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---@class vm
local vm = require 'vm.vm'
local guide = require 'parser.guide'
---@param object vm.object
---@return string?
local function getNodeName(object)
if object.type == 'global' and object.cate == 'type' then
return object.name
end
if object.type == 'nil'
or object.type == 'boolean'
or object.type == 'number'
or object.type == 'string'
or object.type == 'table'
or object.type == 'function'
or object.type == 'integer' then
return object.type
end
if object.type == 'doc.type.boolean' then
return 'boolean'
end
if object.type == 'doc.type.integer' then
return 'integer'
end
if object.type == 'doc.type.function' then
return 'function'
end
if object.type == 'doc.type.table' then
return 'table'
end
if object.type == 'doc.type.array' then
return 'table'
end
return nil
end
---@param uri uri
---@param child vm.node|string|vm.object
---@param parent vm.node|string|vm.object
---@param mark? table
---@return boolean
function vm.isSubType(uri, child, parent, mark)
mark = mark or {}
if type(child) == 'string' then
child = vm.getGlobal('type', child)
if not child then
return false
end
elseif child.type == 'vm.node' then
for n in child:eachObject() do
if getNodeName(n) and not vm.isSubType(uri, n, parent, mark) then
return false
end
end
return true
end
if type(parent) == 'string' then
parent = vm.getGlobal('type', parent)
if not parent then
return false
end
elseif parent.type == 'vm.node' then
for n in parent:eachObject() do
if getNodeName(n) and vm.isSubType(uri, child, n, mark) then
return true
end
end
if parent:isOptional() then
if vm.isSubType(uri, child, 'nil', mark) then
return true
end
end
return false
end
local childName = getNodeName(child)
local parentName = getNodeName(parent)
if childName == 'any'
or parentName == 'any' then
return true
end
if childName == parentName then
return true
end
-- TODO: check duck
if parentName == 'table' and not guide.isBasicType(childName) then
return true
end
if childName == 'table' and not guide.isBasicType(parentName) then
return true
end
-- check class parent
if not mark[child] then
mark[child] = true
if child.type == 'global' and child.cate == 'type' then
for _, set in ipairs(child:getSets(uri)) do
if set.type == 'doc.class' and set.extends then
for _, ext in ipairs(set.extends) do
if ext.type == 'doc.extends.name'
and vm.isSubType(uri, ext[1], parent, mark) then
return true
end
end
end
end
end
end
return false
end
---@param uri uri
---@param tnode vm.node
---@param knode vm.node
---@return vm.node?
function vm.getTableValue(uri, tnode, knode)
local result = vm.createNode()
for tn in tnode:eachObject() do
if tn.type == 'doc.type.table' then
for _, field in ipairs(tn.fields) do
if vm.isSubType(uri, vm.compileNode(field.name), knode) then
if field.extends then
result:merge(vm.compileNode(field.extends))
end
end
end
end
if tn.type == 'doc.type.array' then
result:merge(vm.compileNode(tn.node))
end
if tn.type == 'table' then
for _, field in ipairs(tn) do
if field.type == 'tableindex' then
if field.value then
result:merge(vm.compileNode(field.value))
end
end
if field.type == 'tablefield' then
if vm.isSubType(uri, knode, 'string') then
if field.value then
result:merge(vm.compileNode(field.value))
end
end
end
if field.type == 'tableexp' then
if vm.isSubType(uri, knode, 'integer') and field.tindex == 1 then
if field.value then
result:merge(vm.compileNode(field.value))
end
end
end
end
end
end
if result:isEmpty() then
return nil
end
return result
end
---@param uri uri
---@param tnode vm.node
---@param vnode vm.node
---@return vm.node?
function vm.getTableKey(uri, tnode, vnode)
local result = vm.createNode()
for tn in tnode:eachObject() do
if tn.type == 'doc.type.table' then
for _, field in ipairs(tn.fields) do
if field.extends then
if vm.isSubType(uri, vm.compileNode(field.extends), vnode) then
result:merge(vm.compileNode(field.name))
end
end
end
end
if tn.type == 'doc.type.array' then
result:merge(vm.declareGlobal('type', 'integer'))
end
if tn.type == 'table' then
for _, field in ipairs(tn) do
if field.type == 'tableindex' then
if field.index then
result:merge(vm.compileNode(field.index))
end
end
if field.type == 'tablefield' then
result:merge(vm.declareGlobal('type', 'string'))
end
if field.type == 'tableexp' then
result:merge(vm.declareGlobal('type', 'integer'))
end
end
end
end
if result:isEmpty() then
return nil
end
return result
end
---@param uri uri
---@param defNode vm.node
---@param refNode vm.node
---@return boolean
function vm.canCastType(uri, defNode, refNode)
local defInfer = vm.getInfer(defNode)
local refInfer = vm.getInfer(refNode)
if defInfer:hasUnknown(uri) then
return true
end
if refInfer:hasUnknown(uri) then
return true
end
-- allow `local x = {};x = nil`,
-- but not allow `local x ---@type table;x = nil`
local allowNil = defInfer:hasType(uri, 'table')
and not defNode:hasType 'table'
-- allow `local x = 0;x = 1.0`,
-- but not allow `local x ---@type integer;x = 1.0`
local allowNumber = defInfer:hasType(uri, 'integer')
and not defNode:hasType 'integer'
if allowNil and vm.isSubType(uri, refNode, 'nil') then
return true
end
if allowNumber and vm.isSubType(uri, refNode, 'number') then
return true
end
if vm.isSubType(uri, refNode, defNode) then
return true
end
return false
end
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