240 lines
6.4 KiB
Rust
240 lines
6.4 KiB
Rust
use std::sync::Arc;
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use rlua::{
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AnyUserData, ExternalError, Function, MetaMethod, Result, String, UserData, UserDataMethods,
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};
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include!("_lua.rs");
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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 = make_lua();
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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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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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let lua = make_lua();
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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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"#,
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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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#[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_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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}
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}
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let lua = make_lua();
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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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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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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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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 = make_lua();
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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 detroys_userdata() -> 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 = make_lua();
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lua.globals().set("userdata", MyUserdata(rc.clone()))?;
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assert_eq!(Arc::strong_count(&rc), 2);
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// should destroy all objects
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let _ = lua.globals().raw_remove("userdata")?;
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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 user_value() -> Result<()> {
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struct MyUserData;
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impl UserData for MyUserData {}
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let lua = make_lua();
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let ud = lua.create_userdata(MyUserData)?;
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ud.set_user_value("hello")?;
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assert_eq!(ud.get_user_value::<String>()?, "hello");
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assert!(ud.get_user_value::<u32>().is_err());
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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("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 = make_lua();
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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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