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  1. struct A {
  2. 	operator long();
  3. };
  4.  
  5. struct B : A { 
  6. 	operator unsigned() &&;
  7. };
  8.  
  9. int main() {
  10. 	int x = B();
  11. }
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 function ‘int main()’:
prog.cpp:10:12: error: conversion from ‘B’ to ‘int’ is ambiguous
  int x = B();
            ^
prog.cpp:10:12: note: candidates are:
prog.cpp:6:2: note: B::operator unsigned int() &&
  operator unsigned() &&;
  ^
prog.cpp:2:2: note: A::operator long int()
  operator long();
  ^
prog.cpp:10:6: warning: unused variable ‘x’ [-Wunused-variable]
  int x = B();
      ^
stdout
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Standard output is empty
https://ideone.com/9cgCFT
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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