private static Words instance <T>(Scanner wscanner, string[] ops, string[] keywords, bool cs,
FromRange <string, T> toWord)
{
checkDup(ops, keywords, true);
WordsData data = combine(Operators.instance(ops), Keywords.getInstance("word", wscanner, keywords, cs, toWord));
return(toWords(data));
}
private static WordsData combine(WordsData w1, WordsData w2)
{
TokenMap map1 = w1.Tokens;
TokenMap map2 = w2.Tokens;
Lexer[] l1 = w1.Lexers;
Lexer[] l2 = w2.Lexers;
TokenMap map = delegate(string n)
{
object t1 = map1(n);
if (t1 != null)
{
return(t1);
}
return(map2(n));
};
Lexer[] l = new Lexer[l1.Length + l2.Length];
Array.Copy(l1, 0, l, 0, l1.Length);
Array.Copy(l2, 0, l, l1.Length, l2.Length);
return(new WordsData(map, l));
}
/// <summary> Creates a Words object for lexing the operators with names specified in ops.
/// Operators are lexed as TokenReserved.
/// </summary>
/// <param name="ops">the operator names.
/// </param>
/// <returns> the Words instance.
/// </returns>
internal static Words getOperators(string[] ops)
{
WordsData data = Operators.instance(ops);
return(new Words(data.Tokens, Parsers.Plus(data.Lexers)));
}
private static Words toWords(WordsData data)
{
return(new Words(data.Tokens, Parsers.Plus(data.Lexers)));
}
