49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
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#define SOL_ALL_SAFETIES_ON 1
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#include <sol/sol.hpp>
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#include <iostream>
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int main() {
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std::cout << "=== variadic_args ===" << std::endl;
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sol::state lua;
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lua.open_libraries(sol::lib::base);
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// Function requires 2 arguments
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// rest can be variadic, but:
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// va will include everything after "a" argument,
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// which means "b" will be part of the varaidic_args list
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// too at position 0
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lua.set_function(
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"v", [](int a, sol::variadic_args va, int /*b*/) {
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int r = 0;
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for (auto v : va) {
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int value
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= v; // get argument out (implicit
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// conversion) can also do int v =
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// v.as<int>(); can also do int v =
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// va.get<int>(i); with index i
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r += value;
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}
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// Only have to add a, b was included from
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// variadic_args and beyond
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return r + a;
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});
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lua.script("x = v(25, 25)");
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lua.script("x2 = v(25, 25, 100, 50, 250, 150)");
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lua.script("x3 = v(1, 2, 3, 4, 5, 6)");
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// will error: not enough arguments!
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// lua.script("x4 = v(1)");
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lua.script("assert(x == 50)");
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lua.script("assert(x2 == 600)");
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lua.script("assert(x3 == 21)");
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lua.script("print(x)"); // 50
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lua.script("print(x2)"); // 600
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lua.script("print(x3)"); // 21
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std::cout << std::endl;
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return 0;
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}
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