[flang] Use operator<< in test.

Original-commit: flang-compiler/f18@e3f321e9f0a1995b82b33de2911ca8a1754b8e91
Reviewed-on: https://github.com/flang-compiler/f18/pull/371
Tree-same-pre-rewrite: false

diff --git a/flang/test/evaluate/expression.cc b/flang/test/evaluate/expression.cc
index 3b83b2c523970087167f503c3ded9314be00605b..0a2b21aca4925204a3065815335f6d742ff4fd28 100644 (file)
--- a/flang/test/evaluate/expression.cc
+++ b/flang/test/evaluate/expression.cc
@@ -26,7 +26,7 @@ using namespace Fortran::evaluate;
 
 template<typename A> std::string AsFortran(const A &x) {
   std::stringstream ss;
-  x.AsFortran(ss);
+  ss << x;
   return ss.str();
 }