我写了一个特殊的导入函数,将在几个地方使用,我希望能够“使用ImportRenamer;”在这些模块中,让他们使用从ImportRenamer获得的导入.我该怎么办?
编辑:换句话说:如何在不运行的情况下导入’import’?
解决方法
UPDATE
现在OP澄清了他的需求,这确实应该以类似于Exported的方式完成,确切地说,通过全局赋值将子引用注入调用者的命名空间.例:
############################################### package ImportRenamer; use strict; sub import_me { print "I am a cool importer\n"; } sub import { my ($callpkg)=caller(0); print "Setting ${callpkg}::import to ImportRenamer::import_me\n"; no strict "refs"; *{$callpkg."::import"} = \&ImportRenamer::import_me; # Work happens here!!! use strict "refs"; } 1; ############################################### package My; use strict; use ImportRenamer; 1; ############################################### package My2; use strict; use ImportRenamer; 1; ###############################################
而且测试:
> perl -e '{ package main; use My; use My2; 1;}' Setting My::import to ImportRenamer::import_me I am a cool importer Setting My2::import to ImportRenamer::import_me I am a cool importer
原始答案
除了调用导入方法“import”之外,您不需要做任何特殊操作.使用已经调用import(),参见perldoc use:
use Module LIST
Imports some semantics into the current package from the named module,
generally by aliasing certain subroutine or variable names into your package.It is exactly equivalent to:
BEGIN { require Module; Module->import( LIST ); }