From 44d2f95d4243682d7c00326d83d59bf6ba58f08c Mon Sep 17 00:00:00 2001
From: Martin Probst <martin@probst.io>
Date: Sat, 25 Nov 2017 09:35:33 +0000
Subject: [PATCH] clang-format: [JS] do not collapse short classes.

Summary:
clang-format does not collapse short records, interfaces, unions, etc.,
but fails to do so if the record is preceded by certain modifiers
(export, default, abstract, declare). This change skips over all
modifiers, and thus handles all record definitions uniformly.

Before:
    export class Foo { bar: string; }
    class Baz {
      bam: string;
    }

After:
    export class Foo {
      bar: string;
    }
    class Baz {
      bam: string;
    }

Reviewers: djasper

Subscribers: klimek

Differential Revision: https://reviews.llvm.org/D40430

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@318976 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Format/UnwrappedLineFormatter.cpp |  9 +++++++--
 unittests/Format/FormatTestJS.cpp     | 16 ++++++++++++----
 2 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/lib/Format/UnwrappedLineFormatter.cpp b/lib/Format/UnwrappedLineFormatter.cpp
index 2e9d803a19..60dc1a7169 100644
--- a/lib/Format/UnwrappedLineFormatter.cpp
+++ b/lib/Format/UnwrappedLineFormatter.cpp
@@ -517,8 +517,13 @@ private:
       } else if (Limit != 0 && !Line.startsWith(tok::kw_namespace) &&
                  !startsExternCBlock(Line)) {
         // We don't merge short records.
-        FormatToken *RecordTok =
-            Line.First->is(tok::kw_typedef) ? Line.First->Next : Line.First;
+        FormatToken *RecordTok = Line.First;
+        // Skip record modifiers.
+        while (RecordTok->Next &&
+               RecordTok->isOneOf(tok::kw_typedef, tok::kw_export,
+                                  Keywords.kw_declare, Keywords.kw_abstract,
+                                  tok::kw_default))
+          RecordTok = RecordTok->Next;
         if (RecordTok &&
             RecordTok->isOneOf(tok::kw_class, tok::kw_union, tok::kw_struct,
                                Keywords.kw_interface))
diff --git a/unittests/Format/FormatTestJS.cpp b/unittests/Format/FormatTestJS.cpp
index 187b50221d..390772db8b 100644
--- a/unittests/Format/FormatTestJS.cpp
+++ b/unittests/Format/FormatTestJS.cpp
@@ -1674,9 +1674,15 @@ TEST_F(FormatTestJS, Modules) {
                "  x: number;\n"
                "  y: string;\n"
                "}");
-  verifyFormat("export class X { y: number; }");
-  verifyFormat("export abstract class X { y: number; }");
-  verifyFormat("export default class X { y: number }");
+  verifyFormat("export class X {\n"
+               "  y: number;\n"
+               "}");
+  verifyFormat("export abstract class X {\n"
+               "  y: number;\n"
+               "}");
+  verifyFormat("export default class X {\n"
+               "  y: number\n"
+               "}");
   verifyFormat("export default function() {\n  return 1;\n}");
   verifyFormat("export var x = 12;");
   verifyFormat("class C {}\n"
@@ -1698,7 +1704,9 @@ TEST_F(FormatTestJS, Modules) {
                "];");
   verifyFormat("export default [];");
   verifyFormat("export default () => {};");
-  verifyFormat("export interface Foo { foo: number; }\n"
+  verifyFormat("export interface Foo {\n"
+               "  foo: number;\n"
+               "}\n"
                "export class Bar {\n"
                "  blah(): string {\n"
                "    return this.blah;\n"
-- 
2.50.1