feat: better errors

Author: CREAsTIVE

stack-control/Cargo.toml

@@ -9,3 +9,4 @@ unicode-segmentation = "1.10.1"
 indoc = "2"
 strum = "0.27"
 strum_macros = "0.27"
+thiserror = "2.0.12"

stack-control/src/bytecode/commands.rs

@@ -1,4 +1,6 @@
-use std::sync::Arc;
+use std::{error, sync::Arc};
+
+use thiserror::Error;
 
 use crate::runtime::stack::Stack;
 
@@ -8,13 +10,18 @@ pub mod math;
 pub mod iters;
 pub mod conditionals;
 
-#[derive(strum_macros::IntoStaticStr)]
+#[derive(Error, Debug)]
 pub enum RuntimeException {
+  #[error("No elements ahead of stack")]
   NoElementsAheadOfStack,
+  #[error("No elements on stack")]
   NoElementsOnStack,
+  #[error("Wrong element type")]
   WrongElementType,
+  #[error("Not implemented")]
   NotImplemented
 }
+
 pub trait CommandExecutable {
   fn execute(&self, stack: &mut Stack) -> Result<(), RuntimeException>;
   fn to_string(&self) -> String;

stack-control/src/compiletime/compiler.rs

@@ -1,6 +1,7 @@
 use std::sync::Arc;
 
 use indoc::indoc;
+use thiserror::Error;
 
 use crate::{bytecode::commands::{core::{ListGeneratorCommand, StackPusherCommand}, CommandMeta, DescribedCommand}, runtime::value::Value};
 
@@ -13,27 +14,16 @@ pub struct Scope {
   stack_pusher_meta: Arc<CommandMeta>
 }
 
+#[derive(Error, Debug)]
 pub enum CompilationException {
+  #[error("Unexcpected End Token {0}")]
   UnexcpectedEndToken(String),
+  #[error("Function token required")]
   FunctionTokenRequired,
+  #[error("Command {0} not found")]
   CommandNotFound(String),
 }
 
-// TODO: Try macro?
-
-impl ToString for CompilationException {
-  fn to_string(&self) -> String {
-    match self {
-      CompilationException::CommandNotFound(cmd) => 
-        format!("Command '{cmd}' not found"),
-      CompilationException::FunctionTokenRequired =>
-        format!("Function token required"),
-      CompilationException::UnexcpectedEndToken(t) => 
-        format!("Unexcpected END token: {t}")
-    }
-  }
-}
-
 impl Scope {
   pub fn new() -> Self {
     Scope { 
@@ -90,8 +80,6 @@ impl Scope {
       &'a self, 
       token: CommandToken, 
       tokens: &mut impl Iterator<Item = Token>) -> Result<Arc<DescribedCommand>, CompilationException> {
-    
-
     Ok(match token {
       CommandToken::Number(num) => {
         Arc::new(DescribedCommand {