Refactor: Switch from JSON to ESM

lib/index.js

@@ -2,11 +2,7 @@
  * @author Toru Nagashima <https://github.com/mysticatea>
  * See LICENSE file in root directory for full license.
  */
-import { readFileSync } from "fs";
-
-const KEYS = JSON.parse(
-    readFileSync(new URL("./visitor-keys.json", import.meta.url))
-);
+import KEYS from "./visitor-keys.js";
 
 // Types.
 const NODE_TYPES = Object.freeze(Object.keys(KEYS));

lib/visitor-keys.json → lib/visitor-keys.js

@@ -1,289 +1,289 @@
-{
-    "AssignmentExpression": [
+export default {
+    AssignmentExpression: [
         "left",
         "right"
     ],
-    "AssignmentPattern": [
+    AssignmentPattern: [
         "left",
         "right"
     ],
-    "ArrayExpression": [
+    ArrayExpression: [
         "elements"
     ],
-    "ArrayPattern": [
+    ArrayPattern: [
         "elements"
     ],
-    "ArrowFunctionExpression": [
+    ArrowFunctionExpression: [
         "params",
         "body"
     ],
-    "AwaitExpression": [
+    AwaitExpression: [
         "argument"
     ],
-    "BlockStatement": [
+    BlockStatement: [
         "body"
     ],
-    "BinaryExpression": [
+    BinaryExpression: [
         "left",
         "right"
     ],
-    "BreakStatement": [
+    BreakStatement: [
         "label"
     ],
-    "CallExpression": [
+    CallExpression: [
         "callee",
         "arguments"
     ],
-    "CatchClause": [
+    CatchClause: [
         "param",
         "body"
     ],
-    "ChainExpression": [
+    ChainExpression: [
         "expression"
     ],
-    "ClassBody": [
+    ClassBody: [
         "body"
     ],
-    "ClassDeclaration": [
+    ClassDeclaration: [
         "id",
         "superClass",
         "body"
     ],
-    "ClassExpression": [
+    ClassExpression: [
         "id",
         "superClass",
         "body"
     ],
-    "ConditionalExpression": [
+    ConditionalExpression: [
         "test",
         "consequent",
         "alternate"
     ],
-    "ContinueStatement": [
+    ContinueStatement: [
         "label"
     ],
-    "DebuggerStatement": [],
-    "DoWhileStatement": [
+    DebuggerStatement: [],
+    DoWhileStatement: [
         "body",
         "test"
     ],
-    "EmptyStatement": [],
-    "ExportAllDeclaration": [
+    EmptyStatement: [],
+    ExportAllDeclaration: [
         "exported",
         "source"
     ],
-    "ExportDefaultDeclaration": [
+    ExportDefaultDeclaration: [
         "declaration"
     ],
-    "ExportNamedDeclaration": [
+    ExportNamedDeclaration: [
         "declaration",
         "specifiers",
         "source"
     ],
-    "ExportSpecifier": [
+    ExportSpecifier: [
         "exported",
         "local"
     ],
-    "ExpressionStatement": [
+    ExpressionStatement: [
         "expression"
     ],
-    "ExperimentalRestProperty": [
+    ExperimentalRestProperty: [
         "argument"
     ],
-    "ExperimentalSpreadProperty": [
+    ExperimentalSpreadProperty: [
         "argument"
     ],
-    "ForStatement": [
+    ForStatement: [
         "init",
         "test",
         "update",
         "body"
     ],
-    "ForInStatement": [
+    ForInStatement: [
         "left",
         "right",
         "body"
     ],
-    "ForOfStatement": [
+    ForOfStatement: [
         "left",
         "right",
         "body"
     ],
-    "FunctionDeclaration": [
+    FunctionDeclaration: [
         "id",
         "params",
         "body"
     ],
-    "FunctionExpression": [
+    FunctionExpression: [
         "id",
         "params",
         "body"
     ],
-    "Identifier": [],
-    "IfStatement": [
+    Identifier: [],
+    IfStatement: [
         "test",
         "consequent",
         "alternate"
     ],
-    "ImportDeclaration": [
+    ImportDeclaration: [
         "specifiers",
         "source"
     ],
-    "ImportDefaultSpecifier": [
+    ImportDefaultSpecifier: [
         "local"
     ],
-    "ImportExpression": [
+    ImportExpression: [
         "source"
     ],
-    "ImportNamespaceSpecifier": [
+    ImportNamespaceSpecifier: [
         "local"
     ],
-    "ImportSpecifier": [
+    ImportSpecifier: [
         "imported",
         "local"
     ],
-    "JSXAttribute": [
+    JSXAttribute: [
         "name",
         "value"
     ],
-    "JSXClosingElement": [
+    JSXClosingElement: [
         "name"
     ],
-    "JSXElement": [
+    JSXElement: [
         "openingElement",
         "children",
         "closingElement"
     ],
-    "JSXEmptyExpression": [],
-    "JSXExpressionContainer": [
+    JSXEmptyExpression: [],
+    JSXExpressionContainer: [
         "expression"
     ],
-    "JSXIdentifier": [],
-    "JSXMemberExpression": [
+    JSXIdentifier: [],
+    JSXMemberExpression: [
         "object",
         "property"
     ],
-    "JSXNamespacedName": [
+    JSXNamespacedName: [
         "namespace",
         "name"
     ],
-    "JSXOpeningElement": [
+    JSXOpeningElement: [
         "name",
         "attributes"
     ],
-    "JSXSpreadAttribute": [
+    JSXSpreadAttribute: [
         "argument"
     ],
-    "JSXText": [],
-    "JSXFragment": [
+    JSXText: [],
+    JSXFragment: [
         "openingFragment",
         "children",
         "closingFragment"
     ],
-    "Literal": [],
-    "LabeledStatement": [
+    Literal: [],
+    LabeledStatement: [
         "label",
         "body"
     ],
-    "LogicalExpression": [
+    LogicalExpression: [
         "left",
         "right"
     ],
-    "MemberExpression": [
+    MemberExpression: [
         "object",
         "property"
     ],
-    "MetaProperty": [
+    MetaProperty: [
         "meta",
         "property"
     ],
-    "MethodDefinition": [
+    MethodDefinition: [
         "key",
         "value"
     ],
-    "NewExpression": [
+    NewExpression: [
         "callee",
         "arguments"
     ],
-    "ObjectExpression": [
+    ObjectExpression: [
         "properties"
     ],
-    "ObjectPattern": [
+    ObjectPattern: [
         "properties"
     ],
-    "PrivateIdentifier": [],
-    "Program": [
+    PrivateIdentifier: [],
+    Program: [
         "body"
     ],
-    "Property": [
+    Property: [
         "key",
         "value"
     ],
-    "PropertyDefinition": [
+    PropertyDefinition: [
         "key",
         "value"
     ],
-    "RestElement": [
+    RestElement: [
         "argument"
     ],
-    "ReturnStatement": [
+    ReturnStatement: [
         "argument"
     ],
-    "SequenceExpression": [
+    SequenceExpression: [
         "expressions"
     ],
-    "SpreadElement": [
+    SpreadElement: [
         "argument"
     ],
-    "Super": [],
-    "SwitchStatement": [
+    Super: [],
+    SwitchStatement: [
         "discriminant",
         "cases"
     ],
-    "SwitchCase": [
+    SwitchCase: [
         "test",
         "consequent"
     ],
-    "TaggedTemplateExpression": [
+    TaggedTemplateExpression: [
         "tag",
         "quasi"
     ],
-    "TemplateElement": [],
-    "TemplateLiteral": [
+    TemplateElement: [],
+    TemplateLiteral: [
         "quasis",
         "expressions"
     ],
-    "ThisExpression": [],
-    "ThrowStatement": [
+    ThisExpression: [],
+    ThrowStatement: [
         "argument"
     ],
-    "TryStatement": [
+    TryStatement: [
         "block",
         "handler",
         "finalizer"
     ],
-    "UnaryExpression": [
+    UnaryExpression: [
         "argument"
     ],
-    "UpdateExpression": [
+    UpdateExpression: [
         "argument"
     ],
-    "VariableDeclaration": [
+    VariableDeclaration: [
         "declarations"
     ],
-    "VariableDeclarator": [
+    VariableDeclarator: [
         "id",
         "init"
     ],
-    "WhileStatement": [
+    WhileStatement: [
         "test",
         "body"
     ],
-    "WithStatement": [
+    WithStatement: [
         "object",
         "body"
     ],
-    "YieldExpression": [
+    YieldExpression: [
         "argument"
     ]
-}
+};