#line is indeed use to report the source of the code that come after
the directive. I am just not sure on how to get back to the initial
value of __LINE__, __FILE__ after the chunk of generated code has been
included.
OK I misunderstood. You want to use #line to change the current line
number, and then set it back to what is should be after you are finished?
I dont know anything special you can do with #line but maybe you could
someone get the value of __LINE__ and then set it back? #line __LINE__ ? I
know that #line can work with macros after it. Would something like
#define CUR_POS __LINE__
#line 500
... you generated code here ...
#line CUR_POS
havent tried this, just an idea.
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