From 0e7fd0741d58a34993a503e5e94bce14b4287099 Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Tue, 17 Mar 2015 11:26:06 +1100
Subject: [PATCH] inject transformer parser plugins

---
 src/babel/transformation/file/index.js  | 8 +++++++-
 src/babel/transformation/transformer.js | 6 ++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/babel/transformation/file/index.js b/src/babel/transformation/file/index.js
index a4db9cad11..a322eee31e 100644
--- a/src/babel/transformation/file/index.js
+++ b/src/babel/transformation/file/index.js
@@ -392,7 +392,13 @@ export default class File {
 
     var transformers = parseOpts.transformers = {};
     for (var key in this.transformers) {
-      transformers[key] = this.transformers[key].canParse;
+      var transformer = this.transformers[key];
+
+      transformers[key] = transformer.canTransform;
+
+      if (transformer.parser) {
+        parseOpts.plugins[key] = true;
+      }
     }
 
     parseOpts.looseModules = this.isLoose("es6.modules");
diff --git a/src/babel/transformation/transformer.js b/src/babel/transformation/transformer.js
index 552b160116..dced834a83 100644
--- a/src/babel/transformation/transformer.js
+++ b/src/babel/transformation/transformer.js
@@ -3,6 +3,7 @@ import isFunction from "lodash/lang/isFunction";
 import traverse from "../traversal";
 import isObject from "lodash/lang/isObject";
 import assign from "lodash/object/assign";
+import acorn from "../../../../acorn";
 import File from "./file";
 import each from "lodash/collection/each";
 
@@ -24,6 +25,7 @@ export default class Transformer {
 
     this.manipulateOptions = take("manipulateOptions");
     this.metadata          = take("metadata") || {};
+    this.parser            = take("parser");
     this.check             = take("check");
     this.post              = take("post");
     this.pre               = take("pre");
@@ -31,6 +33,10 @@ export default class Transformer {
     this.handlers = this.normalize(transformer);
     this.opts     ||= {};
     this.key      = transformerKey;
+
+    if (this.parser) {
+      acorn.plugins[key] = this.parser(acorn.Parser.prototype, acorn.tokTypes);
+    }
   }
 
   normalize(transformer: Object): Object {