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Compile with `c++ -std=c++=20 main.cpp`.
Tests the spaceship operator.
{{{c++
#include <iostream>
#include <compare>
#include <sstream>
int str_to_int(const char* s) {
int ret;
std::basic_istringstream<char> is(s);
is >> ret;
return ret;
}
int main(int argc, char* argv[]) {
if (argc < 3) {
std::cerr << "Give at least 2 arguments" << std::endl;
return 1;
}
int a, b;
a = str_to_int(argv[1]);
b = str_to_int(argv[2]);
std::cout << a << " <=> " << b << std::endl;
std::strong_ordering result = a <=> b;
if (std::is_lt(result)) {
std::cout << "LT";
} else if (std::is_gt(result)) {
std::cout << "GT";
} else if (std::is_eq(result)) {
std::cout << "EQ";
} else {
std::cout << "error";
}
std::cout << std::endl;
return 0;
}
}}}
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