Data::Postponed::OnceOnly Data::Postponed::OnceOnly can put off computing a value as long as possible but throw errors if later changes are attempted.
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computing values Perl class computing values posponed data posponed

Data::Postponed::OnceOnly Description

Data::Postponed::OnceOnly can put off computing a value as long as possible but throw errors if later changes are attempted. Data::Postponed::OnceOnly can put off computing a value as long as possible but throw errors if later changes are attempted.SYNOPSISExample using postpone() use Data::Postponed 'postpone'; %functions = ( foobar => 'foo' ); $code = "sub " . postpone( $functions{foobar} ) . " { return time }"; $functions{foobar} = "baz"; # Reflects the new name of 'bar' instead of 'foo'. $code isn't # overloaded anymore. print $code; # This line is now an error because $functions{foobar} is readonly. $functions{foobar} = "quux"; # This line isn't reached. print $code;Example using the OO use Data::Postponed; %functions = ( foobar => 'foo' ); $code = "sub " . Data::Postpone::OnceOnly->new( $functions{foobar} ) . " { return time }"; $functions{foobar} = "baz"; # Reflects the new name of 'bar' instead of 'foo'; print $code; # This line is now an error because $functions{foobar} is readonly. $functions{foobar} = "quux"; # This line isn't reached. print $code; Requirements: · Perl

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