Yet another basic lua query

[Spannerbag]

Hi,
getting lost in the API.

I have this code (which works fine):

Code: Select all

function wesnoth.wml_conditionals.ret_check(cfg)
  local unit = wesnoth.units.find_on_map(cfg)[1]
  local attm = 0				-- Total melee attacks
  local attr = 0				-- Total ranged attacks

  if not unit then return false end		-- No filter match

  for i=1,#unit.attacks do
    if unit.attacks[i].range=="melee" and unit.attacks[i].name ~= "slam" and not string.match(unit.attacks[i].name, "^petrifyturn") then attm = attm +1 end
    if unit.attacks[i].range=="ranged" then attr = attr +1 end
  end
...

I'd like to also exclude a melee attack with a custom special:

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[dummy_stunmove]
  id=stunmove
  name= _ "stunmove"
  female_name= _ "female^stunmove"
...

However this special might not be the only attack special, so is there an elegant way to trap this and exclude it same way as "slam" and "petrifyturn"(s)?

Can't use attack name as this special is appended to an existing attack and not all units with this attack will have this custom special.
I'm thinking something like and not unit.attacks[i].specials.dummy_stunmove.id (assuming nonexistent value=false) but really not sure of syntax here.
Would some sort of weapon filter be a better way to go?
Originally I'd thought there'd only be the one exclusion ("slam") but there are a few now...

Any help gratefully received!

Cheers!

[Celtic_Minstrel]

I'm thinking something like and not unit.attacks[i].specials.dummy_stunmove.id (assuming nonexistent value=false) but really not sure of syntax here.

That won't work (the specials are exposed to the Lua API, but as an array, not a mapping).

I think something like this should work:

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if unit.attacks[i]:matches{special_type = 'dummy_stunmove'} then

or

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if unit.attacks[i]:matches{special_id = 'stunmove'} then

You could search unit.attacks[i].specials for a match, but I think using matches would be easier.

[Spannerbag]

Wow, very helpful, thanks.

So where I now have:

Code: Select all

if unit.attacks[i].range=="melee"
 and unit.attacks[i].name ~= "slam"
 and not string.match(unit.attacks[i].name, "^petrifyturn")
 then attm = attm +1 end

I just append something like:
unit.attacks[i]:matches{special_id = 'stunmove'}

So new statement is:

Code: Select all

if unit.attacks[i].range=="melee"
 and unit.attacks[i].name ~= "slam"
 and not string.match(unit.attacks[i].name, "^petrifyturn")
 and not unit.attacks[i]:matches{special_id = 'stunmove'}            # Exclude "stunmove" WS
 then attm = attm +1 end

Many thanks again for your assistance, saved me ages of thrashing around!
Very much appreciated.
Cheers!