multiple unsafe but it compiles

Cargo.lock

@@ -183,6 +183,48 @@ version = "1.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "57c0d7b74b563b49d38dae00a0c37d4d6de9b432382b2892f0574ddcae73fd0a"
 
+[[package]]
+name = "phf"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ade2d8b8f33c7333b51bcf0428d37e217e9f32192ae4772156f65063b8ce03dc"
+dependencies = [
+ "phf_macros",
+ "phf_shared",
+]
+
+[[package]]
+name = "phf_generator"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "48e4cc64c2ad9ebe670cb8fd69dd50ae301650392e81c05f9bfcb2d5bdbc24b0"
+dependencies = [
+ "phf_shared",
+ "rand",
+]
+
+[[package]]
+name = "phf_macros"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3444646e286606587e49f3bcf1679b8cef1dc2c5ecc29ddacaffc305180d464b"
+dependencies = [
+ "phf_generator",
+ "phf_shared",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "phf_shared"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "90fcb95eef784c2ac79119d1dd819e162b5da872ce6f3c3abe1e8ca1c082f72b"
+dependencies = [
+ "siphasher",
+]
+
 [[package]]
 name = "pkg-config"
 version = "0.3.30"
@@ -322,6 +364,7 @@ version = "0.4.1"
 dependencies = [
  "glam",
  "mlua",
+ "phf",
  "rbx_dom_weak",
  "rbx_reflection",
  "rbx_reflection_database",
@@ -360,6 +403,12 @@ version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
 
+[[package]]
+name = "siphasher"
+version = "0.3.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38b58827f4464d87d377d175e90bf58eb00fd8716ff0a62f80356b5e61555d0d"
+
 [[package]]
 name = "syn"
 version = "2.0.77"

Cargo.toml

@@ -10,6 +10,7 @@ authors = ["Rhys Lloyd <krakow20@gmail.com>"]
 [dependencies]
 glam = "0.29.0"
 mlua = { version = "0.9.9", features = ["luau"] }
+phf = { version = "0.11.2", features = ["macros"] }
 rbx_dom_weak = { version = "2.7.0", registry = "strafesnet" }
 rbx_reflection = { version = "4.7.0", registry = "strafesnet" }
 rbx_reflection_database = { version = "0.2.10", registry = "strafesnet" }

src/context.rs

@@ -19,7 +19,7 @@ impl Context{
 	pub const fn new(dom:WeakDom)->Self{
 		Self{dom}
 	}
-	pub fn script_singleton(source:String)->(Context,crate::runner::instance::Script,Services){
+	pub fn script_singleton(source:String)->(Context,crate::runner::instance::Instance,Services){
 		let script=InstanceBuilder::new("Script")
 			.with_property("Source",rbx_types::Variant::String(source));
 		let script_ref=script.referent();
@@ -28,7 +28,7 @@ impl Context{
 			.with_child(script)
 		));
 		let services=context.convert_into_place();
-		(context,crate::runner::instance::Script::new(script_ref),services)
+		(context,crate::runner::instance::Instance::new(script_ref),services)
 	}
 	pub fn from_ref(dom:&WeakDom)->&Context{
 		unsafe{&*(dom as *const WeakDom as *const Context)}
@@ -42,8 +42,8 @@ impl Context{
 			class_is_a(instance.class.as_ref(),superclass)
 		).map(|instance|instance.referent())
 	}
-	pub fn scripts(&self)->Vec<crate::runner::instance::Script>{
-		self.superclass_iter("LuaSourceContainer").map(crate::runner::instance::Script::new).collect()
+	pub fn scripts(&self)->Vec<crate::runner::instance::Instance>{
+		self.superclass_iter("LuaSourceContainer").map(crate::runner::instance::Instance::new).collect()
 	}
 
 	pub fn find_services(&self)->Option<Services>{

src/runner/instance.rs

@@ -1,10 +1,36 @@
-use mlua::IntoLua;
+use std::collections::{hash_map::Entry,HashMap};
+
+use mlua::{IntoLua,IntoLuaMulti};
 use rbx_types::Ref;
 use rbx_dom_weak::{InstanceBuilder,WeakDom};
 
 use super::vector3::Vector3;
 
+/// A store of created functions for each Roblox class.
+/// Functions are created the first time they are accessed and stored in this data structure.
+#[derive(Default)]
+struct ClassFunctions<'a>{
+	classes:HashMap<&'static str,//ClassName
+		HashMap<&'static str,//Function name
+			mlua::Function<'a>
+		>
+	>
+}
+
+fn place_id<'lua>(lua:&'lua mlua::Lua,tuple:mlua::MultiValue<'lua>)->mlua::Result<mlua::MultiValue<'lua>>{
+	0.into_lua_multi(lua)
+}
+type FPointer=for<'lua> fn(&'lua mlua::Lua,mlua::MultiValue<'lua>)->mlua::Result<mlua::MultiValue<'lua>>;
+static CLASS_FUNCTION_DATABASE:phf::Map<&str,phf::Map<&str,FPointer>>=phf::phf_map!{
+	"DataModel"=>phf::phf_map!{
+		"GetService"=>place_id as FPointer,
+	}
+};
+
 pub fn set_globals(lua:&mlua::Lua,globals:&mlua::Table<'_>)->Result<(),mlua::Error>{
+	//class functions store
+	lua.set_app_data::<ClassFunctions<'static>>(ClassFunctions::default());
+
 	let instance_table=lua.create_table()?;
 
 	//Instance.new
@@ -29,6 +55,10 @@ fn dom_mut<T>(lua:&mlua::Lua,mut f:impl FnMut(&mut WeakDom)->mlua::Result<T>)->m
 	let mut dom=lua.app_data_mut::<&'static mut WeakDom>().ok_or(mlua::Error::runtime("DataModel missing"))?;
 	f(&mut *dom)
 }
+fn class_functions_mut<T>(lua:&mlua::Lua,mut f:impl FnMut(&mut ClassFunctions<'_>)->mlua::Result<T>)->mlua::Result<T>{
+	let mut dom=lua.app_data_mut::<ClassFunctions<'static>>().ok_or(mlua::Error::runtime("ClassFunctions missing"))?;
+	f(&mut *dom)
+}
 
 fn coerce_float32(value:&mlua::Value)->Option<f32>{
 	match value{
@@ -48,6 +78,17 @@ fn get_full_name(dom:&rbx_dom_weak::WeakDom,instance:&rbx_dom_weak::Instance)->S
 	}
 	full_name
 }
+//helper function for script
+pub fn get_name_source(lua:&mlua::Lua,script:Instance)->Result<(String,String),mlua::Error>{
+	dom_mut(lua,|dom|{
+		let instance=script.get(dom)?;
+		let source=match instance.properties.get("Source"){
+			Some(rbx_dom_weak::types::Variant::String(s))=>s.clone(),
+			_=>Err(mlua::Error::external("Missing script.Source"))?,
+		};
+		Ok((get_full_name(dom,instance),source))
+	})
+}
 
 pub fn find_first_child<'a>(dom:&'a rbx_dom_weak::WeakDom,instance:&rbx_dom_weak::Instance,name:&str)->Option<&'a rbx_dom_weak::Instance>{
 	instance.children().iter().filter_map(|&r|dom.get_by_ref(r)).find(|inst|inst.name==name)
@@ -63,63 +104,22 @@ pub fn find_first_descendant_of_class<'a>(dom:&'a rbx_dom_weak::WeakDom,instance
 	dom.descendants_of(instance.referent()).find(|&inst|inst.class==class)
 }
 
-//workaround until I have an enum of classes
-struct Dereferent(Ref);
-impl mlua::UserData for Dereferent{}
-type_from_lua_userdata!(Dereferent);
-impl Referent for Dereferent{
-	fn referent(&self)->Ref{
-		self.0
+#[derive(Clone,Copy)]
+pub struct Instance{
+	referent:Ref,
+}
+impl Instance{
+	pub const fn new(referent:Ref)->Self{
+		Self{referent}
+	}
+	pub fn get<'a>(&self,dom:&'a WeakDom)->mlua::Result<&'a rbx_dom_weak::Instance>{
+		dom.get_by_ref(self.referent).ok_or(mlua::Error::runtime("Instance missing"))
+	}
+	pub fn get_mut<'a>(&self,dom:&'a mut WeakDom)->mlua::Result<&'a mut rbx_dom_weak::Instance>{
+		dom.get_by_ref_mut(self.referent).ok_or(mlua::Error::runtime("Instance missing"))
 	}
 }
-
-trait Referent{
-	fn referent(&self)->Ref;
-	fn get<'a>(&self,dom:&'a WeakDom)->mlua::Result<&'a rbx_dom_weak::Instance>{
-		dom.get_by_ref(self.referent()).ok_or(mlua::Error::runtime("Instance missing"))
-	}
-	fn get_mut<'a>(&self,dom:&'a mut WeakDom)->mlua::Result<&'a mut rbx_dom_weak::Instance>{
-		dom.get_by_ref_mut(self.referent()).ok_or(mlua::Error::runtime("Instance missing"))
-	}
-}
-
-macro_rules! class{
-	($class:ident)=>{
-		pub struct $class{
-			referent:Ref,
-		}
-		impl $class{
-			pub const fn new(referent:Ref)->Self{
-				Self{referent}
-			}
-		}
-		impl Referent for $class{
-			fn referent(&self)->Ref{
-				self.referent
-			}
-		}
-		type_from_lua_userdata!($class);
-	};
-}
-macro_rules! class_composition{
-	($class:ident,($($superclass:ident),*))=>{
-		impl mlua::UserData for $class{
-			fn add_fields<'lua,F:mlua::UserDataFields<'lua,Self>>(fields:&mut F){
-				fields.add_field_method_get("Referent",|_,this|{
-					Ok(Dereferent(this.referent()))
-				});
-				$(
-					$superclass::composition_add_fields(fields);
-				)*
-			}
-			fn add_methods<'lua,M:mlua::UserDataMethods<'lua,Self>>(methods:&mut M){
-				$(
-					$superclass::composition_add_methods(methods);
-				)*
-			}
-		}
-	};
-}
+type_from_lua_userdata!(Instance);
 
 //TODO: update rbx_reflection and use dom.superclasses_iter
 pub struct SuperClassIter<'a> {
@@ -140,21 +140,18 @@ impl<'a> Iterator for SuperClassIter<'a> {
     }
 }
 
-class!(Instance);
-class_composition!(Instance,(Instance));
-
-impl Instance{
-	fn composition_add_fields<'lua,T:Referent,F:mlua::UserDataFields<'lua,T>>(fields:&mut F){
+impl mlua::UserData for Instance{
+	fn add_fields<'lua,F:mlua::UserDataFields<'lua,Self>>(fields:&mut F){
 		fields.add_field_method_get("Parent",|lua,this|{
 			dom_mut(lua,|dom|{
 				let instance=this.get(dom)?;
 				Ok(Instance::new(instance.parent()))
 			})
 		});
-		fields.add_field_method_set("Parent",|lua,this,val:mlua::AnyUserData|{
-			let Dereferent(referent)=mlua::AnyUserDataExt::get(&val,"Referent")?;
+		fields.add_field_method_set("Parent",|lua,this,val:Option<Instance>|{
+			let parent=val.ok_or(mlua::Error::runtime("Nil Parent not yet supported"))?;
 			dom_mut(lua,|dom|{
-				dom.transfer_within(this.referent(),referent);
+				dom.transfer_within(this.referent,parent.referent);
 				Ok(())
 			})
 		});
@@ -179,7 +176,7 @@ impl Instance{
 			})
 		});
 	}
-	fn composition_add_methods<'lua,T:Referent,M:mlua::UserDataMethods<'lua,T>>(methods:&mut M){
+	fn add_methods<'lua,M:mlua::UserDataMethods<'lua,Self>>(methods:&mut M){
 		methods.add_method("GetChildren",|lua,this,_:()|
 			dom_mut(lua,|dom|{
 				let instance=this.get(dom)?;
@@ -192,7 +189,7 @@ impl Instance{
 				Ok(children)
 			})
 		);
-		let ffc=|lua,this:&T,(name,search_descendants):(mlua::String,Option<bool>)|{
+		let ffc=|lua,this:&Self,(name,search_descendants):(mlua::String,Option<bool>)|{
 			let name_str=name.to_str()?;
 			dom_mut(lua,|dom|{
 				let instance=this.get(dom)?;
@@ -226,7 +223,7 @@ impl Instance{
 		methods.add_method("GetDescendants",|lua,this,_:()|
 			dom_mut(lua,|dom|{
 				let children:Vec<_>=dom
-					.descendants_of(this.referent())
+					.descendants_of(this.referent)
 					.map(|instance|
 						Instance::new(instance.referent())
 					)
@@ -242,21 +239,70 @@ impl Instance{
 		);
 		methods.add_method("Destroy",|lua,this,()|
 			dom_mut(lua,|dom|{
-				dom.destroy(this.referent());
+				dom.destroy(this.referent);
 				Ok(())
 			})
 		);
-		methods.add_meta_function(mlua::MetaMethod::Index,|lua,(this,index):(mlua::AnyUserData,mlua::String)|{
+		methods.add_meta_function(mlua::MetaMethod::Index,|lua,(this,index):(Instance,mlua::String)|{
 			let index_str=index.to_str()?;
-			let dereferent:Dereferent=mlua::AnyUserDataExt::get(&this,"Referent")?;
 			dom_mut(lua,|dom|{
-				let instance=dereferent.get(dom)?;
-				match instance.properties.get(index_str){
+				let instance=this.get(dom)?;
+				//Find existing property
+				match instance.properties.get(index_str)
+					//Find default value
+					.or_else(||{
+						let db=rbx_reflection_database::get();
+						db.classes.get(instance.class.as_str()).and_then(|cd|
+							db.find_default_property(cd,index_str)
+						)
+					})
+				{
 					Some(&rbx_types::Variant::CFrame(cf))=>return Ok(Into::<super::cframe::CFrame>::into(cf).into_lua(lua)),
 					Some(&rbx_types::Variant::Vector3(v))=>return Ok(Into::<super::vector3::Vector3>::into(v).into_lua(lua)),
-					//None=>get_default_value
 					_=>(),
 				}
+				//find a function with a matching name
+				if let Some(ret)=class_functions_mut(lua,|cf|{
+					let class_str=instance.class.as_str();
+					let f=match CLASS_FUNCTION_DATABASE.get_entry(class_str){
+						Some((&static_class_str,class_functions))=>{
+							match cf.classes.entry(static_class_str){
+								Entry::Occupied(mut occupied_entry)=>{
+									match class_functions.get_entry(index_str){
+										Some((&static_index_str,function_pointer))=>{
+											match occupied_entry.get_mut().entry(static_index_str){
+												Entry::Occupied(occupied_entry)=>{
+													Some(occupied_entry.get().clone())
+												},
+												Entry::Vacant(vacant_entry)=>{
+													Some(vacant_entry.insert(unsafe{core::mem::transmute(lua.create_function(function_pointer)?)}).clone())
+												},
+											}
+										},
+										None=>None,
+									}
+								},
+								Entry::Vacant(vacant_entry)=>{
+									match class_functions.get_entry(index_str){
+										Some((&static_index_str,function_pointer))=>{
+											let mut h=HashMap::new();
+											h.entry(static_index_str).or_insert(unsafe{core::mem::transmute(lua.create_function(function_pointer)?)});
+											vacant_entry.insert(h).get(static_index_str).map(|f|f.clone())
+										},
+										None=>None,
+									}
+								},
+							}
+						},
+						None=>None,
+					};
+					Ok(f.map(|f|{
+						let f_static:mlua::Function::<'static>=unsafe{core::mem::transmute(f)};
+						f_static
+					}))
+				})?{
+					return Ok(ret.into_lua(lua));
+				}
 				//find a child with a matching name
 				Ok(
 					find_first_child(dom,instance,index_str)
@@ -265,10 +311,9 @@ impl Instance{
 				)
 			})
 		});
-		methods.add_meta_function(mlua::MetaMethod::NewIndex,|lua,(this,index,value):(mlua::AnyUserData,mlua::String,mlua::Value)|{
-			let dereferent:Dereferent=mlua::AnyUserDataExt::get(&this,"Referent")?;
+		methods.add_meta_function(mlua::MetaMethod::NewIndex,|lua,(this,index,value):(Instance,mlua::String,mlua::Value)|{
 			dom_mut(lua,|dom|{
-				let instance=dereferent.get_mut(dom)?;
+				let instance=this.get_mut(dom)?;
 				//println!("__newindex t={} i={index:?} v={value:?}",instance.name);
 				let index_str=index.to_str()?;
 				let db=rbx_reflection_database::get();
@@ -322,82 +367,3 @@ impl Instance{
 		});
 	}
 }
-
-class!(DataModel);
-class_composition!(DataModel,(Instance,DataModel));
-impl DataModel{
-	fn composition_add_fields<'lua,T:Referent,F:mlua::UserDataFields<'lua,T>>(fields:&mut F){
-		fields.add_field_method_get("workspace",|lua,this|{
-			dom_mut(lua,|dom|{
-				Ok(find_first_child_of_class(dom,this.get(dom)?,"Workspace")
-					.map(|inst|Workspace::new(inst.referent()))
-				)
-			})
-		});
-		fields.add_field_method_get("PlaceId",|lua,this|{
-			Ok(mlua::Value::Integer(0))
-		});
-	}
-	fn composition_add_methods<'lua,T,M:mlua::UserDataMethods<'lua,T>>(methods:&mut M){
-		methods.add_method("GetService",|lua,this,service:String|
-			dom_mut(lua,|dom|{
-				match service.as_str(){
-					"Lighting"=>{
-						let referent=find_first_child_of_class(dom,dom.root(),"Lighting")
-        				.map(|instance|instance.referent())
-						.unwrap_or_else(||
-							dom.insert(dom.root_ref(),InstanceBuilder::new("Lighting"))
-						);
-						Lighting::new(referent).into_lua(lua)
-					},
-					other=>Err::<mlua::Value,_>(mlua::Error::runtime(format!("Service '{other}' not supported"))),
-				}
-			})
-		);
-	}
-}
-
-class!(Workspace);
-class_composition!(Workspace,(Instance,Workspace));
-impl Workspace{
-	fn composition_add_fields<'lua,T:Referent,F:mlua::UserDataFields<'lua,T>>(fields:&mut F){
-		fields.add_field_method_get("Terrain",|lua,this|{
-			dom_mut(lua,|dom|{
-				Ok(find_first_child_of_class(dom,this.get(dom)?,"Terrain")
-					.map(|inst|Terrain::new(inst.referent()))
-				)
-			})
-		});
-	}
-	fn composition_add_methods<'lua,T,M:mlua::UserDataMethods<'lua,T>>(_methods:&mut M){
-	}
-}
-class!(Lighting);
-class_composition!(Lighting,(Instance));
-
-class!(Script);
-class_composition!(Script,(Instance));
-impl Script{
-	pub fn get_name_source(&self,lua:&mlua::Lua)->Result<(String,String),mlua::Error>{
-		dom_mut(lua,|dom|{
-			let instance=self.get(dom)?;
-			let source=match instance.properties.get("Source"){
-				Some(rbx_dom_weak::types::Variant::String(s))=>s.clone(),
-				_=>Err(mlua::Error::external("Missing script.Source"))?,
-			};
-			Ok((get_full_name(dom,instance),source))
-		})
-	}
-}
-
-class!(Terrain);
-class_composition!(Terrain,(Instance,Terrain));
-impl Terrain{
-	fn composition_add_fields<'lua,T:Referent,F:mlua::UserDataFields<'lua,T>>(fields:&mut F){
-	}
-	fn composition_add_methods<'lua,T,M:mlua::UserDataMethods<'lua,T>>(methods:&mut M){
-		methods.add_method("FillBlock",|lua,this,_:(super::cframe::CFrame,Vector3,super::r#enum::Enum)|
-			Ok(())//Ok(mlua::Value::Nil)
-		)
-	}
-}

src/runner/runner.rs

@@ -53,8 +53,8 @@ impl Runner{
 	pub fn runnable_context_with_services<'a>(self,context:&'a mut Context,services:&crate::context::Services)->Result<Runnable<'a>,Error>{
 		{
 			let globals=self.lua.globals();
-			globals.set("game",super::instance::DataModel::new(services.game)).map_err(Error::RustLua)?;
-			globals.set("workspace",super::instance::Workspace::new(services.workspace)).map_err(Error::RustLua)?;
+			globals.set("game",super::instance::Instance::new(services.game)).map_err(Error::RustLua)?;
+			globals.set("workspace",super::instance::Instance::new(services.workspace)).map_err(Error::RustLua)?;
 		}
 		//this makes set_app_data shut up about the lifetime
 		self.lua.set_app_data::<&'static mut rbx_dom_weak::WeakDom>(unsafe{core::mem::transmute(&mut context.dom)});
@@ -77,8 +77,8 @@ impl Runnable<'_>{
 			lua:self.lua,
 		}
 	}
-	pub fn run_script(&self,script:super::instance::Script)->Result<(),Error>{
-		let (name,source)=script.get_name_source(&self.lua).map_err(Error::RustLua)?;
+	pub fn run_script(&self,script:super::instance::Instance)->Result<(),Error>{
+		let (name,source)=super::instance::get_name_source(&self.lua,script).map_err(Error::RustLua)?;
 		self.lua.globals().set("script",script).map_err(Error::RustLua)?;
 		self.lua.load(source.as_str())
 		.set_name(name)