50 lines
1.0 KiB
C++
50 lines
1.0 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 << "=== protected_functions ===" << std::endl;
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sol::state lua;
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lua.open_libraries(sol::lib::base);
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// A complicated function which can error out
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// We define both in terms of Lua code
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lua.script(R"(
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function handler (message)
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return "Handled this message: " .. message
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end
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function f (a)
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if a < 0 then
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error("negative number detected")
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end
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return a + 5
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end
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)");
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// Get a protected function out of Lua
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sol::protected_function f(lua["f"], lua["handler"]);
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sol::protected_function_result result = f(-500);
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if (result.valid()) {
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// Call succeeded
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int x = result;
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std::cout << "call succeeded, result is " << x
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<< std::endl;
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}
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else {
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// Call failed
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sol::error err = result;
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std::string what = err.what();
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std::cout << "call failed, sol::error::what() is "
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<< what << std::endl;
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// 'what' Should read
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// "Handled this message: negative number detected"
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}
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std::cout << std::endl;
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}
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