fix parser bug where arrow functions have a higher precedence than they should - fixes #2118

packages/babylon/test/fixtures/experimental/async-functions/expression-statement/actual.js

@@ -0,0 +1 @@
+async () => {}

packages/babylon/test/fixtures/experimental/async-functions/expression-statement/expected.json

@@ -0,0 +1,86 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 14,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 1,
+      "column": 14
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 14,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 1,
+        "column": 14
+      }
+    },
+    "sourceType": "script",
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start": 0,
+        "end": 14,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 1,
+            "column": 14
+          }
+        },
+        "expression": {
+          "type": "ArrowFunctionExpression",
+          "start": 0,
+          "end": 14,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 0
+            },
+            "end": {
+              "line": 1,
+              "column": 14
+            }
+          },
+          "id": null,
+          "generator": false,
+          "expression": false,
+          "async": true,
+          "params": [],
+          "body": {
+            "type": "BlockStatement",
+            "start": 12,
+            "end": 14,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 12
+              },
+              "end": {
+                "line": 1,
+                "column": 14
+              }
+            },
+            "body": [],
+            "directives": []
+          }
+        }
+      }
+    ],
+    "directives": []
+  }
+}

packages/babylon/test/fixtures/experimental/async-functions/no-callee/actual.js

@@ -0,0 +1 @@
+async () => {}()

packages/babylon/test/fixtures/experimental/async-functions/no-callee/options.json

@@ -0,0 +1,3 @@
+{
+  "throws": "Unexpected token (1:14)"
+}

packages/babylon/test/fixtures/flow/regression/issue-2154/actual.js

@@ -0,0 +1 @@
+!()=>0

packages/babylon/test/fixtures/flow/regression/issue-2154/options.json

@@ -0,0 +1,3 @@
+{
+  "throws": "Unexpected token (1:2)"
+}

packages/babylon/test/fixtures/flow/type-annotations/79/actual.js

@@ -1 +1 @@
-var foo = bar ? (foo) : number => {} : baz;
+var foo = bar ? (foo) : number => {} : baz;

packages/babylon/test/fixtures/harmony/arrow-functions/no-callee/actual.js

@@ -0,0 +1 @@
+() => {}()

packages/babylon/test/fixtures/harmony/arrow-functions/no-callee/options.json

@@ -0,0 +1,3 @@
+{
+  "throws": "Unexpected token (1:8)"
+}