84 lines
1.9 KiB
C++
84 lines
1.9 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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const auto& code = R"(
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bark_power = 11;
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function got_problems( error_msg )
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return "got_problems handler: " .. error_msg
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end
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function woof ( bark_energy )
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if bark_energy < 20 then
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error("*whine*")
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end
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return (bark_energy * (bark_power / 4))
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end
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function woofers ( bark_energy )
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if bark_energy < 10 then
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error("*whine*")
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end
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return (bark_energy * (bark_power / 4))
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end
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)";
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sol::state lua;
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lua.open_libraries(sol::lib::base);
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lua.script(code);
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sol::protected_function problematic_woof = lua["woof"];
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problematic_woof.set_error_handler(lua["got_problems"]);
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auto firstwoof = problematic_woof(20);
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if (firstwoof.valid()) {
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// Can work with contents
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double numwoof = firstwoof;
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std::cout << "Got value: " << numwoof << std::endl;
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}
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else {
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// An error has occured
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sol::error err = firstwoof;
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std::string what = err.what();
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std::cout << what << std::endl;
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}
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// errors, calls handler and then returns a string error
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// from Lua at the top of the stack
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auto secondwoof = problematic_woof(19);
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if (secondwoof.valid()) {
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// Call succeeded
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double numwoof = secondwoof;
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std::cout << "Got value: " << numwoof << std::endl;
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}
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else {
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// Call failed
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// Note that if the handler was successfully called,
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// this will include the additional appended error
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// message information of "got_problems handler: " ...
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sol::error err = secondwoof;
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std::string what = err.what();
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std::cout << what << std::endl;
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}
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// can also use optional to tell things
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sol::optional<double> maybevalue = problematic_woof(19);
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if (maybevalue) {
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// Have a value, use it
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double numwoof = maybevalue.value();
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std::cout << "Got value: " << numwoof << std::endl;
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}
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else {
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std::cout << "No value!" << std::endl;
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}
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std::cout << std::endl;
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return 0;
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}
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