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local findResult = require 'matcher.find_result'
local parser = require 'parser'
local function tryMeta(var)
local keys = {}
repeat
if var.childs.meta then
local metavar = var.childs.meta
for i = #keys, 1, -1 do
local key = keys[i]
metavar = metavar.childs[key]
if not metavar then
return nil
end
end
return metavar
end
keys[#keys+1] = var.key
var = var.parent
until not var
return nil
end
local function parseResult(result, newName)
local positions = {}
local tp = result.type
if tp == 'var' then
local var = result.var
local key = result.info.source[1]
if var.disableRename and key == 'self' then
return positions
end
if result.info.source.index then
if not parser.grammar(newName, 'Exp') then
return positions
end
else
if not parser.grammar(newName, 'Name') then
return positions
end
end
for _, info in ipairs(var) do
if info.source[1] == key then
positions[#positions+1] = {info.source.start, info.source.finish}
end
end
local metavar = tryMeta(var)
if metavar then
for _, info in ipairs(metavar) do
if info.source[1] == key then
positions[#positions+1] = {info.source.start, info.source.finish}
end
end
end
elseif tp == 'label' then
local label = result.label
for _, info in ipairs(label) do
positions[#positions+1] = {info.source.start, info.source.finish}
end
else
error('Unknow result type:' .. result.type)
end
return positions
end
return function (results, pos, newName)
local result = findResult(results, pos)
if not result then
return nil
end
local positions = parseResult(result, newName)
return positions
end
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