it can be extended by plugins:
+  *
+  * @example
+  * ```typescript
+  * declare module 'acorn' {
+  *   interface NodeTypes {
+  *     pluginName: FirstNode | SecondNode | ThirdNode | ... | LastNode
+  *   }
+  * }
+  * ```
+  */
+interface NodeTypes {
+  core: Statement | Expression | Declaration | ModuleDeclaration | Literal | Program | SwitchCase | CatchClause | Property | Super | SpreadElement | TemplateElement | AssignmentProperty | ObjectPattern | ArrayPattern | RestElement | AssignmentPattern | ClassBody | MethodDefinition | MetaProperty | ImportAttribute | ImportSpecifier | ImportDefaultSpecifier | ImportNamespaceSpecifier | ExportSpecifier | AnonymousFunctionDeclaration | AnonymousClassDeclaration | PropertyDefinition | PrivateIdentifier | StaticBlock | VariableDeclarator
+}
+
+export type AnyNode = NodeTypes[keyof NodeTypes]
 
 export function parse(input: string, options: Options): Program
 
@@ -583,7 +600,7 @@ export function tokenizer(input: string, options: Options): {
   [Symbol.iterator](): Iterator<Token>
 }
 
-export type ecmaVersion = 3 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | "latest"
+export type ecmaVersion = 3 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | "latest"
 
 export interface Options {
   /**

diff --git a/deps/acorn/acorn/dist/acorn.d.ts b/deps/acorn/acorn/dist/acorn.d.ts
@@ -169,7 +169,7 @@ export interface FunctionDeclaration extends Function {
 export interface VariableDeclaration extends Node {
   type: "VariableDeclaration"
   declarations: Array<VariableDeclarator>
-  kind: "var" | "let" | "const"
+  kind: "var" | "let" | "const" | "using" | "await using"
 }
 
 export interface VariableDeclarator extends Node {
@@ -572,7 +572,24 @@ export type ModuleDeclaration =
 | ExportDefaultDeclaration
 | ExportAllDeclaration
 
-export type AnyNode = Statement | Expression | Declaration | ModuleDeclaration | Literal | Program | SwitchCase | CatchClause | Property | Super | SpreadElement | TemplateElement | AssignmentProperty | ObjectPattern | ArrayPattern | RestElement | AssignmentPattern | ClassBody | MethodDefinition | MetaProperty | ImportAttribute | ImportSpecifier | ImportDefaultSpecifier | ImportNamespaceSpecifier | ExportSpecifier | AnonymousFunctionDeclaration | AnonymousClassDeclaration | PropertyDefinition | PrivateIdentifier | StaticBlock | VariableDeclarator
+/**
+  * This interface is only used for defining {@link AnyNode}.
+  * It exists so that it can be extended by plugins:
+  *
+  * @example
+  * ```typescript
+  * declare module 'acorn' {
+  *   interface NodeTypes {
+  *     pluginName: FirstNode | SecondNode | ThirdNode | ... | LastNode
+  *   }
+  * }
+  * ```
+  */
+interface NodeTypes {
+  core: Statement | Expression | Declaration | ModuleDeclaration | Literal | Program | SwitchCase | CatchClause | Property | Super | SpreadElement | TemplateElement | AssignmentProperty | ObjectPattern | ArrayPattern | RestElement | AssignmentPattern | ClassBody | MethodDefinition | MetaProperty | ImportAttribute | ImportSpecifier | ImportDefaultSpecifier | ImportNamespaceSpecifier | ExportSpecifier | AnonymousFunctionDeclaration | AnonymousClassDeclaration | PropertyDefinition | PrivateIdentifier | StaticBlock | VariableDeclarator
+}
+
+export type AnyNode = NodeTypes[keyof NodeTypes]
 
 export function parse(input: string, options: Options): Program
 
@@ -583,7 +600,7 @@ export function tokenizer(input: string, options: Options): {
   [Symbol.iterator](): Iterator<Token>
 }
 
-export type ecmaVersion = 3 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | "latest"
+export type ecmaVersion = 3 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | "latest"
 
 export interface Options {
   /**

diff --git a/deps/acorn/acorn/dist/acorn.js b/deps/acorn/acorn/dist/acorn.js
@@ -887,6 +887,49 @@
        !(isIdentifierChar(after = this.input.charCodeAt(next + 8)) || after > 0xd7ff && after < 0xdc00))
   };
 
+  pp$8.isUsingKeyword = function(isAwaitUsing, isFor) {
+    if (this.options.ecmaVersion < 17 || !this.isContextual(isAwaitUsing ? "await" : "using"))
+      { return false }
+
+    skipWhiteSpace.lastIndex = this.pos;
+    var skip = skipWhiteSpace.exec(this.input);
+    var next = this.pos + skip[0].length;
+
+    if (lineBreak.test(this.input.slice(this.pos, next))) { return false }
+
+    if (isAwaitUsing) {
+      var awaitEndPos = next + 5 /* await */, after;
+      if (this.input.slice(next, awaitEndPos) !== "using" ||
+        awaitEndPos === this.input.length ||
+        isIdentifierChar(after = this.input.charCodeAt(awaitEndPos)) ||
+        (after > 0xd7ff && after < 0xdc00)
+      ) { return false }
+
+      skipWhiteSpace.lastIndex = awaitEndPos;
+      var skipAfterUsing = skipWhiteSpace.exec(this.input);
+      if (skipAfterUsing && lineBreak.test(this.input.slice(awaitEndPos, awaitEndPos + skipAfterUsing[0].length))) { return false }
+    }
+
+    if (isFor) {
+      var ofEndPos = next + 2 /* of */, after$1;
+      if (this.input.slice(next, ofEndPos) === "of") {
+        if (ofEndPos === this.input.length ||
+          (!isIdentifierChar(after$1 = this.input.charCodeAt(ofEndPos)) && !(after$1 > 0xd7ff && after$1 < 0xdc00))) { return false }
+      }
+    }
+
+    var ch = this.input.charCodeAt(next);
+    return isIdentifierStart(ch, true) || ch === 92 // '\'
+  };
+
+  pp$8.isAwaitUsing = function(isFor) {
+    return this.isUsingKeyword(true, isFor)
+  };
+
+  pp$8.isUsing = function(isFor) {
+    return this.isUsingKeyword(false, isFor)
+  };
+
   // Parse a single statement.
   //
   // If expecting a statement and finding a slash operator, parse a
@@ -963,6 +1006,23 @@
         return this.parseFunctionStatement(node, true, !context)
       }
 
+      var usingKind = this.isAwaitUsing(false) ? "await using" : this.isUsing(false) ? "using" : null;
+      if (usingKind) {
+        if (topLevel && this.options.sourceType === "script") {
+          this.raise(this.start, "Using declaration cannot appear in the top level when source type is `script`");
+        }
+        if (usingKind === "await using") {
+          if (!this.canAwait) {
+            this.raise(this.start, "Await using cannot appear outside of async function");
+          }
+          this.next();
+        }
+        this.next();
+        this.parseVar(node, false, usingKind);
+        this.semicolon();
+        return this.finishNode(node, "VariableDeclaration")
+      }
+
       var maybeName = this.value, expr = this.parseExpression();
       if (starttype === types$1.name && expr.type === "Identifier" && this.eat(types$1.colon))
         { return this.parseLabeledStatement(node, maybeName, expr, context) }
@@ -1038,18 +1098,19 @@
       this.next();
       this.parseVar(init$1, true, kind);
       this.finishNode(init$1, "VariableDeclaration");
-      if ((this.type === types$1._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init$1.declarations.length === 1) {
-        if (this.options.ecmaVersion >= 9) {
-          if (this.type === types$1._in) {
-            if (awaitAt > -1) { this.unexpected(awaitAt); }
-          } else { node.await = awaitAt > -1; }
-        }
-        return this.parseForIn(node, init$1)
-      }
-      if (awaitAt > -1) { this.unexpected(awaitAt); }
-      return this.parseFor(node, init$1)
+      return this.parseForAfterInit(node, init$1, awaitAt)
     }
     var startsWithLet = this.isContextual("let"), isForOf = false;
+
+    var usingKind = this.isUsing(true) ? "using" : this.isAwaitUsing(true) ? "await using" : null;
+    if (usingKind) {
+      var init$2 = this.startNode();
+      this.next();
+      if (usingKind === "await using") { this.next(); }
+      this.parseVar(init$2, true, usingKind);
+      this.finishNode(init$2, "VariableDeclaration");
+      return this.parseForAfterInit(node, init$2, awaitAt)
+    }
     var containsEsc = this.containsEsc;
     var refDestructuringErrors = new DestructuringErrors;
     var initPos = this.start;
@@ -1075,6 +1136,20 @@
     return this.parseFor(node, init)
   };
 
+  // Helper method to parse for loop after variable initialization
+  pp$8.parseForAfterInit = function(node, init, awaitAt) {
+    if ((this.type === types$1._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init.declarations.length === 1) {
+      if (this.options.ecmaVersion >= 9) {
+        if (this.type === types$1._in) {
+          if (awaitAt > -1) { this.unexpected(awaitAt); }
+        } else { node.await = awaitAt > -1; }
+      }
+      return this.parseForIn(node, init)
+    }
+    if (awaitAt > -1) { this.unexpected(awaitAt); }
+    return this.parseFor(node, init)
+  };
+
   pp$8.parseFunctionStatement = function(node, isAsync, declarationPosition) {
     this.next();
     return this.parseFunction(node, FUNC_STATEMENT | (declarationPosition ? 0 : FUNC_HANGING_STATEMENT), false, isAsync)
@@ -1331,6 +1406,8 @@
         decl.init = this.parseMaybeAssign(isFor);
       } else if (!allowMissingInitializer && kind === "const" && !(this.type === types$1._in || (this.options.ecmaVersion >= 6 && this.isContextual("of")))) {
         this.unexpected();
+      } else if (!allowMissingInitializer && (kind === "using" || kind === "await using") && this.options.ecmaVersion >= 17 && this.type !== types$1._in && !this.isContextual("of")) {
+        this.raise(this.lastTokEnd, ("Missing initializer in " + kind + " declaration"));
       } else if (!allowMissingInitializer && decl.id.type !== "Identifier" && !(isFor && (this.type === types$1._in || this.isContextual("of")))) {
         this.raise(this.lastTokEnd, "Complex binding patterns require an initialization value");
       } else {
@@ -1343,7 +1420,10 @@
   };
 
   pp$8.parseVarId = function(decl, kind) {
-    decl.id = this.parseBindingAtom();
+    decl.id = kind === "using" || kind === "await using"
+      ? this.parseIdent()
+      : this.parseBindingAtom();
+
     this.checkLValPattern(decl.id, kind === "var" ? BIND_VAR : BIND_LEXICAL, false);
   };
 
@@ -3074,7 +3154,8 @@
     var node = this.startNode();
     node.value = value;
     node.raw = this.input.slice(this.start, this.end);
-    if (node.raw.charCodeAt(node.raw.length - 1) === 110) { node.bigint = node.raw.slice(0, -1).replace(/_/g, ""); }
+    if (node.raw.charCodeAt(node.raw.length - 1) === 110)
+      { node.bigint = node.value != null ? node.value.toString() : node.raw.slice(0, -1).replace(/_/g, ""); }
     this.next();
     return this.finishNode(node, "Literal")
   };
@@ -6104,11 +6185,9 @@
   // Please use the [github bug tracker][ghbt] to report issues.
   //
   // [ghbt]: https://github.com/acornjs/acorn/issues
-  //
-  // [walk]: util/walk.js
 
 
-  var version = "8.14.1";
+  var version = "8.15.0";
 
   Parser.acorn = {
     Parser: Parser,