-- Unicode comment: 你好世界 🌍🚀

-- Unicode string literals
local unicode = "こんにちは世界"
print(unicode)

-- Null byte in string
local null_str = "hello\0world"
print("Null-str length: " .. #null_str)

-- Deeply nested tables
local deep = {
    a = {
        b = {
            c = {
                d = {
                    e = "deep"
                }
            }
        }
    }
}
print(deep.a.b.c.d.e)

-- Very long string
local long_str = string.rep("x", 10000)
print("Long string length: " .. #long_str)

-- Metatable chains
local a = {}
local b = {}
local c = {}
setmetatable(a, {__index = b})
setmetatable(b, {__index = c})
c.value = 42
print("Metatable chain: " .. a.value)

-- Deep function nesting
local function level1()
    return function()
        return function()
            return function()
                return function()
                    return 42
                end
            end
        end
    end
end
print("Deep functions: " .. level1()()()()())

-- Coroutine with deep stack
local co = coroutine.create(function()
    local function recurse(n)
        if n == 0 then
            coroutine.yield("done")
        else
            return recurse(n - 1)
        end
    end
    recurse(100)
end)
local _, msg = coroutine.resume(co)
print("Coroutine: " .. msg)