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Added test for returning a const ref of usertype.

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And consequently having sol free up the memory of the reference
when doing garbage collection.
This commit is contained in:
Erik Ogenvik 2022-05-31 22:22:56 +02:00
parent 12d6573a10
commit 898a4ba990
1 changed files with 28 additions and 0 deletions
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28
tests/runtime_tests/source/usertypes.basic.cpp
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@ -289,3 +289,31 @@ TEST_CASE("usertype/const-pointer", "Make sure const pointers can be taken") {
REQUIRE(x == 201);
std::cout << "----- end of 6" << std::endl;
}
TEST_CASE("usertype/const-reference-no-collect", "Make sure const reference aren't collected") {
struct Foo {
bool allow_destruction = false;
~Foo() {
REQUIRE(allow_destruction);
}
};
Foo foo;
sol::state lua;
lua.new_usertype<Foo>("Foo");
lua["getFooPtr"] = [&](){ return &foo;};
lua["getFooRef"] = [&]() -> Foo& { return foo;};
lua["getFooRefConst"] = [&]() -> const Foo& { return foo;};
lua.safe_script("getFooPtr()");
//Should not collect anything.
lua.collect_gc();
lua.safe_script("getFooRef()");
//Should not collect anything.
lua.collect_gc();
lua.safe_script("getFooRefConst()");
//Should not collect anything. But it does!
lua.collect_gc();
foo.allow_destruction = true;
}