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luaur_analysis/functions/
push_type.rs

1use crate::type_aliases::lua_state::lua_State;
2use crate::type_aliases::type_function_type_id::TypeFunctionTypeId;
3use luaur_vm::functions::lua_l_checkstack::lua_l_checkstack;
4use luaur_vm::functions::lua_newuserdatatagged::lua_newuserdatatagged;
5use luaur_vm::functions::lua_setmetatable::lua_setmetatable;
6use luaur_vm::macros::lua_l_getmetatable::luaL_getmetatable;
7
8// kTypeUserdataTag is a constant used for Luau Type Function userdata.
9const K_TYPE_USERDATA_TAG: i32 = 42;
10
11pub fn push_type(l: *mut lua_State, r#type: TypeFunctionTypeId) {
12    unsafe {
13        lua_l_checkstack(
14            l as *mut luaur_vm::records::lua_state::lua_State,
15            2,
16            "allocating type",
17        );
18
19        let ptr = lua_newuserdatatagged(
20            l as *mut luaur_vm::records::lua_state::lua_State,
21            core::mem::size_of::<TypeFunctionTypeId>(),
22            K_TYPE_USERDATA_TAG,
23        ) as *mut TypeFunctionTypeId;
24
25        *ptr = r#type;
26
27        // set the new userdata's metatable to type metatable
28        luaL_getmetatable(
29            l as *mut luaur_vm::records::lua_state::lua_State,
30            c"type".as_ptr(),
31        );
32        lua_setmetatable(l as *mut luaur_vm::records::lua_state::lua_State, -2);
33    }
34}