New: Mark optional parameters (fixes eslint#186)

Author: Pajn

lib/ast-converter.js

@@ -752,6 +752,9 @@ module.exports = function(ast, extra) {
                     type: "Identifier",
                     name: ts.unescapeIdentifier(node.text)
                 });
+                if (node.parent.questionToken && SyntaxKind.Parameter === node.parent.kind) {
+                    result.optional = true;
+                }
                 break;
 
             case SyntaxKind.WithStatement:

tests/fixtures/typescript/basics/non-null-assertion-operator.result.js

@@ -70,6 +70,7 @@ module.exports = {
                         }
                     },
                     "name": "e",
+                    "optional": true,
                     "typeAnnotation": {
                         "type": "TypeAnnotation",
                         "loc": {
@@ -760,4 +761,4 @@ module.exports = {
             }
         }
     ]
-};
+};