clang-format: [JS] Allow line breaks after TypeScript type colons.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241339 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Format/TokenAnnotator.cpp

@@ -2136,6 +2136,8 @@ bool TokenAnnotator::canBreakBefore(const AnnotatedLine &Line,
   } else if (Style.Language == FormatStyle::LK_JavaScript) {
     if (Left.is(TT_JsFatArrow) && Right.is(tok::l_brace))
       return false;
+    if (Left.is(TT_JsTypeColon))
+      return true;
   }
 
   if (Left.is(tok::at))

unittests/Format/FormatTestJS.cpp

@@ -883,6 +883,8 @@ TEST_F(FormatTestJS, TypeArguments) {
   verifyFormat("class C extends D<E> implements F<G>, H<I> {}");
   verifyFormat("function f(a: List<any> = null) {}");
   verifyFormat("function f(): List<any> {}");
+  verifyFormat("function aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa():\n"
+               "    bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb {}");
 }
 
 TEST_F(FormatTestJS, OptionalTypes) {