Seriously, what's wrong with a much easier approach like this?

It could be much easier to read:

if (not $FOO_HAS_BEEN_CALLED) {

... if it were instead:

unless ($FOO_HAS_BEEN_CALLED) {

Otherwise, it seems reasonable.

In reply to Re^2: Is modifying the symbol table to redefine subroutines evil? by chromatic
in thread Is modifying the symbol table to redefine subroutines evil? by tlm

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