#1166 validate config

[kyazdani42]

@alex-courtis there are a few edge cases that were not covered
somehow #1194 but i cannot reproduce
and when an option can have different types (such a view.width/view.height)

[alex-courtis]

somehow #1194 but i cannot reproduce

That's a use case I did not account for: value table with defaults, rather than empty.

I'll think about options. Perhaps the ignore list is still a good idea.

[alex-courtis]

and when an option can have different types (such a view.width/view.height)

I'm not sure that is a good idea, however we can work with it.

[alex-courtis]

Let's try this again:

• functions are allowed as values; I have added a warning to the doc
• integer indexed tables are not checked, as they are not strongly typed and have variable length contents

[alex-courtis]

Tested:

• empty options
• default options
• my setup
• Unknow option warning #1194
• function as per #1166 validate user's options #1177 (comment)

[kyazdani42]

let see if this works 😄