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.\" -*- mode: troff; coding: utf-8 -*- .\" Automatically generated by Pod::Man 5.01 (Pod::Simple 3.43) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" \*(C` and \*(C' are quotes in nroff, nothing in troff, for use with C<>. .ie n \{\ . ds C` "" . ds C' "" 'br\} .el\{\ . ds C` . ds C' 'br\} .\" .\" Escape single quotes in literal strings from groff's Unicode transform. .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" .\" If the F register is >0, we'll generate index entries on stderr for .\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index .\" entries marked with X<> in POD. Of course, you'll have to process the .\" output yourself in some meaningful fashion. .\" .\" Avoid warning from groff about undefined register 'F'. .de IX .. .nr rF 0 .if \n(.g .if rF .nr rF 1 .if (\n(rF:(\n(.g==0)) \{\ . if \nF \{\ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . if !\nF==2 \{\ . nr % 0 . nr F 2 . \} . \} .\} .rr rF .\" ======================================================================== .\" .IX Title "PerlIO::scalar 3" .TH PerlIO::scalar 3 2020-12-28 "perl v5.38.0" "Perl Programmers Reference Guide" .\" For nroff, turn off justification. Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH NAME PerlIO::scalar \- in\-memory IO, scalar IO .SH SYNOPSIS .IX Header "SYNOPSIS" .Vb 5 \& my $scalar = \*(Aq\*(Aq; \& ... \& open my $fh, "<", \e$scalar or die; \& open my $fh, ">", \e$scalar or die; \& open my $fh, ">>", \e$scalar or die; .Ve .PP or .PP .Vb 5 \& my $scalar = \*(Aq\*(Aq; \& ... \& open my $fh, "<:scalar", \e$scalar or die; \& open my $fh, ">:scalar", \e$scalar or die; \& open my $fh, ">>:scalar", \e$scalar or die; .Ve .SH DESCRIPTION .IX Header "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. .PP Attempting to open a read-only scalar for writing will fail, and if warnings are enabled, produce a warning. .SH "IMPLEMENTATION NOTE" .IX Header "IMPLEMENTATION NOTE" \&\f(CW\*(C`PerlIO::scalar\*(C'\fR only exists to use XSLoader to load C code that provides support for treating a scalar as an "in memory" file. One does not need to explicitly \f(CW\*(C`use PerlIO::scalar\*(C'\fR.