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  1. #include <iostream>
  2.  
  3. struct Matrix {
  4. 	static const int ColsAtCompileTime = 1;
  5. 	enum {RowsAtCompileTime = 42};
  6. };
  7.  
  8. void foo(const int& x) {
  9. 	std::cout << x << std::endl;
  10. }
  11.  
  12. int main() {
  13. 	foo(Matrix::RowsAtCompileTime);  // works
  14. 	foo(Matrix::ColsAtCompileTime);  // error!
  15. 	return 0;
  16. }
Compilation error #stdin compilation error #stdout 0s 3340KB
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stdin
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Standard input is empty
compilation info 
/home/VWI5SC/ccjwkTOE.o: In function `main':
prog.cpp:(.text.startup+0x20): undefined reference to `Matrix::ColsAtCompileTime'
collect2: error: ld returned 1 exit status
stdout
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Standard output is empty
https://ideone.com/K26A41
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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