note ikegami <blockquote><p><i>How do I dynamically redefine imported subroutines?</i></blockquote> <p>That's actually quite easy, but <c>say</c> is not being imported; it's not even a subroutine! <c>say</c> is an operator, and <c>use feature 'say';</c> merely controls whether the compiler recognises it or not. (It always recognises <c>CORE::say</c>, though.) <p>Some operators can be overridden from within Perl by overriding <c>GLOBAL::CORE::op</c>, and some can't. The following checks whether <c>say</c> can be overridden this way: <c> >perl -E"say defined(prototype('CORE::say')) ?'yes':'no'" no </c> <p>Its funky syntax doesn't permit it. <c> say say LIST say FILEHANDLE LIST say BLOCK LIST </c> <p>It could be done using a CallChecker, but that involves dropping to C/XS. 1017898 1017898