public bool doTest()
{
ReqDisplay.title("Requirement #10a");
ReqDisplay.message("Testing special tokens");
Lexer.Toker toker = new Lexer.Toker();
HashSet <string> oneCharToks = toker.oneCharTokens();
ReqDisplay.showSet(oneCharToks, "one char Tokens:");
Console.Write("\n adding token \"@\"");
toker.addOneCharToken("@");
ReqDisplay.showSet(oneCharToks, "one char Tokens:");
Console.Write("\n removing token \"@\"");
toker.removeOneCharToken("@");
ReqDisplay.showSet(oneCharToks, "one char Tokens:");
HashSet <string> twoCharToks = toker.twoCharTokens();
ReqDisplay.showSet(twoCharToks, "two char Tokens:");
return(result);
}