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Author

anonymous

almost 7 years ago

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Author

anonymous

almost 7 years ago

$

prog.cc: In function 'void bad_foo()':
prog.cc:47:38: warning: ignoring returned value of type 'ResetGuard<int>', declared with attribute nodiscard [-Wunused-result]
     temporarily_set_global_value (15);
                                      ^
prog.cc:40:17: note: in call to 'ResetGuard<int> temporarily_set_global_value(int)', declared here
 ResetGuard<int> temporarily_set_global_value (int new_val)
                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
prog.cc:6:40: note: 'ResetGuard<int>' declared here
 template <class T> class [[nodiscard]] ResetGuard
                                        ^~~~~~~~~~
GLOBAL_VALUE in bad_foo () is 0
GLOBAL_VALUE in good_foo () is 15
GLOBAL_VALUE after good_foo () returns is 0
GLOBAL_VALUE in better_foo () is 15
GLOBAL_VALUE after better_foo () returns is 15
GLOBAL_VALUE after ResetGuard moved is 15
GLOBAL_VALUE after ResetGuard moved to goes out of scope is 0
GLOBAL_VALUE after ResetGuard moved from goes out of scope is 42

Exit Code:

0