private bool ConsumeToken(Token.Symbol symbol, bool force)
{
if (tokens.Count == 0)
{
if (force)
{
throw new ParseError(String.Format(
"end of input while expecting token \"{0}\"",
symbol));
}
else
{
return(false);
}
}
if (tokens.Peek().Name == symbol)
{
tokens.Dequeue();
return(true);
}
else if (force)
{
throw new ParseError(String.Format(
"expected \"{0}\" found \"{1}\"",
symbol,
tokens.Peek().ToString()));
}
else
{
return(false);
}
}
private bool CanConsumeToken(Token.Symbol symbol)
{
if (tokens.Count == 0)
{
return(false);
}
if (tokens.Peek().Name == symbol)
{
return(true);
}
return(false);
}
private bool ConsumeToken(Token.Symbol symbol)
{
return(ConsumeToken(symbol, false));
}
