/// <summary>
///
/// </summary>
/// <returns></returns>
public Exp Expr()
{
TOKEN l_token;
Exp RetValue = Term();
while (Current_Token == TOKEN.TOK_PLUS || Current_Token == TOKEN.TOK_SUB)
{
l_token = Current_Token;
Current_Token = GetToken();
Exp e1 = Expr();
RetValue = new BinaryExp(RetValue, e1,
l_token == TOKEN.TOK_PLUS ? OPERATOR.PLUS : OPERATOR.MINUS);
}
return(RetValue);
}
/// <summary>
///
/// </summary>
public Exp Term()
{
TOKEN l_token;
Exp RetValue = Factor();
while (Current_Token == TOKEN.TOK_MUL || Current_Token == TOKEN.TOK_DIV)
{
l_token = Current_Token;
Current_Token = GetToken();
Exp e1 = Term();
RetValue = new BinaryExp(RetValue, e1,
l_token == TOKEN.TOK_MUL ? OPERATOR.MUL : OPERATOR.DIV);
}
return(RetValue);
}
public UnaryExp(Exp a, OPERATOR op)
{
_ex1 = new BinaryExp(new NumericConstant(0), a, _op);
}