add ostream

aeecdadf · liaogang · 027c5db3 · aeecdadf
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paddle/strings/stringpiece.h paddle/strings/stringpiece.h +1 -0

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--- a/paddle/strings/stringpiece.h
+++ b/paddle/strings/stringpiece.h
@@ -17,6 +17,7 @@
 #pragma once
 #include <string>
+#include <ostream>
 namespace paddle {