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package

Perl 5 version 10.1 documentation
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package

  • package NAMESPACE

  • package

    Declares the compilation unit as being in the given namespace. The scope of the package declaration is from the declaration itself through the end of the enclosing block, file, or eval (the same as the my operator). All further unqualified dynamic identifiers will be in this namespace. A package statement affects only dynamic variables--including those you've used local on--but not lexical variables, which are created with my. Typically it would be the first declaration in a file to be included by the require or use operator. You can switch into a package in more than one place; it merely influences which symbol table is used by the compiler for the rest of that block. You can refer to variables and filehandles in other packages by prefixing the identifier with the package name and a double colon: $Package::Variable . If the package name is null, the main package as assumed. That is, $::sail is equivalent to $main::sail (as well as to $main'sail , still seen in older code).

    See Packages in perlmod for more information about packages, modules, and classes. See perlsub for other scoping issues.