-- This module processes data for [[Module:IPAc-en]]. It is intended to be -- loaded with mw.loadData.  local PRONUNCIATION_MODULE = 'Module:IPAc-en/pronunciation' local PHONEME_MODULE = 'Module:IPAc-en/phonemes'  local function makeData(oldData)  local newData = {}  for i, old in ipairs(oldData) do  local new = {}  for k, v in pairs(old) do  if k ~= 'aliases' and k ~= 'code' then  new[k] = v  end  end  newData[old.code] = new  if old.aliases then  for i, alias in ipairs(old.aliases) do  newData[alias] = new  end  end  end  return newData end  local function main()  local pronunciation = makeData(require(PRONUNCIATION_MODULE))  local phonemes = makeData(require(PHONEME_MODULE))   -- Check that no pronunciation keys are also contained in the phonemes  -- data. This would cause silent, hard-to-debug errors if it went  -- unchecked, so make it cause a big red error message instead.  for id in pairs(pronunciation) do  if phonemes[id] then  error(string.format(  "duplicate ID '%s' found in %s and %s",  id,  PRONUNCIATION_MODULE,  PHONEME_MODULE  ))  end  end   return {  pronunciation = pronunciation,  phonemes = phonemes,  } end  return main()