nikitamikhaylov commented on a change in pull request #517:
URL: https://github.com/apache/orc/pull/517#discussion_r454279531



##########
File path: c++/test/TestBloomFilter.cc
##########
@@ -152,9 +152,9 @@ namespace orc {
 
     // test strings
     bloomFilter.reset();
-    const char * emptyStr = u8"";
-    const char * enStr = u8"english";
-    const char * cnStr = u8"中国字";
+    const char * emptyStr = "";
+    const char * enStr = "english";
+    const char * cnStr = "中国字";

Review comment:
       http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0482r3.html
   
https://docs.microsoft.com/en-us/cpp/cpp/string-and-character-literals-cpp?view=vs-2019
   
   There was funny warning from clang `type of UTF-8 string literal will change 
from array of const char to array of const char8_t in C++20`
   
   And your CI said that everything is Ok.
   




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