Re: Re-requiring modules

[Robert Virding <robert.virding@...>]

Ah, ok. Then I misinterpreted the manual.

Robert

----- Original Message -----
> From: "Finn Wilcox" <finnw@finnw.me.uk>
> To: "Lua mailing list" <lua-l@lists.lua.org>
> Sent: Wednesday, 23 October, 2013 12:19:40 AM
> Subject: Re: Re-requiring modules
> 
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> On 22/10/2013 23:53, Robert Virding wrote:
> > Yes, BUT NO. Well it shouldn't work. In the 5.2 manual description
> > of package.loaded it says
> > 
> > "package.loaded
> > 
> > A table used by require to control which modules are already
> > loaded. When you require a module modname and
> > package.loaded[modname] is not false, require simply returns the
> > value stored there.
> > 
> > This variable is only a reference to the real table; assignments to
> > this variable do not change the table used by require."
> > 
> > Which seems to imply that these suggestions should not work. This
> > is why I was asking as otherwise it is easy.
> 
> Assigning to "package.loaded[x]" - works (because the table you are
> modifying is the same one that really is used to look up package names)
> 
> Assigning to "package.loaded", (i.e. attempting to replace the table)
> does not work (because there are hidden references to the table, in
> the registry and/or upvalues of C functions, and 'require' will
> continue to use this table and not the one that you provide.
> 
> This is the case in the latest Lua 5.1 and 5.2, LuaJIT 2.0 and 2.1
> (though they use different methods to find the table.)
> 
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