clang-format: [JS] handle destructuring `of`.

Summary:
Previously, clang-format would drop a space character between `of` and
then following (non-identifier) token if the preceding token was part of
a destructuring assignment (`}` or `]`).

Before:
    for (const [a, b] of[]) {}

After:
    for (const [a, b] of []) {}

Reviewers: djasper

Subscribers: klimek

Differential Revision: https://reviews.llvm.org/D40411

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@318942 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 0 deletions

diff --git a/unittests/Format/FormatTestJS.cpp b/unittests/Format/FormatTestJS.cpp
index 3e5abdc098..d9176599fb 100644
--- a/unittests/Format/FormatTestJS.cpp
+++ b/unittests/Format/FormatTestJS.cpp
@@ -1110,6 +1110,10 @@ TEST_F(FormatTestJS, ForLoops) {
                "}");
   verifyFormat("for (let {a, b} of x) {\n"
                "}");
+  verifyFormat("for (let {a, b} of [x]) {\n"
+               "}");
+  verifyFormat("for (let [a, b] of [x]) {\n"
+               "}");
   verifyFormat("for (let {a, b} in x) {\n"
                "}");
 }