expression
Description:
public virtual signal bool expression (string property, SearchCriteriaOp op, string value, Error error)
The expression signal is emitted whenever an expression is parsed.
Set error and return false if an error occurred.
Parameters:
| property |
The property |
| op |
The operator as SearchCriteriaOp |
| value |
The value as string |
| error |
Place-holder for any possible errors from handler |