clang-format: [JS] parse async function declarations.

Summary:
Previously, clang-format would accidentally parse an async function
declaration as a function expression, and thus not insert an unwrapped
line for async functions, causing subsequent functions to run into the
function:

    async function f() {
      x();
    } function g() { ...

With this change, async functions get parsed as top level function
declarations and get their own unwrapped line context.

Reviewers: djasper

Subscribers: klimek, cfe-commits

Differential Revision: https://reviews.llvm.org/D32590

llvm-svn: 301538

1 files changed, 17 insertions, 0 deletions

diff --git a/clang/unittests/Format/FormatTestJS.cpp b/clang/unittests/Format/FormatTestJS.cpp
index 7886c4fe27a..eda9e0a31da 100644
--- a/clang/unittests/Format/FormatTestJS.cpp
+++ b/clang/unittests/Format/FormatTestJS.cpp
@@ -485,6 +485,20 @@ TEST_F(FormatTestJS, AsyncFunctions) {
                "  let x = 1;\n"
                "  return fetch(x);\n"
                "}");
+  verifyFormat("async function f() {\n"
+               "  return 1;\n"
+               "}\n"
+               "\n"
+               "function a() {\n"
+               "  return 1;\n"
+               "}\n",
+               "  async   function f() {\n"
+               "   return 1;\n"
+               "}\n"
+               "\n"
+               "   function a() {\n"
+               "  return   1;\n"
+               "}  \n");
   verifyFormat("async function* f() {\n"
                "  yield fetch(x);\n"
                "}");
@@ -492,6 +506,9 @@ TEST_F(FormatTestJS, AsyncFunctions) {
                "  return fetch(x);\n"
                "}");
   verifyFormat("let x = async () => f();");
+  verifyFormat("let x = async function() {\n"
+               "  f();\n"
+               "};");
   verifyFormat("let x = async();");
   verifyFormat("class X {\n"
                "  async asyncMethod() {\n"