700 lines
20 KiB
Rust
700 lines
20 KiB
Rust
use std::sync::Arc;
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#[cfg(not(feature = "parking_lot"))]
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use std::sync::{Mutex, RwLock};
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#[cfg(feature = "parking_lot")]
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use parking_lot::{Mutex, RwLock};
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#[cfg(not(feature = "send"))]
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use std::{cell::RefCell, rc::Rc};
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#[cfg(feature = "lua54")]
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use std::sync::atomic::{AtomicI64, Ordering};
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use mlua::{
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AnyUserData, Error, ExternalError, Function, Lua, MetaMethod, Nil, Result, String, UserData,
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UserDataFields, UserDataMethods, Value,
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};
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#[test]
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fn test_user_data() -> Result<()> {
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struct UserData1(i64);
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struct UserData2(Box<i64>);
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impl UserData for UserData1 {}
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impl UserData for UserData2 {}
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let lua = Lua::new();
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let userdata1 = lua.create_userdata(UserData1(1))?;
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let userdata2 = lua.create_userdata(UserData2(Box::new(2)))?;
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assert!(userdata1.is::<UserData1>());
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assert!(!userdata1.is::<UserData2>());
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assert!(userdata2.is::<UserData2>());
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assert!(!userdata2.is::<UserData1>());
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assert_eq!(userdata1.borrow::<UserData1>()?.0, 1);
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assert_eq!(*userdata2.borrow::<UserData2>()?.0, 2);
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Ok(())
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}
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#[test]
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fn test_methods() -> Result<()> {
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#[cfg_attr(feature = "serialize", derive(serde::Serialize))]
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struct MyUserData(i64);
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impl UserData for MyUserData {
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fn add_methods<'lua, M: UserDataMethods<'lua, Self>>(methods: &mut M) {
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methods.add_method("get_value", |_, data, ()| Ok(data.0));
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methods.add_method_mut("set_value", |_, data, args| {
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data.0 = args;
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Ok(())
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});
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}
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}
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fn check_methods(lua: &Lua, userdata: AnyUserData) -> Result<()> {
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let globals = lua.globals();
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globals.set("userdata", userdata.clone())?;
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lua.load(
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r#"
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function get_it()
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return userdata:get_value()
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end
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function set_it(i)
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return userdata:set_value(i)
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end
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"#,
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)
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.exec()?;
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let get = globals.get::<_, Function>("get_it")?;
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let set = globals.get::<_, Function>("set_it")?;
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assert_eq!(get.call::<_, i64>(())?, 42);
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userdata.borrow_mut::<MyUserData>()?.0 = 64;
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assert_eq!(get.call::<_, i64>(())?, 64);
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set.call::<_, ()>(100)?;
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assert_eq!(get.call::<_, i64>(())?, 100);
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Ok(())
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}
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let lua = Lua::new();
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check_methods(&lua, lua.create_userdata(MyUserData(42))?)?;
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// Additionally check serializable userdata
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#[cfg(feature = "serialize")]
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check_methods(&lua, lua.create_ser_userdata(MyUserData(42))?)?;
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Ok(())
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}
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#[test]
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fn test_metamethods() -> Result<()> {
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#[derive(Copy, Clone)]
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struct MyUserData(i64);
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impl UserData for MyUserData {
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fn add_methods<'lua, M: UserDataMethods<'lua, Self>>(methods: &mut M) {
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methods.add_method("get", |_, data, ()| Ok(data.0));
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methods.add_meta_function(
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MetaMethod::Add,
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|_, (lhs, rhs): (MyUserData, MyUserData)| Ok(MyUserData(lhs.0 + rhs.0)),
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);
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methods.add_meta_function(
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MetaMethod::Sub,
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|_, (lhs, rhs): (MyUserData, MyUserData)| Ok(MyUserData(lhs.0 - rhs.0)),
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);
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methods.add_meta_function(MetaMethod::Eq, |_, (lhs, rhs): (MyUserData, MyUserData)| {
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Ok(lhs.0 == rhs.0)
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});
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methods.add_meta_method(MetaMethod::Index, |_, data, index: String| {
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if index.to_str()? == "inner" {
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Ok(data.0)
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} else {
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Err("no such custom index".to_lua_err())
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}
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});
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#[cfg(any(
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feature = "lua54",
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feature = "lua53",
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feature = "lua52",
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feature = "luajit52"
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))]
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methods.add_meta_method(MetaMethod::Pairs, |lua, data, ()| {
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use std::iter::FromIterator;
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let stateless_iter = lua.create_function(|_, (data, i): (MyUserData, i64)| {
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let i = i + 1;
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if i <= data.0 {
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return Ok(mlua::Variadic::from_iter(vec![i, i]));
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}
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return Ok(mlua::Variadic::new());
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})?;
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Ok((stateless_iter, data.clone(), 0))
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});
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}
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}
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let lua = Lua::new();
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let globals = lua.globals();
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globals.set("userdata1", MyUserData(7))?;
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globals.set("userdata2", MyUserData(3))?;
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globals.set("userdata3", MyUserData(3))?;
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assert_eq!(
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lua.load("userdata1 + userdata2").eval::<MyUserData>()?.0,
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10
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);
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#[cfg(any(
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feature = "lua54",
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feature = "lua53",
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feature = "lua52",
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feature = "luajit52"
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))]
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let pairs_it = lua
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.load(
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r#"
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function()
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local r = 0
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for i, v in pairs(userdata1) do
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r = r + v
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end
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return r
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end
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"#,
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)
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.eval::<Function>()?;
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assert_eq!(lua.load("userdata1 - userdata2").eval::<MyUserData>()?.0, 4);
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assert_eq!(lua.load("userdata1:get()").eval::<i64>()?, 7);
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assert_eq!(lua.load("userdata2.inner").eval::<i64>()?, 3);
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assert!(lua.load("userdata2.nonexist_field").eval::<()>().is_err());
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#[cfg(any(
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feature = "lua54",
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feature = "lua53",
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feature = "lua52",
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feature = "luajit52"
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))]
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assert_eq!(pairs_it.call::<_, i64>(())?, 28);
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let userdata2: Value = globals.get("userdata2")?;
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let userdata3: Value = globals.get("userdata3")?;
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assert!(lua.load("userdata2 == userdata3").eval::<bool>()?);
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assert!(userdata2 != userdata3); // because references are differ
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assert!(userdata2.equals(userdata3)?);
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let userdata1: AnyUserData = globals.get("userdata1")?;
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assert!(userdata1.get_metatable()?.contains(MetaMethod::Add)?);
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assert!(userdata1.get_metatable()?.contains(MetaMethod::Sub)?);
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assert!(userdata1.get_metatable()?.contains(MetaMethod::Index)?);
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assert!(!userdata1.get_metatable()?.contains(MetaMethod::Pow)?);
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Ok(())
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}
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#[test]
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#[cfg(feature = "lua54")]
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fn test_metamethod_close() -> Result<()> {
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#[derive(Clone)]
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struct MyUserData(Arc<AtomicI64>);
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impl UserData for MyUserData {
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fn add_methods<'lua, M: UserDataMethods<'lua, Self>>(methods: &mut M) {
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methods.add_method("get", |_, data, ()| Ok(data.0.load(Ordering::Relaxed)));
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methods.add_meta_method(MetaMethod::Close, |_, data, _err: Value| {
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data.0.store(0, Ordering::Relaxed);
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Ok(())
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});
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}
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}
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let lua = Lua::new();
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let globals = lua.globals();
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let ud = MyUserData(Arc::new(AtomicI64::new(-1)));
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let ud2 = ud.clone();
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globals.set(
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"new_userdata",
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lua.create_function(move |_lua, val: i64| {
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let ud = ud2.clone();
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ud.0.store(val, Ordering::Relaxed);
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Ok(ud)
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})?,
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)?;
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lua.load(
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r#"
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do
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local ud <close> = new_userdata(7)
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assert(ud:get() == 7)
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end
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"#,
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)
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.exec()?;
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assert_eq!(ud.0.load(Ordering::Relaxed), 0);
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Ok(())
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}
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#[test]
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fn test_gc_userdata() -> Result<()> {
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struct MyUserdata {
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id: u8,
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}
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impl UserData for MyUserdata {
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fn add_methods<'lua, M: UserDataMethods<'lua, Self>>(methods: &mut M) {
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methods.add_method("access", |_, this, ()| {
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assert!(this.id == 123);
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Ok(())
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});
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}
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}
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let lua = Lua::new();
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lua.globals().set("userdata", MyUserdata { id: 123 })?;
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assert!(lua
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.load(
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r#"
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local tbl = setmetatable({
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userdata = userdata
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}, { __gc = function(self)
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-- resurrect userdata
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hatch = self.userdata
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end })
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tbl = nil
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userdata = nil -- make table and userdata collectable
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collectgarbage("collect")
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hatch:access()
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"#
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)
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.exec()
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.is_err());
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Ok(())
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}
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#[test]
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fn test_userdata_take() -> Result<()> {
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#[derive(Debug)]
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struct MyUserdata(Arc<i64>);
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impl UserData for MyUserdata {
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fn add_methods<'lua, M: UserDataMethods<'lua, Self>>(methods: &mut M) {
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methods.add_method("num", |_, this, ()| Ok(*this.0))
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}
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}
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#[cfg(feature = "serialize")]
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impl serde::Serialize for MyUserdata {
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fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
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where
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S: serde::Serializer,
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{
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serializer.serialize_i64(*self.0)
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}
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}
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fn check_userdata_take(lua: &Lua, userdata: AnyUserData, rc: Arc<i64>) -> Result<()> {
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lua.globals().set("userdata", userdata.clone())?;
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assert_eq!(Arc::strong_count(&rc), 3);
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let userdata_copy = userdata.clone();
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{
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let _value = userdata.borrow::<MyUserdata>()?;
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// We should not be able to take userdata if it's borrowed
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match userdata_copy.take::<MyUserdata>() {
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Err(Error::UserDataBorrowMutError) => {}
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r => panic!("expected `UserDataBorrowMutError` error, got {:?}", r),
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}
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}
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let value = userdata_copy.take::<MyUserdata>()?;
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assert_eq!(*value.0, 18);
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drop(value);
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lua.gc_collect()?;
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assert_eq!(Arc::strong_count(&rc), 1);
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match userdata.borrow::<MyUserdata>() {
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Err(Error::UserDataDestructed) => {}
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r => panic!("expected `UserDataDestructed` error, got {:?}", r),
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}
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match lua.load("userdata:num()").exec() {
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Err(Error::CallbackError { ref cause, .. }) => match cause.as_ref() {
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Error::CallbackDestructed => {}
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err => panic!("expected `CallbackDestructed`, got {:?}", err),
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},
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r => panic!("improper return for destructed userdata: {:?}", r),
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}
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Ok(())
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}
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let lua = Lua::new();
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let rc = Arc::new(18);
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let userdata = lua.create_userdata(MyUserdata(rc.clone()))?;
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userdata.set_nth_user_value(2, MyUserdata(rc.clone()))?;
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check_userdata_take(&lua, userdata, rc)?;
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// Additionally check serializable userdata
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#[cfg(feature = "serialize")]
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{
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let rc = Arc::new(18);
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let userdata = lua.create_ser_userdata(MyUserdata(rc.clone()))?;
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userdata.set_nth_user_value(2, MyUserdata(rc.clone()))?;
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check_userdata_take(&lua, userdata, rc)?;
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}
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Ok(())
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}
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#[test]
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fn test_userdata_destroy() -> Result<()> {
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struct MyUserdata(Arc<()>);
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impl UserData for MyUserdata {}
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let rc = Arc::new(());
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let lua = Lua::new();
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let ud = lua.create_userdata(MyUserdata(rc.clone()))?;
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ud.set_user_value(MyUserdata(rc.clone()))?;
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lua.globals().set("userdata", ud)?;
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assert_eq!(Arc::strong_count(&rc), 3);
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// Should destroy all objects
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lua.globals().raw_remove("userdata")?;
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lua.gc_collect()?;
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lua.gc_collect()?;
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assert_eq!(Arc::strong_count(&rc), 1);
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Ok(())
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}
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#[test]
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fn test_user_values() -> Result<()> {
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struct MyUserData;
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impl UserData for MyUserData {}
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let lua = Lua::new();
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let ud = lua.create_userdata(MyUserData)?;
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ud.set_nth_user_value(1, "hello")?;
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ud.set_nth_user_value(2, "world")?;
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ud.set_nth_user_value(65535, 321)?;
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assert_eq!(ud.get_nth_user_value::<String>(1)?, "hello");
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assert_eq!(ud.get_nth_user_value::<String>(2)?, "world");
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assert_eq!(ud.get_nth_user_value::<Value>(3)?, Value::Nil);
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assert_eq!(ud.get_nth_user_value::<i32>(65535)?, 321);
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assert!(ud.get_nth_user_value::<Value>(0).is_err());
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assert!(ud.get_nth_user_value::<Value>(65536).is_err());
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// Named user values
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ud.set_named_user_value("name", "alex")?;
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ud.set_named_user_value("age", 10)?;
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assert_eq!(ud.get_named_user_value::<_, String>("name")?, "alex");
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assert_eq!(ud.get_named_user_value::<_, i32>("age")?, 10);
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assert_eq!(ud.get_named_user_value::<_, Value>("nonexist")?, Value::Nil);
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Ok(())
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}
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#[test]
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fn test_functions() -> Result<()> {
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struct MyUserData(i64);
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impl UserData for MyUserData {
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fn add_methods<'lua, M: UserDataMethods<'lua, Self>>(methods: &mut M) {
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methods.add_function("get_value", |_, ud: AnyUserData| {
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Ok(ud.borrow::<MyUserData>()?.0)
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});
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methods.add_function_mut("set_value", |_, (ud, value): (AnyUserData, i64)| {
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ud.borrow_mut::<MyUserData>()?.0 = value;
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Ok(())
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});
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methods.add_function("get_constant", |_, ()| Ok(7));
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}
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}
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let lua = Lua::new();
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let globals = lua.globals();
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let userdata = lua.create_userdata(MyUserData(42))?;
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globals.set("userdata", userdata.clone())?;
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lua.load(
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r#"
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function get_it()
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return userdata:get_value()
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end
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function set_it(i)
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return userdata:set_value(i)
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end
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function get_constant()
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return userdata.get_constant()
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end
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"#,
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)
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.exec()?;
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let get = globals.get::<_, Function>("get_it")?;
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let set = globals.get::<_, Function>("set_it")?;
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let get_constant = globals.get::<_, Function>("get_constant")?;
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assert_eq!(get.call::<_, i64>(())?, 42);
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userdata.borrow_mut::<MyUserData>()?.0 = 64;
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assert_eq!(get.call::<_, i64>(())?, 64);
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set.call::<_, ()>(100)?;
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assert_eq!(get.call::<_, i64>(())?, 100);
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assert_eq!(get_constant.call::<_, i64>(())?, 7);
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Ok(())
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}
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#[test]
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fn test_fields() -> Result<()> {
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#[derive(Copy, Clone)]
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struct MyUserData(i64);
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impl UserData for MyUserData {
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fn add_fields<'lua, F: UserDataFields<'lua, Self>>(fields: &mut F) {
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fields.add_field_method_get("val", |_, data| Ok(data.0));
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fields.add_field_method_set("val", |_, data, val| {
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data.0 = val;
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Ok(())
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});
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// Use userdata "uservalue" storage
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fields.add_field_function_get("uval", |_, ud| ud.get_user_value::<Option<String>>());
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fields
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.add_field_function_set("uval", |_, ud, s| ud.set_user_value::<Option<String>>(s));
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fields.add_meta_field_with(MetaMethod::Index, |lua| {
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let index = lua.create_table()?;
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index.set("f", 321)?;
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Ok(index)
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});
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fields.add_meta_field_with(MetaMethod::NewIndex, |lua| {
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lua.create_function(|lua, (_, field, val): (AnyUserData, String, Value)| {
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lua.globals().set(field, val)?;
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Ok(())
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})
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})
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}
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}
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let lua = Lua::new();
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let globals = lua.globals();
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globals.set("ud", MyUserData(7))?;
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lua.load(
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r#"
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assert(ud.val == 7)
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ud.val = 10
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assert(ud.val == 10)
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|
|
assert(ud.uval == nil)
|
|
ud.uval = "hello"
|
|
assert(ud.uval == "hello")
|
|
|
|
assert(ud.f == 321)
|
|
|
|
ud.unknown = 789
|
|
assert(unknown == 789)
|
|
"#,
|
|
)
|
|
.exec()?;
|
|
|
|
Ok(())
|
|
}
|
|
|
|
#[test]
|
|
fn test_metatable() -> Result<()> {
|
|
#[derive(Copy, Clone)]
|
|
struct MyUserData(i64);
|
|
|
|
impl UserData for MyUserData {
|
|
fn add_fields<'lua, F: UserDataFields<'lua, Self>>(fields: &mut F) {
|
|
fields.add_meta_field_with("__type_name", |_| Ok("MyUserData"));
|
|
}
|
|
|
|
fn add_methods<'lua, M: UserDataMethods<'lua, Self>>(methods: &mut M) {
|
|
methods.add_function("my_type_name", |_, data: AnyUserData| {
|
|
let metatable = data.get_metatable()?;
|
|
metatable.get::<_, String>("__type_name")
|
|
});
|
|
}
|
|
}
|
|
|
|
let lua = Lua::new();
|
|
let globals = lua.globals();
|
|
globals.set("ud", MyUserData(7))?;
|
|
lua.load(
|
|
r#"
|
|
assert(ud:my_type_name() == "MyUserData")
|
|
"#,
|
|
)
|
|
.exec()?;
|
|
|
|
let ud: AnyUserData = globals.get("ud")?;
|
|
let metatable = ud.get_metatable()?;
|
|
|
|
match metatable.get::<_, Value>("__gc") {
|
|
Ok(_) => panic!("expected MetaMethodRestricted, got no error"),
|
|
Err(Error::MetaMethodRestricted(_)) => {}
|
|
Err(e) => panic!("expected MetaMethodRestricted, got {:?}", e),
|
|
}
|
|
|
|
match metatable.set(MetaMethod::Index, Nil) {
|
|
Ok(_) => panic!("expected MetaMethodRestricted, got no error"),
|
|
Err(Error::MetaMethodRestricted(_)) => {}
|
|
Err(e) => panic!("expected MetaMethodRestricted, got {:?}", e),
|
|
}
|
|
|
|
let mut methods = metatable
|
|
.pairs()
|
|
.into_iter()
|
|
.map(|kv: Result<(_, Value)>| Ok(kv?.0))
|
|
.collect::<Result<Vec<_>>>()?;
|
|
methods.sort_by_cached_key(|k| k.name().to_owned());
|
|
assert_eq!(methods, vec![MetaMethod::Index, "__type_name".into()]);
|
|
|
|
#[derive(Copy, Clone)]
|
|
struct MyUserData2(i64);
|
|
|
|
impl UserData for MyUserData2 {
|
|
fn add_fields<'lua, F: UserDataFields<'lua, Self>>(fields: &mut F) {
|
|
fields.add_meta_field_with("__index", |_| Ok(1));
|
|
}
|
|
}
|
|
|
|
match lua.create_userdata(MyUserData2(1)) {
|
|
Ok(_) => panic!("expected MetaMethodTypeError, got no error"),
|
|
Err(Error::MetaMethodTypeError { .. }) => {}
|
|
Err(e) => panic!("expected MetaMethodTypeError, got {:?}", e),
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
|
|
#[test]
|
|
fn test_userdata_wrapped() -> Result<()> {
|
|
struct MyUserData(i64);
|
|
|
|
impl UserData for MyUserData {
|
|
fn add_fields<'lua, F: UserDataFields<'lua, Self>>(fields: &mut F) {
|
|
fields.add_field_method_get("data", |_, this| Ok(this.0));
|
|
fields.add_field_method_set("data", |_, this, val| {
|
|
this.0 = val;
|
|
Ok(())
|
|
})
|
|
}
|
|
}
|
|
|
|
let lua = Lua::new();
|
|
let globals = lua.globals();
|
|
|
|
#[cfg(not(feature = "send"))]
|
|
{
|
|
let ud1 = Rc::new(RefCell::new(MyUserData(1)));
|
|
globals.set("rc_refcell_ud", ud1.clone())?;
|
|
lua.load(
|
|
r#"
|
|
rc_refcell_ud.data = rc_refcell_ud.data + 1
|
|
assert(rc_refcell_ud.data == 2)
|
|
"#,
|
|
)
|
|
.exec()?;
|
|
assert_eq!(ud1.borrow().0, 2);
|
|
globals.set("rc_refcell_ud", Nil)?;
|
|
lua.gc_collect()?;
|
|
assert_eq!(Rc::strong_count(&ud1), 1);
|
|
}
|
|
|
|
let ud2 = Arc::new(Mutex::new(MyUserData(2)));
|
|
globals.set("arc_mutex_ud", ud2.clone())?;
|
|
lua.load(
|
|
r#"
|
|
arc_mutex_ud.data = arc_mutex_ud.data + 1
|
|
assert(arc_mutex_ud.data == 3)
|
|
"#,
|
|
)
|
|
.exec()?;
|
|
#[cfg(not(feature = "parking_lot"))]
|
|
assert_eq!(ud2.lock().unwrap().0, 3);
|
|
#[cfg(feature = "parking_lot")]
|
|
assert_eq!(ud2.lock().0, 3);
|
|
|
|
let ud3 = Arc::new(RwLock::new(MyUserData(3)));
|
|
globals.set("arc_rwlock_ud", ud3.clone())?;
|
|
lua.load(
|
|
r#"
|
|
arc_rwlock_ud.data = arc_rwlock_ud.data + 1
|
|
assert(arc_rwlock_ud.data == 4)
|
|
"#,
|
|
)
|
|
.exec()?;
|
|
#[cfg(not(feature = "parking_lot"))]
|
|
assert_eq!(ud3.read().unwrap().0, 4);
|
|
#[cfg(feature = "parking_lot")]
|
|
assert_eq!(ud3.read().0, 4);
|
|
|
|
// Test drop
|
|
globals.set("arc_mutex_ud", Nil)?;
|
|
globals.set("arc_rwlock_ud", Nil)?;
|
|
lua.gc_collect()?;
|
|
assert_eq!(Arc::strong_count(&ud2), 1);
|
|
assert_eq!(Arc::strong_count(&ud3), 1);
|
|
|
|
Ok(())
|
|
}
|
|
|
|
#[test]
|
|
fn test_userdata_proxy() -> Result<()> {
|
|
struct MyUserData(i64);
|
|
|
|
impl UserData for MyUserData {
|
|
fn add_fields<'lua, F: UserDataFields<'lua, Self>>(fields: &mut F) {
|
|
fields.add_field_function_get("static_field", |_, _| Ok(123));
|
|
fields.add_field_method_get("n", |_, this| Ok(this.0));
|
|
}
|
|
|
|
fn add_methods<'lua, M: UserDataMethods<'lua, Self>>(methods: &mut M) {
|
|
methods.add_function("new", |_, n| Ok(Self(n)));
|
|
|
|
methods.add_method("plus", |_, this, n: i64| Ok(this.0 + n));
|
|
}
|
|
}
|
|
|
|
let lua = Lua::new();
|
|
let globals = lua.globals();
|
|
globals.set("MyUserData", lua.create_proxy::<MyUserData>()?)?;
|
|
|
|
lua.load(
|
|
r#"
|
|
assert(MyUserData.static_field == 123)
|
|
local data = MyUserData.new(321)
|
|
assert(data.static_field == 123)
|
|
assert(data.n == 321)
|
|
assert(data:plus(1) == 322)
|
|
|
|
-- Error when accessing the proxy object fields and methods that require instance
|
|
|
|
local ok = pcall(function() return MyUserData.n end)
|
|
assert(not ok)
|
|
|
|
ok = pcall(function() return MyUserData:plus(1) end)
|
|
assert(not ok)
|
|
"#,
|
|
)
|
|
.exec()
|
|
}
|