diff --git a/src/main/wacc/ast.scala b/src/main/wacc/ast.scala
index c6e743e..9afd8d9 100644
--- a/src/main/wacc/ast.scala
+++ b/src/main/wacc/ast.scala
@@ -1,6 +1,9 @@
 package wacc
 
-import parsley.generic._
+import parsley.Parsley
+import parsley.generic.ErrorBridge
+import parsley.position._
+import parsley.syntax.zipped._
 import cats.data.NonEmptyList
 
 object ast {
@@ -14,80 +17,97 @@ object ast {
   sealed trait Expr6 extends Expr5
 
   // Atoms
-  case class IntLiter(v: Int) extends Expr6
-  object IntLiter extends ParserBridge1[Int, IntLiter]
-  case class BoolLiter(v: Boolean) extends Expr6
-  object BoolLiter extends ParserBridge1[Boolean, BoolLiter]
-  case class CharLiter(v: Char) extends Expr6
-  object CharLiter extends ParserBridge1[Char, CharLiter]
-  case class StrLiter(v: String) extends Expr6
-  object StrLiter extends ParserBridge1[String, StrLiter]
-  case object PairLiter extends Expr6 with ParserBridge0[PairLiter.type]
-  case class Ident(v: String) extends Expr6 with LValue
-  object Ident extends ParserBridge1[String, Ident]
-  case class ArrayElem(name: Ident, indices: NonEmptyList[Expr]) extends Expr6 with LValue
-  object ArrayElem extends ParserBridge2[Ident, NonEmptyList[Expr], ArrayElem]
-  case class Parens(expr: Expr) extends Expr6
-  object Parens extends ParserBridge1[Expr, Parens]
+  case class IntLiter(v: Int)(pos: Position) extends Expr6
+  object IntLiter extends ParserBridgePos1[Int, IntLiter]
+  case class BoolLiter(v: Boolean)(pos: Position) extends Expr6
+  object BoolLiter extends ParserBridgePos1[Boolean, BoolLiter]
+  case class CharLiter(v: Char)(pos: Position) extends Expr6
+  object CharLiter extends ParserBridgePos1[Char, CharLiter]
+  case class StrLiter(v: String)(pos: Position) extends Expr6
+  object StrLiter extends ParserBridgePos1[String, StrLiter]
+  case class PairLiter()(pos: Position) extends Expr6
+  object PairLiter extends Expr6 with ParserBridgePos0[PairLiter]
+  case class Ident(v: String)(pos: Position) extends Expr6 with LValue
+  object Ident extends ParserBridgePos1[String, Ident]
+  case class ArrayElem(name: Ident, indices: NonEmptyList[Expr])(pos: Position)
+      extends Expr6
+      with LValue
+  object ArrayElem extends ParserBridgePos2[Ident, NonEmptyList[Expr], ArrayElem]
+  case class Parens(expr: Expr)(pos: Position) extends Expr6
+  object Parens extends ParserBridgePos1[Expr, Parens]
 
   // Unary operators
-  case class Negate(x: Expr6) extends Expr6
-  object Negate extends ParserBridge1[Expr6, Negate]
-  case class Not(x: Expr6) extends Expr6
-  object Not extends ParserBridge1[Expr6, Not]
-  case class Len(x: Expr6) extends Expr6
-  object Len extends ParserBridge1[Expr6, Len]
-  case class Ord(x: Expr6) extends Expr6
-  object Ord extends ParserBridge1[Expr6, Ord]
-  case class Chr(x: Expr6) extends Expr6
-  object Chr extends ParserBridge1[Expr6, Chr]
+  sealed trait UnaryOp extends Expr {
+    val x: Expr
+  }
+  case class Negate(x: Expr6)(pos: Position) extends Expr6 with UnaryOp
+  object Negate extends ParserBridgePos1[Expr6, Negate]
+  case class Not(x: Expr6)(pos: Position) extends Expr6 with UnaryOp
+  object Not extends ParserBridgePos1[Expr6, Not]
+  case class Len(x: Expr6)(pos: Position) extends Expr6 with UnaryOp
+  object Len extends ParserBridgePos1[Expr6, Len]
+  case class Ord(x: Expr6)(pos: Position) extends Expr6 with UnaryOp
+  object Ord extends ParserBridgePos1[Expr6, Ord]
+  case class Chr(x: Expr6)(pos: Position) extends Expr6 with UnaryOp
+  object Chr extends ParserBridgePos1[Expr6, Chr]
 
   // Binary operators
-  case class Add(x: Expr4, y: Expr5) extends Expr4
-  object Add extends ParserBridge2[Expr4, Expr5, Add]
-  case class Sub(x: Expr4, y: Expr5) extends Expr4
-  object Sub extends ParserBridge2[Expr4, Expr5, Sub]
-  case class Mul(x: Expr5, y: Expr6) extends Expr5
-  object Mul extends ParserBridge2[Expr5, Expr6, Mul]
-  case class Div(x: Expr5, y: Expr6) extends Expr5
-  object Div extends ParserBridge2[Expr5, Expr6, Div]
-  case class Mod(x: Expr5, y: Expr6) extends Expr5
-  object Mod extends ParserBridge2[Expr5, Expr6, Mod]
-  case class Greater(x: Expr4, y: Expr4) extends Expr3
-  object Greater extends ParserBridge2[Expr4, Expr4, Greater]
-  case class GreaterEq(x: Expr4, y: Expr4) extends Expr3
-  object GreaterEq extends ParserBridge2[Expr4, Expr4, GreaterEq]
-  case class Less(x: Expr4, y: Expr4) extends Expr3
-  object Less extends ParserBridge2[Expr4, Expr4, Less]
-  case class LessEq(x: Expr4, y: Expr4) extends Expr3
-  object LessEq extends ParserBridge2[Expr4, Expr4, LessEq]
-  case class Eq(x: Expr3, y: Expr3) extends Expr2
-  object Eq extends ParserBridge2[Expr3, Expr3, Eq]
-  case class Neq(x: Expr3, y: Expr3) extends Expr2
-  object Neq extends ParserBridge2[Expr3, Expr3, Neq]
-  case class And(x: Expr2, y: Expr1) extends Expr1
-  object And extends ParserBridge2[Expr2, Expr1, And]
-  case class Or(x: Expr1, y: Expr) extends Expr
-  object Or extends ParserBridge2[Expr1, Expr, Or]
+  sealed trait BinaryOp extends Expr {
+    val x: Expr
+    val y: Expr
+  }
+  case class Add(x: Expr4, y: Expr5)(pos: Position) extends Expr4 with BinaryOp
+  object Add extends ParserBridgePos2[Expr4, Expr5, Add]
+  case class Sub(x: Expr4, y: Expr5)(pos: Position) extends Expr4 with BinaryOp
+  object Sub extends ParserBridgePos2[Expr4, Expr5, Sub]
+  case class Mul(x: Expr5, y: Expr6)(pos: Position) extends Expr5 with BinaryOp
+  object Mul extends ParserBridgePos2[Expr5, Expr6, Mul]
+  case class Div(x: Expr5, y: Expr6)(pos: Position) extends Expr5 with BinaryOp
+  object Div extends ParserBridgePos2[Expr5, Expr6, Div]
+  case class Mod(x: Expr5, y: Expr6)(pos: Position) extends Expr5 with BinaryOp
+  object Mod extends ParserBridgePos2[Expr5, Expr6, Mod]
+  case class Greater(x: Expr4, y: Expr4)(pos: Position) extends Expr3 with BinaryOp
+  object Greater extends ParserBridgePos2[Expr4, Expr4, Greater]
+  case class GreaterEq(x: Expr4, y: Expr4)(pos: Position) extends Expr3 with BinaryOp
+  object GreaterEq extends ParserBridgePos2[Expr4, Expr4, GreaterEq]
+  case class Less(x: Expr4, y: Expr4)(pos: Position) extends Expr3 with BinaryOp
+  object Less extends ParserBridgePos2[Expr4, Expr4, Less]
+  case class LessEq(x: Expr4, y: Expr4)(pos: Position) extends Expr3 with BinaryOp
+  object LessEq extends ParserBridgePos2[Expr4, Expr4, LessEq]
+  case class Eq(x: Expr3, y: Expr3)(pos: Position) extends Expr2 with BinaryOp
+  object Eq extends ParserBridgePos2[Expr3, Expr3, Eq]
+  case class Neq(x: Expr3, y: Expr3)(pos: Position) extends Expr2 with BinaryOp
+  object Neq extends ParserBridgePos2[Expr3, Expr3, Neq]
+  case class And(x: Expr2, y: Expr1)(pos: Position) extends Expr1 with BinaryOp
+  object And extends ParserBridgePos2[Expr2, Expr1, And]
+  case class Or(x: Expr1, y: Expr)(pos: Position) extends Expr with BinaryOp
+  object Or extends ParserBridgePos2[Expr1, Expr, Or]
 
   // Types
   sealed trait Type
   sealed trait BaseType extends Type with PairElemType
-  case object IntType extends BaseType with ParserBridge0[IntType.type]
-  case object BoolType extends BaseType with ParserBridge0[BoolType.type]
-  case object CharType extends BaseType with ParserBridge0[CharType.type]
-  case object StringType extends BaseType with ParserBridge0[StringType.type]
-  case class ArrayType(elemType: Type, dimensions: Int) extends Type with PairElemType
-  object ArrayType extends ParserBridge2[Type, Int, ArrayType]
-  case class PairType(fst: PairElemType, snd: PairElemType) extends Type
-  object PairType extends ParserBridge2[PairElemType, PairElemType, PairType]
+  case class IntType()(pos: Position) extends BaseType
+  object IntType extends ParserBridgePos0[IntType]
+  case class BoolType()(pos: Position) extends BaseType
+  object BoolType extends ParserBridgePos0[BoolType]
+  case class CharType()(pos: Position) extends BaseType
+  object CharType extends ParserBridgePos0[CharType]
+  case class StringType()(pos: Position) extends BaseType
+  object StringType extends ParserBridgePos0[StringType]
+  case class ArrayType(elemType: Type, dimensions: Int)(pos: Position)
+      extends Type
+      with PairElemType
+  object ArrayType extends ParserBridgePos2[Type, Int, ArrayType]
+  case class PairType(fst: PairElemType, snd: PairElemType)(pos: Position) extends Type
+  object PairType extends ParserBridgePos2[PairElemType, PairElemType, PairType]
 
   sealed trait PairElemType
-  case object UntypedPairType extends PairElemType with ParserBridge0[UntypedPairType.type]
+  case class UntypedPairType()(pos: Position) extends PairElemType
+  object UntypedPairType extends ParserBridgePos0[UntypedPairType]
 
   // waccadoodledo
-  case class Program(funcs: List[FuncDecl], main: NonEmptyList[Stmt])
-  object Program extends ParserBridge2[List[FuncDecl], NonEmptyList[Stmt], Program]
+  case class Program(funcs: List[FuncDecl], main: NonEmptyList[Stmt])(pos: Position)
+  object Program extends ParserBridgePos2[List[FuncDecl], NonEmptyList[Stmt], Program]
 
   // Function Definitions
   case class FuncDecl(
@@ -95,49 +115,115 @@ object ast {
       name: Ident,
       params: List[Param],
       body: NonEmptyList[Stmt]
-  )
-  object FuncDecl extends ParserBridge4[Type, Ident, List[Param], NonEmptyList[Stmt], FuncDecl]
+  )(pos: Position)
+  object FuncDecl extends ParserBridgePos4[Type, Ident, List[Param], NonEmptyList[Stmt], FuncDecl]
 
-  case class Param(paramType: Type, name: Ident)
-  object Param extends ParserBridge2[Type, Ident, Param]
+  case class Param(paramType: Type, name: Ident)(pos: Position)
+  object Param extends ParserBridgePos2[Type, Ident, Param]
 
   // Statements
   sealed trait Stmt
-  case object Skip extends Stmt with ParserBridge0[Skip.type]
-  case class VarDecl(varType: Type, name: Ident, value: RValue) extends Stmt
-  object VarDecl extends ParserBridge3[Type, Ident, RValue, VarDecl]
-  case class Assign(lhs: LValue, value: RValue) extends Stmt
-  object Assign extends ParserBridge2[LValue, RValue, Assign]
-  case class Read(lhs: LValue) extends Stmt
-  object Read extends ParserBridge1[LValue, Read]
-  case class Free(expr: Expr) extends Stmt
-  object Free extends ParserBridge1[Expr, Free]
-  case class Return(expr: Expr) extends Stmt
-  object Return extends ParserBridge1[Expr, Return]
-  case class Exit(expr: Expr) extends Stmt
-  object Exit extends ParserBridge1[Expr, Exit]
-  case class Print(expr: Expr, newline: Boolean) extends Stmt
-  object Print extends ParserBridge2[Expr, Boolean, Print]
-  case class If(cond: Expr, thenStmt: NonEmptyList[Stmt], elseStmt: NonEmptyList[Stmt]) extends Stmt
-  object If extends ParserBridge3[Expr, NonEmptyList[Stmt], NonEmptyList[Stmt], If]
-  case class While(cond: Expr, body: NonEmptyList[Stmt]) extends Stmt
-  object While extends ParserBridge2[Expr, NonEmptyList[Stmt], While]
-  case class Block(stmt: NonEmptyList[Stmt]) extends Stmt
-  object Block extends ParserBridge1[NonEmptyList[Stmt], Block]
+  case class Skip()(pos: Position) extends Stmt
+  object Skip extends ParserBridgePos0[Skip]
+  case class VarDecl(varType: Type, name: Ident, value: RValue)(pos: Position) extends Stmt
+  object VarDecl extends ParserBridgePos3[Type, Ident, RValue, VarDecl]
+  case class Assign(lhs: LValue, value: RValue)(pos: Position) extends Stmt
+  object Assign extends ParserBridgePos2[LValue, RValue, Assign]
+  case class Read(lhs: LValue)(pos: Position) extends Stmt
+  object Read extends ParserBridgePos1[LValue, Read]
+  case class Free(expr: Expr)(pos: Position) extends Stmt
+  object Free extends ParserBridgePos1[Expr, Free]
+  case class Return(expr: Expr)(pos: Position) extends Stmt
+  object Return extends ParserBridgePos1[Expr, Return]
+  case class Exit(expr: Expr)(pos: Position) extends Stmt
+  object Exit extends ParserBridgePos1[Expr, Exit]
+  case class Print(expr: Expr, newline: Boolean)(pos: Position) extends Stmt
+  object Print extends ParserBridgePos2[Expr, Boolean, Print]
+  case class If(cond: Expr, thenStmt: NonEmptyList[Stmt], elseStmt: NonEmptyList[Stmt])(
+      pos: Position
+  ) extends Stmt
+  object If extends ParserBridgePos3[Expr, NonEmptyList[Stmt], NonEmptyList[Stmt], If]
+  case class While(cond: Expr, body: NonEmptyList[Stmt])(pos: Position) extends Stmt
+  object While extends ParserBridgePos2[Expr, NonEmptyList[Stmt], While]
+  case class Block(stmt: NonEmptyList[Stmt])(pos: Position) extends Stmt
+  object Block extends ParserBridgePos1[NonEmptyList[Stmt], Block]
 
   sealed trait LValue
 
   sealed trait RValue
-  case class ArrayLiter(elems: List[Expr]) extends RValue
-  object ArrayLiter extends ParserBridge1[List[Expr], ArrayLiter]
-  case class NewPair(fst: Expr, snd: Expr) extends RValue
-  object NewPair extends ParserBridge2[Expr, Expr, NewPair]
-  case class Call(name: Ident, args: List[Expr]) extends RValue
-  object Call extends ParserBridge2[Ident, List[Expr], Call]
+  case class ArrayLiter(elems: List[Expr])(pos: Position) extends RValue
+  object ArrayLiter extends ParserBridgePos1[List[Expr], ArrayLiter]
+  case class NewPair(fst: Expr, snd: Expr)(pos: Position) extends RValue
+  object NewPair extends ParserBridgePos2[Expr, Expr, NewPair]
+  case class Call(name: Ident, args: List[Expr])(pos: Position) extends RValue
+  object Call extends ParserBridgePos2[Ident, List[Expr], Call]
 
   sealed trait PairElem extends LValue with RValue
-  case class Fst(elem: LValue) extends PairElem
-  object Fst extends ParserBridge1[LValue, Fst]
-  case class Snd(elem: LValue) extends PairElem
-  object Snd extends ParserBridge1[LValue, Snd]
+  case class Fst(elem: LValue)(pos: Position) extends PairElem
+  object Fst extends ParserBridgePos1[LValue, Fst]
+  case class Snd(elem: LValue)(pos: Position) extends PairElem
+  object Snd extends ParserBridgePos1[LValue, Snd]
+
+  // Parser bridges
+  case class Position(line: Int, column: Int, offset: Int, width: Int)
+
+  private def applyCon[A, B](
+      con: ((Int, Int), Int, Int) => A => B
+  )(ops: Parsley[A]): Parsley[B] =
+    (pos, offset, withWidth(ops)).zipped.map { (pos, off, res) =>
+      con(pos, off, res._2)(res._1)
+    }
+
+  trait ParserSingletonBridgePos[+A] extends ErrorBridge {
+    protected def con(pos: (Int, Int), offset: Int, width: Int): A
+    def from(op: Parsley[?]): Parsley[A] = error((pos, offset, withWidth(op)).zipped.map {
+      (pos, off, res) => con(pos, off, res._2)
+    })
+    final def <#(op: Parsley[?]): Parsley[A] = from(op)
+  }
+
+  trait ParserBridgePos0[+A] extends ParserSingletonBridgePos[A] {
+    def apply()(pos: Position): A
+
+    override final def con(pos: (Int, Int), offset: Int, width: Int): A =
+      apply()(Position(pos._1, pos._2, offset, width))
+  }
+
+  trait ParserBridgePos1[-A, +B] extends ParserSingletonBridgePos[A => B] {
+    def apply(a: A)(pos: Position): B
+    def apply(a: Parsley[A]): Parsley[B] = error((pos, offset, withWidth(a)).zipped.map {
+      (pos, off, res) => con(pos, off, res._2)(res._1)
+    })
+
+    override final def con(pos: (Int, Int), offset: Int, width: Int): A => B =
+      apply(_)(Position(pos._1, pos._2, offset, width))
+  }
+
+  trait ParserBridgePos2[-A, -B, +C] extends ParserSingletonBridgePos[((A, B)) => C] {
+    def apply(a: A, b: B)(pos: Position): C
+    def apply(a: Parsley[A], b: Parsley[B]): Parsley[C] = error(applyCon(con)((a, b).zipped))
+
+    override final def con(pos: (Int, Int), offset: Int, width: Int): ((A, B)) => C =
+      apply(_, _)(Position(pos._1, pos._2, offset, width))
+  }
+
+  trait ParserBridgePos3[-A, -B, -C, +D] extends ParserSingletonBridgePos[((A, B, C)) => D] {
+    def apply(a: A, b: B, c: C)(pos: Position): D
+    def apply(a: Parsley[A], b: Parsley[B], c: Parsley[C]): Parsley[D] = error(
+      applyCon(con)((a, b, c).zipped)
+    )
+
+    override final def con(pos: (Int, Int), offset: Int, width: Int): ((A, B, C)) => D =
+      apply(_, _, _)(Position(pos._1, pos._2, offset, width))
+  }
+
+  trait ParserBridgePos4[-A, -B, -C, -D, +E] extends ParserSingletonBridgePos[((A, B, C, D)) => E] {
+    def apply(a: A, b: B, c: C, d: D)(pos: Position): E
+    def apply(a: Parsley[A], b: Parsley[B], c: Parsley[C], d: Parsley[D]): Parsley[E] = error(
+      applyCon(con)((a, b, c, d).zipped)
+    )
+
+    override final def con(pos: (Int, Int), offset: Int, width: Int): ((A, B, C, D)) => E =
+      apply(_, _, _, _)(Position(pos._1, pos._2, offset, width))
+  }
 }