fix: escape characters within assembly

src/main/wacc/backend/asmGenerator.scala

@@ -7,6 +7,7 @@ object asmGenerator {
   import microWacc._
   import assemblyIR._
   import wacc.types._
+  import lexer.escapedChars
 
   val RAX = Register(RegSize.R64, RegName.AX)
   val EAX = Register(RegSize.E32, RegName.AX)
@@ -53,7 +54,7 @@ object asmGenerator {
       List(
         Directive.Int(str.size),
         LabelDef(s".L.str$i"),
-        Directive.Asciz(str.replace("\"", "\\\""))
+        Directive.Asciz(str.escaped)
       )
     }
 
@@ -387,4 +388,10 @@ object asmGenerator {
     // TODO: Might want to actually properly handle this with the LinkedHashMap too
     def align(): AsmLine = And(RSP, ImmediateVal(-16))
   }
+
+  private val escapedCharsMapping = escapedChars.map { case (k, v) => v -> s"\\$k" }
+  extension (s: String) {
+    private def escaped: String =
+      s.flatMap(c => escapedCharsMapping.getOrElse(c, c.toString))
+  }
 }

src/main/wacc/frontend/lexer.scala

@@ -39,6 +39,17 @@ val errConfig = new ErrorConfig {
   )
 }
 object lexer {
+  val escapedChars: Map[String, Int] = Map(
+    "0" -> '\u0000',
+    "b" -> '\b',
+    "t" -> '\t',
+    "n" -> '\n',
+    "f" -> '\f',
+    "r" -> '\r',
+    "\\" -> '\\',
+    "'" -> '\'',
+    "\"" -> '\"'
+  )
 
   /** Language description for the WACC lexer
     */
@@ -63,15 +74,9 @@ object lexer {
     textDesc = TextDesc.plain.copy(
       graphicCharacter = Basic(c => c >= ' ' && c != '\\' && c != '\'' && c != '"'),
       escapeSequences = EscapeDesc.plain.copy(
-        literals = Set('\\', '"', '\''),
-        mapping = Map(
-          "0" -> '\u0000',
-          "b" -> '\b',
-          "t" -> '\t',
-          "n" -> '\n',
-          "f" -> '\f',
-          "r" -> '\r'
-        )
+        literals =
+          escapedChars.filter { (s, chr) => chr.toChar.toString == s }.map(_._2.toChar).toSet,
+        mapping = escapedChars.filter { (s, chr) => chr.toChar.toString != s }
       )
     ),
     numericDesc = NumericDesc.plain.copy(