Bigint Support without transform (#8006)

packages/babel-generator/src/generators/types.js

@@ -143,3 +143,12 @@ export function StringLiteral(node: Object) {
 
   return this.token(val);
 }
+
+export function BigIntLiteral(node: Object) {
+  const raw = this.getPossibleRaw(node);
+  if (!this.format.minified && raw != null) {
+    this.token(raw);
+    return;
+  }
+  this.token(node.value);
+}

packages/babel-generator/test/fixtures/types/BigIntLiteral/input.js

@@ -0,0 +1,5 @@
+100n;
+9223372036854775807n;
+0o16432n;
+0xFFF123n;
+0b101011101n;

packages/babel-generator/test/fixtures/types/BigIntLiteral/options.json

@@ -0,0 +1 @@
+{ "plugins": ["bigInt"] }

packages/babel-generator/test/fixtures/types/BigIntLiteral/output.js

@@ -0,0 +1,5 @@
+100n;
+9223372036854775807n;
+0o16432n;
+0xFFF123n;
+0b101011101n;

packages/babel-plugin-syntax-bigint/.npmignore

@@ -0,0 +1,3 @@
+node_modules
+*.log
+src

packages/babel-plugin-syntax-bigint/README.md

@@ -0,0 +1,36 @@
+# @babel/plugin-syntax-bigint
+
+> Allow parsing of BigInt literals.
+
+
+## Installation
+
+```sh
+npm install --save-dev @babel/plugin-syntax-bigint
+```
+
+## Usage
+
+### Via `.babelrc` (Recommended)
+
+**.babelrc**
+
+```json
+{
+  "plugins": ["@babel/plugin-syntax-bigint"]
+}
+```
+
+### Via CLI
+
+```sh
+babel --plugins @babel/plugin-syntax-bigint script.js
+```
+
+### Via Node API
+
+```javascript
+require("babel-core").transform("code", {
+  plugins: ["@babel/plugin-syntax-bigint"]
+});
+```

packages/babel-plugin-syntax-bigint/package.json

@@ -0,0 +1,20 @@
+{
+  "name": "@babel/plugin-syntax-bigint",
+  "version": "7.0.0-beta.47",
+  "description": "Allow parsing of BigInt literals",
+  "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-bigint",
+  "license": "MIT",
+  "main": "lib/index.js",
+  "keywords": [
+    "babel-plugin"
+  ],
+  "dependencies": {
+    "@babel/helper-plugin-utils": "7.0.0-beta.47"
+  },
+  "peerDependencies": {
+    "@babel/core": "7.0.0-beta.47"
+  },
+  "devDependencies": {
+    "@babel/core": "7.0.0-beta.47"
+  }
+}

packages/babel-plugin-syntax-bigint/src/index.js

@@ -0,0 +1,11 @@
+import { declare } from "@babel/helper-plugin-utils";
+
+export default declare(api => {
+  api.assertVersion(7);
+
+  return {
+    manipulateOptions(opts, parserOpts) {
+      parserOpts.plugins.push("bigInt");
+    },
+  };
+});

packages/babel-types/src/definitions/experimental.js

@@ -190,3 +190,13 @@ defineType("PrivateName", {
     },
   },
 });
+
+defineType("BigIntLiteral", {
+  builder: ["value"],
+  fields: {
+    value: {
+      validate: assertValueType("string"),
+    },
+  },
+  aliases: ["Expression", "Pureish", "Literal", "Immutable"],
+});