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#define SOL_ALL_SAFETIES_ON 1
#include <sol/sol.hpp>
#include <iostream>
void some_function() {
std::cout << "some function!" << std::endl;
}
void some_other_function() {
std::cout << "some other function!" << std::endl;
}
struct some_class {
int variable = 30;
double member_function() {
return 24.5;
}
};
int main(int, char*[]) {
std::cout << "=== functions (all) ===" << std::endl;
sol::state lua;
lua.open_libraries(sol::lib::base);
// put an instance of "some_class" into lua
// (we'll go into more detail about this later
// just know here that it works and is
// put into lua as a userdata
lua.set("sc", some_class());
// binds a plain function
lua["f1"] = some_function;
lua.set_function("f2", &some_other_function);
// binds just the member function
lua["m1"] = &some_class::member_function;
// binds the class to the type
lua.set_function(
"m2", &some_class::member_function, some_class {});
// binds just the member variable as a function
lua["v1"] = &some_class::variable;
// binds class with member variable as function
lua.set_function(
"v2", &some_class::variable, some_class {});
lua.script(R"(
f1() -- some function!
f2() -- some other function!
-- need class instance if you don't bind it with the function
print(m1(sc)) -- 24.5
-- does not need class instance: was bound to lua with one
print(m2()) -- 24.5
-- need class instance if you
-- don't bind it with the function
print(v1(sc)) -- 30
-- does not need class instance:
-- it was bound with one
print(v2()) -- 30
-- can set, still
-- requires instance
v1(sc, 212)
-- can set, does not need
-- class instance: was bound with one
v2(254)
print(v1(sc)) -- 212
print(v2()) -- 254
)");
std::cout << std::endl;
return 0;
}
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