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local util = require 'utility'
local files = require 'files'
local globalNode = require 'vm.global-node'
---@class vm.state
local m = {}
---@type table<uri, parser.object[]>
m.literals = util.multiTable(2)
---@type table<parser.object, table<parser.object, boolean>>
m.literalSubs = util.multiTable(2, function ()
return setmetatable({}, util.MODE_K)
end)
---@type table<parser.object, boolean>
m.allLiterals = {}
---@param uri uri
---@param source parser.object
function m.declareLiteral(uri, source)
if m.allLiterals[source] then
return
end
m.allLiterals[source] = true
local literals = m.literals[uri]
literals[#literals+1] = source
end
---@param source parser.object
---@param node vm.node
function m.subscribeLiteral(source, node)
if not node then
return
end
if node.type == 'union'
or node.type == 'cross' then
node:subscribeLiteral(source)
return
end
if not m.allLiterals[source] then
return
end
m.literalSubs[node][source] = true
end
---@param uri uri
function m.dropUri(uri)
local literals = m.literals[uri]
m.literals[uri] = nil
for _, literal in ipairs(literals) do
m.allLiterals[literal] = nil
local literalSubs = m.literalSubs[literal]
m.literalSubs[literal] = nil
for source in pairs(literalSubs) do
source._node = nil
end
end
end
for uri in files.eachFile() do
local state = files.getState(uri)
if state then
globalNode.compileAst(state.ast)
end
end
files.watch(function (ev, uri)
if ev == 'update' then
local state = files.getState(uri)
if state then
globalNode.compileAst(state.ast)
end
end
if ev == 'remove' then
m.dropUri(uri)
globalNode.dropUri(uri)
end
end)
return m
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