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April 05, 2005
improving Error/Exception system
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How about having more detailed Error messages?

1) ArrayBoundError: add the bad index

current:
# extern (C) static void _d_array_bounds(char[] filename, uint line);

suggestion:
# extern (C) static void _d_array_bounds(char[] filename, uint line,
# size_t badIndex);


2) SwitchError: add the uncaught value

current:
# extern (C) static void _d_switch_error(char[] filename, uint line);

suggestion:
# extern (C) static void _d_switch_error(char[] filename, uint line,
# void* badValue, TypeInfo badValueType);

Thomas


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April 05, 2005
Re: improving Error/Exception system
> suggestion:
> # extern (C) static void _d_array_bounds(char[] filename, uint line,
> # size_t badIndex);

Good idea.

> suggestion:
> # extern (C) static void _d_switch_error(char[] filename, uint line,
> # void* badValue, TypeInfo badValueType);

Feels dicey. What would the switch error print or do with the values? What 
if the badValue was a temporary value on the stack that just became invalid 
because of the throw?
April 05, 2005
Re: improving Error/Exception system
Ben Hinkle wrote:
>>suggestion:
>># extern (C) static void _d_array_bounds(char[] filename, uint line,
>># size_t badIndex);
> 
> Good idea.
> 
>>suggestion:
>># extern (C) static void _d_switch_error(char[] filename, uint line,
>># void* badValue, TypeInfo badValueType);
> 
> Feels dicey. What would the switch error print or do with the values?

Good question.

> What if the badValue was a temporary value on the stack that just became invalid 
> because of the throw? 

I guess it would have to make a copy of the value.

An alternative would be to make _d_switch_error a template function....

Stewart.

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