Re: What is supposed to happen if there is an error in a vim script?

On 31/03/11 6:25 PM, Christian Brabandt wrote:
> On Thu, March 31, 2011 8:38 am, Rostyslaw Lewyckyj wrote:
>> IF vim recognizes an error in a script, what does it do?
>> Where are the rules for this detailed?
>>
>> Suppose that while editing file.foo, I initiate a script
>> e.g. :so myscript.vim
>> and there is an error
>> e.g. the script looks for a non existing pattern in file.foo
>> After issuing its error message what is the expected action
>> for the general case:
>> 1. The script is immediately terminated, returning to the
>> invocation point?
>> 2. After possibly issuing an error message,
>> the script continues trying to execute with its next command.
>> In this case as if the search for the pattern had not failed?
>>
>> Are these kinds of exception rules spelled out explicitly
>> anywhere in the available documentation?
>> Not just mentioned in passing by an example!
>>
>> In my simple test case, it appears that 2. is the rule.
>> But of course I'm just seemingly poking a black box.
>
> Yes, in general, rule 2 applies. But when writing your script,
> you can define otherwise, using e.g. try/catch/finally or the abort
> keyword when defining a function.

Note that mappings abort on error, though. I think other commands like @ might,
too. Since both these can actually run scripts, one way or another, it somewhat
depends in what context your script is running how errors are handled. To be sure
how things will work, use :try.

Ben.

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