From 6933d16125995c6d1cd3280f986ff93d26d646f4 Mon Sep 17 00:00:00 2001
From: Christopher Chedeau <vjeuxx@gmail.com>
Date: Fri, 2 Jun 2017 14:40:39 -0700
Subject: [PATCH] Inline decorators with no arguments (#1910)

Fixes #1898
---
 src/printer.js                                  |  9 +++++----
 .../__snapshots__/jsfmt.spec.js.snap            | 17 +++++++++++++++--
 tests/typescript_decorators/decorators.js       |  7 +++++++
 3 files changed, 27 insertions(+), 6 deletions(-)

diff --git a/src/printer.js b/src/printer.js
index d28ab891b..b8270ccd6 100644
--- a/src/printer.js
+++ b/src/printer.js
@@ -100,10 +100,11 @@ function genericPrint(path, options, printPath, args) {
         (decorator.type === "Identifier" ||
           decorator.type === "MemberExpression" ||
           (decorator.type === "CallExpression" &&
-            decorator.arguments.length === 1 &&
-            (isStringLiteral(decorator.arguments[0]) ||
-              decorator.arguments[0].type === "Identifier" ||
-              decorator.arguments[0].type === "MemberExpression")))
+            (decorator.arguments.length === 0 ||
+              (decorator.arguments.length === 1 &&
+                (isStringLiteral(decorator.arguments[0]) ||
+                  decorator.arguments[0].type === "Identifier" ||
+                  decorator.arguments[0].type === "MemberExpression")))))
       ) {
         separator = " ";
       }
diff --git a/tests/typescript_decorators/__snapshots__/jsfmt.spec.js.snap b/tests/typescript_decorators/__snapshots__/jsfmt.spec.js.snap
index 3d7fd3ef3..1b1aee030 100644
--- a/tests/typescript_decorators/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/typescript_decorators/__snapshots__/jsfmt.spec.js.snap
@@ -11,6 +11,13 @@ export class TestTextFileService {
 @commonEditorContribution
 export class TabCompletionController {
 }
+
+@Component({
+  selector: 'angular-component',
+})
+class AngularComponent {
+  @Input() myInput: string;
+}
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 export class TestTextFileService {
   constructor(@ILifecycleService lifecycleService) {}
@@ -19,6 +26,13 @@ export class TestTextFileService {
 @commonEditorContribution
 export class TabCompletionController {}
 
+@Component({
+  selector: "angular-component"
+})
+class AngularComponent {
+  @Input() myInput: string;
+}
+
 `;
 
 exports[`inline-decorators.ts 1`] = `
@@ -95,8 +109,7 @@ class Class3 {
   @d1 fieldA;
   @d2(foo) fieldB;
   @d3.bar fieldC;
-  @d4.baz()
-  fieldD;
+  @d4.baz() fieldD;
 
   constructor(
     @d1 private x: number,
diff --git a/tests/typescript_decorators/decorators.js b/tests/typescript_decorators/decorators.js
index f8210c53e..3224863b2 100644
--- a/tests/typescript_decorators/decorators.js
+++ b/tests/typescript_decorators/decorators.js
@@ -8,3 +8,10 @@ export class TestTextFileService {
 @commonEditorContribution
 export class TabCompletionController {
 }
+
+@Component({
+  selector: 'angular-component',
+})
+class AngularComponent {
+  @Input() myInput: string;
+}