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45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
#define SOL_CHECK_ARGUMENTS 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 too
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// at position 0
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lua.set_function("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 = v; // get argument out (implicit conversion)
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// can also do int v = v.as<int>();
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// can also do int v = 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 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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} |