Has anyone ever done this before when the name of the module is not known until runtime? Here is what I'm dealing with: At some point in the flow of my code, I pull a value from a database and store it in, say, $module. The value in $module is the fully-qualified package name of the module. Now, all modules pulled from the database adhere to a strict API, and must export the run() method, so I at least know that. However, I'm having trouble loading the module at all: 
if ($module) {
   eval "use $module";
   eval "$module::run()";
}
I end up getting "Use of uninitialized value in concatenation (.)" on stderr, and it points to the line where I perform the `use'. Why? Shouldn't the EXPR version of `eval' be able to interpolate $module and hand it off to `use'? I even put parentheses around $module so that it might evaluate first, but to no avail. Now, hardcoding it with the name of the module that is getting assigned to $module works perfectly, so I know that the module is loadable (its path is in @INC and everything, and I can call it like foo::bar::run() just fine if I hardcode it). So, what's the story? Is it even possible to load a module during runtime when the module name is stored in a scalar? Michael

In reply to Loading a module at runtime... by Anonymous Monk

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