diff --git a/compiler/src/passes/atomize/mod.rs b/compiler/src/passes/atomize/mod.rs
index 0b811ac..fa28dc3 100644
--- a/compiler/src/passes/atomize/mod.rs
+++ b/compiler/src/passes/atomize/mod.rs
@@ -2,9 +2,9 @@ pub mod atomize;
 mod display;
 
 use crate::passes::parse::types::Type;
-use crate::passes::parse::{BinaryOp, Def, Typed, UnaryOp};
+use crate::passes::parse::{BinaryOp, Def, Lit, Typed, UnaryOp};
 use crate::passes::select::InstrSelected;
-use crate::passes::validate::TLit;
+use crate::passes::validate::Int;
 use crate::utils::gen_sym::UniqueSym;
 use derive_more::Display;
 use itertools::Itertools;
@@ -81,7 +81,7 @@ pub enum AExpr<'p> {
 
 #[derive(Copy, Clone, Display)]
 pub enum Atom<'p> {
-    Val { val: TLit },
+    Val { val: Lit<Int> },
     Var { sym: UniqueSym<'p> },
 }
 
diff --git a/compiler/src/passes/explicate/explicate_assign.rs b/compiler/src/passes/explicate/explicate_assign.rs
index 79d3499..30ce4f0 100644
--- a/compiler/src/passes/explicate/explicate_assign.rs
+++ b/compiler/src/passes/explicate/explicate_assign.rs
@@ -2,8 +2,7 @@ use crate::passes::atomize::{AExpr, Atom};
 use crate::passes::explicate::explicate::Env;
 use crate::passes::explicate::{explicate_pred, ExprExplicated, TailExplicated};
 
-use crate::passes::parse::{Meta, Typed};
-use crate::passes::validate::TLit;
+use crate::passes::parse::{Lit, Meta, Typed};
 use crate::utils::gen_sym::{gen_sym, UniqueSym};
 
 pub fn explicate_assign<'p>(
@@ -119,7 +118,7 @@ pub fn explicate_assign<'p>(
                 Meta {
                     meta: bnd.meta,
                     inner: AExpr::Atom {
-                        atm: Atom::Val { val: TLit::Unit },
+                        atm: Atom::Val { val: Lit::Unit },
                     },
                 },
                 tail,
diff --git a/compiler/src/passes/explicate/explicate_pred.rs b/compiler/src/passes/explicate/explicate_pred.rs
index 08205da..15bea9f 100644
--- a/compiler/src/passes/explicate/explicate_pred.rs
+++ b/compiler/src/passes/explicate/explicate_pred.rs
@@ -3,8 +3,7 @@ use crate::passes::explicate::explicate::Env;
 use crate::passes::explicate::explicate_assign::explicate_assign;
 use crate::passes::explicate::{ExprExplicated, TailExplicated};
 use crate::passes::parse::types::Type;
-use crate::passes::parse::{BinaryOp, Meta, UnaryOp};
-use crate::passes::validate::TLit;
+use crate::passes::parse::{BinaryOp, Lit, Meta, UnaryOp};
 use crate::utils::gen_sym::gen_sym;
 
 pub fn explicate_pred<'p>(
@@ -29,7 +28,7 @@ pub fn explicate_pred<'p>(
                 exprs: [
                     Atom::Var { sym },
                     Atom::Val {
-                        val: TLit::Bool(true),
+                        val: Lit::Bool(true),
                     },
                 ],
             },
@@ -38,7 +37,7 @@ pub fn explicate_pred<'p>(
         },
         AExpr::Atom {
             atm: Atom::Val {
-                val: TLit::Bool(val),
+                val: Lit::Bool(val),
             },
             ..
         } => {
@@ -179,7 +178,7 @@ pub fn explicate_pred<'p>(
         AExpr::FunRef { .. }
         | AExpr::Atom {
             atm: Atom::Val {
-                val: TLit::Int { .. } | TLit::Unit,
+                val: Lit::Int { .. } | Lit::Unit,
             },
             ..
         }
diff --git a/compiler/src/passes/parse/grammar.lalrpop b/compiler/src/passes/parse/grammar.lalrpop
index a9c1384..9649a36 100644
--- a/compiler/src/passes/parse/grammar.lalrpop
+++ b/compiler/src/passes/parse/grammar.lalrpop
@@ -1,5 +1,5 @@
 use crate::passes::parse::{
-    BinaryOp, DefParsed, ExprParsed, InstrParsed, Lit, Meta, Param, PrgParsed, Spanned, Type, TypeDef, UnaryOp, types::Int,
+    BinaryOp, DefParsed, ExprParsed, InstrParsed, Lit, Meta, Param, PrgParsed, Spanned, Type, TypeDef, UnaryOp, types::IntType,
 };
 use crate::passes::select::{VarArg, Reg, Imm};
 use functor_derive::Functor;
@@ -159,8 +159,8 @@ Param: Param<Spanned<&'input str>> = {
 }
 
 Type: Type<Spanned<&'input str>> = {
-    "I64" => Type::Int(Int::I64),
-    "U64" => Type::Int(Int::I64),
+    "I64" => Type::Int(IntType::I64),
+    "U64" => Type::Int(IntType::U64),
     "Bool" => Type::Bool,
     "Unit" => Type::Unit,
     "Never" => Type::Never,
@@ -336,9 +336,7 @@ ExprCall<T>: ExprParsed<'input> = {
 
 ExprAtom<T>: ExprParsed<'input> = {
     <val:Int> => ExprParsed::Lit {
-        val: Lit::Int {
-            val,
-        },
+        val: Lit::Int(val),
     },
     <val:Bool> => ExprParsed::Lit { val: Lit::Bool(val) },
     "unit" => ExprParsed::Lit { val: Lit::Unit },
diff --git a/compiler/src/passes/parse/mod.rs b/compiler/src/passes/parse/mod.rs
index 19a17a1..4af7236 100644
--- a/compiler/src/passes/parse/mod.rs
+++ b/compiler/src/passes/parse/mod.rs
@@ -50,7 +50,7 @@ pub enum Def<IdentVars, IdentFields, Expr> {
 }
 
 pub type DefParsed<'p> = Def<Spanned<&'p str>, Spanned<&'p str>, Spanned<ExprParsed<'p>>>;
-pub type ExprParsed<'p> = Expr<Spanned<&'p str>, Spanned<&'p str>, Lit<'p>, Span>;
+pub type ExprParsed<'p> = Expr<Spanned<&'p str>, Spanned<&'p str>, Lit<&'p str>, Span>;
 pub type InstrParsed<'p> = Instr<VarArg<Spanned<&'p str>>, Spanned<&'p str>>;
 
 #[derive(Clone, Debug)]
@@ -331,11 +331,11 @@ pub enum BinaryOp {
 }
 
 /// A literal value.
-#[derive(Display)]
-pub enum Lit<'p> {
+#[derive(Display, Debug, Copy, Clone)]
+pub enum Lit<Int: Display> {
     /// Integer literal, representing a signed 64-bit number.
-    #[display(fmt = "{val}")]
-    Int { val: &'p str },
+    #[display(fmt = "{_0}")]
+    Int(Int),
     /// Boolean literal, representing a value of *true* or *false*.
     #[display(fmt = "{}", r#"if *_0 { "true" } else { "false" }"#)]
     Bool(bool),
diff --git a/compiler/src/passes/parse/types.rs b/compiler/src/passes/parse/types.rs
index 50c3cd1..c78ad5f 100644
--- a/compiler/src/passes/parse/types.rs
+++ b/compiler/src/passes/parse/types.rs
@@ -6,7 +6,7 @@ use std::fmt::Display;
 #[display(bound = "A: Display")]
 pub enum Type<A> {
     #[display(fmt = "{_0}")]
-    Int(Int),
+    Int(IntType),
     #[display(fmt = "Bool")]
     Bool,
     #[display(fmt = "Unit")]
@@ -23,8 +23,8 @@ pub enum Type<A> {
 }
 
 /// Integer types
-#[derive(Debug, Clone, Display, Eq, PartialEq)]
-pub enum Int {
+#[derive(Display, Debug, Copy, Clone, Eq, PartialEq)]
+pub enum IntType {
     I8,
     U8,
     I16,
diff --git a/compiler/src/passes/reveal/mod.rs b/compiler/src/passes/reveal/mod.rs
index 448691e..58de654 100644
--- a/compiler/src/passes/reveal/mod.rs
+++ b/compiler/src/passes/reveal/mod.rs
@@ -1,9 +1,9 @@
 mod display;
 pub mod reveal;
 
-use crate::passes::parse::{BinaryOp, Def, Typed, UnaryOp};
+use crate::passes::parse::{BinaryOp, Def, Lit, Typed, UnaryOp};
 use crate::passes::select::InstrSelected;
-use crate::passes::validate::TLit;
+use crate::passes::validate::Int;
 use crate::utils::gen_sym::UniqueSym;
 use derive_more::Display;
 use itertools::Itertools;
@@ -20,7 +20,7 @@ pub type DefRevealed<'p> = Def<UniqueSym<'p>, &'p str, Typed<'p, RExpr<'p>>>;
 
 pub enum RExpr<'p> {
     Lit {
-        val: TLit,
+        val: Lit<Int>,
     },
     Var {
         sym: UniqueSym<'p>,
diff --git a/compiler/src/passes/select/select.rs b/compiler/src/passes/select/select.rs
index 3dbea9b..8b3a7ed 100644
--- a/compiler/src/passes/select/select.rs
+++ b/compiler/src/passes/select/select.rs
@@ -1,12 +1,12 @@
 use crate::passes::atomize::Atom;
 use crate::passes::eliminate::{ExprEliminated, FunEliminated, PrgEliminated, TailEliminated};
 use crate::passes::parse::types::Type;
-use crate::passes::parse::{BinaryOp, Meta, UnaryOp};
+use crate::passes::parse::{BinaryOp, Lit, Meta, UnaryOp};
 use crate::passes::select::{
     Block, Cnd, FunSelected, InstrSelected, VarArg, X86Selected, CALLEE_SAVED_NO_STACK,
     CALLER_SAVED,
 };
-use crate::passes::validate::{TInt, TLit};
+use crate::passes::validate::Int;
 use crate::utils::gen_sym::{gen_sym, UniqueSym};
 use crate::*;
 use std::collections::HashMap;
@@ -258,20 +258,20 @@ fn select_atom(expr: Atom<'_>) -> VarArg<UniqueSym<'_>> {
     match expr {
         Atom::Val { val } => {
             match val {
-                TLit::Int(int) => {
+                Lit::Int(int) => {
                     match int {
-                        TInt::I8(_) => todo!(),
-                        TInt::U8(_) => todo!(),
-                        TInt::I16(_) => todo!(),
-                        TInt::U16(_) => todo!(),
-                        TInt::I32(_) => todo!(),
-                        TInt::U32(_) => todo!(),
-                        TInt::I64(int) => imm32!(int as i32), // not correct yet
-                        TInt::U64(_) => todo!(),
+                        Int::I8(_) => todo!(),
+                        Int::U8(_) => todo!(),
+                        Int::I16(_) => todo!(),
+                        Int::U16(_) => todo!(),
+                        Int::I32(_) => todo!(),
+                        Int::U32(_) => todo!(),
+                        Int::I64(int) => imm32!(int as i32), // not correct yet
+                        Int::U64(_) => todo!(),
                     }
                 }
-                TLit::Bool(bool) => imm32!(bool as i32), // todo: can be smaller
-                TLit::Unit => imm32!(0),                 // todo: can be smaller
+                Lit::Bool(bool) => imm32!(bool as i32), // todo: can be smaller
+                Lit::Unit => imm32!(0),                 // todo: can be smaller
             }
         }
         Atom::Var { sym } => var!(sym),
@@ -290,21 +290,21 @@ fn select_cmp(op: BinaryOp) -> Cnd {
     }
 }
 
-impl From<TLit> for u32 {
-    fn from(value: TLit) -> Self {
+impl From<Lit<Int>> for u32 {
+    fn from(value: Lit<Int>) -> Self {
         match value {
-            TLit::Int(int) => match int {
-                TInt::I8(int) => int as u32,
-                TInt::U8(int) => int as u32,
-                TInt::I16(int) => int as u32,
-                TInt::U16(int) => int as u32,
-                TInt::I32(int) => int as u32,
-                TInt::U32(int) => int,
-                TInt::I64(int) => int as u32,
-                TInt::U64(int) => int as u32,
+            Lit::Int(int) => match int {
+                Int::I8(int) => int as u32,
+                Int::U8(int) => int as u32,
+                Int::I16(int) => int as u32,
+                Int::U16(int) => int as u32,
+                Int::I32(int) => int as u32,
+                Int::U32(int) => int,
+                Int::I64(int) => int as u32,
+                Int::U64(int) => int as u32,
             },
-            TLit::Bool(bool) => bool as u32,
-            TLit::Unit => 0,
+            Lit::Bool(bool) => bool as u32,
+            Lit::Unit => 0,
         }
     }
 }
diff --git a/compiler/src/passes/validate/constrain/lit.rs b/compiler/src/passes/validate/constrain/lit.rs
index 95837f2..f831a6d 100644
--- a/compiler/src/passes/validate/constrain/lit.rs
+++ b/compiler/src/passes/validate/constrain/lit.rs
@@ -1,4 +1,4 @@
-use crate::passes::parse::types::Int;
+use crate::passes::parse::types::IntType;
 use crate::passes::parse::{Constrained, Lit, Span};
 use crate::passes::validate::constrain::uncover_globals::Env;
 use crate::passes::validate::error::TypeError;
@@ -8,21 +8,21 @@ use crate::passes::validate::{ExprConstrained, MetaConstrained};
 pub fn constrain_lit<'p>(
     env: &mut Env<'_, 'p>,
     span: Span,
-    val: Lit<'p>,
+    val: Lit<&'p str>,
 ) -> Result<Constrained<ExprConstrained<'p>>, TypeError> {
     // Get the type of the literal.
     let typ = match &val {
-        Lit::Int { val } => match val.rfind(&['i', 'u']) {
+        Lit::Int(val) => match val.rfind(&['i', 'u']) {
             Some(suffix) => {
                 let int = match &val[suffix..] {
-                    "i8" => Int::I64,
-                    "u8" => Int::U64,
-                    "i16" => Int::I64,
-                    "u16" => Int::U64,
-                    "i32" => Int::I64,
-                    "u32" => Int::U64,
-                    "i64" => Int::I64,
-                    "u64" => Int::U64,
+                    "i8" => IntType::I64,
+                    "u8" => IntType::U64,
+                    "i16" => IntType::I64,
+                    "u16" => IntType::U64,
+                    "i32" => IntType::I64,
+                    "u32" => IntType::U64,
+                    "i64" => IntType::I64,
+                    "u64" => IntType::U64,
                     _ => unreachable!(),
                 };
                 PartialType::Int(int)
diff --git a/compiler/src/passes/validate/mod.rs b/compiler/src/passes/validate/mod.rs
index a261b80..e560b5d 100644
--- a/compiler/src/passes/validate/mod.rs
+++ b/compiler/src/passes/validate/mod.rs
@@ -32,16 +32,16 @@ pub struct PrgConstrained<'p> {
 }
 
 pub type DefValidated<'p> = Def<UniqueSym<'p>, &'p str, Typed<'p, ExprValidated<'p>>>;
-pub type ExprValidated<'p> = Expr<UniqueSym<'p>, &'p str, TLit, Type<UniqueSym<'p>>>;
+pub type ExprValidated<'p> = Expr<UniqueSym<'p>, &'p str, Lit<Int>, Type<UniqueSym<'p>>>;
 
 pub type DefConstrained<'p> =
     Def<Spanned<UniqueSym<'p>>, Spanned<&'p str>, Constrained<ExprConstrained<'p>>>;
 pub type ExprConstrained<'p> =
-    Expr<Spanned<UniqueSym<'p>>, Spanned<&'p str>, Lit<'p>, MetaConstrained>;
+    Expr<Spanned<UniqueSym<'p>>, Spanned<&'p str>, Lit<&'p str>, MetaConstrained>;
 
 pub type DefUniquified<'p> =
     Def<Spanned<UniqueSym<'p>>, Spanned<&'p str>, Spanned<ExprUniquified<'p>>>;
-pub type ExprUniquified<'p> = Expr<Spanned<UniqueSym<'p>>, Spanned<&'p str>, Lit<'p>, Span>;
+pub type ExprUniquified<'p> = Expr<Spanned<UniqueSym<'p>>, Spanned<&'p str>, Lit<&'p str>, Span>;
 pub type InstrUniquified<'p> = Instr<VarArg<Spanned<UniqueSym<'p>>>, Spanned<UniqueSym<'p>>>;
 
 pub struct MetaConstrained {
@@ -50,17 +50,7 @@ pub struct MetaConstrained {
 }
 
 #[derive(Copy, Clone, Debug, PartialEq, Display)]
-pub enum TLit {
-    #[display(fmt = "{_0}")]
-    Int(TInt),
-    #[display(fmt = "{}", r#"if *_0 { "true" } else { "false" }"#)]
-    Bool(bool),
-    #[display(fmt = "unit")]
-    Unit,
-}
-
-#[derive(Copy, Clone, Debug, PartialEq, Display)]
-pub enum TInt {
+pub enum Int {
     I8(i8),
     U8(u8),
     I16(i16),
diff --git a/compiler/src/passes/validate/partial_type.rs b/compiler/src/passes/validate/partial_type.rs
index a191237..b4dd3a8 100644
--- a/compiler/src/passes/validate/partial_type.rs
+++ b/compiler/src/passes/validate/partial_type.rs
@@ -1,11 +1,11 @@
-use crate::passes::parse::types::Int;
+use crate::passes::parse::types::IntType;
 use crate::utils::gen_sym::UniqueSym;
 use crate::utils::union_find::{UnionFind, UnionIndex};
 use itertools::Itertools;
 
 #[derive(Debug, Clone)]
 pub enum PartialType<'p> {
-    Int(Int),
+    Int(IntType),
     IntAmbiguous,
     Bool,
     Unit,
diff --git a/compiler/src/passes/validate/resolve.rs b/compiler/src/passes/validate/resolve.rs
index 218b292..160a244 100644
--- a/compiler/src/passes/validate/resolve.rs
+++ b/compiler/src/passes/validate/resolve.rs
@@ -1,11 +1,10 @@
-use crate::passes::parse::types::{Int, Type};
+use crate::passes::parse::types::{IntType, Type};
 use crate::passes::parse::{Constrained, Expr, Lit, Meta, Param, Span, Spanned, TypeDef, Typed};
 use crate::passes::select::{Instr, InstrSelected, VarArg};
 use crate::passes::validate::error::TypeError;
 use crate::passes::validate::partial_type::PartialType;
 use crate::passes::validate::{
-    DefConstrained, DefValidated, ExprConstrained, ExprValidated, PrgConstrained, PrgValidated,
-    TInt, TLit,
+    DefConstrained, DefValidated, ExprConstrained, ExprValidated, Int, PrgConstrained, PrgValidated,
 };
 use crate::utils::gen_sym::UniqueSym;
 use crate::utils::union_find::{UnionFind, UnionIndex};
@@ -165,42 +164,42 @@ fn resolve_expr<'p>(
     let expr = match expr.inner {
         Expr::Lit { val } => {
             let val = match val {
-                Lit::Int { val, .. } => match &typ {
+                Lit::Int(val) => match &typ {
                     Some(typ) => {
                         let int = match typ {
                             Type::Int(int) => match int {
-                                Int::I8 => todo!(),
-                                Int::U8 => TInt::U8(resolve_int_lit(
+                                IntType::I8 => todo!(),
+                                IntType::U8 => Int::U8(resolve_int_lit(
                                     val,
                                     expr.meta.span,
                                     u8::from_str_radix,
                                 )?),
-                                Int::I16 => TInt::I16(resolve_int_lit(
+                                IntType::I16 => Int::I16(resolve_int_lit(
                                     val,
                                     expr.meta.span,
                                     i16::from_str_radix,
                                 )?),
-                                Int::U16 => TInt::U16(resolve_int_lit(
+                                IntType::U16 => Int::U16(resolve_int_lit(
                                     val,
                                     expr.meta.span,
                                     u16::from_str_radix,
                                 )?),
-                                Int::I32 => TInt::I32(resolve_int_lit(
+                                IntType::I32 => Int::I32(resolve_int_lit(
                                     val,
                                     expr.meta.span,
                                     i32::from_str_radix,
                                 )?),
-                                Int::U32 => TInt::U32(resolve_int_lit(
+                                IntType::U32 => Int::U32(resolve_int_lit(
                                     val,
                                     expr.meta.span,
                                     u32::from_str_radix,
                                 )?),
-                                Int::I64 => TInt::I64(resolve_int_lit(
+                                IntType::I64 => Int::I64(resolve_int_lit(
                                     val,
                                     expr.meta.span,
                                     i64::from_str_radix,
                                 )?),
-                                Int::U64 => TInt::U64(resolve_int_lit(
+                                IntType::U64 => Int::U64(resolve_int_lit(
                                     val,
                                     expr.meta.span,
                                     u64::from_str_radix,
@@ -208,7 +207,7 @@ fn resolve_expr<'p>(
                             },
                             _ => unreachable!(),
                         };
-                        TLit::Int(int)
+                        Lit::Int(int)
                     }
                     None => {
                         return Err(TypeError::IntegerAmbiguous {
@@ -216,8 +215,8 @@ fn resolve_expr<'p>(
                         })
                     }
                 },
-                Lit::Bool(bool) => TLit::Bool(bool),
-                Lit::Unit => TLit::Unit,
+                Lit::Bool(bool) => Lit::Bool(bool),
+                Lit::Unit => Lit::Unit,
             };
             Expr::Lit { val }
         }
diff --git a/compiler/src/utils/split_test.rs b/compiler/src/utils/split_test.rs
index a05cfdc..18ef7fe 100644
--- a/compiler/src/utils/split_test.rs
+++ b/compiler/src/utils/split_test.rs
@@ -1,4 +1,3 @@
-use crate::passes::validate::TLit;
 use std::cell::OnceCell;
 
 /// Splits the inputs, expected outputs and expected return from the test.
diff --git a/compiler/tests/integration.rs b/compiler/tests/integration.rs
index 752093e..df1aa20 100644
--- a/compiler/tests/integration.rs
+++ b/compiler/tests/integration.rs
@@ -1,7 +1,6 @@
 #![cfg(unix)]
 
 use compiler::passes::parse::parse::parse_program;
-use compiler::passes::validate::TLit;
 use compiler::utils::split_test::{split_test, str_to_int};
 use std::fs::OpenOptions;
 use std::io::{BufRead, Write};