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PerlIO::scalar(3pm) | Perl Programmers Reference Guide | PerlIO::scalar(3pm) |
NAME¶
PerlIO::scalar - in-memory IO, scalar IO
SYNOPSIS¶
my $scalar = ''; ... open my $fh, "<", \$scalar or die; open my $fh, ">", \$scalar or die; open my $fh, ">>", \$scalar or die;
or
my $scalar = ''; ... open my $fh, "<:scalar", \$scalar or die; open my $fh, ">:scalar", \$scalar or die; open my $fh, ">>:scalar", \$scalar or die;
DESCRIPTION¶
A filehandle is opened but the file operations are performed "in-memory" on a scalar variable. All the normal file operations can be performed on the handle. The scalar is considered a stream of bytes. Currently fileno($fh) returns -1.
Attempting to open a read-only scalar for writing will fail, and if warnings are enabled, produce a warning.
IMPLEMENTATION NOTE¶
"PerlIO::scalar" only exists as a stub. One does not need to explicitly "use PerlIO::scalar".
2024-07-03 | perl v5.40.0 |