[c++1z] N4295: fold-expressions.

This is a new form of expression of the form:

  (expr op ... op expr)

where one of the exprs is a parameter pack. It expands into

  (expr1 op (expr2onwards op ... op expr))

(and likewise if the pack is on the right). The non-pack operand can be
omitted; in that case, an empty pack gives a fallback value or an error,
depending on the operator.

llvm-svn: 221573

1 files changed, 5 insertions, 0 deletions

diff --git a/clang/lib/AST/StmtProfile.cpp b/clang/lib/AST/StmtProfile.cpp
index 15a86769862..647b643486c 100644
--- a/clang/lib/AST/StmtProfile.cpp
+++ b/clang/lib/AST/StmtProfile.cpp
@@ -1238,6 +1238,11 @@ void StmtProfiler::VisitMaterializeTemporaryExpr(
   VisitExpr(S);
 }
 
+void StmtProfiler::VisitCXXFoldExpr(const CXXFoldExpr *S) {
+  VisitExpr(S);
+  ID.AddInteger(S->getOperator());
+}
+
 void StmtProfiler::VisitOpaqueValueExpr(const OpaqueValueExpr *E) {
   VisitExpr(E);  
 }