[fpc-pascal] FPImage and GetDataLineStart

Sven Barth pascaldragon at googlemail.com
Fri Apr 22 11:28:57 CEST 2011

On 22.04.2011 11:19, Florian Klämpfl wrote:
> Am 22.04.2011 11:18, schrieb Florian Klämpfl:
>> Am 22.04.2011 00:08, schrieb Jonas Maebe:
>>> On 21 Apr 2011, at 23:26, Sven Barth wrote:
>>>> On 21.04.2011 21:45, Michael Van Canneyt wrote:
>>>>> Threefold: a) The compiler's handling of generics is still beta
>>>>> code in my opinion. As far as I know, the original problem I
>>>>> reported when writing the docs for them is still not solved.
>>>> May I ask out of curiosity which problem you mean?
>>> The main problem with generics as they are implemented in FPC, is
>>> that they are basically macros. That means if you use a type
>>> "tsomerecord" in a generic implementation, and in a unit in which the
>>> generic is specialised another type with that name is visible, this
>>> other type will suddenly be used. The same goes for functions and
>>> every other identifier, because it's a token record/replay
>>> mechanism.
>> No. The symtablestack state is restore. But this leads to other problems
>> like overloaded operators for the current type being ignored.
> See
> http://bugs.freepascal.org/view.php?id=15480

Ok, thanks.

What about the folling idea (this might not sound ideal yet, but it's a 
first idea - at least for me ^^):
* scan all symtables for operators for the types that are used for 
* add these operators to a temporary symtable
* insert this symtable into the restored stack (currently I don't know 
the best location to put it in though)
* free the temporary symtable (without freeing the operator symbols of 
course) when the stack is reset


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