Re: Unexpected error using tostring

[Gé Weijers <ge@...>]

On Mon, Mar 4, 2019 at 9:11 PM Magicks M <m4gicks@gmail.com> wrote:

function f() end

tostring(f()) --what happens here?

This code causes an error, which I think is not obvious, with the message "bad argument #1 to 'tostring' (value expected)" I believe this is because the number of values returned by f is 0 which means the vararg passed into tostring has length 0.

Even stranger: this works:

tostring( ( f() ) )

The extra parentheses adjust the number of return values of 'f' to be 1, introducing a nil value. 

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Gé