Each standard library class
T that derives from class
exception
has the following publicly accessible member functions, each of them having
a non-throwing exception specification (
[except.spec]):
- default constructor (unless the class synopsis shows other constructors)
- copy constructor
- copy assignment operator
The copy constructor and the copy assignment operator meet
the following postcondition: If two objects
lhs and
rhs both have
dynamic type
T and
lhs is a copy of
rhs, then
strcmp(lhs.what(), rhs.what()) is equal to
0.