1 #define SOL_ALL_SAFETIES_ON 1
2 #include <sol/sol.hpp>
3
4 #include <iostream>
5
main()6 int main() {
7 std::cout << "=== variadic_args ===" << std::endl;
8
9 sol::state lua;
10 lua.open_libraries(sol::lib::base);
11
12 // Function requires 2 arguments
13 // rest can be variadic, but:
14 // va will include everything after "a" argument,
15 // which means "b" will be part of the varaidic_args list too
16 // at position 0
17 lua.set_function("v", [](int a, sol::variadic_args va, int /*b*/) {
18 int r = 0;
19 for (auto v : va) {
20 int value = v; // get argument out (implicit conversion)
21 // can also do int v = v.as<int>();
22 // can also do int v = va.get<int>(i); with index i
23 r += value;
24 }
25 // Only have to add a, b was included from variadic_args and beyond
26 return r + a;
27 });
28
29 lua.script("x = v(25, 25)");
30 lua.script("x2 = v(25, 25, 100, 50, 250, 150)");
31 lua.script("x3 = v(1, 2, 3, 4, 5, 6)");
32 // will error: not enough arguments!
33 // lua.script("x4 = v(1)");
34
35 lua.script("assert(x == 50)");
36 lua.script("assert(x2 == 600)");
37 lua.script("assert(x3 == 21)");
38 lua.script("print(x)"); // 50
39 lua.script("print(x2)"); // 600
40 lua.script("print(x3)"); // 21
41
42 std::cout << std::endl;
43
44 return 0;
45 }