char foo [] = R"(foo)";
char bar [] = R"bar(bar)bar";
char empty [] = R"()";
char quote1 [] = R"34(")34";
char quote2 [] = R"0x22(foo"bar)0x22";
char sixteen [] = R"0123456789abcdef(sixteen)0123456789abcdef";
char seventeen [] = R"0123456789abcdefg(seventeen)0123456789abcdefg";
char multi_line [] = R"(First line.
Second line.
Third line.)";
char baz [] = R"baz(baz)foo";