NAME Variable::Temp - Temporarily change the value of a variable. VERSION Version 0.04 SYNOPSIS use Variable::Temp 'temp'; my $x = 1; say $x; # 1 { temp $x = 2; say $x; # 2 } say $x; # 1 DESCRIPTION This module provides an utility routine that can be used to temporarily change the value of a scalar, array or hash variable, until the end of the current scope is reached where the original value of the variable is restored. It is similar to "local", except that it can be applied onto lexicals as well as globals, and that it replaces values by copying the new value into the container variable instead of by aliasing. FUNCTIONS "temp" temp $var; temp $var = $value; temp @var; temp @var = \@value; temp %var; temp %var = \%value; Temporarily replaces the value of the lexical or global variable $var by $value (respectively @var by @value, %var by %value), or by "undef" if $value is omitted (respectively empties @var and %var if the second argument is omitted), until the end of the current scope. Any subsequent assignments to this variable in the current (or any inferior) scope will not affect the original value which will be restored into the variable at scope end. Several "temp" calls can be made onto the same variable, and the restore are processed in reverse order. Note that destructors associated with the variable will not be called when "temp" sets the temporary value, but only at the natural end of life of the variable. They will trigger after any destructor associated with the replacement value. Due to a shortcoming in the handling of the "\$" prototype, which was addressed in "perl" 5.14, the pseudo-statement "temp $var = $value" will cause compilation errors on "perl" 5.12.x and below. If you want your code to run on these versions of "perl", you are encouraged to use "set_temp" instead. "set_temp" set_temp $var; set_temp $var => $value; set_temp @var; set_temp @var => \@value; set_temp %var; set_temp %var => \%value; A non-lvalue variant of "temp" that can be used with any version of "perl". EXPORT The functions "temp" and "set_temp" are only exported on request by specifying their names in the module import list. DEPENDENCIES perl 5.6. Exporter (core since perl 5). Scope::Upper. Variable::Magic 0.51. SEE ALSO Scope::Upper. "local" in perlfunc. AUTHOR Vincent Pit, "", . You can contact me by mail or on "irc.perl.org" (vincent). BUGS Please report any bugs or feature requests to "bug-variable-temp at rt.cpan.org", or through the web interface at . I will be notified, and then you'll automatically be notified of progress on your bug as I make changes. SUPPORT You can find documentation for this module with the perldoc command. perldoc Variable::Temp COPYRIGHT & LICENSE Copyright 2015,2017 Vincent Pit, all rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.