Re^2: Last Line Read? (Any way to use IO::Handle methods on a "First-Class" Filehandle?)

I'm sorry, but I'm confused with your statement.

$ perl -MIO::Handle -le 'open my $fh, "<", shift or die $!; print $fh-
+>input_line_number while <$fh>' a_file_name
1
2
3
4
.
.
.

$ perl -MIO::Handle -le 'open my $fh, "<", shift or die $!; print (\$f
+h)->input_line_number while <$fh>' a_filename
REF(0x99d7cdc)
Can't call method "input_line_number" without a package or object refe
+rence at -e line 1, <$fh> line 1.

# $fh = do {local *FH};   #bad
$ perl -MIO::Handle -le 'my $fh = do {local *FH}; open $fh, "<", shift
+ or die $!; print (\$fh)->input_line_number while <$fh>' a_file_name
GLOB(0x846ccdc)
Can't call method "input_line_number" without a package or object refe
+rence at -e line 1, <FH> line 1.
[download]

Update: Added example code with "#bad" mark

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Comment on Re^2: Last Line Read? (Any way to use IO::Handle methods on a "First-Class" Filehandle?) Download Code

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Re^3: Last Line Read? (Any way to use IO::Handle methods on a "First-Class" Filehandle?) by ysth (Canon) on Jun 08, 2007 at 08:22 UTC
Always always always use warnings; teach your fingers to type -wle, not -le. You are doing (print(\$fh))->input_line_number there, not print((\$fh)->input_line_number).	[reply]
Re^4: Last Line Read? (Any way to use IO::Handle methods on a "First-Class" Filehandle?) by naikonta (Curate) on Jun 08, 2007 at 08:42 UTC
OK, how about this? `$ cat /tmp/io.pl #!/usr/bin/perl use strict; use warnings; use IO::Handle; my $filename = shift \|\| $0; my $fh = IO::Handle->new; open $fh, $filename or die "failed on $filename: $!\n"; print((\$fh)->input_line_number, "\n") while <$fh>; #1 #print $fh->input_line_number, "\n" while <$fh>; #2 $ perl /tmp/io.pl Can't call method "input_line_number" on unblessed reference at /tmp/i +o.pl line 10, <GEN0> line 1.` [download] The #2 prints the line numbers correctly. Did I miss something? Please shed some light. Open source softwares? Share and enjoy. Make profit from them if you can. Yet, share and enjoy!	[reply] [d/l]
Re^5: Last Line Read? (Any way to use IO::Handle methods on a "First-Class" Filehandle?) by ysth (Canon) on Jun 08, 2007 at 09:11 UTC
Did I miss something? Just that I was trying to answer the parenthetical question in the title. `$ perl - foo use strict; use warnings; use IO::Handle; my $filename = shift \|\| $0; my $fh = do {local *FH}; open $fh, $filename or die "failed on $filename: $!\n"; print((\$fh)->input_line_number, "\n") while <$fh>; #1 #print $fh->input_line_number, "\n" while <$fh>; #2 __END__ Name "main::FH" used only once: possible typo at - line 6. 1 2 3 4 5 6 7 8 9 10` [download]	[reply] [d/l]