Fixes

lib/miniFun/Parser.mly

@@ -13,7 +13,7 @@
 %token <int> INT
 %token COMMA COLUMN LEFTPAR RIGHTPAR CMPLESS CMPGREATER PLUS MINUS TIMES
 %token DIVISION MODULO POWER ASSIGNMENT BAND BOR CMP CMPLESSEQ CMPGREATEREQ
-%token FIRST SECOND
+%token FIRST SECOND QUESTIONMARK
 %token EOF
 
 %type <t_exp> prg
@@ -90,6 +90,7 @@ texp:
 typeexp:
   | TYPEINT                               {IntegerType}
   | TYPEBOOL                              {BooleanType}
+  | QUESTIONMARK                          {UnknownType}
   | v = delimited(LEFTPAR, typeexp, RIGHTPAR)
                                           {v}
   | a = typeexp; COMMA; b = typeexp       {TupleType (a, b)}