[clang-format] Fix lambdas returning template specialization that contains operator in parameter

A template specialization of a template foo<int N> can contain integer constants and a whole bunch of operators - e. g.  foo< 1 ? !0 : (3+1)%4 >

Inspired by https://reviews.llvm.org/D58922

Differential Revision: https://reviews.llvm.org/D58934

llvm-svn: 355434

1 files changed, 19 insertions, 0 deletions

diff --git a/clang/lib/Format/UnwrappedLineParser.cpp b/clang/lib/Format/UnwrappedLineParser.cpp
index 5e41564793e..4bc624db7dd 100644
--- a/clang/lib/Format/UnwrappedLineParser.cpp
+++ b/clang/lib/Format/UnwrappedLineParser.cpp
@@ -1423,6 +1423,25 @@ bool UnwrappedLineParser::tryToParseLambda() {
     case tok::coloncolon:
     case tok::kw_mutable:
     case tok::kw_noexcept:
+    // Specialization of a template with an integer parameter can contain
+    // arithmetic, logical, comparison and ternary operators.
+    case tok::plus:
+    case tok::minus:
+    case tok::exclaim:
+    case tok::tilde:
+    case tok::slash:
+    case tok::percent:
+    case tok::lessless:
+    case tok::pipe:
+    case tok::pipepipe:
+    case tok::ampamp:
+    case tok::caret:
+    case tok::equalequal:
+    case tok::exclaimequal:
+    case tok::greaterequal:
+    case tok::lessequal:
+    case tok::question:
+    case tok::colon:
       nextToken();
       break;
     case tok::arrow: