Fix some warnings, make commands nicer

reid_src/test.reid

@@ -1 +1,2 @@
-let otus = "gotus";
+let otus = "gotus";
+let dotus = otus;

src/compiler.rs

@@ -3,19 +3,20 @@ use std::collections::HashMap;
 use super::errors::CompilerError;
 use super::parser::{Expression, LiteralPattern, ParsedReid, Pattern, Position, Statement};
 
-type Variable = (VariableID, VariableType);
+type Variable = (HeapID, VariableType);
-type VariableID = u32;
+type HeapID = u32;
+type RegID = u32;
 
 #[derive(Debug)]
 pub enum Command {
-    InitializeVariable(VariableID, VariableType),
+    InitializeVariable(HeapID, VariableType), // Initializes new variable to HeapID at VariableType
-    BeginScope,
+    BeginScope,                               // Begins new Scope
-    EndScope,
+    EndScope,                                 // Ends Scope
-    Pop(u32),                        // Pop into registery u32
+    Pop(RegID),                               // Pop into registery at RegID
-    Push(u32),                       // Push out of registery 32
+    Push(RegID),                              // Push out of registery at RegID
-    AssignVariable(VariableID, u32), // Assign variable from registery u32
+    AssignVariable(HeapID, RegID),            // Assign variable from registery at RegID
-    VarToReg(VariableID, u32),       // Bring Variable to registery u32
+    VarToReg(HeapID, RegID),                  // Bring Variable to registery at RegID
-    StringLit(String),               // Bring String Literal to Heap
+    StringLit(String),                        // Bring String Literal to Stack
 }
 
 #[derive(Debug, Copy, Clone)]
@@ -109,7 +110,7 @@ impl Compiler {
                     Err(err) => Err(CompilerError::LetFailed(pos, Box::new(err))),
                 }
             }
-            Statement::ExprStatement(pos, expr) => self.handle_expression(expr),
+            Statement::ExprStatement(_, expr) => self.handle_expression(expr),
         }
     }
 
@@ -123,16 +124,16 @@ impl Compiler {
 
 #[derive(Default)]
 pub struct Scope {
-    counter: VariableID,
+    counter: HeapID,
     variables: HashMap<String, Variable>,
-    innerScope: Option<Box<Scope>>,
+    inner_scope: Option<Box<Scope>>,
 }
 
 impl Scope {
     fn get(&self, variable: String) -> Option<Variable> {
         if let Some(val) = self.variables.get(&variable) {
             Some(*val)
-        } else if let Some(inner) = &self.innerScope {
+        } else if let Some(inner) = &self.inner_scope {
             if let Some(val) = inner.get(variable) {
                 Some((val.0 + self.counter, val.1))
             } else {
@@ -151,7 +152,7 @@ impl Scope {
     ) -> Result<(), CompilerError> {
         if self.variables.contains_key(&variable) {
             Err(CompilerError::VariableExists(pos, variable))
-        } else if let Some(inner) = &mut self.innerScope {
+        } else if let Some(inner) = &mut self.inner_scope {
             inner.add_var(pos, variable, vtype)
         } else {
             self.variables.insert(variable, (self.counter, vtype));
@@ -161,19 +162,19 @@ impl Scope {
     }
 
     fn begin_scope(&mut self) {
-        if let Some(inner) = &mut self.innerScope {
+        if let Some(inner) = &mut self.inner_scope {
             inner.begin_scope();
         } else {
-            self.innerScope = Some(Box::default());
+            self.inner_scope = Some(Box::default());
         }
     }
 
     fn end_scope(&mut self, pos: Position) -> Result<(), CompilerError> {
-        if let Some(inner) = &mut self.innerScope {
+        if let Some(inner) = &mut self.inner_scope {
-            if inner.innerScope.is_some() {
+            if inner.inner_scope.is_some() {
                 inner.end_scope(pos)?;
             } else {
-                self.innerScope = None;
+                self.inner_scope = None;
             }
             Ok(())
         } else {