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  1. #include <iostream>
  2.  
  3. auto f(int x) {
  4. 	class Unnameable {
  5.          public:
  6.        int getval() { return x; }
  7.      };
  8.     return Unnameable();
  9. }
  10.  
  11. int main() {
  12. 	auto var = f(125);
  13.     using voldemor_t = decltype(var);
  14.     int x = 56;
  15.     auto harbinger = new voldemor_t();
  16. 	std::cerr << harbinger->getval() << "\n";
  17. 	return 0;
  18. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp: In member function 'int f(int)::Unnameable::getval()':
prog.cpp:6:30: error: use of parameter from containing function
        int getval() { return x; }
                              ^
prog.cpp:3:12: note: 'int x' declared here
 auto f(int x) {
            ^
stdout
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Standard output is empty
https://ideone.com/68yySn
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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