more lowering

parser/src/ast.rs

@@ -3,7 +3,8 @@ use std::fmt::Debug;
 use bitflags::bitflags;
 use dbg_pls::DebugPls;
 
-use crate::{sym::Symbol, Spanned};
+use crate::sym::Symbol;
+pub use crate::Spanned;
 
 pub type Ident = Spanned<Symbol>;
 
@@ -14,7 +15,7 @@ pub type Ident = Spanned<Symbol>;
 #[derive(Debug, DebugPls)]
 pub enum Atom {
     Ident(Ident),
-    Int(i128),
+    Int(u128),
     Float(f64),
     String(String),
     Char(u8),

parser/src/parser.rs

@@ -512,7 +512,6 @@ where
 
             // TODO: recover here
             let stmt = self.statement()?;
-
             stmts.push(stmt);
         };
         Ok((stmts, brace_span.extend(end_span)))

parser/src/sym.rs

@@ -1,4 +1,8 @@
-use std::{cell::RefCell, fmt::Debug, marker::PhantomData};
+use std::{
+    cell::RefCell,
+    fmt::{Debug, Display},
+    marker::PhantomData,
+};
 
 use dbg_pls::DebugPls;
 use lasso::Spur;
@@ -37,3 +41,9 @@ impl DebugPls for Symbol {
         self.as_str(|s| f.debug_ident(s))
     }
 }
+
+impl Display for Symbol {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        INTERNER.with(|i| f.write_str(i.borrow_mut().resolve(&self.spur)))
+    }
+}

parser/src/token.rs

@@ -71,7 +71,7 @@ pub enum Keyword {
 
 #[derive(Debug, Clone, Copy)]
 pub enum Constant {
-    Int(i128),
+    Int(u128),
     Float(f64),
     Char(u8),
     // adding enumerations here makes no sense.