implemented a rule to forbid the export of symbols

.eslintrc.cjs

@@ -8,7 +8,7 @@ module.exports = {
     project: "./tsconfig.eslint.json",
   },
   ignorePatterns: ["*.cjs", "*.js"],
-  plugins: ["@typescript-eslint"],
+  plugins: ["@typescript-eslint", "@tact-lang/local-rules"],
   root: true,
   env: {
     node: true,
@@ -93,5 +93,6 @@ module.exports = {
     "require-await": "off",
     "@typescript-eslint/require-await": "error",
     "@typescript-eslint/unified-signatures": "error",
+    "@tact-lang/local-rules/no-export-symbol": "error",
   },
 };

package.json

@@ -82,6 +82,7 @@
     "@swc/core": "^1.10.7",
     "@swc/jest": "^0.2.37",
     "@tact-lang/coverage": "^0.0.8",
+    "@tact-lang/eslint-plugin-local-rules": "file:packages/eslint-plugin-local-rules",
     "@tact-lang/ton-abi": "^0.0.3",
     "@tact-lang/ton-jest": "^0.0.4",
     "@ton/sandbox": "^0.24.0",
@@ -94,8 +95,8 @@
     "@types/node": "^22.5.0",
     "@typescript-eslint/eslint-plugin": "^8.21.0",
     "@typescript-eslint/parser": "^8.21.0",
-    "cli-table3": "^0.6.5",
     "chalk": "4.1.2",
+    "cli-table3": "^0.6.5",
     "cross-env": "^7.0.3",
     "cspell": "^8.8.3",
     "diff": "^7.0.0",

packages/eslint-plugin-local-rules/index.js

@@ -0,0 +1,10 @@
+const { name, version } = require("./package.json");
+module.exports = {
+    meta: {
+        name: name,
+        version: version,
+    },
+    rules: {
+        "no-export-symbol": require("./rules/no-export-symbol"),
+    },
+};

packages/eslint-plugin-local-rules/package.json

@@ -0,0 +1,6 @@
+{
+  "name": "@tact-lang/eslint-plugin-local-rules",
+  "version": "0.0.0",
+  "private": true,
+  "main": "index.js"
+}

packages/eslint-plugin-local-rules/rules/no-export-symbol.js

@@ -0,0 +1,39 @@
+const ts = require("typescript");
+
+module.exports = {
+    meta: {
+        type: "problem",
+        docs: {
+            url: "https://github.com/tact-lang/tact/issues/1695",
+            recommended: true,
+        },
+    },
+
+    create(context) {
+        const parserServices = context.sourceCode.parserServices;
+        const checker = parserServices.program.getTypeChecker();
+
+        return {
+            ExportSpecifier(node) {
+                const tsNode = parserServices.esTreeNodeToTSNodeMap.get(node);
+                const type = checker.getTypeAtLocation(tsNode);
+
+                if (!isSymbolType(type)) {
+                    return;
+                }
+
+                const name = context.sourceCode.getText(node);
+                context.report({
+                    node,
+                    message: "Forbidden to export the '{{name}}' symbol",
+                    data: { name },
+                });
+            },
+        };
+
+        function isSymbolType(type) {
+            const flags = type.getFlags();
+            return flags === ts.TypeFlags.UniqueESSymbol;
+        }
+    },
+};

src/utils/example.ts

@@ -0,0 +1,3 @@
+const exampleSymbol = Symbol("example");
+
+export { exampleSymbol }; // error:  Forbidden to export the 'exampleSymbol' symbol

yarn.lock

@@ -1284,6 +1284,9 @@
     teslabot "^1.5.0"
     zod "^3.20.2"
 
+"@tact-lang/eslint-plugin-local-rules@file:packages/eslint-plugin-local-rules":
+  version "0.0.0"
+
 "@tact-lang/opcode@^0.0.14":
   version "0.0.14"
   resolved "https://registry.npmjs.org/@tact-lang/opcode/-/opcode-0.0.14.tgz"