So, I don't want to be thick here, but here's my confusion. Take my baby example of a test.pl script and a TestModule.pm Perl module. What I'm interested in is in test.pl, finding the variables, declared using "my", that are at file level (i.e. outside of any function) in TestModule.pm. Now, being outside of any function in TestModule.pm, they are created when TestModule.pm is parsed. I've read somewhere that it's kind of like TestModule.pm is enclosed in '{' and '}'. I know from experience that these variables exist for the life of the script. So, it seems to me that the statement "Lexical variables are destroyed at the end of their scope." isn't relevant here, i.e. the "scope" of TestModule.pm doesn't end until the script test.pl ends.

I have gotten what I need by creating a function like this one in TestModule.pm and calling it from test.pl:

# ---------------------------------------------------------

sub GetMyMemoryMap {
    # --- returns hash:
    #     { <nameWSigil> => {
    #          Shared => <is_shared>,
    #          Size => <nBytes>,
    #          }}

require Devel::Size;
require threads::shared;

return {
    '$hUserInfo' => {
        Shared => threads::shared::is_shared($hUserInfo),
        Size => Devel::Size::total_size($hUserInfo),
        }
    };
} # GetMyMemoryMap()

# ----------------------------------------------------------

[download]

and it works. But it isn't automatic. I.e. it would require me to create such a function, which has to explicitly know what file level lexical variables exist in each of my Perl modules (the actual application has many, many Perl modules)

In reply to Re^12: Finding file level lexical variables by johndeighan
in thread Finding file level lexical variables by johndeighan

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