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Topic: Odd Behaviour (Read 758 times) |
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CryptoMan
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Re: Odd Behaviour
« Reply #7 on: Aug 21st, 2016, 4:25pm » |
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Thanks for pointing me towards SEE.
I missed that subject and I will learn how to use it.
I have been strugling all last week and all this weekend trying to understand the logic and errors.
One issue I am having is the following. If I make a mistake and give a wrong [label], LBB does not stop and give an error pop up saying:
"Unresolved [label], execution stopped on Line XXXX" but rather wanders off to infinity and only resolution is Task Manager Kill button and at this stage I observe a CPU usage of around 30%. In normal flow this is less than 1%. Maybe it is trying to find that label beyond the limits of program code space or something you can better explain.
Another puzzling thing is Not in function at Line 0 error which is very puzzling. It succesfully compiles but then at run stage this error comes. Evidently for something like this GLOBAL p,q,r, ,x,y,z
a mistake I made when I was weeding out my code where I removed a redundant global variable and forgot to remove the comma. Instead of stopping the compilation and pointing out to line this is happening.
Maybe a two pass compilation with the first pass with stronger syntax and error checking and more clearly reporting errors and if this stage is clear than going about what is now doing could be better. As it is now, it is not very forgiving. No mercy for mistakes. And, it is really costing a lot of time trying to understand what is going on.
This is why I was looking for the old XREF software I remember from the early days of Basic listing all variables and on which lines this variable is used. Obviously one can write such a software himself but being lazy and lots of code to convert to LBB, I was wondering if somebody already knows such a tool. I noticed Notepad++ has a nice feature highlighting the variable all over the source code - not always but most of the times. That helps during this conversion.
OK. I must go back to my conversion and clean up work.
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tsh73
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Re: Odd Behaviour
« Reply #8 on: Aug 21st, 2016, 5:06pm » |
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Quote:| This is why I was looking for the old XREF software I remember from the early days of Basic listing all variables and on which lines this variable is used. Obviously one can write such a software himself but being lazy and lots of code to convert to LBB, I was wondering if somebody already knows such a tool |
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Have you tried program from reply#4 of your question on LB forum?
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Richard Russell
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Re: Odd Behaviour
« Reply #9 on: Aug 21st, 2016, 5:16pm » |
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on Aug 21st, 2016, 4:25pm, CryptoMan wrote:| If I make a mistake and give a wrong [label], LBB does not stop and give an error |
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As always, I wish you would give an example! Normally LBB will report an error; try this code:
Code: goto [non.existent.label]
end
This reports (at run-time) "No such line at line 1". So if you are not receiving this error message I need to see a (preferably simple) self-contained program that demonstrates the issue.
Quote:| Evidently for something like this GLOBAL p,q,r, ,x,y,z |
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I agree that the error message you receive in this case is less than informative! If you look at the BBC BASIC code generated it's clear why it is happening, but ideally LBB ought to report something more obvious. I'll see if there's a simple (and safe) change I could make.
Quote:| As it is now, it is not very forgiving. No mercy for mistakes. |
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I've explained before why the error reporting is poor. It's because LBB was originally envisaged as a tool that you would use to 'boost' a program that had already been developed and tested in LB 4, therefore the expectation was that the program would not have any syntax errors. Now LBB has developed into more of a stand-alone IDE, in which you can write programs from scratch, ideally the error reporting should be better than it is.
Quote:| I was wondering if somebody already knows such a tool. |
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There's LBReader by Jim Brossman (mknarr) which lists all the variables, arrays etc. used in a program. See this thread at the LB Community forum.
Richard.
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tsh73
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Re: Odd Behaviour
« Reply #10 on: Aug 21st, 2016, 6:25pm » |
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LBReader by Jim Brossman (mknarr)
lists stuff and counts how much times it used
XREF - A LB Cross Referencer by terciops
lists lines where stuff is used.
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