std::system_error:: operator=

Assigns the contents with those of other . If * this and other both have dynamic type std::system_error then std:: strcmp ( what ( ) , other. what ( ) ) == 0 after assignment.

Parameters

Return value

* this

Example

#include <cassert>
#include <cstring>
#include <iostream>
#include <system_error>
 
void print(const std::system_error& e)
{
    std::cout << "code:    [" << e.code() << "]\n"
                 "message: [" << e.code().message() << "]\n"
                 "what:    [" << e.what() << "]\n\n";
}
 
int main()
{
    std::system_error e1(EDOM, std::generic_category(), "Error info #1");
    print(e1);
 
    std::system_error e2(EIO, std::system_category(), "Error info #2");
    print(e2);
 
    e1 = e2;
    assert(std::strcmp(e1.what(), e2.what()) == 0);
    print(e1);
}

code:    [generic:33]
message: [Numerical argument out of domain]
what:    [Error info #1: Numerical argument out of domain]
 
code:    [system:5]
message: [Input/output error]
what:    [Error info #2: Input/output error]
 
code:    [system:5]
message: [Input/output error]
what:    [Error info #2: Input/output error]