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local files = require 'files'
---@class vm
local vm = require 'vm.vm'
local ws = require 'workspace.workspace'
---@type table<vm.object, vm.node>
vm.nodeCache = {}
---@class vm.node
local mt = {}
mt.__index = mt
mt.type = 'vm.node'
mt.optional = nil
mt.lastInfer = nil
mt.data = nil
---@param node vm.node | vm.object
function mt:merge(node)
if not node then
return
end
if node.type == 'vm.node' then
if node == self then
return
end
if node:isOptional() then
self.optional = true
end
for _, obj in ipairs(node) do
if not self[obj] then
self[obj] = true
self[#self+1] = obj
end
end
else
if not self[node] then
self[node] = true
self[#self+1] = node
end
end
end
---@return boolean
function mt:isEmpty()
return #self == 0
end
---@param n integer
---@return vm.object?
function mt:get(n)
return self[n]
end
function mt:setData(k, v)
if not self.data then
self.data = {}
end
self.data[k] = v
end
function mt:getData(k)
if not self.data then
return nil
end
return self.data[k]
end
function mt:addOptional()
self.optional = true
end
function mt:removeOptional()
self.optional = false
end
---@return boolean
function mt:isOptional()
return self.optional == true
end
---@return boolean
function mt:isFalsy()
if self.optional then
return true
end
for _, c in ipairs(self) do
if c.type == 'nil'
or (c.type == 'boolean' and c[1] == false)
or (c.type == 'doc.type.boolean' and c[1] == false) then
return true
end
end
return false
end
---@return fun():vm.object
function mt:eachObject()
local i = 0
return function ()
i = i + 1
return self[i]
end
end
---@return vm.node
function mt:copy()
return vm.createNode(self)
end
---@param source parser.object | vm.generic
---@param node vm.node | vm.object
---@param cover? boolean
function vm.setNode(source, node, cover)
if not node then
error('Can not set nil node')
end
if source.type == 'global' then
error('Can not set node to global')
end
if cover then
vm.nodeCache[source] = node
return
end
local me = vm.nodeCache[source]
if me then
me:merge(node)
else
if node.type == 'vm.node' then
vm.nodeCache[source] = node
else
vm.nodeCache[source] = vm.createNode(node)
end
end
end
---@return vm.node?
function vm.getNode(source)
return vm.nodeCache[source]
end
---@param source vm.object
function vm.removeNode(source)
vm.nodeCache[source] = nil
end
local lockCount = 0
local needClearCache = false
function vm.lockCache()
lockCount = lockCount + 1
end
function vm.unlockCache()
lockCount = lockCount - 1
if needClearCache then
needClearCache = false
vm.clearNodeCache()
end
end
function vm.clearNodeCache()
if lockCount > 0 then
needClearCache = true
return
end
log.debug('clearNodeCache')
vm.nodeCache = {}
end
---@param a? vm.node | vm.object
---@param b? vm.node | vm.object
---@return vm.node
function vm.createNode(a, b)
local node = setmetatable({}, mt)
if a then
node:merge(a)
end
if b then
node:merge(b)
end
return node
end
files.watch(function (ev, uri)
if ev == 'version' then
if ws.isReady(uri) then
vm.clearNodeCache()
end
end
end)
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