/// <summary>
/// Move on stack of tokens while the specified predicate is true
/// </summary>
/// <param name="t"> 1st token </param>
/// <param name="tokens"> stack with 2nd token </param>
/// <param name="pr"></param>
/// <returns></returns>
public static List <IToken> MoveWhile(IToken t, Stack <IToken> tokens, IPredicateOf2 <IToken, IToken> pr)
{
List <IToken> result = new List <IToken>();
while (Check(t, tokens, pr))
{
result.Add(tokens.Pop());
}
return(result);
}
/// <summary>
/// Defines trueness of the specified predicate towards
/// two specific tokens
/// </summary>
/// <param name="t1"> 1st token </param>
/// <param name="tokens"> stack with 2nd token on top </param>
/// <param name="pr"></param>
/// <returns></returns>
public static bool Check(IToken t1, Stack <IToken> tokens, IPredicateOf2 <IToken, IToken> pr)
{
return(tokens.Count != 0 && pr.Execute(t1, tokens.Peek()));
}
