Suppress HSL Error

Hamilton (Venus)
1

Hi, me again (sorry)!

Does anyone know how to swallow/surpress an HSL error?

Say I had some HSL code that was expecting an error and returning false if an error occurred, and true if it didn’t, is there a way for the error to occur but not show up in the tracefile? I thought the errorHandler should prevent the error from showing?

I currently have (stripped down) the following in a function:

        onerror goto __errorHandler;
        // ** Something that may trigger error **
        return (hslTrue);

        __errorHandler: {
            err.Clear();
            return (hslFalse);
        }

Thanks!

2

Hi Gareth - That is the precise function of the onerror statement. It is basically the HSL version of a try/catch. Any exception that occurs during a grouping of code within an ‘onerror goto id’ block will result in execution to bypass any remaining code within the block and jump to the id. Errors which trigger a jump to the id block will not interrupt run time.

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This is also available by default and routinely used in method editor, and is not a feature exclusive to HSL. You can even force your own errors via logic to intentionally skip groupings of code and intentionally enter a handling block. I use this frequently as a form of a ‘goto’ - check the HSLErrLib functions in the example code capture below.

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You will find that the autogenerated HSL from these type of user error handling blocks in method editor yields the same onerror statement syntax.

-Nick

2 Likes
3

Hi Nick,
Yes, it jumps into the error handler fine, but it still shows the error in the trace file. Is there a way to supress that?
Thanks

4

Unfortunately no, there is not. That is built into VENUS.

-Nick

5

Ok, thanks!