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  1. template <typename T>
  2. struct OutputType;
  3.  
  4. int main()
  5. {
  6. OutputType<decltype(true)> a;
  7. }
Compilation error #stdin compilation error #stdout 0s 3292KB
stdin
Standard input is empty
compilation info
prog.cpp: In function ‘int main()’:
prog.cpp:6:30: error: aggregate ‘OutputType<bool> a’ has incomplete type and cannot be defined
   OutputType<decltype(true)> a;
                              ^
stdout
Standard output is empty