TEST [[
---@type fun():number
local function f()
    return 1, <!true!>
end
]]

TEST [[
---@return number, number?
function F()
    return 1, 1, <!1!>
end
]]

TEST [[
---@return number, number?
function F()
    return 1, 1, <!1!>, <!2!>, <!3!>
end
]]

TEST [[
---@meta

---@return number, number
local function r2() end

---@return number, number?
function F()
    return 1, <!r2()!>
end
]]