From: Martin Probst <martin@probst.io>
Date: Tue, 6 Sep 2016 18:39:30 +0000 (+0000)
Subject: clang-format: [JS] ignore comments when wrapping returns.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0859ba1b26743c8c9d0ae6d1c6e1efc4809927eb;p=clang

clang-format: [JS] ignore comments when wrapping returns.

Summary:
When code contains a comment between `return` and the value:

    return /* lengthy comment here */ (
        lengthyValueComesHere);

Do not wrap before the comment, as that'd break the code through JS' automatic
semicolon insertion.

Reviewers: djasper

Subscribers: klimek, cfe-commits

Differential Revision: https://reviews.llvm.org/D24257

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@280730 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Format/TokenAnnotator.cpp b/lib/Format/TokenAnnotator.cpp
index 7f201119a7..0708593981 100644
--- a/lib/Format/TokenAnnotator.cpp
+++ b/lib/Format/TokenAnnotator.cpp
@@ -2381,7 +2381,12 @@ bool TokenAnnotator::canBreakBefore(const AnnotatedLine &Line,
                       Keywords.kw_implements))
       return true;
   } else if (Style.Language == FormatStyle::LK_JavaScript) {
-    if (Left.is(tok::kw_return))
+    const FormatToken *NonComment = Right.getPreviousNonComment();
+    if (Left.isOneOf(tok::kw_return, tok::kw_continue, tok::kw_break,
+                     tok::kw_throw) ||
+        (NonComment &&
+         NonComment->isOneOf(tok::kw_return, tok::kw_continue, tok::kw_break,
+                             tok::kw_throw)))
       return false; // Otherwise a semicolon is inserted.
     if (Left.is(TT_JsFatArrow) && Right.is(tok::l_brace))
       return false;
diff --git a/unittests/Format/FormatTestJS.cpp b/unittests/Format/FormatTestJS.cpp
index ed227852ef..17d5cd58f1 100644
--- a/unittests/Format/FormatTestJS.cpp
+++ b/unittests/Format/FormatTestJS.cpp
@@ -686,7 +686,9 @@ TEST_F(FormatTestJS, WrapRespectsAutomaticSemicolonInsertion) {
   // would change due to automatic semicolon insertion.
   // See http://www.ecma-international.org/ecma-262/5.1/#sec-7.9.1.
   verifyFormat("return aaaaa;", getGoogleJSStyleWithColumns(10));
+  verifyFormat("return /* hello! */ aaaaa;", getGoogleJSStyleWithColumns(10));
   verifyFormat("continue aaaaa;", getGoogleJSStyleWithColumns(10));
+  verifyFormat("continue /* hello! */ aaaaa;", getGoogleJSStyleWithColumns(10));
   verifyFormat("break aaaaa;", getGoogleJSStyleWithColumns(10));
   verifyFormat("throw aaaaa;", getGoogleJSStyleWithColumns(10));
   verifyFormat("aaaaaaaaa++;", getGoogleJSStyleWithColumns(10));