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local vm = require 'vm.vm'
local guide = require 'parser.guide'
local library = require 'library'
local await = require 'await'
local function eachFieldInLibrary(source, lib, results)
if not lib or not lib.child then
return
end
for _, value in pairs(lib.child) do
if value.name:sub(1, 1) ~= '@' then
results[#results+1] = value
end
end
end
local function eachFieldOfLibrary(results)
for _, lib in pairs(library.global) do
results[#results+1] = lib
end
end
local function eachField(source)
local unlock = vm.lock('eachField', source)
if not unlock then
return
end
while source.type == 'paren' do
source = source.exp
if not source then
return
end
end
await.delay()
local results = guide.requestFields(source, vm.interface)
if source.special == '_G' then
eachFieldOfLibrary(results)
end
if library.object[source.type] then
eachFieldInLibrary(source, library.object[source.type], results)
end
unlock()
return results
end
function vm.getFields(source)
if guide.isGlobal(source) then
local name = guide.getKeyName(source)
local cache = vm.getCache('eachFieldOfGlobal')[name]
or vm.getCache('eachField')[source]
or eachField(source)
vm.getCache('eachFieldOfGlobal')[name] = cache
return cache
else
local cache = vm.getCache('eachField')[source]
or eachField(source)
vm.getCache('eachField')[source] = cache
return cache
end
end
function vm.eachField(source, callback)
local results = vm.getFields(source)
if not results then
return
end
for i = 1, #results do
callback(results[i])
end
end
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