♻️ refactor: remove special types BogusArg and BogusEnv

This is a milestone towards actually implementing all of Lua.

src/state.rs

@@ -1,7 +1,4 @@
-use std::{
-	collections::HashMap,
-	rc::Rc,
-};
+use std::rc::Rc;
 
 use crate::{
 	instruction::Instruction,
@@ -71,15 +68,16 @@ impl Default for State {
 impl State {
 	pub fn upvalues_from_args <I: Iterator <Item = String>> (args: I) -> Vec <Value>
 	{
-		let arg: Vec <_> = args.map (|s| s.to_string ()).collect ();
+		let arg = args.map (|s| Value::from (s)).enumerate ();
+		let arg = Value::from_iter (arg.map (|(i, v)| (Value::from (i), v)));
 		
-		let env = HashMap::from_iter ([
-			("arg", Value::BogusArg (arg.into ())),
+		let env = [
+			("arg", arg),
 			("print", Value::BogusPrint),
-		].map (|(k, v)| (k.to_string (), v)));
+		].into_iter ().map (|(k, v)| (k.to_string (), v));
 		
 		vec! [
-			Value::BogusEnv (env.into ()),
+			Value::from_iter (env.into_iter ()),
 		]
 	}
 	
@@ -272,30 +270,21 @@ impl State {
 					let b = usize::try_from (*b).unwrap ();
 					let c = usize::try_from (*c).unwrap ();
 					
-					let env = match upvalues.get (b).unwrap () {
-						Value::BogusEnv (x) => x,
-						_ => panic! ("Only allowed upvalue is BogusEnv"),
-					};
+					let table = upvalues.get (b).unwrap ().as_table ().expect ("GetTabUp only works on tables").borrow ();
 					
 					let key = match k.get (c).unwrap () {
-						Value::String (s) => s.as_ref (),
+						Value::String (s) => String::from (s.as_ref()),
 						_ => panic! ("GetTabUp only supports string keys"),
 					};
 					
-					let value = env.get (key).unwrap ();
-					*self.reg_mut (*a) = value.clone ();
+					*self.reg_mut (*a) = table.get (key);
 				},
 				Instruction::GetI (a, b, c) => {
-					let key = usize::try_from (*c).unwrap ();
+					let key = i64::try_from (*c).unwrap ();
 					
-					let table = self.reg (*b);
-					let value = match table {
-						Value::BogusArg (arg) => arg.get (key).map (|x| x.as_str().into ()).unwrap_or_default(),
-						Value::Table (t) => {
-							let key = Value::from (i64::try_from (key).unwrap ());
-							t.borrow ().get (key)
-						},
-						_ => unimplemented! (),
+					let value = {
+						let table = self.reg (*b).as_table ().expect ("GetI only works on tables").borrow ();
+						table.get (key)
 					};
 					
 					*self.reg_mut (*a) = value;

src/value.rs

@@ -29,11 +29,9 @@ pub enum Value {
 	Table (Rc <RefCell <Table>>),
 	
 	// These are all bogus, I haven't figured out how to implement
-	// tables and function pointers yet
+	// closures yet
 	
-	BogusArg (Rc <Vec <String>>),
 	BogusClosure (Rc <BogusClosure>),
-	BogusEnv (Rc <HashMap <String, Value>>),
 	BogusPrint,
 }
 
@@ -54,9 +52,7 @@ impl fmt::Display for Value {
 			Value::String (s) => write! (f, "{}", s),
 			Value::Table (t) => write! (f, "table: {:?}", std::rc::Rc::as_ptr (t)),
 			
-			Value::BogusArg (_) => write! (f, "BogusArg"),
 			Value::BogusClosure (_) => write! (f, "BogusClosure"),
-			Value::BogusEnv (_) => write! (f, "BogusEnv"),
 			Value::BogusPrint => write! (f, "BogusPrint"),
 		}
 	}
@@ -98,12 +94,37 @@ impl From <f64> for Value {
 	}
 }
 
+impl From <usize> for Value {
+	fn from (x: usize) -> Self {
+		Self::Integer (i64::try_from (x).unwrap ())
+	}
+}
+
 impl From <Table> for Value {
 	fn from (x: Table) -> Self {
 		Self::Table (Rc::new (RefCell::new (x)))
 	}
 }
 
+impl FromIterator <(Value, Value)> for Value {
+	fn from_iter <I: IntoIterator <Item=(Value, Value)>> (i: I) -> Self {
+		let table = Table::from_iter (i);
+		Self::from (table)
+	}
+}
+
+impl FromIterator <(String, Value)> for Value {
+	fn from_iter <I: IntoIterator <Item=(String, Value)>> (i: I) -> Self {
+		Self::from_iter (i.into_iter ().map (|(s, v)| (Value::from (s), v)))
+	}
+}
+
+impl FromIterator <Value> for Value {
+	fn from_iter <I: IntoIterator <Item=Value>> (i: I) -> Self {
+		Self::from_iter ((1..).zip (i.into_iter ()).map (|(i, v)| (Value::from (i), v)))
+	}
+}
+
 impl Eq for Value {}
 
 impl std::hash::Hash for Value {
@@ -122,9 +143,7 @@ impl std::hash::Hash for Value {
 			Self::String (x) => x.hash (state),
 			Self::Table (x) => Rc::as_ptr (&x).hash (state),
 			
-			Self::BogusArg (_) => panic! ("can't hash Bogus values"),
 			Self::BogusClosure (_) => panic! ("can't hash Bogus values"),
-			Self::BogusEnv (_) => panic! ("can't hash Bogus values"),
 			Self::BogusPrint => panic! ("can't hash Bogus values"),
 		}
 	}
@@ -205,6 +224,17 @@ impl Table {
 	}
 }
 
+impl FromIterator <(Value, Value)> for Table {
+	fn from_iter<I: IntoIterator<Item = (Value, Value)>> (i: I) -> Self 
+	{
+		let hash = i.into_iter ().collect ();
+		Self {
+			array: Default::default (),
+			hash,
+		}
+	}
+}
+
 #[cfg (test)]
 mod tests {
 	use std::collections::HashMap;