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local util = require 'utility'
local guide = require 'parser.guide'
---@class parser.object
---@field _localID string
---@field _localIDs table<string, parser.object[]>
---@class vm.local-id
local m = {}
m.ID_SPLITE = '\x1F'
local compileMap = util.switch()
: case 'local'
: call(function (source)
source._localID = ('%d'):format(source.start)
if not source.ref then
return
end
for _, ref in ipairs(source.ref) do
m.compileLocalID(ref)
end
end)
: case 'getlocal'
: call(function (source)
source._localID = ('%d'):format(source.node.start)
m.compileLocalID(source.next)
end)
: case 'getfield'
: case 'setfield'
: call(function (source)
local parentID = source.node._localID
if not parentID then
return
end
source._localID = parentID .. m.ID_SPLITE .. guide.getKeyName(source)
source.field._localID = source._localID
if source.type == 'getfield' then
m.compileLocalID(source.next)
end
end)
: case 'getmethod'
: case 'setmethod'
: call(function (source)
local parentID = source.node._localID
if not parentID then
return
end
source._localID = parentID .. m.ID_SPLITE .. guide.getKeyName(source)
source.method._localID = source._localID
if source.type == 'getmethod' then
m.compileLocalID(source.next)
end
end)
: case 'getindex'
: case 'setindex'
: call(function (source)
local parentID = source.node._localID
if not parentID then
return
end
local key = guide.getKeyName(source)
if not type(key) ~= 'string' then
return
end
source._localID = parentID .. m.ID_SPLITE .. key
source.index._localID = source._localID
if source.type == 'setindex' then
m.compileLocalID(source.next)
end
end)
: getMap()
local leftMap = util.switch()
: case 'field'
: case 'method'
: call(function (source)
return m.getLocal(source.parent)
end)
: case 'getfield'
: case 'setfield'
: case 'getmethod'
: case 'setmethod'
: case 'getindex'
: case 'setindex'
: call(function (source)
return m.getLocal(source.node)
end)
: case 'getlocal'
: call(function (source)
return source.node
end)
: case 'local'
: call(function (source)
return source
end)
: getMap()
---@param source parser.object
---@return parser.object?
function m.getLocal(source)
local getLeft = leftMap[source.type]
if getLeft then
return getLeft(source)
end
return nil
end
function m.compileLocalID(source)
if not source then
return
end
source._localID = false
local compiler = compileMap[source.type]
if not compiler then
return
end
compiler(source)
local root = guide.getRoot(source)
if not root._localIDs then
root._localIDs = util.multiTable(2)
end
local sources = root._localIDs[source._localID]
sources[#sources+1] = source
end
---@param source parser.object
---@return string|boolean
function m.getID(source)
if source._localID ~= nil then
return source._localID
end
source._localID = false
local loc = m.getLocal(source)
if not loc then
return source._localID
end
m.compileLocalID(loc)
return source._localID
end
---@param source parser.object
---@param key? string
---@return parser.object[]?
function m.getSources(source, key)
local id = m.getID(source)
if not id then
return nil
end
local root = guide.getRoot(source)
if not root._localIDs then
return nil
end
if key then
if type(key) ~= 'string' then
return nil
end
id = id .. m.ID_SPLITE .. key
end
return root._localIDs[id]
end
return m
|
