eslint · JamesHenry · Jan 4, 2017 · Dec 18, 2016 · Dec 18, 2016
diff --git a/lib/ast-converter.js b/lib/ast-converter.js
@@ -105,6 +105,17 @@ function isESTreeClassMember(node) {
     return node.kind !== SyntaxKind.SemicolonClassElement;
 }
 
+/**
+ * Returns true if the given node is an async function
+ * @param  {TSNode}  node TypeScript AST node
+ * @returns {boolean}     is an async function
+ */
+function isAsyncFunction(node) {
+    return !!node.modifiers && !!node.modifiers.length && node.modifiers.some(function(modifier) {
+        return modifier.kind === SyntaxKind.AsyncKeyword;
+    });
+}
+
 /**
  * Returns true if the given TSToken is a comma
  * @param  {TSToken}  token the TypeScript token
@@ -852,6 +863,7 @@ module.exports = function(ast, extra) {
                     id: convertChild(node.name),
                     generator: !!node.asteriskToken,
                     expression: false,
+                    async: isAsyncFunction(node),
                     params: node.parameters.map(convertChild),
                     body: convertChild(node.body)
                 });
@@ -1057,6 +1069,7 @@ module.exports = function(ast, extra) {
                         id: null,
                         generator: false,
                         expression: false,
+                        async: isAsyncFunction(node),
                         body: convertChild(node.body),
                         range: [ node.name.end, result.range[1]],
                         loc: {
@@ -1158,6 +1171,7 @@ module.exports = function(ast, extra) {
                         }),
                         generator: false,
                         expression: false,
+                        async: false,
                         body: convertChild(node.body),
                         range: [ result.range[0] + constructorStartOffset, result.range[1]],
                         loc: {
@@ -1226,6 +1240,7 @@ module.exports = function(ast, extra) {
                     generator: !!node.asteriskToken,
                     params: node.parameters.map(convertChild),
                     body: convertChild(node.body),
+                    async: isAsyncFunction(node),
                     expression: false
                 });
                 // Process returnType
@@ -1308,6 +1323,7 @@ module.exports = function(ast, extra) {
                     id: null,
                     params: node.parameters.map(convertChild),
                     body: convertChild(node.body),
+                    async: isAsyncFunction(node),
                     expression: node.body.kind !== SyntaxKind.Block
                 });
                 // Process returnType
@@ -1328,6 +1344,13 @@ module.exports = function(ast, extra) {
                 });
                 break;
 
+            case SyntaxKind.AwaitExpression:
+                assign(result, {
+                    type: "AwaitExpression",
+                    expression: convertChild(node.expression)
+                });
+                break;
+
             // Template Literals
 
             case SyntaxKind.NoSubstitutionTemplateLiteral:

diff --git a/lib/ast-node-types.js b/lib/ast-node-types.js
@@ -23,6 +23,7 @@ module.exports = {
     ArrayExpression: "ArrayExpression",
     ArrayPattern: "ArrayPattern",
     ArrowFunctionExpression: "ArrowFunctionExpression",
+    AwaitExpression: "AwaitExpression",
     BlockStatement: "BlockStatement",
     BinaryExpression: "BinaryExpression",
     BreakStatement: "BreakStatement",

diff --git a/tests/fixtures/attach-comments/export-default-anonymous-class.result.js b/tests/fixtures/attach-comments/export-default-anonymous-class.result.js
@@ -56,6 +56,7 @@ module.exports = {
                                 },
                                 "generator": false,
                                 "expression": false,
+                                "async": false,
                                 "range": [
                                     110,
                                     119

diff --git a/tests/fixtures/attach-comments/surrounding-call-comments.result.js b/tests/fixtures/attach-comments/surrounding-call-comments.result.js
@@ -123,6 +123,7 @@ module.exports = {
                 ]
             },
             "expression": false,
+            "async": false,
             "generator": false
         }
     ],

diff --git a/tests/fixtures/attach-comments/surrounding-debugger-comments.result.js b/tests/fixtures/attach-comments/surrounding-debugger-comments.result.js
@@ -87,6 +87,7 @@ module.exports = {
                 ]
             },
             "expression": false,
+            "async": false,
             "generator": false
         }
     ],

diff --git a/tests/fixtures/attach-comments/surrounding-return-comments.result.js b/tests/fixtures/attach-comments/surrounding-return-comments.result.js
@@ -88,6 +88,7 @@ module.exports = {
                 ]
             },
             "expression": false,
+            "async": false,
             "generator": false
         }
     ],

diff --git a/tests/fixtures/attach-comments/surrounding-throw-comments.result.js b/tests/fixtures/attach-comments/surrounding-throw-comments.result.js
@@ -106,6 +106,7 @@ module.exports = {
                 ]
             },
             "expression": false,
+            "async": false,
             "generator": false
         }
     ],

diff --git a/tests/fixtures/attach-comments/surrounding-while-loop-comments.result.js b/tests/fixtures/attach-comments/surrounding-while-loop-comments.result.js
@@ -51,6 +51,7 @@ module.exports = {
             },
             "generator": false,
             "expression": false,
+            "async": false,
             "params": [],
             "body": {
                 "type": "BlockStatement",

diff --git a/tests/fixtures/attach-comments/switch-fallthrough-comment-in-function.result.js b/tests/fixtures/attach-comments/switch-fallthrough-comment-in-function.result.js
@@ -254,6 +254,7 @@ module.exports = {
                 ]
             },
             "expression": false,
+            "async": false,
             "generator": false
         }
     ],

diff --git a/tests/fixtures/attach-comments/switch-no-default-comment-in-function.result.js b/tests/fixtures/attach-comments/switch-no-default-comment-in-function.result.js
@@ -238,6 +238,7 @@ module.exports = {
                 ]
             },
             "expression": false,
+            "async": false,
             "generator": false
         }
     ],

diff --git a/tests/fixtures/attach-comments/switch-no-default-comment-in-nested-functions.result.js b/tests/fixtures/attach-comments/switch-no-default-comment-in-nested-functions.result.js
@@ -630,11 +630,13 @@ module.exports = {
                                     ]
                                 },
                                 "expression": false,
+                                "async": false,
                                 "generator": false
                             }
                         ]
                     },
                     "expression": false,
+                    "async": false,
                     "generator": false
                 }
             }

diff --git a/tests/fixtures/basics/new-without-parens.result.js b/tests/fixtures/basics/new-without-parens.result.js
@@ -51,6 +51,7 @@ module.exports = {
             },
             "generator": false,
             "expression": false,
+            "async": false,
             "params": [],
             "body": {
                 "type": "BlockStatement",

diff --git a/tests/fixtures/basics/update-expression.result.js b/tests/fixtures/basics/update-expression.result.js
@@ -148,8 +148,9 @@ module.exports = {
                 ],
                 "type": "BlockStatement"
             },
-            "expression": false,
             "generator": false,
+            "expression": false,
+            "async": false,
             "id": {
                 "loc": {
                     "end": {

diff --git a/tests/fixtures/ecma-features-mix/classes-and-generators/classes-and-generators.result.js b/tests/fixtures/ecma-features-mix/classes-and-generators/classes-and-generators.result.js
@@ -70,6 +70,7 @@ module.exports = {
                             },
                             "generator": true,
                             "expression": false,
+                            "async": false,
                             "range": [
                                 17,
                                 24

diff --git a/tests/fixtures/ecma-features-mix/classes-and-generators/computed-generator.result.js b/tests/fixtures/ecma-features-mix/classes-and-generators/computed-generator.result.js
@@ -106,6 +106,7 @@ module.exports = {
                             },
                             "generator": true,
                             "expression": false,
+                            "async": false,
                             "range": [
                                 31,
                                 38

diff --git a/tests/fixtures/ecma-features-mix/classes-and-generators/static-generators.result.js b/tests/fixtures/ecma-features-mix/classes-and-generators/static-generators.result.js
@@ -70,6 +70,7 @@ module.exports = {
                             },
                             "generator": true,
                             "expression": false,
+                            "async": false,
                             "range": [
                                 24,
                                 31

diff --git a/...fixtures/ecma-features-mix/defaultParams-and-arrowFunctions/default-param-arrow.result.js b/...fixtures/ecma-features-mix/defaultParams-and-arrowFunctions/default-param-arrow.result.js
@@ -88,6 +88,7 @@ module.exports = {
                             },
                             "generator": false,
                             "expression": false,
+                            "async": false,
                             "range": [
                                 6,
                                 13
@@ -139,6 +140,7 @@ module.exports = {
                 },
                 "generator": false,
                 "expression": false,
+                "async": false,
                 "range": [
                     0,
                     20

diff --git a/tests/fixtures/ecma-features-mix/defaultParams-and-arrowFunctions/default-param.result.js b/tests/fixtures/ecma-features-mix/defaultParams-and-arrowFunctions/default-param.result.js
@@ -118,6 +118,7 @@ module.exports = {
                 },
                 "generator": false,
                 "expression": true,
+                "async": false,
                 "range": [
                     0,
                     14

diff --git a/tests/fixtures/ecma-features-mix/defaultParams-and-arrowFunctions/local-eval-multi.result.js b/tests/fixtures/ecma-features-mix/defaultParams-and-arrowFunctions/local-eval-multi.result.js
@@ -101,6 +101,7 @@ module.exports = {
                 },
                 "generator": false,
                 "expression": true,
+                "async": false,
                 "range": [
                     0,
                     20
@@ -329,4 +330,4 @@ module.exports = {
             }
         }
     ]
-};
+};
diff --git a/tests/fixtures/ecma-features-mix/defaultParams-and-arrowFunctions/local-eval.result.js b/tests/fixtures/ecma-features-mix/defaultParams-and-arrowFunctions/local-eval.result.js
@@ -83,6 +83,7 @@ module.exports = {
                 },
                 "generator": false,
                 "expression": true,
+                "async": false,
                 "range": [
                     0,
                     17
@@ -275,4 +276,4 @@ module.exports = {
             }
         }
     ]
-};
+};
diff --git a/...fixtures/ecma-features-mix/defaultParams-and-arrowFunctions/yield-default-param.result.js b/...fixtures/ecma-features-mix/defaultParams-and-arrowFunctions/yield-default-param.result.js
@@ -105,6 +105,7 @@ module.exports = {
                             },
                             "generator": false,
                             "expression": false,
+                            "async": false,
                             "range": [
                                 16,
                                 33
@@ -153,6 +154,7 @@ module.exports = {
             },
             "generator": true,
             "expression": false,
+            "async": false,
             "range": [
                 0,
                 35
@@ -456,4 +458,4 @@ module.exports = {
             }
         }
     ]
-};
+};
diff --git a/...s/fixtures/ecma-features-mix/destructuring-and-arrowFunctions/arrow-param-array.result.js b/...s/fixtures/ecma-features-mix/destructuring-and-arrowFunctions/arrow-param-array.result.js
@@ -65,6 +65,7 @@ module.exports = {
                 },
                 "generator": false,
                 "expression": true,
+                "async": false,
                 "range": [
                     0,
                     10
@@ -257,4 +258,4 @@ module.exports = {
             }
         }
     ]
-};
+};
diff --git a/...res/ecma-features-mix/destructuring-and-arrowFunctions/arrow-param-nested-array.result.js b/...res/ecma-features-mix/destructuring-and-arrowFunctions/arrow-param-nested-array.result.js
@@ -102,6 +102,7 @@ module.exports = {
                 },
                 "generator": false,
                 "expression": true,
+                "async": false,
                 "range": [
                     0,
                     15
@@ -366,4 +367,4 @@ module.exports = {
             }
         }
     ]
-};
+};
diff --git a/...a-features-mix/destructuring-and-arrowFunctions/arrow-param-nested-object-named.result.js b/...a-features-mix/destructuring-and-arrowFunctions/arrow-param-nested-object-named.result.js
@@ -219,6 +219,7 @@ module.exports = {
                 },
                 "generator": false,
                 "expression": true,
+                "async": false,
                 "range": [
                     0,
                     27
@@ -591,4 +592,4 @@ module.exports = {
             }
         }
     ]
-};
+};
diff --git a/...es/ecma-features-mix/destructuring-and-arrowFunctions/arrow-param-nested-object.result.js b/...es/ecma-features-mix/destructuring-and-arrowFunctions/arrow-param-nested-object.result.js
@@ -219,6 +219,7 @@ module.exports = {
                 },
                 "generator": false,
                 "expression": true,
+                "async": false,
                 "range": [
                     0,
                     17
@@ -519,4 +520,4 @@ module.exports = {
             }
         }
     ]
-};
+};
diff --git a/.../fixtures/ecma-features-mix/destructuring-and-arrowFunctions/arrow-param-object.result.js b/.../fixtures/ecma-features-mix/destructuring-and-arrowFunctions/arrow-param-object.result.js
@@ -104,6 +104,7 @@ module.exports = {
                 },
                 "generator": false,
                 "expression": true,
+                "async": false,
                 "range": [
                     0,
                     10
@@ -296,4 +297,4 @@ module.exports = {
             }
         }
     ]
-};
+};
diff --git a/...ixtures/ecma-features-mix/destructuring-and-arrowFunctions/param-defaults-array.result.js b/...ixtures/ecma-features-mix/destructuring-and-arrowFunctions/param-defaults-array.result.js
@@ -101,6 +101,7 @@ module.exports = {
                 },
                 "generator": false,
                 "expression": true,
+                "async": false,
                 "range": [
                     0,
                     15

diff --git a/...ecma-features-mix/destructuring-and-arrowFunctions/param-defaults-object-nested.result.js b/...ecma-features-mix/destructuring-and-arrowFunctions/param-defaults-object-nested.result.js
@@ -328,6 +328,7 @@ module.exports = {
                 },
                 "generator": false,
                 "expression": true,
+                "async": false,
                 "range": [
                     0,
                     35

diff --git a/...xtures/ecma-features-mix/destructuring-and-arrowFunctions/param-defaults-object.result.js b/...xtures/ecma-features-mix/destructuring-and-arrowFunctions/param-defaults-object.result.js
@@ -140,6 +140,7 @@ module.exports = {
                 },
                 "generator": false,
                 "expression": true,
+                "async": false,
                 "range": [
                     0,
                     15

diff --git a/tests/fixtures/ecma-features-mix/destructuring-and-defaultParams/param-array.result.js b/tests/fixtures/ecma-features-mix/destructuring-and-defaultParams/param-array.result.js
@@ -135,6 +135,7 @@ module.exports = {
             },
             "generator": false,
             "expression": false,
+            "async": false,
             "range": [
                 0,
                 24
@@ -437,4 +438,4 @@ module.exports = {
             }
         }
     ]
-};
+};
-Original file line number
+Diff line change
@@ Expand Up / @@ -123,6 +123,7 @@ module.exports = { @@
                     ]
                 },
                 "expression": false,
+                "async": false,
                 "generator": false
             }
         ],
@@ Expand Down @@