fix: disallow exponents, export identifier from lexer

src/main/wacc/lexer.scala

@@ -25,7 +25,6 @@ object lexer {
     spaceDesc = SpaceDesc.plain.copy(
       lineCommentStart = "#"
     ),
-    // TODO - See BNF 1.1 and Table 5 2.3.6
     textDesc = TextDesc.plain.copy(
       graphicCharacter =
         Basic(c => c >= ' ' && c != '\\' && c != '\'' && c != '"'),
@@ -40,21 +39,17 @@ object lexer {
           "r" -> '\r'
         )
       )
+    ),
+    numericDesc = NumericDesc.plain.copy(
+      decimalExponentDesc = ExponentDesc.NoExponents
     )
   )
 
   private val lexer = Lexer(desc)
-
-  // Enforce 32-bit signed integer range - see 1.5
-  // TODO By default leadingZerosAllowed = true in NumericDesc - Wacc doesnt specify (I think) but should reach consensus
+  val ident = lexer.lexeme.names.identifier
   val integer = lexer.lexeme.integer.decimal32[Int]
-
-  // TODO Check if textDesc can handle this
   val charLit = lexer.lexeme.character.ascii
-
-  // TODO Check if textDesc can handle this
   val stringLit = lexer.lexeme.string.ascii
-
   val implicits = lexer.lexeme.symbol.implicits
 
   def fully[A](p: Parsley[A]): Parsley[A] = lexer.fully(p)