feat: ts 3.2 support (#35) (#37)

BREAKING CHANGE: Supported TypeScript version is now 3.2

Author: JamesHenry

README.md

@@ -109,7 +109,7 @@ const astNodeTypes = parser.AST_NODE_TYPES;
 
 We will always endeavor to support the latest stable version of TypeScript.
 
-The version of TypeScript currently supported by this parser is `~3.1.1`. This is reflected in the `devDependency` requirement within the package.json file, and it is what the tests will be run against. We have an open `peerDependency` requirement in order to allow for experimentation on newer/beta versions of TypeScript.
+The version of TypeScript currently supported by this parser is `~3.2.1`. This is reflected in the `devDependency` requirement within the package.json file, and it is what the tests will be run against. We have an open `peerDependency` requirement in order to allow for experimentation on newer/beta versions of TypeScript.
 
 If you use a non-supported version of TypeScript, the parser will log a warning to the console.
 

package.json

@@ -18,6 +18,7 @@
   },
   "license": "BSD-2-Clause",
   "devDependencies": {
+    "@babel/parser": "7.1.6",
     "@commitlint/cli": "^7.1.2",
     "@commitlint/config-conventional": "^7.1.2",
     "@commitlint/travis-cli": "^7.1.2",
@@ -29,7 +30,6 @@
     "@types/semver": "^5.5.0",
     "@types/shelljs": "^0.8.0",
     "babel-code-frame": "6.26.0",
-    "babylon": "7.0.0-beta.39",
     "cz-conventional-changelog": "2.1.0",
     "glob": "7.1.2",
     "husky": "0.14.3",
@@ -41,7 +41,7 @@
     "shelljs": "0.8.2",
     "travis-deploy-once": "^5.0.8",
     "ts-jest": "^23.10.4",
-    "typescript": "~3.1.1"
+    "typescript": "~3.2.1"
   },
   "keywords": [
     "ast",

src/ast-node-types.ts

@@ -12,6 +12,7 @@ export const AST_NODE_TYPES: { [key: string]: string } = {
   AssignmentExpression: 'AssignmentExpression',
   AssignmentPattern: 'AssignmentPattern',
   AwaitExpression: 'AwaitExpression',
+  BigIntLiteral: 'BigIntLiteral',
   BinaryExpression: 'BinaryExpression',
   BlockStatement: 'BlockStatement',
   BreakStatement: 'BreakStatement',

src/convert.ts

@@ -2004,6 +2004,20 @@ export default function convert(config: ConvertConfig): ESTreeNode | null {
       });
       break;
 
+    case SyntaxKind.BigIntLiteral: {
+      const raw = ast.text.slice(
+        (result as any).range[0],
+        (result as any).range[1]
+      );
+      const value = raw.slice(0, -1); // remove suffix `n`
+      Object.assign(result, {
+        type: AST_NODE_TYPES.BigIntLiteral,
+        raw,
+        value
+      });
+      break;
+    }
+
     case SyntaxKind.RegularExpressionLiteral: {
       const pattern = (node as any).text.slice(
         1,

tests/ast-alignment/fixtures-to-test.ts

@@ -141,6 +141,7 @@ let fixturePatternConfigsToTest = [
     ]
   }),
 
+  createFixturePatternConfigFor('javascript/bigIntLiterals'),
   createFixturePatternConfigFor('javascript/binaryLiterals'),
   createFixturePatternConfigFor('javascript/blockBindings'),
 

tests/ast-alignment/parse.ts

@@ -15,7 +15,7 @@ function createError(message: string, line: number, column: number) {
 
 function parseWithBabylonPluginTypescript(text: string, parserOptions?: any) {
   parserOptions = parserOptions || {};
-  const babylon = require('babylon');
+  const babylon = require('@babel/parser');
   return babylon.parse(
     text,
     Object.assign(
@@ -28,11 +28,12 @@ function parseWithBabylonPluginTypescript(text: string, parserOptions?: any) {
           'jsx',
           'typescript',
           'objectRestSpread',
-          'decorators',
+          'decorators-legacy',
           'classProperties',
           'asyncGenerators',
           'dynamicImport',
-          'estree'
+          'estree',
+          'bigInt'
         ]
       },
       parserOptions

tests/ast-alignment/utils.ts

@@ -126,6 +126,10 @@ export function preprocessBabylonAST(ast: any): any {
     {
       key: 'guardedHandlers',
       predicate: always
+    },
+    {
+      key: 'interpreter',
+      predicate: always
     }
   ]);
 }

tests/fixtures/javascript/bigIntLiterals/binary.src.js

@@ -0,0 +1 @@
+0b1n;

tests/fixtures/javascript/bigIntLiterals/decimal.src.js

@@ -0,0 +1 @@
+1n;

tests/fixtures/javascript/bigIntLiterals/hex.src.js

@@ -0,0 +1 @@
+0x1n;

tests/fixtures/javascript/bigIntLiterals/octal.src.js

@@ -0,0 +1 @@
+0o1n;