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 Go to latest Published: Sep 23, 2026 License: MIT Imports: 23 Imported by: 0

README

GopherLua: VM and compiler for Lua in Go.

PkgGoDev test Coverage Status

GopherLua is a Lua5.1(+ goto statement in Lua5.2) VM and compiler written in Go. GopherLua has a same goal with Lua: Be a scripting language with extensible semantics . It provides Go APIs that allow you to easily embed a scripting language to your Go host programs.

Table of Contents

Design principle

  • Be a scripting language with extensible semantics.
  • User-friendly Go API
    • The stack based API like the one used in the original Lua implementation will cause a performance improvements in GopherLua (It will reduce memory allocations and concrete type <-> interface conversions). GopherLua API is not the stack based API. GopherLua give preference to the user-friendliness over the performance.

How about performance?

GopherLua is not fast but not too slow, I think.

GopherLua has almost equivalent ( or little bit better ) performance as Python3 on micro benchmarks.

There are some benchmarks on the wiki page .

Installation

$ go get github.com/yuin/gopher-lua

Usage

GopherLua APIs perform in much the same way as Lua, but the stack is used only for passing arguments and receiving returned values.

GopherLua supports channel operations. See "Goroutines" section.

Import a package.

import (
    "github.com/yuin/gopher-lua"
)

Run scripts in the VM.

L := lua.NewState()
defer L.Close()
if err := L.DoString(`print("hello")`); err != nil {
    panic(err)
}

L := lua.NewState()
defer L.Close()
if err := L.DoFile("hello.lua"); err != nil {
    panic(err)
}

Refer to Lua Reference Manual and Go doc for further information.

Note that elements that are not commented in Go doc equivalent to Lua Reference Manual , except GopherLua uses objects instead of Lua stack indices.

Data model

All data in a GopherLua program is an LValue . LValue is an interface type that has following methods.

  • String() string
  • Type() LValueType

Objects implement an LValue interface are

Type name Go type Type() value Constants
LNilType (constants) LTNil LNil
LBool (constants) LTBool LTrue, LFalse
LNumber float64 LTNumber -
LString string LTString -
LFunction struct pointer LTFunction -
LUserData struct pointer LTUserData -
LState struct pointer LTThread -
LTable struct pointer LTTable -
LChannel chan LValue LTChannel -

You can test an object type in Go way(type assertion) or using a Type() value.

lv := L.Get(-1) // get the value at the top of the stack
if str, ok := lv.(lua.LString); ok {
    // lv is LString
    fmt.Println(string(str))
}
if lv.Type() != lua.LTString {
    panic("string required.")
}

lv := L.Get(-1) // get the value at the top of the stack
if tbl, ok := lv.(*lua.LTable); ok {
    // lv is LTable
    fmt.Println(L.ObjLen(tbl))
}

Note that LBool , LNumber , LString is not a pointer.

To test LNilType and LBool, You must use pre-defined constants.

lv := L.Get(-1) // get the value at the top of the stack

if lv == lua.LTrue { // correct
}

if bl, ok := lv.(lua.LBool); ok && bool(bl) { // wrong
}

In Lua, both nil and false make a condition false. LVIsFalse and LVAsBool implement this specification.

lv := L.Get(-1) // get the value at the top of the stack
if lua.LVIsFalse(lv) { // lv is nil or false
}

if lua.LVAsBool(lv) { // lv is neither nil nor false
}

Objects that based on go structs(LFunction. LUserData, LTable) have some public methods and fields. You can use these methods and fields for performance and debugging, but there are some limitations.

  • Metatable does not work.
  • No error handlings.
Callstack & Registry size

The size of an LState's callstack controls the maximum call depth for Lua functions within a script (Go function calls do not count).

The registry of an LState implements stack storage for calling functions (both Lua and Go functions) and also for temporary variables in expressions. Its storage requirements will increase with callstack usage and also with code complexity.

Both the registry and the callstack can be set to either a fixed size or to auto size.

When you have a large number of LStates instantiated in a process, it's worth taking the time to tune the registry and callstack options.

Registry

The registry can have an initial size, a maximum size and a step size configured on a per LState basis. This will allow the registry to grow as needed. It will not shrink again after growing.

L := lua.NewState(lua.Options{
   RegistrySize: 1024 * 20,         // this is the initial size of the registry
   RegistryMaxSize: 1024 * 80,      // this is the maximum size that the registry can grow to. If set to `0` (the default) then the registry will not auto grow
   RegistryGrowStep: 32,            // this is how much to step up the registry by each time it runs out of space. The default is `32`.
})
defer L.Close()

A registry which is too small for a given script will ultimately result in a panic. A registry which is too big will waste memory (which can be significant if many LStates are instantiated). Auto growing registries incur a small performance hit at the point they are resized but will not otherwise affect performance.

Callstack

The callstack can operate in two different modes, fixed or auto size. A fixed size callstack has the highest performance and has a fixed memory overhead. An auto sizing callstack will allocate and release callstack pages on demand which will ensure the minimum amount of memory is in use at any time. The downside is it will incur a small performance impact every time a new page of callframes is allocated. By default an LState will allocate and free callstack frames in pages of 8, so the allocation overhead is not incurred on every function call. It is very likely that the performance impact of an auto resizing callstack will be negligible for most use cases.

L := lua.NewState(lua.Options{
    CallStackSize: 120,                 // this is the maximum callstack size of this LState
    MinimizeStackMemory: true,          // Defaults to `false` if not specified. If set, the callstack will auto grow and shrink as needed up to a max of `CallStackSize`. If not set, the callstack will be fixed at `CallStackSize`.
})
defer L.Close()
Option defaults

The above examples show how to customize the callstack and registry size on a per LState basis. You can also adjust some defaults for when options are not specified by altering the values of lua.RegistrySize, lua.RegistryGrowStep and lua.CallStackSize.

An LState object that has been created by *LState#NewThread() inherits the callstack & registry size from the parent LState object.

Miscellaneous lua.NewState options
  • Options.SkipOpenLibs bool(default false)
    • By default, GopherLua opens all built-in libraries when new LState is created.
    • You can skip this behaviour by setting this to true .
    • Using the various OpenXXX(L *LState) int functions you can open only those libraries that you require, for an example see below.
  • Options.IncludeGoStackTrace bool(default false)
    • By default, GopherLua does not show Go stack traces when panics occur.
    • You can get Go stack traces by setting this to true .
API

Refer to Lua Reference Manual and Go doc(LState methods) for further information.

Calling Go from Lua
func Double(L *lua.LState) int {
    lv := L.ToInt(1)             /* get argument */
    L.Push(lua.LNumber(lv * 2)) /* push result */
    return 1                     /* number of results */
}

func main() {
    L := lua.NewState()
    defer L.Close()
    L.SetGlobal("double", L.NewFunction(Double)) /* Original lua_setglobal uses stack... */
}

print(double(20)) -- > "40"

Any function registered with GopherLua is a lua.LGFunction, defined in value.go

type LGFunction func(*LState) int

Working with coroutines.

co, _ := L.NewThread() /* create a new thread */
fn := L.GetGlobal("coro").(*lua.LFunction) /* get function from lua */
for {
    st, err, values := L.Resume(co, fn)
    if st == lua.ResumeError {
        fmt.Println("yield break(error)")
        fmt.Println(err.Error())
        break
    }

    for i, lv := range values {
        fmt.Printf("%v : %v\n", i, lv)
    }

    if st == lua.ResumeOK {
        fmt.Println("yield break(ok)")
        break
    }
}
Opening a subset of builtin modules

The following demonstrates how to open a subset of the built-in modules in Lua, say for example to avoid enabling modules with access to local files or system calls.

main.go

func main() {
    L := lua.NewState(lua.Options{SkipOpenLibs: true})
    defer L.Close()
    for _, pair := range []struct {
        n string
        f lua.LGFunction
    }{
        {lua.LoadLibName, lua.OpenPackage}, // Must be first
        {lua.BaseLibName, lua.OpenBase},
        {lua.TabLibName, lua.OpenTable},
    } {
        if err := L.CallByParam(lua.P{
            Fn:      L.NewFunction(pair.f),
            NRet:    0,
            Protect: true,
        }, lua.LString(pair.n)); err != nil {
            panic(err)
        }
    }
    if err := L.DoFile("main.lua"); err != nil {
        panic(err)
    }
}
Creating a module by Go

mymodule.go

package mymodule

import (
    "github.com/yuin/gopher-lua"
)

func Loader(L *lua.LState) int {
    // register functions to the table
    mod := L.SetFuncs(L.NewTable(), exports)
    // register other stuff
    L.SetField(mod, "name", lua.LString("value"))

    // returns the module
    L.Push(mod)
    return 1
}

var exports = map[string]lua.LGFunction{
    "myfunc": myfunc,
}

func myfunc(L *lua.LState) int {
    return 0
}

mymain.go

package main

import (
    "./mymodule"
    "github.com/yuin/gopher-lua"
)

func main() {
    L := lua.NewState()
    defer L.Close()
    L.PreloadModule("mymodule", mymodule.Loader)
    if err := L.DoFile("main.lua"); err != nil {
        panic(err)
    }
}

main.lua

local m = require("mymodule")
m.myfunc()
print(m.name)
Calling Lua from Go
L := lua.NewState()
defer L.Close()
if err := L.DoFile("double.lua"); err != nil {
    panic(err)
}
if err := L.CallByParam(lua.P{
    Fn: L.GetGlobal("double"),
    NRet: 1,
    Protect: true,
    }, lua.LNumber(10)); err != nil {
    panic(err)
}
ret := L.Get(-1) // returned value
L.Pop(1)  // remove received value

If Protect is false, GopherLua will panic instead of returning an error value.

User-Defined types

You can extend GopherLua with new types written in Go. LUserData is provided for this purpose.

type Person struct {
    Name string
}

const luaPersonTypeName = "person"

// Registers my person type to given L.
func registerPersonType(L *lua.LState) {
    mt := L.NewTypeMetatable(luaPersonTypeName)
    L.SetGlobal("person", mt)
    // static attributes
    L.SetField(mt, "new", L.NewFunction(newPerson))
    // methods
    L.SetField(mt, "__index", L.SetFuncs(L.NewTable(), personMethods))
}

// Constructor
func newPerson(L *lua.LState) int {
    person := &Person{L.CheckString(1)}
    ud := L.NewUserData()
    ud.Value = person
    L.SetMetatable(ud, L.GetTypeMetatable(luaPersonTypeName))
    L.Push(ud)
    return 1
}

// Checks whether the first lua argument is a *LUserData with *Person and returns this *Person.
func checkPerson(L *lua.LState) *Person {
    ud := L.CheckUserData(1)
    if v, ok := ud.Value.(*Person); ok {
        return v
    }
    L.ArgError(1, "person expected")
    return nil
}

var personMethods = map[string]lua.LGFunction{
    "name": personGetSetName,
}

// Getter and setter for the Person#Name
func personGetSetName(L *lua.LState) int {
    p := checkPerson(L)
    if L.GetTop() == 2 {
        p.Name = L.CheckString(2)
        return 0
    }
    L.Push(lua.LString(p.Name))
    return 1
}

func main() {
    L := lua.NewState()
    defer L.Close()
    registerPersonType(L)
    if err := L.DoString(`
        p = person.new("Steeve")
        print(p:name()) -- "Steeve"
        p:name("Alice")
        print(p:name()) -- "Alice"
    `); err != nil {
        panic(err)
    }
}
Terminating a running LState

GopherLua supports the Go Concurrency Patterns: Context .

L := lua.NewState()
defer L.Close()
ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
defer cancel()
// set the context to our LState
L.SetContext(ctx)
err := L.DoString(`
  local clock = os.clock
  function sleep(n)  -- seconds
    local t0 = clock()
    while clock() - t0 <= n do end
  end
  sleep(3)
`)
// err.Error() contains "context deadline exceeded"

With coroutines

L := lua.NewState()
defer L.Close()
ctx, cancel := context.WithCancel(context.Background())
L.SetContext(ctx)
defer cancel()
L.DoString(`
    function coro()
	  local i = 0
	  while true do
	    coroutine.yield(i)
		i = i+1
	  end
	  return i
    end
`)
co, cocancel := L.NewThread()
defer cocancel()
fn := L.GetGlobal("coro").(*LFunction)

_, err, values := L.Resume(co, fn) // err is nil

cancel() // cancel the parent context

_, err, values = L.Resume(co, fn) // err is NOT nil : child context was canceled

Note that using a context causes performance degradation.

time ./glua-with-context.exe fib.lua
9227465
0.01s user 0.11s system 1% cpu 7.505 total

time ./glua-without-context.exe fib.lua
9227465
0.01s user 0.01s system 0% cpu 5.306 total
Sharing Lua byte code between LStates

Calling DoFile will load a Lua script, compile it to byte code and run the byte code in a LState.

If you have multiple LStates which are all required to run the same script, you can share the byte code between them, which will save on memory. Sharing byte code is safe as it is read only and cannot be altered by lua scripts.

// CompileLua reads the passed lua file from disk and compiles it.
func CompileLua(filePath string) (*lua.FunctionProto, error) {
    file, err := os.Open(filePath)
    defer file.Close()
    if err != nil {
        return nil, err
    }
    reader := bufio.NewReader(file)
    chunk, err := parse.Parse(reader, filePath)
    if err != nil {
        return nil, err
    }
    proto, err := lua.Compile(chunk, filePath)
    if err != nil {
        return nil, err
    }
    return proto, nil
}

// DoCompiledFile takes a FunctionProto, as returned by CompileLua, and runs it in the LState. It is equivalent
// to calling DoFile on the LState with the original source file.
func DoCompiledFile(L *lua.LState, proto *lua.FunctionProto) error {
    lfunc := L.NewFunctionFromProto(proto)
    L.Push(lfunc)
    return L.PCall(0, lua.MultRet, nil)
}

// Example shows how to share the compiled byte code from a lua script between multiple VMs.
func Example() {
    codeToShare, err := CompileLua("mylua.lua")
    if err != nil {
        panic(err)
    }
    a := lua.NewState()
    b := lua.NewState()
    c := lua.NewState()
    DoCompiledFile(a, codeToShare)
    DoCompiledFile(b, codeToShare)
    DoCompiledFile(c, codeToShare)
}
Goroutines

The LState is not goroutine-safe. It is recommended to use one LState per goroutine and communicate between goroutines by using channels.

Channels are represented by channel objects in GopherLua. And a channel table provides functions for performing channel operations.

Some objects can not be sent over channels due to having non-goroutine-safe objects inside itself.

  • a thread(state)
  • a function
  • an userdata
  • a table with a metatable

You must not send these objects from Go APIs to channels.

func receiver(ch, quit chan lua.LValue) {
    L := lua.NewState()
    defer L.Close()
    L.SetGlobal("ch", lua.LChannel(ch))
    L.SetGlobal("quit", lua.LChannel(quit))
    if err := L.DoString(`
    local exit = false
    while not exit do
      channel.select(
        {"|<-", ch, function(ok, v)
          if not ok then
            print("channel closed")
            exit = true
          else
            print("received:", v)
          end
        end},
        {"|<-", quit, function(ok, v)
            print("quit")
            exit = true
        end}
      )
    end
  `); err != nil {
        panic(err)
    }
}

func sender(ch, quit chan lua.LValue) {
    L := lua.NewState()
    defer L.Close()
    L.SetGlobal("ch", lua.LChannel(ch))
    L.SetGlobal("quit", lua.LChannel(quit))
    if err := L.DoString(`
    ch:send("1")
    ch:send("2")
  `); err != nil {
        panic(err)
    }
    ch <- lua.LString("3")
    quit <- lua.LTrue
}

func main() {
    ch := make(chan lua.LValue)
    quit := make(chan lua.LValue)
    go receiver(ch, quit)
    go sender(ch, quit)
    time.Sleep(3 * time.Second)
}
Go API

ToChannel, CheckChannel, OptChannel are available.

Refer to Go doc(LState methods) for further information.

Lua API

  • channel.make([buf:int]) -> ch:channel

    • Create new channel that has a buffer size of buf. By default, buf is 0.

  • channel.select(case:table [, case:table, case:table ...]) -> {index:int, recv:any, ok}

    • Same as the select statement in Go. It returns the index of the chosen case and, if that case was a receive operation, the value received and a boolean indicating whether the channel has been closed.
    • case is a table that outlined below.
      • receiving: {"|<-", ch:channel [, handler:func(ok, data:any)]}
      • sending: {"<-|", ch:channel, data:any [, handler:func(data:any)]}
      • default: {"default" [, handler:func()]}

channel.select examples:

local idx, recv, ok = channel.select(
  {"|<-", ch1},
  {"|<-", ch2}
)
if not ok then
    print("closed")
elseif idx == 1 then -- received from ch1
    print(recv)
elseif idx == 2 then -- received from ch2
    print(recv)
end

channel.select(
  {"|<-", ch1, function(ok, data)
    print(ok, data)
  end},
  {"<-|", ch2, "value", function(data)
    print(data)
  end},
  {"default", function()
    print("default action")
  end}
)
  • channel:send(data:any)
    • Send data over the channel.
  • channel:receive() -> ok:bool, data:any
    • Receive some data over the channel.
  • channel:close()
    • Close the channel.
The LState pool pattern

To create per-thread LState instances, You can use the sync.Pool like mechanism.

type lStatePool struct {
    m     sync.Mutex
    saved []*lua.LState
}

func (pl *lStatePool) Get() *lua.LState {
    pl.m.Lock()
    defer pl.m.Unlock()
    n := len(pl.saved)
    if n == 0 {
        return pl.New()
    }
    x := pl.saved[n-1]
    pl.saved = pl.saved[0 : n-1]
    return x
}

func (pl *lStatePool) New() *lua.LState {
    L := lua.NewState()
    // setting the L up here.
    // load scripts, set global variables, share channels, etc...
    return L
}

func (pl *lStatePool) Put(L *lua.LState) {
    pl.m.Lock()
    defer pl.m.Unlock()
    pl.saved = append(pl.saved, L)
}

func (pl *lStatePool) Shutdown() {
    for _, L := range pl.saved {
        L.Close()
    }
}

// Global LState pool
var luaPool = &lStatePool{
    saved: make([]*lua.LState, 0, 4),
}

Now, you can get per-thread LState objects from the luaPool .

func MyWorker() {
   L := luaPool.Get()
   defer luaPool.Put(L)
   /* your code here */
}

func main() {
    defer luaPool.Shutdown()
    go MyWorker()
    go MyWorker()
    /* etc... */
}

Differences between Lua and GopherLua

Goroutines
  • GopherLua supports channel operations.
    • GopherLua has a type named channel.
    • The channel table provides functions for performing channel operations.
Unsupported functions
  • string.dump
  • os.setlocale
  • lua_Debug.namewhat
  • package.loadlib
  • debug hooks
Miscellaneous notes
  • collectgarbage does not take any arguments and runs the garbage collector for the entire Go program.
  • file:setvbuf does not support a line buffering.
  • Daylight saving time is not supported.
  • GopherLua has a function to set an environment variable : os.setenv(name, value)
  • GopherLua support goto and ::label:: statement in Lua5.2.
    • goto is a keyword and not a valid variable name.

Standalone interpreter

Lua has an interpreter called lua . GopherLua has an interpreter called glua .

go get github.com/yuin/gopher-lua/cmd/glua

glua has same options as lua .

How to Contribute

See Guidelines for contributors .

Libraries for GopherLua

Donation

BTC: 1NEDSyUmo4SMTDP83JJQSWi1MvQUGGNMZB

License

MIT

Author

Yusuke Inuzuka

Documentation

Overview

GopherLua: VM and compiler for Lua in Go

Index

Constants

View Source 
const (
	VarArgHasArg   uint8 = 1
	VarArgIsVarArg uint8 = 2
	VarArgNeedsArg uint8 = 4
)
View Source 
const (
	// BaseLibName is here for consistency; the base functions have no namespace/library.
	BaseLibName = ""
	// LoadLibName is here for consistency; the loading system has no namespace/library.
	LoadLibName = "package"
	// TabLibName is the name of the table Library.
	TabLibName = "table"
	// IoLibName is the name of the io Library.
	IoLibName = "io"
	// OsLibName is the name of the os Library.
	OsLibName = "os"
	// StringLibName is the name of the string Library.
	StringLibName = "string"
	// MathLibName is the name of the math Library.
	MathLibName = "math"
	// DebugLibName is the name of the debug Library.
	DebugLibName = "debug"
	// ChannelLibName is the name of the channel Library.
	ChannelLibName = "channel"
	// CoroutineLibName is the name of the coroutine Library.
	CoroutineLibName = "coroutine"
)
View Source 
const (
	OP_MOVE     int = iota /*      A B     R(A) := R(B)                            */
	OP_MOVEN               /*      A B     R(A) := R(B); followed by R(C) MOVE ops */
	OP_LOADK               /*     A Bx    R(A) := Kst(Bx)                          */
	OP_LOADBOOL            /*  A B C   R(A) := (Bool)B; if (C) pc++                */
	OP_LOADNIL             /*   A B     R(A) := ... := R(B) := nil                 */
	OP_GETUPVAL            /*  A B     R(A) := UpValue[B]                          */

	OP_GETGLOBAL  /* A Bx    R(A) := Gbl[Kst(Bx)]                            */
	OP_GETTABLE   /*  A B C   R(A) := R(B)[RK(C)]                             */
	OP_GETTABLEKS /*  A B C   R(A) := R(B)[RK(C)] ; RK(C) is constant string */

	OP_SETGLOBAL  /* A Bx    Gbl[Kst(Bx)] := R(A)                            */
	OP_SETUPVAL   /*  A B     UpValue[B] := R(A)                              */
	OP_SETTABLE   /*  A B C   R(A)[RK(B)] := RK(C)                            */
	OP_SETTABLEKS /*  A B C   R(A)[RK(B)] := RK(C) ; RK(B) is constant string */

	OP_NEWTABLE /*  A B C   R(A) := {} (size = BC)                         */

	OP_SELF /*      A B C   R(A+1) := R(B); R(A) := R(B)[RK(C)]             */

	OP_ADD /*       A B C   R(A) := RK(B) + RK(C)                           */
	OP_SUB /*       A B C   R(A) := RK(B) - RK(C)                           */
	OP_MUL /*       A B C   R(A) := RK(B) * RK(C)                           */
	OP_DIV /*       A B C   R(A) := RK(B) / RK(C)                           */
	OP_MOD /*       A B C   R(A) := RK(B) % RK(C)                           */
	OP_POW /*       A B C   R(A) := RK(B) ^ RK(C)                           */
	OP_UNM /*       A B     R(A) := -R(B)                                   */
	OP_NOT /*       A B     R(A) := not R(B)                                */
	OP_LEN /*       A B     R(A) := length of R(B)                          */

	OP_CONCAT /*    A B C   R(A) := R(B).. ... ..R(C)                       */

	OP_JMP /*       sBx     pc+=sBx                                 */

	OP_EQ /*        A B C   if ((RK(B) == RK(C)) ~= A) then pc++            */
	OP_LT /*        A B C   if ((RK(B) <  RK(C)) ~= A) then pc++            */
	OP_LE /*        A B C   if ((RK(B) <= RK(C)) ~= A) then pc++            */

	OP_TEST    /*      A C     if not (R(A) <=> C) then pc++                   */
	OP_TESTSET /*   A B C   if (R(B) <=> C) then R(A) := R(B) else pc++     */

	OP_CALL     /*      A B C   R(A) ... R(A+C-2) := R(A)(R(A+1) ... R(A+B-1)) */
	OP_TAILCALL /*  A B C   return R(A)(R(A+1) ... R(A+B-1))              */
	OP_RETURN   /*    A B     return R(A) ... R(A+B-2)      (see note)      */

	OP_FORLOOP /*   A sBx   R(A)+=R(A+2);
	     if R(A) <?= R(A+1) then { pc+=sBx; R(A+3)=R(A) }*/
	OP_FORPREP /*   A sBx   R(A)-=R(A+2); pc+=sBx                           */

	OP_TFORLOOP /*  A C     R(A+3) ... R(A+3+C) := R(A)(R(A+1) R(A+2));
	    if R(A+3) ~= nil then { pc++; R(A+2)=R(A+3); }  */
	OP_SETLIST /*   A B C   R(A)[(C-1)*FPF+i] := R(A+i) 1 <= i <= B        */

	OP_CLOSE   /*     A       close all variables in the stack up to (>=) R(A)*/
	OP_CLOSURE /*   A Bx    R(A) := closure(KPROTO[Bx] R(A) ... R(A+n))  */

	OP_VARARG /*     A B     R(A) R(A+1) ... R(A+B-1) = vararg            */

	OP_NOP /* NOP */
)
View Source 
const EnvironIndex = -10001
View Source 
const FramesPerSegment = 8

FramesPerSegment should be a power of 2 constant for performance reasons. It will allow the go compiler to change the divs and mods into bitshifts. Max is 256 due to current use of uint8 to count how many frames in a segment are used.

View Source 
const GlobalsIndex = -10002
View Source 
const LNumberBit = 64
View Source 
const LNumberScanFormat = "%f"
View Source 
const LuaVersion = "Lua 5.1"
View Source 
const MultRet = -1
View Source 
const PackageAuthors = "Yusuke Inuzuka"
View Source 
const PackageCopyRight = PackageName + " " + PackageVersion + " Copyright (C) 2015 -2017 " + PackageAuthors
View Source 
const PackageName = "GopherLua"
View Source 
const PackageVersion = "0.1"
View Source 
const RegistryIndex = -10000

Variables

View Source 
var CallStackSize = 256
View Source 
var CompatVarArg = true
View Source 
var FieldsPerFlush = 50
View Source 
var LFalse = LBool(false)
View Source 
var LNil = LValue(&LNilType{})
View Source 
var LTrue = LBool(true)
View Source 
var LuaDirSep string
View Source 
var LuaExecDir = "!"
View Source 
var LuaIgMark = "-"
View Source 
var LuaLDir string
View Source 
var LuaOS string
View Source 
var LuaPath = "LUA_PATH"
View Source 
var LuaPathDefault string
View Source 
var LuaPathMark = "?"
View Source 
var LuaPathSep = ";"
View Source 
var MaxArrayIndex = 67108864
View Source 
var MaxTableGetLoop = 100
View Source 
var RegistryGrowStep = 32
View Source 
var RegistrySize = 256 * 20

Functions

func LVAsBool 

func LVAsBool(v LValue) bool

LVIsFalse returns false if a given LValue is a nil or false otherwise true.

func LVAsString 

func LVAsString(v LValue) string

LVAsString returns string representation of a given LValue if the LValue is a string or number, otherwise an empty string.

func LVCanConvToString 

func LVCanConvToString(v LValue) bool

LVCanConvToString returns true if a given LValue is a string or number otherwise false.

func LVIsFalse 

func LVIsFalse(v LValue) bool

LVIsFalse returns true if a given LValue is a nil or false otherwise false.

func OpenBase 

func OpenBase(L *LState) int

func OpenChannel 

func OpenChannel(L *LState) int

func OpenCoroutine 

func OpenCoroutine(L *LState) int

func OpenDebug 

func OpenDebug(L *LState) int

func OpenIo 

func OpenIo(L *LState) int

func OpenMath 

func OpenMath(L *LState) int

func OpenOs 

func OpenOs(L *LState) int

func OpenPackage 

func OpenPackage(L *LState) int

func OpenString 

func OpenString(L *LState) int

func OpenTable 

func OpenTable(L *LState) int

func UpvalueIndex 

func UpvalueIndex(i int) int

Types

type ApiError 

type ApiError struct {
	Type       ApiErrorType
	Object     LValue
	StackTrace string
	// Underlying error. This attribute is set only if the Type is ApiErrorFile or ApiErrorSyntax
	Cause error
}

func (*ApiError) Error 

func (e *ApiError) Error() string

type ApiErrorType 

type ApiErrorType int
const (
	ApiErrorSyntax ApiErrorType = iota
	ApiErrorFile
	ApiErrorRun
	ApiErrorError
	ApiErrorPanic
)

type CompileError 

type CompileError struct {
	Line    int
	Message string
	// contains filtered or unexported fields
}

func (*CompileError) Error 

func (e *CompileError) Error() string

type DbgCall 

type DbgCall struct {
	Name string
	Pc   int
}

type DbgLocalInfo 

type DbgLocalInfo struct {
	Name    string
	StartPc int
	EndPc   int
}

type Debug 

type Debug struct {
	Name            string
	What            string
	Source          string
	CurrentLine     int
	NUpvalues       int
	LineDefined     int
	LastLineDefined int
	// contains filtered or unexported fields
}

type FunctionProto 

type FunctionProto struct {
	SourceName         string
	LineDefined        int
	LastLineDefined    int
	NumUpvalues        uint8
	NumParameters      uint8
	IsVarArg           uint8
	NumUsedRegisters   uint8
	Code               []uint32
	Constants          []LValue
	FunctionPrototypes []*FunctionProto

	DbgSourcePositions []int
	DbgLocals          []*DbgLocalInfo
	DbgCalls           []DbgCall
	DbgUpvalues        []string
	// contains filtered or unexported fields
}

func Compile 

func Compile(chunk []ast.Stmt, name string) (proto *FunctionProto, err error)

func (*FunctionProto) String 

func (fp *FunctionProto) String() string

func (*FunctionProto) StringConstants added in v0.0.2 

func (fp *FunctionProto) StringConstants() []string

StringConstants exposes the string-constants table used by the *KS opcodes and SETGLOBAL (backend access).

type Global 

type Global struct {
	MainThread    *LState
	CurrentThread *LState
	Registry      *LTable
	Global        *LTable
	// contains filtered or unexported fields
}

type LBool 

type LBool bool

func (LBool) String 

func (bl LBool) String() string

func (LBool) Type 

func (bl LBool) Type() LValueType

type LChannel 

type LChannel chan LValue

func (LChannel) String 

func (ch LChannel) String() string

func (LChannel) Type 

func (ch LChannel) Type() LValueType

type LFunction 

type LFunction struct {
	IsG       bool
	Env       *LTable
	Proto     *FunctionProto
	GFunction LGFunction
	Upvalues  []*Upvalue
}

func (*LFunction) LocalName 

func (fn *LFunction) LocalName(regno, pc int) (string, bool)

func (*LFunction) String 

func (fn *LFunction) String() string

func (*LFunction) Type 

func (fn *LFunction) Type() LValueType

type LGFunction 

type LGFunction func(*LState) int

type LNilType 

type LNilType struct{}

func (*LNilType) String 

func (nl *LNilType) String() string

func (*LNilType) Type 

func (nl *LNilType) Type() LValueType

type LNumber 

type LNumber float64

func LVAsNumber 

func LVAsNumber(v LValue) LNumber

LVAsNumber tries to convert a given LValue to a number.

func (LNumber) Format 

func (nm LNumber) Format(f fmt.State, c rune)

fmt.Formatter interface

func (LNumber) String 

func (nm LNumber) String() string

func (LNumber) Type 

func (nm LNumber) Type() LValueType

type LState 

type LState struct {
	G       *Global
	Parent  *LState
	Env     *LTable
	Panic   func(*LState)
	Dead    bool
	Options Options
	// contains filtered or unexported fields
}

func NewState 

func NewState(opts ...Options) *LState

func (*LState) ArgError 

func (ls *LState) ArgError(n int, message string)

func (*LState) Call 

func (ls *LState) Call(nargs, nret int)

func (*LState) CallByParam 

func (ls *LState) CallByParam(cp P, args ...LValue) error

func (*LState) CallMeta 

func (ls *LState) CallMeta(obj LValue, event string) LValue

func (*LState) CheckAny 

func (ls *LState) CheckAny(n int) LValue

func (*LState) CheckBool 

func (ls *LState) CheckBool(n int) bool

func (*LState) CheckChannel 

func (ls *LState) CheckChannel(n int) chan LValue

Checks whether the given index is an LChannel and returns this channel.

func (*LState) CheckFunction 

func (ls *LState) CheckFunction(n int) *LFunction

func (*LState) CheckInt 

func (ls *LState) CheckInt(n int) int

func (*LState) CheckInt64 

func (ls *LState) CheckInt64(n int) int64

func (*LState) CheckNumber 

func (ls *LState) CheckNumber(n int) LNumber

func (*LState) CheckOption 

func (ls *LState) CheckOption(n int, options []string) int

func (*LState) CheckString 

func (ls *LState) CheckString(n int) string

func (*LState) CheckTable 

func (ls *LState) CheckTable(n int) *LTable

func (*LState) CheckThread 

func (ls *LState) CheckThread(n int) *LState

func (*LState) CheckType 

func (ls *LState) CheckType(n int, typ LValueType)

func (*LState) CheckTypes 

func (ls *LState) CheckTypes(n int, typs ...LValueType)

func (*LState) CheckUserData 

func (ls *LState) CheckUserData(n int) *LUserData

func (*LState) Close 

func (ls *LState) Close()

func (*LState) Concat 

func (ls *LState) Concat(values ...LValue) string

func (*LState) Context 

func (ls *LState) Context() context.Context

Context returns the LState's context. To change the context, use WithContext.

func (*LState) CreateTable 

func (ls *LState) CreateTable(acap, hcap int) *LTable

func (*LState) DoFile 

func (ls *LState) DoFile(path string) error

func (*LState) DoString 

func (ls *LState) DoString(source string) error

func (*LState) Equal 

func (ls *LState) Equal(lhs, rhs LValue) bool

func (*LState) Error 

func (ls *LState) Error(lv LValue, level int)

This function is equivalent to lua_error( http://www.lua.org/manual/5.1/manual.html#lua_error ).

func (*LState) FindTable 

func (ls *LState) FindTable(obj *LTable, n string, size int) LValue

func (*LState) ForEach 

func (ls *LState) ForEach(tb *LTable, cb func(LValue, LValue))

func (*LState) GPCall 

func (ls *LState) GPCall(fn LGFunction, data LValue) error

func (*LState) Get 

func (ls *LState) Get(idx int) LValue

func (*LState) GetFEnv 

func (ls *LState) GetFEnv(obj LValue) LValue

func (*LState) GetField 

func (ls *LState) GetField(obj LValue, skey string) LValue

func (*LState) GetGlobal 

func (ls *LState) GetGlobal(name string) LValue

func (*LState) GetInfo 

func (ls *LState) GetInfo(what string, dbg *Debug, fn LValue) (LValue, error)

func (*LState) GetLocal 

func (ls *LState) GetLocal(dbg *Debug, no int) (string, LValue)

func (*LState) GetMetaField 

func (ls *LState) GetMetaField(obj LValue, event string) LValue

func (*LState) GetMetatable 

func (ls *LState) GetMetatable(obj LValue) LValue

func (*LState) GetStack 

func (ls *LState) GetStack(level int) (*Debug, bool)

func (*LState) GetTable 

func (ls *LState) GetTable(obj LValue, key LValue) LValue

func (*LState) GetTop 

func (ls *LState) GetTop() int

func (*LState) GetTypeMetatable 

func (ls *LState) GetTypeMetatable(typ string) LValue

func (*LState) GetUpvalue 

func (ls *LState) GetUpvalue(fn *LFunction, no int) (string, LValue)

func (*LState) Insert 

func (ls *LState) Insert(value LValue, index int)

func (*LState) IsClosed 

func (ls *LState) IsClosed() bool

func (*LState) LessThan 

func (ls *LState) LessThan(lhs, rhs LValue) bool

func (*LState) Load 

func (ls *LState) Load(reader io.Reader, name string) (*LFunction, error)

func (*LState) LoadFile 

func (ls *LState) LoadFile(path string) (*LFunction, error)

func (*LState) LoadString 

func (ls *LState) LoadString(source string) (*LFunction, error)

func (*LState) NewClosure 

func (ls *LState) NewClosure(fn LGFunction, upvalues ...LValue) *LFunction

func (*LState) NewFunction 

func (ls *LState) NewFunction(fn LGFunction) *LFunction

func (*LState) NewFunctionFromProto 

func (ls *LState) NewFunctionFromProto(proto *FunctionProto) *LFunction

func (*LState) NewTable 

func (ls *LState) NewTable() *LTable

func (*LState) NewThread 

func (ls *LState) NewThread() (*LState, context.CancelFunc)

NewThread returns a new LState that shares with the original state all global objects. If the original state has context.Context, the new state has a new child context of the original state and this function returns its cancel function.

func (*LState) NewTypeMetatable 

func (ls *LState) NewTypeMetatable(typ string) *LTable

func (*LState) NewUserData 

func (ls *LState) NewUserData() *LUserData

func (*LState) Next 

func (ls *LState) Next(tb *LTable, key LValue) (LValue, LValue)

func (*LState) ObjLen 

func (ls *LState) ObjLen(v1 LValue) int

func (*LState) OpenLibs 

func (ls *LState) OpenLibs()

OpenLibs loads the built-in libraries. It is equivalent to running OpenLoad, then OpenBase, then iterating over the other OpenXXX functions in any order.

func (*LState) OptBool 

func (ls *LState) OptBool(n int, d bool) bool

func (*LState) OptChannel 

func (ls *LState) OptChannel(n int, ch chan LValue) chan LValue

If the given index is a LChannel, returns this channel. If this argument is absent or is nil, returns ch. Otherwise, raises an error.

func (*LState) OptFunction 

func (ls *LState) OptFunction(n int, d *LFunction) *LFunction

func (*LState) OptInt 

func (ls *LState) OptInt(n int, d int) int

func (*LState) OptInt64 

func (ls *LState) OptInt64(n int, d int64) int64

func (*LState) OptNumber 

func (ls *LState) OptNumber(n int, d LNumber) LNumber

func (*LState) OptString 

func (ls *LState) OptString(n int, d string) string

func (*LState) OptTable 

func (ls *LState) OptTable(n int, d *LTable) *LTable

func (*LState) OptUserData 

func (ls *LState) OptUserData(n int, d *LUserData) *LUserData

func (*LState) PCall 

func (ls *LState) PCall(nargs, nret int, errfunc *LFunction) (err error)

func (*LState) Pop 

func (ls *LState) Pop(n int)

func (*LState) PreloadModule 

func (ls *LState) PreloadModule(name string, loader LGFunction)

Set a module loader to the package.preload table.

func (*LState) Push 

func (ls *LState) Push(value LValue)

func (*LState) RaiseError 

func (ls *LState) RaiseError(format string, args ...interface{})

This function is equivalent to luaL_error( http://www.lua.org/manual/5.1/manual.html#luaL_error ).

func (*LState) RawEqual 

func (ls *LState) RawEqual(lhs, rhs LValue) bool

func (*LState) RawGet 

func (ls *LState) RawGet(tb *LTable, key LValue) LValue

func (*LState) RawGetInt 

func (ls *LState) RawGetInt(tb *LTable, key int) LValue

func (*LState) RawSet 

func (ls *LState) RawSet(tb *LTable, key LValue, value LValue)

func (*LState) RawSetInt 

func (ls *LState) RawSetInt(tb *LTable, key int, value LValue)

func (*LState) Register 

func (ls *LState) Register(name string, fn LGFunction)

func (*LState) RegisterModule 

func (ls *LState) RegisterModule(name string, funcs map[string]LGFunction) LValue

func (*LState) Remove 

func (ls *LState) Remove(index int)

func (*LState) RemoveCallerFrame 

func (ls *LState) RemoveCallerFrame() *callFrame

RemoveCallerFrame removes the stack frame above the current stack frame. This is useful in tail calls. It returns the new current frame.

func (*LState) RemoveContext 

func (ls *LState) RemoveContext() context.Context

RemoveContext removes the context associated with this LState and returns this context.

func (*LState) Replace 

func (ls *LState) Replace(idx int, value LValue)

func (*LState) Resume 

func (ls *LState) Resume(th *LState, fn *LFunction, args ...LValue) (ResumeState, error, []LValue)

func (*LState) SetContext 

func (ls *LState) SetContext(ctx context.Context)

SetContext set a context ctx to this LState. The provided ctx must be non-nil.

func (*LState) SetFEnv 

func (ls *LState) SetFEnv(obj LValue, env LValue)

func (*LState) SetField 

func (ls *LState) SetField(obj LValue, key string, value LValue)

func (*LState) SetFuncs 

func (ls *LState) SetFuncs(tb *LTable, funcs map[string]LGFunction, upvalues ...LValue) *LTable

func (*LState) SetGlobal 

func (ls *LState) SetGlobal(name string, value LValue)

func (*LState) SetLocal 

func (ls *LState) SetLocal(dbg *Debug, no int, lv LValue) string

func (*LState) SetMetatable 

func (ls *LState) SetMetatable(obj LValue, mt LValue)

func (*LState) SetMx 

func (ls *LState) SetMx(mx int)

Set maximum memory size. This function can only be called from the main thread.

func (*LState) SetTable 

func (ls *LState) SetTable(obj LValue, key LValue, value LValue)

func (*LState) SetTop 

func (ls *LState) SetTop(idx int)

func (*LState) SetUpvalue 

func (ls *LState) SetUpvalue(fn *LFunction, no int, lv LValue) string

func (*LState) Status 

func (ls *LState) Status(th *LState) string

func (*LState) String 

func (ls *LState) String() string

func (*LState) ToBool 

func (ls *LState) ToBool(n int) bool

func (*LState) ToChannel 

func (ls *LState) ToChannel(n int) chan LValue

Converts the Lua value at the given acceptable index to the chan LValue.

func (*LState) ToFunction 

func (ls *LState) ToFunction(n int) *LFunction

func (*LState) ToInt 

func (ls *LState) ToInt(n int) int

func (*LState) ToInt64 

func (ls *LState) ToInt64(n int) int64

func (*LState) ToNumber 

func (ls *LState) ToNumber(n int) LNumber

func (*LState) ToString 

func (ls *LState) ToString(n int) string

func (*LState) ToStringMeta 

func (ls *LState) ToStringMeta(lv LValue) LValue

ToStringMeta returns string representation of given LValue. This method calls the `__tostring` meta method if defined.

func (*LState) ToTable 

func (ls *LState) ToTable(n int) *LTable

func (*LState) ToThread 

func (ls *LState) ToThread(n int) *LState

func (*LState) ToUserData 

func (ls *LState) ToUserData(n int) *LUserData

func (*LState) Type 

func (ls *LState) Type() LValueType

func (*LState) TypeError 

func (ls *LState) TypeError(n int, typ LValueType)

func (*LState) Where 

func (ls *LState) Where(level int) string

func (*LState) XMoveTo 

func (ls *LState) XMoveTo(other *LState, n int)

func (*LState) Yield 

func (ls *LState) Yield(values ...LValue) int

type LString 

type LString string

func (LString) Format 

func (st LString) Format(f fmt.State, c rune)

fmt.Formatter interface

func (LString) String 

func (st LString) String() string

func (LString) Type 

func (st LString) Type() LValueType

type LTable 

type LTable struct {
	Metatable LValue
	// contains filtered or unexported fields
}

func (*LTable) Append 

func (tb *LTable) Append(value LValue)

Append appends a given LValue to this LTable.

func (*LTable) ForEach 

func (tb *LTable) ForEach(cb func(LValue, LValue))

ForEach iterates over this table of elements, yielding each in turn to a given function.

func (*LTable) Insert 

func (tb *LTable) Insert(i int, value LValue)

Insert inserts a given LValue at position `i` in this table.

func (*LTable) Len 

func (tb *LTable) Len() int

Len returns length of this LTable without using __len.

func (*LTable) MaxN 

func (tb *LTable) MaxN() int

MaxN returns a maximum number key that nil value does not exist before it.

func (*LTable) Next 

func (tb *LTable) Next(key LValue) (LValue, LValue)

This function is equivalent to lua_next ( http://www.lua.org/manual/5.1/manual.html#lua_next ).

func (*LTable) RawGet 

func (tb *LTable) RawGet(key LValue) LValue

RawGet returns an LValue associated with a given key without __index metamethod.

func (*LTable) RawGetH 

func (tb *LTable) RawGetH(key LValue) LValue

RawGet returns an LValue associated with a given key without __index metamethod.

func (*LTable) RawGetInt 

func (tb *LTable) RawGetInt(key int) LValue

RawGetInt returns an LValue at position `key` without __index metamethod.

func (*LTable) RawGetString 

func (tb *LTable) RawGetString(key string) LValue

RawGetString returns an LValue associated with a given key without __index metamethod.

func (*LTable) RawSet 

func (tb *LTable) RawSet(key LValue, value LValue)

RawSet sets a given LValue to a given index without the __newindex metamethod. It is recommended to use `RawSetString` or `RawSetInt` for performance if you already know the given LValue is a string or number.

func (*LTable) RawSetH 

func (tb *LTable) RawSetH(key LValue, value LValue)

RawSetH sets a given LValue to a given index without the __newindex metamethod.

func (*LTable) RawSetInt 

func (tb *LTable) RawSetInt(key int, value LValue)

RawSetInt sets a given LValue at a position `key` without the __newindex metamethod.

func (*LTable) RawSetString 

func (tb *LTable) RawSetString(key string, value LValue)

RawSetString sets a given LValue to a given string index without the __newindex metamethod.

func (*LTable) Remove 

func (tb *LTable) Remove(pos int) LValue

Remove removes from this table the element at a given position.

func (*LTable) String 

func (tb *LTable) String() string

func (*LTable) Type 

func (tb *LTable) Type() LValueType

type LUserData 

type LUserData struct {
	Value     interface{}
	Env       *LTable
	Metatable LValue
}

func (*LUserData) String 

func (ud *LUserData) String() string

func (*LUserData) Type 

func (ud *LUserData) Type() LValueType

type LValue 

type LValue interface {
	String() string
	Type() LValueType
}

type LValueType 

type LValueType int
const (
	LTNil LValueType = iota
	LTBool
	LTNumber
	LTString
	LTFunction
	LTUserData
	LTThread
	LTTable
	LTChannel
)

func (LValueType) String 

func (vt LValueType) String() string

type Options 

type Options struct {
	// Call stack size. This defaults to `lua.CallStackSize`.
	CallStackSize int
	// Data stack size. This defaults to `lua.RegistrySize`.
	RegistrySize int
	// Allow the registry to grow from the registry size specified up to a value of RegistryMaxSize. A value of 0
	// indicates no growth is permitted. The registry will not shrink again after any growth.
	RegistryMaxSize int
	// If growth is enabled, step up by an additional `RegistryGrowStep` each time to avoid having to resize too often.
	// This defaults to `lua.RegistryGrowStep`
	RegistryGrowStep int
	// Controls whether or not libraries are opened by default
	SkipOpenLibs bool
	// Tells whether a Go stacktrace should be included in a Lua stacktrace when panics occur.
	IncludeGoStackTrace bool
	// If `MinimizeStackMemory` is set, the call stack will be automatically grown or shrank up to a limit of
	// `CallStackSize` in order to minimize memory usage. This does incur a slight performance penalty.
	MinimizeStackMemory bool
}

Options is a configuration that is used to create a new LState.

type P 

type P struct {
	Fn      LValue
	NRet    int
	Protect bool
	Handler *LFunction
}

type ResumeState 

type ResumeState int
const (
	ResumeOK ResumeState = iota
	ResumeYield
	ResumeError
)

type Upvalue 

type Upvalue struct {
	// contains filtered or unexported fields
}

func (*Upvalue) Close 

func (uv *Upvalue) Close()

func (*Upvalue) IsClosed 

func (uv *Upvalue) IsClosed() bool

func (*Upvalue) SetValue 

func (uv *Upvalue) SetValue(value LValue)

func (*Upvalue) Value 

func (uv *Upvalue) Value() LValue

Source Files

View all Source files

Directories

Path Synopsis
cmd
clua-run command
Command clua-run runs a Lua script under stock C Lua 5.1 (the wasm oracle blob, lua51_sjlj.wasm) with the CLI-arg surface the other runners provide — the third engine for _cli-tests:
 Command clua-run runs a Lua script under stock C Lua 5.1 (the wasm oracle blob, lua51_sjlj.wasm) with the CLI-arg surface the other runners provide — the third engine for _cli-tests:
glua command
luafuzz command
Command luafuzz is the M6e differential fuzzer CLI: a deterministic seeded generator driving the testdiff engines, with a chunk- resumable soak designed for a laptop that sleeps and moves between networks daily (all state under -dir; every interruption is safe).
 Command luafuzz is the M6e differential fuzzer CLI: a deterministic seeded generator driving the testdiff engines, with a chunk- resumable soak designed for a laptop that sleeps and moves between networks daily (all state under -dir; every interruption is safe).
luawasm-run command
Command luawasm-run executes a module saved by cmd/luawasmc against the C-Lua rt_* runtime (embedded lua51_sjlj.wasm) on wasmtime — or on the pure-Go wazero production engine when GLUA_WASM_ENGINE=wazero (ledger row 32: one blob, two hosts).
 Command luawasm-run executes a module saved by cmd/luawasmc against the C-Lua rt_* runtime (embedded lua51_sjlj.wasm) on wasmtime — or on the pure-Go wazero production engine when GLUA_WASM_ENGINE=wazero (ledger row 32: one blob, two hosts).
luawasmc command
Command luawasmc compiles a Lua 5.1 script to a WebAssembly module.
 Command luawasmc compiles a Lua 5.1 script to a WebAssembly module.
testdiff command
Command testdiff runs a corpus across engines and reports log diffs.
 Command testdiff runs a corpus across engines and reports log diffs.
examples
eval command
Command eval is the minimal host-package demonstration (design §6.3): compile once, run with KEYS/ARGV, print the reply values — plus one host function so the redis.call seam is visible end to end.
 Command eval is the minimal host-package demonstration (design §6.3): compile once, run with KEYS/ARGV, print the reply values — plus one host function so the redis.call seam is visible end to end.
evalserver command
Command evalserver is the thread-proofing demonstration (design §6.3): concurrent EVALs against a pool of locked VMs — the deployment shape a daemon actually uses.
 Command evalserver is the thread-proofing demonstration (design §6.3): concurrent EVALs against a pool of locked VMs — the deployment shape a daemon actually uses.
sharedvm command
Command sharedvm is the single-shared-VM deployment mode (design §6.3): one Lua memory image, many goroutines — VM.Run serializes on the image lock (A9) and scripts observe each other's globals, exactly like Redis-classic single-state script execution.
 Command sharedvm is the single-shared-VM deployment mode (design §6.3): one Lua memory image, many goroutines — VM.Run serializes on the image lock (A9) and scripts observe each other's globals, exactly like Redis-classic single-state script execution.
Package host is the public Go API a pure-Go daemon (the Ultima Redis clone) imports to run untrusted Lua scripts: compile to wasm, execute on wazero against the embedded production runtime blob, exchange values with in-script host functions (the redis.call seam).
 Package host is the public Go API a pure-Go daemon (the Ultima Redis clone) imports to run untrusted Lua scripts: compile to wasm, execute on wazero against the embedded production runtime blob, exchange values with in-script host functions (the redis.call seam).
Package luafuzz is the M6e differential fuzzer: a deterministic Lua program generator (design doc §8.4 L5) plus an interruptible, chunk-resumable soak runner (m6 plan §4.5/D6).
 Package luafuzz is the M6e differential fuzzer: a deterministic Lua program generator (design doc §8.4 L5) plus an interruptible, chunk-resumable soak runner (m6 plan §4.5/D6).
Package luawasm is the Lua→wasm backend (design doc §4, milestones M4–M5): FunctionProto trees from the gopher-lua frontend become wasm modules that share linear memory with the C runtime and call down through the frozen rt_* ABI (runtime/rt_abi.h).
 Package luawasm is the Lua→wasm backend (design doc §4, milestones M4–M5): FunctionProto trees from the gopher-lua frontend become wasm modules that share linear memory with the C runtime and call down through the frozen rt_* ABI (runtime/rt_abi.h).
Lua pattern match functions for Go
 Lua pattern match functions for Go
Package testdiff is the differential testing harness of the Lua→wasm project (docs/Lua-Wasm-Design-and-Test-Plan.md §7–§8, milestone M1).
 Package testdiff is the differential testing harness of the Lua→wasm project (docs/Lua-Wasm-Design-and-Test-Plan.md §7–§8, milestone M1).
Package wasm is a minimal, dependency-free emitter for WebAssembly 1.0/2.0 core binary modules.
 Package wasm is a minimal, dependency-free emitter for WebAssembly 1.0/2.0 core binary modules.

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