NAME¶

std::system_error::operator= - std::system_error::operator=

Synopsis¶

system_error& operator=( const system_error& other ) noexcept; (since C++11)

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¶

other - another system_error object to assign with

Return value¶

*this

Example¶

// Run this code

#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);
}

Possible output:¶

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]