[lang-ref] ( difference ) ( cpp )

TEST(SetOperation, Difference) {
	// set_difference(...)

	set<int> a = { 1, 2, 3 };
	set<int> b = { 2, 3, 4, 5 };

	set<int> c;
	// include <algorithm> and <iterator> required
	set_difference(a.begin(), a.end(), b.begin(), b.end(), inserter(c, c.begin()));

	set<int> expected = { 1 };

	EXPECT_EQ(c, expected);
}