78 lines
1.6 KiB
C++
78 lines
1.6 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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sol::variadic_results call_it(sol::object function_name,
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sol::variadic_args args, sol::this_environment env,
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sol::this_state L) {
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sol::state_view lua = L;
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// default to global table as environment
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sol::environment function_environment = lua.globals();
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if (env) {
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// if we have an environment, use that instead
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function_environment = env;
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}
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// get and call the function
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sol::protected_function pf
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= function_environment[function_name];
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sol::protected_function_result res = pf(args);
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//
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sol::variadic_results results;
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if (!res.valid()) {
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// something went wrong: log/crash/whatever
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return results;
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}
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int returncount = res.return_count();
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for (int i = 0; i < returncount; i++) {
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// pass offset to get the object that was returned
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sol::object obj = res.get<sol::object>(i);
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results.push_back(obj);
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}
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// return the results
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return results;
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}
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int main(int, char*[]) {
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std::cout << "=== indirect function calls ===" << std::endl;
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sol::state lua;
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lua.open_libraries(sol::lib::base);
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lua["call_it"] = call_it;
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// some functions to call
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lua.script(R"(
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function add (a, b)
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return a + b;
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end
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function subtract (a, b)
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return a - b;
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end
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function log (x)
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print(x)
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end
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)");
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// call the functions indirectly, using a name
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lua.script(R"(
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call_it("log", "hiyo")
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call_it("log", 24)
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subtract_result = call_it("subtract", 5, 1)
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add_result = call_it("add", 5, 1)
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)");
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int subtract_result = lua["subtract_result"];
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int add_result = lua["add_result"];
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SOL_ASSERT(add_result == 6);
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SOL_ASSERT(subtract_result == 4);
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std::cout << std::endl;
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return 0;
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}
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