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return function (source)
local value = source:bindValue()
local func = value:getFunction()
local declarat
if func then
declarat = func.source.name
else
declarat = source
end
if not declarat then
return source:getName() or ''
end
local key
if declarat:get 'simple' then
local simple = declarat:get 'simple'
local chars = {}
for i, obj in ipairs(simple) do
if obj.type == 'name' then
chars[i] = obj[1]
elseif obj.type == 'index' then
chars[i] = '[?]'
elseif obj.type == 'call' then
chars[i] = '(?)'
elseif obj.type == ':' then
chars[i] = ':'
elseif obj.type == '.' then
chars[i] = '.'
else
chars[i] = '*' .. obj.type
end
if obj == declarat then
break
end
end
key = table.concat(chars)
elseif declarat.type == 'name' then
key = declarat[1]
elseif declarat.type == 'string' then
key = ('%q'):format(declarat[1])
elseif declarat.type == 'number' or declarat.type == 'boolean' then
key = tostring(declarat[1])
elseif declarat.type == 'simple' then
local chars = {}
for i, obj in ipairs(declarat) do
if obj.type == 'name' then
chars[i] = obj[1]
elseif obj.type == 'index' then
chars[i] = '[?]'
elseif obj.type == 'call' then
chars[i] = '(?)'
elseif obj.type == ':' then
chars[i] = ':'
elseif obj.type == '.' then
chars[i] = '.'
else
chars[i] = '*' .. obj.type
end
end
-- 这里有个特殊处理
-- function mt:func() 以 mt.func 的形式调用时
-- hover 显示为 mt.func(self)
if chars[#chars-1] == ':' then
if not source:get 'object' then
chars[#chars-1] = '.'
end
elseif chars[#chars-1] == '.' then
if source:get 'object' then
chars[#chars-1] = ':'
end
end
key = table.concat(chars)
else
key = ''
end
return key
end
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