[clang-format] Fix braced initializer with templated base class

Fixes #64134. Differential Revision: https://reviews.llvm.org/D156705

Author: Galen Elias

clang/lib/Format/UnwrappedLineParser.cpp

@@ -581,7 +581,8 @@ void UnwrappedLineParser::calculateBraceTypes(bool ExpectClassBody) {
  ProbablyBracedList =
  ProbablyBracedList ||
  (NextTok->is(tok::l_brace) && LBraceStack.back().PrevTok &&
- LBraceStack.back().PrevTok->is(tok::identifier));
+ LBraceStack.back().PrevTok->isOneOf(tok::identifier,
+ tok::greater));
 
  ProbablyBracedList =
  ProbablyBracedList ||

clang/unittests/Format/FormatTest.cpp

@@ -13458,6 +13458,8 @@ TEST_F(FormatTest, LayoutCxx11BraceInitializers) {
  verifyFormat(
  "class A {\n"
  " A() : a{} {}\n"
+ " A() : Base<int>{} {}\n"
+ " A() : Base<Foo<int>>{} {}\n"
  " A(int b) : b(b) {}\n"
  " A(int a, int b) : a(a), bs{{bs...}} { f(); }\n"
  " int a, b;\n"