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1 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
2 
3 using size_t = decltype(sizeof(int));
4 void operator "" _x(const wchar_t *, size_t);
5 
6 namespace std_example {
7 
main()8 int main() {
9   L"A" "B" "C"_x;
10   "P"_x "Q" "R"_y; // expected-error {{differing user-defined suffixes ('_x' and '_y') in string literal concatenation}}
11 }
12 
13 }
14