| private static IsPossibleUnary ( OperatorType operatorType ) : bool | ||
| operatorType | OperatorType | |
| return | bool | |
/// <summary>
/// Given token stream and operator type determines if operator is unary
/// </summary>
/// <param name="tokens">Token stream</param>
/// <param name="operatorType">Operator type</param>
/// <param name="offset">Offset of the operator relatively to the current token position</param>
public static bool IsUnaryOperator(TokenStream <RToken> tokens, OperatorType operatorType, int offset = 0)
{
bool possibleUnary = Operator.IsPossibleUnary(operatorType);
if (!possibleUnary)
{
return(false);
}
if (tokens.Position == offset)
{
// First operator in the expression is unary
return(true);
}
// If operator is preceded by an operator, it is then unary
// Look back two tokens since operator parsing already consumed its token.
if (tokens.LookAhead(offset - 1).TokenType == RTokenType.Operator)
{
return(true);
}
return(false);
}
