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__LINE__ gives wrong number
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__LINE__ gives wrong number
by bin liu-4
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Hi, The __LINE__ sometimes gives wrong number. To reproduce, run following program: --------begin of file gsm.cpp-------------- int main(int argc, char **argv) //line 3 char *foo[] = {"3F00"}; return 0; C:\cint>cint gsm.cpp C:\cint>cint gsm.cpp I encounter the issue with CINT v5.16.25 (checkout from cvs using tag v5-16-25) compiled by MSVC7 (Toolkit2003), note that v5.16.24 is without the issue.
I just tried latest v5.16.27, also has the issue.
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Re: __LINE__ gives wrong number
by Axel Naumann
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Hi liubin,
> So far the workaround works fine, so it is not urgent to fix if you > are still busy on restructuring CINT :-). it's still on the to-do list, and we are still busy with the new CINT. It's good to hear the problem also existed with older versions - this is what I expected. > Merry Christmas and Happy New Year! Same to you, if it's relevant for you :-) Cheers, Axel. On 2007-12-20 12:12, bin liu wrote: > Hi Axel, > > The problem (__LINE__ sometimes gives wrong number) still exist with > latest v5.16.28 on both Windows (msvc7) and Linux (Ubuntu). > > I said "that v5.16.24 is without the issue.", it was wrong. Even if > this sample (gsm.cpp) gives correct number with v5.16.24 but other > complex programs may also give wrong number with v5.16.24. > > Workaround is, invoke __LINE__ inside 'for' loop like: --------begin > of file gsm.cpp-------------- #include <stdio.h> //line 1 > > int main(int argc, char **argv) //line 3 { srand((unsigned)time( NULL > )); int i, j, k; > > char *foo[] = {"3F00"}; char *bar[] = {"7F107F202FE2"}; printf("k is > %d\n", k = (rand()%2)); for (i=0; i<sizeof(foo)/sizeof(foo[0]); i++){ > for (j=0; j<strlen(bar[i])/4; j++){ __LINE__; //<---- workaround if > (k) printf(""); } } printf("line %d\n", __LINE__); //line 17 > > return 0; } --------end of file gsm.cpp-------------- > > So far the workaround works fine, so it is not urgent to fix if you > are still busy on restructuring CINT :-). > > Merry Christmas and Happy New Year! > > Best regards, liubin > > 2007/11/7, Axel Naumann <Axel.Naumann@... > <mailto:Axel.Naumann@...>>: > > Hi, > > thanks for reporting this! I will probably fix it only after Dec 15, > though - we are very busy with restructuring CINT at the moment. > > Cheers, Axel. > > bin liu wrote: >> Hi, >> >> The __LINE__ sometimes gives wrong number. To reproduce, run > following >> program: >> >> --------begin of file gsm.cpp-------------- #include <stdio.h> >> //line 1 >> >> int main(int argc, char **argv) //line 3 { srand((unsigned)time( >> NULL )); int i, j, k; >> >> char *foo[] = {"3F00"}; char *bar[] = {"7F107F202FE2"}; printf("k >> is %d\n", k = (rand()%2)); for (i=0; i<sizeof(foo)/sizeof(foo[0]); >> i++){ for (j=0; j<strlen(bar[i])/4; j++){ if (k) //if k=0, the >> __LINE__ at line 17 becomes 14, > if k=1, >> it is 16 printf(""); } } printf("line %d\n", __LINE__); //line 17 >> >> return 0; } --------end of file gsm.cpp-------------- >> >> C:\cint>cint gsm.cpp k is 0 line 14 >> >> C:\cint>cint gsm.cpp k is 1 line 16 >> >> I encounter the issue with CINT v5.16.25 (checkout from cvs using >> tag v5-16-25) compiled by MSVC7 (Toolkit2003), note that v5.16.24 >> is > without >> the issue. >> >> >> >> I just tried latest v5.16.27, also has the issue. >> >> >> Thanks & Regards, Liu Bin >> > > |
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