64 lines
1.4 KiB
C++
64 lines
1.4 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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#include <iomanip>
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struct number_shim {
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double num = 0;
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};
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template <typename Handler>
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bool sol_lua_check(sol::types<number_shim>, lua_State* L,
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int index, Handler&& handler,
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sol::stack::record& tracking) {
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// check_usertype is a backdoor for directly checking sol2
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// usertypes
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if (!sol::stack::check_usertype<number_shim>(L, index)
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&& !sol::stack::check<double>(L, index)) {
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handler(L,
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index,
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sol::type_of(L, index),
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sol::type::userdata,
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"expected a number_shim or a number");
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return false;
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}
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tracking.use(1);
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return true;
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}
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number_shim sol_lua_get(sol::types<number_shim>, lua_State* L,
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int index, sol::stack::record& tracking) {
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if (sol::stack::check_usertype<number_shim>(L, index)) {
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number_shim& ns
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= sol::stack::get_usertype<number_shim>(
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L, index, tracking);
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return ns;
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}
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number_shim ns {};
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ns.num = sol::stack::get<double>(L, index, tracking);
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return ns;
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}
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int main() {
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sol::state lua;
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// Create a pass-through style of function
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lua.safe_script("function f ( a ) return a end");
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lua.set_function("g", [](double a) {
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number_shim ns;
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ns.num = a;
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return ns;
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});
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lua.script("vf = f(25) vg = g(35)");
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number_shim thingsf = lua["vf"];
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number_shim thingsg = lua["vg"];
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SOL_ASSERT(thingsf.num == 25);
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SOL_ASSERT(thingsg.num == 35);
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return 0;
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}
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