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local files = require 'files'
local guide = require 'parser.guide'
local vm = require 'vm'
local lang = require 'language'
return function (uri, callback)
local state = files.getState(uri)
if not state then
return
end
guide.eachSourceType(state.ast, 'getlocal', function (src)
local checkNil
local nxt = src.next
if nxt then
if nxt.type == 'getfield'
or nxt.type == 'getmethod'
or nxt.type == 'getindex'
or nxt.type == 'call' then
checkNil = true
end
end
local call = src.parent
if call and call.type == 'call' and call.node == src then
checkNil = true
end
if not checkNil then
return
end
local node = vm.compileNode(src)
if node:hasFalsy() then
callback {
start = src.start,
finish = src.finish,
message = lang.script('DIAG_NEED_CHECK_NIL'),
}
end
end)
end
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