Pull in full sqlite_modern_cpp repo for the license as it is not attached to source files

common/sqlite_modern_cpp/tests/functors.cc

@@ -0,0 +1,39 @@
+#include <iostream>
+#include <vector>
+#include <algorithm>
+#include <string>
+#include <sqlite_modern_cpp.h>
+#include <catch2/catch.hpp>
+
+using namespace sqlite;
+using namespace std;
+
+struct tbl_functor {
+  explicit tbl_functor(vector<pair<int, string> > &vec_) : vec(vec_) { }
+
+  void operator() ( int id, string name) {
+    vec.push_back(make_pair(id, move(name)));
+  }
+  vector<pair<int,string> > &vec;
+};
+
+TEST_CASE("functors work", "[functors]") {
+    database db(":memory:");
+    db << "CREATE TABLE tbl (id integer, name string);";
+    db << "INSERT INTO tbl VALUES (?, ?);" << 1 << "hello";
+    db << "INSERT INTO tbl VALUES (?, ?);" << 2 << "world";
+
+    vector<pair<int,string> > vec;
+    db << "select id,name from tbl;" >> tbl_functor(vec);
+
+    REQUIRE(vec.size() == 2);
+
+    vec.clear();
+
+    tbl_functor functor(vec);
+    db << "select id,name from tbl;" >> functor;
+
+    REQUIRE(vec.size() == 2);
+    REQUIRE(vec[0].first == 1);
+    REQUIRE(vec[0].second == "hello");
+}