private void ParseBetweenExpr(TokenType t)
{
BinaryExpr lhs = new BinaryExpr();
BinaryExpr rhs = new BinaryExpr();
BinaryExpr expr = new BinaryExpr();
Expression center = _exprs.Pop();
Expression left = _exprs.Pop();
if (_tokens.LookAhead().TokenType != TokenType.OP_AND_L) {
throw new Exception("missing AND statement");
}
_tokens.Read();
ParseExpression();
Expression right = _exprs.Pop();
lhs.Left = left;
lhs.Operation = GetOperator(TokenType.OP_GTE);
lhs.Right = center;
rhs.Left = left;
rhs.Operation = GetOperator(TokenType.OP_LTE);
rhs.Right = right;
expr.Left = lhs;
expr.Right = rhs;
expr.Operation = GetOperator(TokenType.OP_AND_L);
_exprs.Push(expr);
}
private void MakeBinaryExpr(TokenType op)
{
BinaryExpr expr = new BinaryExpr();
expr.Operation = GetOperator(op);
expr.Right = _exprs.Pop();
expr.Left = _exprs.Pop();
_exprs.Push(expr);
}