clang-format: [JS] Support shebang lines on the very first line.

Summary:
Shebang lines (`#!/bin/blah`) can be used in JavaScript scripts to indicate
they should be run using e.g. node. This change treats # lines on the first line
as line comments.

Reviewers: djasper

Subscribers: klimek, cfe-commits

Differential Revision: http://reviews.llvm.org/D20632

llvm-svn: 271185

1 files changed, 7 insertions, 0 deletions

diff --git a/clang/unittests/Format/FormatTestJS.cpp b/clang/unittests/Format/FormatTestJS.cpp
index 33fd065ce49..e956ae24424 100644
--- a/clang/unittests/Format/FormatTestJS.cpp
+++ b/clang/unittests/Format/FormatTestJS.cpp
@@ -1276,5 +1276,12 @@ TEST_F(FormatTestJS, RequoteStringsLeave) {
   verifyFormat("var x = 'foo';", LeaveQuotes);
 }
 
+TEST_F(FormatTestJS, SupportShebangLines) {
+  verifyFormat("#!/usr/bin/env node\n"
+               "var x = hello();",
+               "#!/usr/bin/env node\n"
+               "var x   =  hello();");
+}
+
 } // end namespace tooling
 } // end namespace clang