The ‘=’ is an operator in C++ STL which copies (or moves) a set to another set and set::operator= is the corresponding operator function. There are three versions of this function:
- The first version takes reference of an set as an argument and copies it to an set.
Parameters: The first version takes the reference of an set as argument.
- The second version performs a move assignment i.e it moves the content of an set to another set.
Parameters: The second version takes the r-value reference of an set as argument
- The third version assigns contents of an initializer list to an set.
Parameters: The third version takes an initializer list as argument.
Return Value: All of them return the value of this pointer(*this).
The following programs illustrates set::operator= :
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