Re: [bug-gawk] FPAT bug?

[Ed Morton]

FYI someone else with a slightly older gawk gets what (to me at least) is the 
expected output:

I get a different result here...

3 ,,3
        1 []
        2 []
        3 [3]

3 ,,3
        1 []
        2 []
        3 [3]


$ awk --version
GNU Awk 4.1.2, API: 1.1 (GNU MPFR 3.1.0-p3, GNU MP 5.0.2)
Copyright (C) 1989, 1991-2015 Free Software Foundation.




On 3/31/2017 11:52 PM, Ed Morton wrote:
> Is this a bug?
>
> $ cat tst.awk
> BEGIN { FPAT="[^,]*" }
> {
>      print NF, $0
>      for (i=1;i<=NF;i++)
>          print "\t" i, "[" $i "]"
>      print ""
> }
>
> $ cat -v file.csv
> ,,3
> ,,3
>
> $ awk -f tst.awk file.csv
> 3 ,,3
>         1 []
>         2 []
>         3 [3]
>
> 2 ,,3
>         1 []
>         2 [3]
>
> Note that awk recognizes 3 fields in the first line but only 2 in the second. 
> If it's not a bug - what's causing that behavior?
>
> $ gawk --version
> GNU Awk 4.1.4, API: 1.1 (GNU MPFR 3.1.5, GNU MP 6.1.2)
> Copyright (C) 1989, 1991-2016 Free Software Foundation.
>
> $ $SHELL --version
> GNU bash, version 4.4.12(3)-release (x86_64-unknown-cygwin)
> Copyright (C) 2016 Free Software Foundation, Inc.
>
> Regards,
>
>     Ed.