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return function (source, caller)
if not source then
return ''
end
local key
if source:get 'simple' then
local simple = source: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 == source then
break
end
end
key = table.concat(chars)
elseif source.type == 'name' then
key = source[1]
elseif source.type == 'string' then
key = ('%q'):format(source[1])
elseif source.type == 'number' or source.type == 'boolean' then
key = tostring(source[1])
elseif source.type == 'simple' then
local chars = {}
for i, obj in ipairs(source) 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 caller then
if chars[#chars-1] == ':' then
if not caller:get 'object' then
chars[#chars-1] = '.'
end
elseif chars[#chars-1] == '.' then
if caller:get 'object' then
chars[#chars-1] = ':'
end
end
end
key = table.concat(chars)
else
key = ''
end
return key
end
|
