parse ---@return ... a ---@return ... unknown

Author: sumneko

script/parser/luadoc.lua

@@ -452,6 +452,10 @@ local function  parseTypeUnitFunction(parent)
                     name = returnName
                     return true
                 end
+                if returnName[1] == '...' then
+                    name = returnName
+                    return false
+                end
                 return false
             end)
             local rtn = parseType(typeUnit)
@@ -648,13 +652,16 @@ function parseTypeUnit(parent)
                 or parseCode(parent)
                 or parseInteger(parent)
                 or parseBoolean(parent)
-                or parseDots('doc.type.name', parent)
                 or parseParen(parent)
     if not result then
         result = parseName('doc.type.name', parent)
+              or parseDots('doc.type.name', parent)
         if not result then
             return nil
         end
+        if result[1] == '...' then
+            result[1] = 'unknown'
+        end
     end
     while true do
         local newResult = parseTypeUnitSign(parent, result)
@@ -918,6 +925,10 @@ local docSwitch = util.switch()
             returns = {},
         }
         while true do
+            local dots = parseDots('doc.return.name')
+            if dots then
+                Ci = Ci - 1
+            end
             local docType = parseType(result)
             if not docType then
                 break
@@ -929,7 +940,8 @@ local docSwitch = util.switch()
                 nextToken()
                 docType.optional = true
             end
-            docType.name = parseName('doc.return.name', docType)
+            docType.name = dots
+                        or parseName('doc.return.name', docType)
                         or parseDots('doc.return.name', docType)
             result.returns[#result.returns+1] = docType
             if not checkToken('symbol', ',', 1) then

script/vm/compiler.lua

@@ -1553,10 +1553,6 @@ local compilerSwitch = util.switch()
             end
             if  lastReturn
             and not hasMarkDoc then
-                if lastReturn.types[1][1] == '...' then
-                    hasMarkDoc = true
-                    vm.setNode(source, vm.declareGlobal('type', 'unknown'))
-                end
                 if lastReturn.name and lastReturn.name[1] == '...' then
                     hasMarkDoc = true
                     vm.setNode(source, vm.compileNode(lastReturn))
@@ -1618,13 +1614,6 @@ local compilerSwitch = util.switch()
             if not node then
                 return
             end
-            for n in node:eachObject() do
-                if  n.type == 'global'
-                and n.cate == 'type'
-                and n.name == '...' then
-                    return
-                end
-            end
             vm.setNode(source, node)
         end
         if vararg.type == 'varargs' then
@@ -1643,13 +1632,6 @@ local compilerSwitch = util.switch()
         if not node then
             return
         end
-        for n in node:eachObject() do
-            if  n.type == 'global'
-            and n.cate == 'type'
-            and n.name == '...' then
-                return
-            end
-        end
         vm.setNode(source, node)
     end)
     : case 'doc.type'

script/vm/function.lua

@@ -98,16 +98,14 @@ function vm.countReturnsOfFunction(func, mark)
                         n = n + 1
                         lastReturn = ret
                         dmax = n
-                        if not vm.compileNode(ret):isNullable() then
+                        if  (not ret.name or ret.name[1] ~= '...')
+                        and not vm.compileNode(ret):isNullable() then
                             dmin = n
                         end
                     end
                 end
             end
             if lastReturn then
-                if lastReturn.types[1][1] == '...' then
-                    dmax = math.huge
-                end
                 if lastReturn.name and lastReturn.name[1] == '...' then
                     dmax = math.huge
                 end

test/hover/init.lua

@@ -2041,6 +2041,16 @@ function f(...boolean)
   -> ...number
 ]]
 
+TEST [[
+---@param ... boolean
+---@return ...
+local function <?f?>(...) end
+]]
+[[
+function f(...boolean)
+  -> ...unknown
+]]
+
 TEST [[
 ---@type fun():x: number
 local <?f?>

test/type_inference/init.lua

@@ -515,7 +515,7 @@ TEST 'fun(a: string, b: any, ...any)' [[
 local <?x?>
 ]]
 
-TEST 'fun(a: string, b: any, c?: boolean, ...any):c, d?, ...' [[
+TEST 'fun(a: string, b: any, c?: boolean, ...any):c, d?, ...unknown' [[
 ---@type fun(a: string, b, c?: boolean, ...):c, d?, ...
 local <?x?>
 ]]