Andrej Bauer wrote:
> Thanks to Andreas, I'll have a look at the "old" code.
> 
> I think I understand the general idea of inserting "virtual" tokens,
> but the details confuse me still. So starting with
> 
>> if True:
>>     x = 3
>>     y = (2 +
>>       4 + 5)
>> else:
>>     x = 5
>>     if False:
>>         x = 8
>>         z = 2
> 
> Martin suggests the following:
> 
>> {
>> if True:
>> ;
>>    {
>>    x = 3
>>    ;
>>    y = (2 +
>>    ;
>>      {
>>      4 + 5)
>>      }
>>    }
>> ;
>> else:
>> ;
>>    {
>>    x = 5
>>    ;
>>    if False:
>>    ;
>>        {
>>        x = 8
>>        ;
>>        z = 2
>>        }
>>    }
>> }
> 
> I have two questions. Notice that the { ... } and ( ... ) need not be
> correctly nested (in the top half), so how are we going to deal with
> this?

It depends on the characteristics of your language.
It is generally easier to use several successive passes rather than trying to
do everything in one pass.


Martin

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