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  1. int f() { return 42; }   // returns by value
  2.  
  3. int main()
  4. {
  5.   const int& cir = f();  // ok: const ref to temporary object
  6.         int& ir  = f();  // snytax error: non-const ref to temporary object
  7. }
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:6:22: error: invalid initialization of non-const reference of type 'int&' from an rvalue of type 'int'
         int& ir  = f();  // snytax error: non-const ref to temporary object
                      ^
stdout
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Standard output is empty
https://ideone.com/XvTpsi
Advanced CPP: Pointers and references
Temporary objects
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
secret

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