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Re: End of subroutine

by marcussen (Pilgrim)
on Nov 07, 2008 at 05:21 UTC ( #722156=note: print w/ replies, xml ) Need Help??


in reply to End of subroutine

It is used outside the subroutine, your question is actually: why is 1; used at the end of a module?

A use statement (as in use module;) evals the contents of a file. The last expression in the file must evaluate to true, or the eval dies.

UPDATE: Correction of my statement by ikegami (see below);
Confucius says kill mosquito unless cannon


Comment on Re: End of subroutine
Re^2: End of subroutine
by ikegami (Pope) on Nov 07, 2008 at 05:29 UTC

    A use statement (as in use module;) evals the contents of a file. The last expression in the file must evaluate to true, or the eval dies.

    Not quite. eval never dies based on the value returned by the evaluated expression.

    >perl -e"eval { 0 }" >

    require (and thus use) dies if the values returned by the module is false.

    >copy nul Module.pm 1 file(s) copied. >perl -e"use Module;" Module.pm did not return a true value at -e line 1. BEGIN failed--compilation aborted at -e line 1. >echo 1; > Module.pm >perl -e"use Module;" >

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