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local guide = require 'parser.guide'
local config = require 'config'
local type = type
local setmetatable = setmetatable
local ipairs = ipairs
_ENV = nil
---@class engineer
local mt = {}
mt.__index = mt
mt.type = 'engineer'
mt['local'] = function (self, source, mode, callback)
if mode == 'def' then
if source.tag ~= 'self' then
callback(source, 'local')
end
if source.ref then
for _, ref in ipairs(source.ref) do
if ref.type == 'setlocal' then
callback(ref, 'set')
end
end
end
if source.tag == 'self' then
local method = source.method
local node = method.node
self:search(node, node.type, mode, callback)
end
elseif mode == 'ref' then
if source.tag ~= 'self' then
callback(source, 'local')
end
if source.ref then
for _, ref in ipairs(source.ref) do
if ref.type == 'setlocal' then
callback(ref, 'set')
elseif ref.type == 'getlocal' then
callback(ref, 'get')
end
end
end
if source.tag == 'self' then
local method = source.method
local node = method.node
self:search(node, node.type, mode, callback)
end
elseif mode == 'field' then
if source.ref then
for _, ref in ipairs(source.ref) do
if ref.type == 'getlocal' then
local parent = ref.parent
if parent.type == 'setfield' then
callback(parent)
elseif parent.type == 'getfield' then
callback(parent)
end
end
end
end
end
end
mt['getlocal'] = function (self, source, mode, callback)
self:search(source.loc, 'local', mode, callback)
end
mt['setlocal'] = mt['getlocal']
mt['_G'] = function (self, source, mode, callback)
if mode == 'def' then
local parent = source.parent
if parent.type == 'setfield' then
callback(parent, 'set')
elseif parent.type == 'getfield' then
self:search(parent, 'special', mode, callback)
elseif parent.type == 'callargs' then
self:search(parent.parent, 'special', mode, callback)
end
elseif mode == 'ref' then
local parent = source.parent
if parent.type == 'setfield' then
callback(parent, 'set')
elseif parent.type == 'getfield' then
callback(parent, 'get')
elseif parent.type == 'getfield' then
self:search(parent, 'special', mode, callback)
elseif parent.type == 'callargs' then
self:search(parent.parent, 'special', mode, callback)
end
end
end
mt['getglobal'] = function (self, source, mode, callback)
local env = source.node
if mode == 'def' then
if env.ref then
for _, ref in ipairs(env.ref) do
if ref.type == 'setglobal' then
callback(ref, 'set')
elseif ref.type == 'getglobal' then
self:search(ref, 'special', mode, callback)
elseif ref.type == 'getlocal' then
self:search(ref, '_G', mode, callback)
end
end
end
elseif mode == 'ref' then
if env.ref then
for _, ref in ipairs(env.ref) do
if ref.type == 'setglobal' then
callback(ref, 'set')
elseif ref.type == 'getglobal' then
callback(ref, 'get')
elseif ref.type == 'getglobal' then
self:search(ref, 'special', mode, callback)
elseif ref.type == 'getlocal' then
self:search(ref, '_G', mode, callback)
end
end
end
elseif mode == 'field' then
self:search(source, 'getglobal', 'ref', function (src)
local parent = src.parent
if parent.type == 'setfield' then
callback(parent)
elseif parent.type == 'getfield' then
callback(parent)
end
end)
end
end
mt['setglobal'] = mt['getglobal']
mt['field'] = function (self, source, mode, callback)
local node = source.node
local key = guide.getKeyName(source)
self:eachRef(node, 'field', function (src)
if key == guide.getKeyName(src) then
if mode == 'def' then
if src.type == 'setfield' then
callback(src.field, 'set')
end
end
end
end)
end
mt['special'] = function (self, source, mode, callback)
local name = self:getSpecial(source)
if not name then
return
end
if mode == 'def' then
if name == '_G' then
self:search(source, '_G', mode, callback)
elseif name == 'rawset' then
callback(source.parent, 'set')
end
end
end
function mt:getSpecial(source)
local node = source.node
if node.tag ~= '_ENV' then
return nil
end
local name = guide.getKeyName(source)
return name
end
function mt:search(source, method, mode, callback)
local f = mt[method]
if not f then
return
end
f(self, source, mode, callback)
end
function mt:eachRef(source, mode, callback)
local tp = source.type
self:search(source, tp, mode, callback)
end
return function (ast)
local self = setmetatable({
step = 0,
ast = ast.ast,
}, mt)
if not ast.vm then
ast.vm = {}
end
return self
end
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