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  1. #include <type_traits>
  2.  
  3. extern double a[];
  4. extern double * b;
  5.  
  6. int main()
  7. {
  8.     static_assert(std::is_same<decltype(a), decltype(b)>::value, "lol");
  9. }
  10.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
prog.cpp: In function 'int main()':
prog.cpp:8:5: error: static assertion failed: lol
     static_assert(std::is_same<decltype(a), decltype(b)>::value, "lol");
     ^
stdout 
Standard output is empty
https://ideone.com/MUO0nK
An array of unspecified size is not a pointer!
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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