feat: filenames in errors

src/main/wacc/frontend/Error.scala

@@ -2,6 +2,7 @@ package wacc
 
 import wacc.ast.Position
 import wacc.types._
+import java.io.File
 
 private val SYNTAX_ERROR = 100
 private val SEMANTIC_ERROR = 200
@@ -18,13 +19,13 @@ enum Error {
   case TypeMismatch(pos: Position, expected: SemType, got: SemType, msg: String)
   case InternalError(pos: Position, msg: String)
 
-  case SyntaxError(msg: String)
+  case SyntaxError(file: File, msg: String)
 }
 
 extension (e: Error) {
   def exitCode: Int = e match {
-    case Error.SyntaxError(_) => SYNTAX_ERROR
-    case _                    => SEMANTIC_ERROR
+    case Error.SyntaxError(_, _) => SYNTAX_ERROR
+    case _                       => SEMANTIC_ERROR
   }
 }
 
@@ -38,12 +39,22 @@ extension (e: Error) {
 def formatError(error: Error)(using errorContent: String): String = {
   val sb = new StringBuilder()
 
+  /** Format the file of an error
+    *
+    * @param file
+    *   File of the error
+    */
+  def formatFile(file: File): Unit = {
+    sb.append(s"File: ${file.toPath.toRealPath()}\n")
+  }
+
   /** Function to format the position of an error
     *
     * @param pos
     *   Position of the error
     */
   def formatPosition(pos: Position): Unit = {
+    formatFile(pos.file)
     sb.append(s"(line ${pos.line}, column ${pos.column}):\n")
   }
 
@@ -67,7 +78,7 @@ def formatError(error: Error)(using errorContent: String): String = {
   }
 
   error match {
-    case Error.SyntaxError(_) =>
+    case Error.SyntaxError(_, _) =>
       sb.append("Syntax error:\n")
     case _ =>
       sb.append("Semantic error:\n")
@@ -105,11 +116,11 @@ def formatError(error: Error)(using errorContent: String): String = {
       formatPosition(pos)
       sb.append(s"Internal error: $msg")
       formatHighlight(pos, 1)
-    case Error.SyntaxError(msg) =>
+    case Error.SyntaxError(file, msg) =>
+      formatFile(file)
       sb.append(msg)
       sb.append("\n")
   }
 
   sb.toString()
-
 }