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https://github.com/ThePhD/sol2.git
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92a6fb8c11
fix implicitly convertible function pointers from classes using `call_detail`'s `lua_call_wrapper` specificaly add documentation for working with `std::function`
63 lines
1.5 KiB
C++
63 lines
1.5 KiB
C++
#define SOL_CHECK_ARGUMENTS 1
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#include <sol.hpp>
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#include <iostream>
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#include <cassert>
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struct test {
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static int muh_variable;
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};
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int test::muh_variable = 25;
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int main() {
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std::cout << "=== static_variables example ===" << std::endl;
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sol::state lua;
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lua.open_libraries();
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lua.new_usertype<test>("test",
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"direct", sol::var(2),
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"global", sol::var(test::muh_variable),
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"ref_global", sol::var(std::ref(test::muh_variable))
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);
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int direct_value = lua["test"]["direct"];
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// direct_value == 2
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assert(direct_value == 2);
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std::cout << "direct_value: " << direct_value << std::endl;
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int global = lua["test"]["global"];
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int global2 = lua["test"]["ref_global"];
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// global == 25
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// global2 == 25
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assert(global == 25);
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assert(global2 == 25);
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std::cout << "First round of values --" << std::endl;
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std::cout << global << std::endl;
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std::cout << global2 << std::endl;
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test::muh_variable = 542;
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global = lua["test"]["global"];
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// global == 25
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// global is its own memory: was passed by value
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global2 = lua["test"]["ref_global"];
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// global2 == 542
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// global2 was passed through std::ref
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// global2 holds a reference to muh_variable
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// if muh_variable goes out of scope or is deleted
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// problems could arise, so be careful!
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assert(global == 25);
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assert(global2 == 542);
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std::cout << "Second round of values --" << std::endl;
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std::cout << "global : " << global << std::endl;
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std::cout << "global2: " << global2 << std::endl;
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std::cout << std::endl;
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return 0;
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}
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