// TermOp -> * SignedFactor TermOp
// TermOp -> / SignedFactor TermOp
// TermOp -> EPSILON
Factor TermOp(Factor factor)
{
switch (lookahead.type)
{
case TokenType.MULTI:
GetNextToken();
factor.Multiply(SignedFactor());
return(TermOp(factor));
case TokenType.DEV:
GetNextToken();
factor.Divide(SignedFactor());
return(TermOp(factor));
default:
return(factor);
}
}
//SignedFactor -> + Factor | - Factor | Factor
Factor SignedFactor()
{
switch (lookahead.type)
{
case TokenType.ADD:
GetNextToken();
return(Factor());
case TokenType.SUB:
GetNextToken();
Factor t = Factor();
t.Multiply(new Term(-1));
return(t);
default:
return(Factor());
}
}
// TermOp -> * SignedFactor TermOp
// TermOp -> / SignedFactor TermOp
// TermOp -> EPSILON
Factor TermOp(Factor factor)
{
switch (lookahead.type) {
case TokenType.MULTI:
GetNextToken ();
factor.Multiply (SignedFactor ());
return TermOp (factor);
case TokenType.DEV:
GetNextToken ();
factor.Divide (SignedFactor ());
return TermOp (factor);
default:
return factor;
}
}