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local util = require 'utility'
local guide = require 'parser.guide'
---@class vm.local-node
local m = {}
---@type table<uri, parser.object[]>
m.locals = util.multiTable(2)
---@type table<parser.object, table<parser.object, boolean>>
m.localSubs = util.multiTable(2, function ()
return setmetatable({}, util.MODE_K)
end)
---@type table<parser.object, boolean>
m.allLocals = {}
---@param source parser.object
function m.declareLocal(source)
if m.allLocals[source] then
return
end
m.allLocals[source] = true
local uri = guide.getUri(source)
local locals = m.locals[uri]
locals[#locals+1] = source
end
---@param source parser.object
---@param node vm.node
function m.subscribeLocal(source, node)
-- TODO: need delete
if not node then
return
end
if node.type == 'vm.node' then
node:subscribeLocal(source)
return
end
if not m.allLocals[node] then
return
end
m.localSubs[node][source] = true
end
---@param uri uri
function m.dropUri(uri)
local locals = m.locals[uri]
m.locals[uri] = nil
for _, loc in ipairs(locals) do
m.allLocals[loc] = nil
local localSubs = m.localSubs[loc]
m.localSubs[loc] = nil
for source in pairs(localSubs) do
source._node = nil
end
end
end
return m
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