Re: Lua 5.2 #... proposal and patch.
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- Subject: Re: Lua 5.2 #... proposal and patch.
- From: GrayFace <sergroj@...>
- Date: 2011年5月04日 11:02:58 +0700
I was also thinking about such things. I don't like the idea of making
#... return the number of arguments. I'm thinking about something like this:
function f1(args...) -- variable parameters tuple named 'args'
for i = 1, #args do
print(args[i])
end
args[1] = 5 -- why not? (out-of-bound case would generate an error)
return args... -- using the tuple name followed by "..." expands it
into all values
-- "return args" or print(args) would issue a syntax error, because
'args' isn't a real variable
end
Now, this can be expanded further:
function f2()
local r... = pcall(f1)
if not r[1] then
print("error: "..r[2])
end
return r...
end
--
Best regards,
Sergey Rozhenko mailto:sergroj@mail.ru