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