62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
#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 my_exception_handler(lua_State* L,
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sol::optional<const std::exception&> maybe_exception,
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sol::string_view description) {
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// L is the lua state, which you can wrap in a state_view if
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// necessary maybe_exception will contain exception, if it
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// exists description will either be the what() of the
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// exception or a description saying that we hit the
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// general-case catch(...)
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std::cout << "An exception occurred in a function, here's "
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"what it says ";
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if (maybe_exception) {
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std::cout << "(straight from the exception): ";
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const std::exception& ex = *maybe_exception;
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std::cout << ex.what() << std::endl;
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}
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else {
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std::cout << "(from the description parameter): ";
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std::cout.write(description.data(),
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static_cast<std::streamsize>(description.size()));
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std::cout << std::endl;
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}
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// you must push 1 element onto the stack to be
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// transported through as the error object in Lua
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// note that Lua -- and 99.5% of all Lua users and libraries
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// -- expects a string so we push a single string (in our
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// case, the description of the error)
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return sol::stack::push(L, description);
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}
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void will_throw() {
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throw std::runtime_error("oh no not an exception!!!");
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}
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int main() {
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std::cout << "=== exception_handler ===" << std::endl;
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sol::state lua;
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lua.open_libraries(sol::lib::base);
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lua.set_exception_handler(&my_exception_handler);
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lua.set_function("will_throw", &will_throw);
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sol::protected_function_result pfr = lua.safe_script(
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"will_throw()", &sol::script_pass_on_error);
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SOL_ASSERT(!pfr.valid());
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sol::error err = pfr;
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std::cout << err.what() << std::endl;
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std::cout << std::endl;
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return 0;
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}
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