public override IProgramPart VisitUnarySign(FSQLParser.UnarySignContext context)
{
var right = Visit(context.right) as IExpression;
var op = context.op;
return(op.Type != FSQLLexer.MINUS
? right
: OneTermExpression.Create(right, r => r * -1, "-"));
}
public override IProgramPart VisitInvertBoolean(FSQLParser.InvertBooleanContext context)
{
var right = Visit(context.boolExpr) as IExpression;
return(OneTermExpression.Create(right, r => !r, "NOT "));
}