feat: type-checker returns micro wacc

src/main/wacc/Frontend/microWacc.scala

@@ -19,7 +19,7 @@ object microWacc {
       extends Expr(identTy)
       with CallTarget(identTy)
       with LValue
-  case class ArrayElem(name: Ident, indices: NonEmptyList[Expr])(ty: SemType)
+  case class ArrayElem(value: LValue, indices: NonEmptyList[Expr])(ty: SemType)
       extends Expr(ty)
       with LValue
 
@@ -48,6 +48,23 @@ object microWacc {
     case And
     case Or
   }
+  object BinaryOperator {
+    def fromAst(op: ast.BinaryOp): BinaryOperator = op match {
+      case _: ast.Add       => Add
+      case _: ast.Sub       => Sub
+      case _: ast.Mul       => Mul
+      case _: ast.Div       => Div
+      case _: ast.Mod       => Mod
+      case _: ast.Greater   => Greater
+      case _: ast.GreaterEq => GreaterEq
+      case _: ast.Less      => Less
+      case _: ast.LessEq    => LessEq
+      case _: ast.Eq        => Eq
+      case _: ast.Neq       => Neq
+      case _: ast.And       => And
+      case _: ast.Or        => Or
+    }
+  }
 
   // Statements
   sealed trait Stmt