/// <summary>
/// Pops a set of tokens from the token queue until the occurence
/// is satisfied
/// </summary>
/// <param name="tokens">The token list to pop from</param>
public void PopFrom(Queue <TokenBase> tokens)
{
while (tokens.Count != 0
&&
!(
TokenTypeOne.IsAssignableFrom(tokens.Peek().GetType())
||
TokenTypeTwo.IsAssignableFrom(tokens.Peek().GetType())
)
)
{
tokens.Dequeue();
}
}
/// <summary>
/// Checks if the list of tokens is valid for the occurence
/// </summary>
/// <param name="tokens">The tokens</param>
/// <returns>True if valid, otherwise false</returns>
public bool IsValidFor(Queue <TokenBase> tokens)
{
bool valid = tokens.Count != 0 &&
(
TokenTypeOne.IsAssignableFrom(tokens.Peek().GetType())
||
TokenTypeTwo.IsAssignableFrom(tokens.Peek().GetType())
);
if (valid)
{
tokens.Dequeue();
}
return(valid);
}