'deprecated' functions in Lua 5.2.0-work3

[David Kolf <kolf@...>]

Hello,

i was a bit confused by the word 'deprecated' as I usually understood
this as "it is still functional, but should not be used for new code".
But in Lua 5.2.0-work3 the functions ipairs, set/getfenv, log10,
table.maxn actually raise an error so I would call them 'disabled'
rather than 'deprecated'. You can put most of them back in with a
define, but I guess the standard compilation is what matters. Otherwise
I would reverse the define so you have to explicitly exclude deprecated
functions.

Without the compatibility mode the functions still exist but throw an
error ("'ipairs' deprecated"). Is this special error necessary instead
of the default error ("attempt to call global 'ipairs' (a nil value)")?
If the functions were removed entirely you could check their
functionality using "if ipairs then ... end". This does not work when
there is a function that just throws an error. (You could check it with
'pcall', but I would prefer a simple 'if').

For the compatibility compilation of Lua 5.2.0 I would prefer it if the
old behavior of ipairs was kept (stopping at the first nil). But this
was already mentioned by others.

Best regards and thanks for maintaining Lua,

David