aliases.go

@@ -66,14 +66,13 @@ func (a *aliasHandler) Resolve(cmdstr string) string {
 
 // lua section
 
-func (a *aliasHandler) Loader(rtm *rt.Runtime) *rt.Table {
+func (a *aliasHandler) Loader(rtm *rt.Runtime) *rt.Table  {
 	// create a lua module with our functions
 	hshaliasesLua := map[string]util.LuaExport{
 		"add": util.LuaExport{a.luaAdd, 2, false},
 		"list": util.LuaExport{a.luaList, 0, false},
 		"del": util.LuaExport{a.luaDelete, 1, false},
 	}
-
 	mod := rt.NewTable()
 	util.SetExports(rtm, mod, hshaliasesLua)
 

api.go

@@ -31,14 +31,10 @@ var exports = map[string]util.LuaExport{
 	"cwd": util.LuaExport{hlcwd, 0, false},
 /*
 	"exec": hlexec,
-*/
+	"runnerMode": hlrunnerMode,
-	"runnerMode": util.LuaExport{hlrunnerMode, 1, false},
-/*
 	"goro": hlgoro,
-*/
+	"highlighter": hlhighlighter,
-	"highlighter": util.LuaExport{hlhighlighter, 1, false},
+	"hinter": hlhinter,
-	"hinter": util.LuaExport{hlhinter, 1, false},
-/*
 	"multiprompt": hlmlprompt,
 	"prependPath": hlprependPath,
 */
@@ -65,7 +61,7 @@ func hilbishLoad(rtm *rt.Runtime) (rt.Value, func()) {
 	util.SetExports(rtm, mod, exports)
 	hshMod = mod
 
-	host, _ := os.Hostname()
+//	host, _ := os.Hostname()
 	username := curuser.Username
 
 	if runtime.GOOS == "windows" {
@@ -76,17 +72,22 @@ func hilbishLoad(rtm *rt.Runtime) (rt.Value, func()) {
 The nice lil shell for {blue}Lua{reset} fanatics!
 Check out the {blue}{bold}guide{reset} command to get started.
 `
-	util.SetField(rtm, mod, "ver", rt.StringValue(version), "Hilbish version")
+/*
-	util.SetField(rtm, mod, "user", rt.StringValue(username), "Username of user")
+	util.SetField(L, mod, "ver", lua.LString(version), "Hilbish version")
-	util.SetField(rtm, mod, "host", rt.StringValue(host), "Host name of the machine")
+	util.SetField(L, mod, "user", lua.LString(username), "Username of user")
+	util.SetField(L, mod, "host", lua.LString(host), "Host name of the machine")
+*/
 	util.SetField(rtm, mod, "home", rt.StringValue(curuser.HomeDir), "Home directory of the user")
 	util.SetField(rtm, mod, "dataDir", rt.StringValue(dataDir), "Directory for Hilbish's data files")
-	util.SetField(rtm, mod, "interactive", rt.BoolValue(interactive), "If this is an interactive shell")
+/*
-	util.SetField(rtm, mod, "login", rt.BoolValue(login), "Whether this is a login shell")
+	util.SetField(L, mod, "interactive", lua.LBool(interactive), "If this is an interactive shell")
+	util.SetField(L, mod, "login", lua.LBool(interactive), "Whether this is a login shell")
+*/
 	util.SetField(rtm, mod, "greeting", rt.StringValue(greeting), "Hilbish's welcome message for interactive shells. It has Lunacolors formatting.")
-	util.SetField(rtm, mod, "vimMode", rt.NilValue, "Current Vim mode of Hilbish (nil if not in Vim mode)")
+	/*util.SetField(l, mod, "vimMode", lua.LNil, "Current Vim mode of Hilbish (nil if not in Vim mode)")
-	util.SetField(rtm, hshMod, "exitCode", rt.IntValue(0), "Exit code of last exected command")
+	util.SetField(l, hshMod, "exitCode", lua.LNumber(0), "Exit code of last exected command")
-	//util.Document(rtm, mod, "Hilbish's core API, containing submodules and functions which relate to the shell itself.")
+	util.Document(L, mod, "Hilbish's core API, containing submodules and functions which relate to the shell itself.")
+*/
 
 	// hilbish.userDir table
 	hshuser := rt.NewTable()
@@ -128,17 +129,19 @@ Check out the {blue}{bold}guide{reset} command to get started.
 	util.Document(L, hshcomp, "Completions interface for Hilbish.")
 	L.SetField(mod, "completion", hshcomp)
 
-*/
 	// hilbish.runner table
-	runnerModule := runnerModeLoader(rtm)
+	runnerModule := runnerModeLoader(L)
-	//util.Document(L, runnerModule, "Runner/exec interface for Hilbish.")
+	util.Document(L, runnerModule, "Runner/exec interface for Hilbish.")
-	mod.Set(rt.StringValue("runner"), rt.TableValue(runnerModule))
+	L.SetField(mod, "runner", runnerModule)
+*/
 
 	// hilbish.jobs table
 	jobs = newJobHandler()
-	jobModule := jobs.loader(rtm)
+/*
-//	util.Document(L, jobModule, "(Background) job interface.")
+	jobModule := jobs.loader(L)
-	mod.Set(rt.StringValue("jobs"), rt.TableValue(jobModule))
+	util.Document(L, jobModule, "(Background) job interface.")
+	L.SetField(mod, "jobs", jobModule)
+*/
 
 	return rt.TableValue(mod), nil
 }
@@ -542,6 +545,7 @@ func hlinputMode(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) {
 	return c.Next(), nil
 }
 
+/*
 // runnerMode(mode)
 // Sets the execution/runner mode for interactive Hilbish. This determines whether
 // Hilbish wll try to run input as Lua and/or sh or only do one of either.
@@ -549,24 +553,24 @@ func hlinputMode(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) {
 // sh, and lua. It also accepts a function, to which if it is passed one
 // will call it to execute user input instead.
 // --- @param mode string|function
-func hlrunnerMode(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) {
+func hlrunnerMode(L *lua.LState) int {
-	if err := c.Check1Arg(); err != nil {
+	mode := L.CheckAny(1)
-		return nil, err
-	}
-	mode := c.Arg(0)
-
 	switch mode.Type() {
-		case rt.StringType:
+		case lua.LTString:
-			switch mode.AsString() {
+			switch mode.String() {
 				// no fallthrough doesnt work so eh
-				case "hybrid", "hybridRev", "lua", "sh": runnerMode = mode
+				case "hybrid": fallthrough
-				default: return nil, errors.New("execMode: expected either a function or hybrid, hybridRev, lua, sh. Received " + mode.AsString())
+				case "hybridRev": fallthrough
+				case "lua": fallthrough
+				case "sh":
+					runnerMode = mode
+				default: L.RaiseError("execMode: expected either a function or hybrid, hybridRev, lua, sh. Received %v", mode)
 			}
-		case rt.FunctionType: runnerMode = mode
+		case lua.LTFunction: runnerMode = mode
-		default: return nil, errors.New("execMode: expected either a function or hybrid, hybridRev, lua, sh. Received " + mode.TypeName())
+		default: L.RaiseError("execMode: expected either a function or hybrid, hybridRev, lua, sh. Received %v", mode)
 	}
 
-	return c.Next(), nil
+	return 0
 }
 
 // hinter(cb)
@@ -575,17 +579,11 @@ func hlrunnerMode(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) {
 // the current line and the position. It is expected to return a string
 // which will be used for the hint.
 // --- @param cb function
-func hlhinter(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) {
+func hlhinter(L *lua.LState) int {
-	if err := c.Check1Arg(); err != nil {
+	hinterCb := L.CheckFunction(1)
-		return nil, err
-	}
-	hinterCb, err := c.ClosureArg(0)
-	if err != nil {
-		return nil, err
-	}
 	hinter = hinterCb
 	
-	return c.Next(), err
+	return 0
 }
 
 // highlighter(cb)
@@ -594,15 +592,10 @@ func hlhinter(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) {
 // is passed the current line as typed and is expected to return a line that will
 // be used to display in the line.
 // --- @param cb function
-func hlhighlighter(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) {
+func hlhighlighter(L *lua.LState) int {
-	if err := c.Check1Arg(); err != nil {
+	highlighterCb := L.CheckFunction(1)
-		return nil, err
-	}
-	highlighterCb, err := c.ClosureArg(0)
-	if err != nil {
-		return nil, err
-	}
 	highlighter = highlighterCb
 
-	return c.Next(), err
+	return 0
 }
+*/

exec.go

@@ -24,15 +24,15 @@ import (
 )
 
 var errNotExec = errors.New("not executable")
-var runnerMode rt.Value = rt.StringValue("hybrid")
+//var runnerMode lua.LValue = lua.LString("hybrid")
 
 func runInput(input string, priv bool) {
 	running = true
 	cmdString := aliases.Resolve(input)
 	hooks.Em.Emit("command.preexec", input, cmdString)
 
-	if runnerMode.Type() == rt.StringType {
+//	if runnerMode.Type() == lua.LTString {
-		switch runnerMode.AsString() {
+		switch /*runnerMode.String()*/ "hybrid" {
 			case "hybrid":
 				_, err := handleLua(cmdString)
 				if err == nil {
@@ -68,29 +68,35 @@ func runInput(input string, priv bool) {
 				}
 				cmdFinish(exitCode, cmdString, priv)
 		}
-	} else {
+//	} else {
 		// can only be a string or function so
-		term := rt.NewTerminationWith(l.MainThread().CurrentCont(), 2, false)
+		/*
-		err := rt.Call(l.MainThread(), runnerMode, []rt.Value{rt.StringValue(cmdString)}, term)
+		err := l.CallByParam(lua.P{
+			Fn: runnerMode,
+			NRet: 2,
+			Protect: true,
+		}, lua.LString(cmdString))
 		if err != nil {
 			fmt.Fprintln(os.Stderr, err)
 			cmdFinish(124, cmdString, priv)
 			return
 		}
 
-		luaexitcode := term.Get(0) // first return value (makes sense right i love stacks)
+		luaexitcode := l.Get(-2) // first return value (makes sense right i love stacks)
-		runErr := term.Get(1)
+		runErr := l.Get(-1)
+		l.Pop(2)
 
 		var exitCode uint8
-		if code, ok := luaexitcode.TryInt(); ok {
+		if code, ok := luaexitcode.(lua.LNumber); luaexitcode != lua.LNil && ok {
 			exitCode = uint8(code)
 		}
 
-		if runErr != rt.NilValue {
+		if runErr != lua.LNil {
 			fmt.Fprintln(os.Stderr, runErr)
 		}
 		cmdFinish(exitCode, cmdString, priv)
-	}
+		*/
+//	}
 }
 
 func handleLua(cmdString string) (uint8, error) {

golibs/bait/bait.go

@@ -24,14 +24,14 @@ func New() Bait {
 		Em: emitter,
 	}
 	b.Loader = packagelib.Loader{
-		Load: b.loaderFunc,
+		Load: b.LoaderFunc,
 		Name: "bait",
 	}
 
 	return b
 }
 
-func (b *Bait) loaderFunc(rtm *rt.Runtime) (rt.Value, func()) {
+func (b *Bait) LoaderFunc(rtm *rt.Runtime) (rt.Value, func()) {
 	exports := map[string]util.LuaExport{
 		"catch": util.LuaExport{b.bcatch, 2, false},
 		"catchOnce": util.LuaExport{b.bcatchOnce, 2, false},

golibs/commander/commander.go

@@ -18,14 +18,14 @@ func New() Commander {
 		Events: emission.NewEmitter(),
 	}
 	c.Loader = packagelib.Loader{
-		Load: c.loaderFunc,
+		Load: c.LoaderFunc,
 		Name: "commander",
 	}
 
 	return c
 }
 
-func (c *Commander) loaderFunc(rtm *rt.Runtime) (rt.Value, func()) {
+func (c *Commander) LoaderFunc(rtm *rt.Runtime) (rt.Value, func()) {
 	exports := map[string]util.LuaExport{
 		"register": util.LuaExport{c.cregister, 2, false},
 		"deregister": util.LuaExport{c.cderegister, 1, false},

golibs/fs/fs.go

@@ -12,11 +12,11 @@ import (
 )
 
 var Loader = packagelib.Loader{
-	Load: loaderFunc,
+	Load: LoaderFunc,
 	Name: "fs",
 }
 
-func loaderFunc(rtm *rt.Runtime) (rt.Value, func()) {
+func LoaderFunc(rtm *rt.Runtime) (rt.Value, func()) {
 	exports := map[string]util.LuaExport{
 		"cd": util.LuaExport{fcd, 1, false},
 		"mkdir": util.LuaExport{fmkdir, 2, false},

job.go

@@ -3,10 +3,6 @@ package main
 import (
 	"sync"
 	"os"
-
-	"hilbish/util"
-
-	rt "github.com/arnodel/golua/runtime"
 )
 
 var jobs *jobHandler
@@ -23,7 +19,7 @@ type job struct {
 func (j *job) start(pid int) {
 	j.pid = pid
 	j.running = true
-	hooks.Em.Emit("job.start", j.lua())
+//	hooks.Em.Emit("job.start", j.lua())
 }
 
 func (j *job) stop() {
@@ -33,36 +29,39 @@ func (j *job) stop() {
 
 func (j *job) finish() {
 	j.running = false
-	hooks.Em.Emit("job.done", j.lua())
+//	hooks.Em.Emit("job.done", j.lua())
 }
 
 func (j *job) setHandle(handle *os.Process) {
 	j.proc = handle
 }
 
-func (j *job) lua() rt.Value {
+/*
-	jobFuncs := map[string]util.LuaExport{
+func (j *job) lua() *lua.LTable {
-		"stop": {j.luaStop, 0, false},
+	// returns lua table for job
+	// because userdata is gross
+	jobFuncs := map[string]lua.LGFunction{
+		"stop": j.luaStop,
 	}
-	luaJob := rt.NewTable()
+	luaJob := l.SetFuncs(l.NewTable(), jobFuncs)
-	util.SetExports(l, luaJob, jobFuncs)
 
-	luaJob.Set(rt.StringValue("cmd"), rt.StringValue(j.cmd))
+	l.SetField(luaJob, "cmd", lua.LString(j.cmd))
-	luaJob.Set(rt.StringValue("running"), rt.BoolValue(j.running))
+	l.SetField(luaJob, "running", lua.LBool(j.running))
-	luaJob.Set(rt.StringValue("id"), rt.IntValue(int64(j.id)))
+	l.SetField(luaJob, "id", lua.LNumber(j.id))
-	luaJob.Set(rt.StringValue("pid"), rt.IntValue(int64(j.pid)))
+	l.SetField(luaJob, "pid", lua.LNumber(j.pid))
-	luaJob.Set(rt.StringValue("exitCode"), rt.IntValue(int64(j.exitCode)))
+	l.SetField(luaJob, "exitCode", lua.LNumber(j.exitCode))
 
-	return rt.TableValue(luaJob)
+	return luaJob
 }
 
-func (j *job) luaStop(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) {
+func (j *job) luaStop(L *lua.LState) int {
 	if j.running {
 		j.stop()
 	}
 
-	return c.Next(), nil
+	return 0
 }
+*/
 
 type jobHandler struct {
 	jobs map[int]*job
@@ -97,46 +96,42 @@ func (j *jobHandler) getLatest() *job {
 	return j.jobs[j.latestID]
 }
 
-func (j *jobHandler) loader(rtm *rt.Runtime) *rt.Table {
+/*
-	jobFuncs := map[string]util.LuaExport{
+func (j *jobHandler) loader(L *lua.LState) *lua.LTable {
-		"all": {j.luaAllJobs, 0, false},
+	jobFuncs := map[string]lua.LGFunction{
-		"get": {j.luaGetJob, 1, false},
+		"all": j.luaAllJobs,
+		"get": j.luaGetJob,
 	}
 
-	luaJob := rt.NewTable()
+	luaJob := l.SetFuncs(l.NewTable(), jobFuncs)
-	util.SetExports(rtm, luaJob, jobFuncs)
 
 	return luaJob
 }
 
-func (j *jobHandler) luaGetJob(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) {
+func (j *jobHandler) luaGetJob(L *lua.LState) int {
 	j.mu.RLock()
 	defer j.mu.RUnlock()
 
-	if err := c.Check1Arg(); err != nil {
+	jobID := L.CheckInt(1)
-		return nil, err
+	job := j.jobs[jobID]
-	}
+	if job != nil {
-	jobID, err := c.IntArg(0)
+		return 0
-	if err != nil {
-		return nil, err
 	}
+	L.Push(job.lua())
 
-	job := j.jobs[int(jobID)]
+	return 1
-	if job == nil {
-		return c.Next(), nil
-	}
-
-	return c.PushingNext1(t.Runtime, job.lua()), nil
 }
 
-func (j *jobHandler) luaAllJobs(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) {
+func (j *jobHandler) luaAllJobs(L *lua.LState) int {
 	j.mu.RLock()
 	defer j.mu.RUnlock()
 
-	jobTbl := rt.NewTable()
+	jobTbl := L.NewTable()
 	for id, job := range j.jobs {
-		jobTbl.Set(rt.IntValue(int64(id)), job.lua())
+		jobTbl.Insert(id, job.lua())
 	}
 
-	return c.PushingNext1(t.Runtime, rt.TableValue(jobTbl)), nil
+	L.Push(jobTbl)
+	return 1
 }
+*/

rl.go

@@ -13,8 +13,10 @@ type lineReader struct {
 	rl *readline.Instance
 }
 var fileHist *fileHistory
-var hinter *rt.Closure
+/*
-var highlighter *rt.Closure
+var hinter lua.LValue = lua.LNil
+var highlighter lua.LValue = lua.LNil
+*/
 
 func newLineReader(prompt string, noHist bool) *lineReader {
 	rl := readline.NewInstance()
@@ -45,43 +47,53 @@ func newLineReader(prompt string, noHist bool) *lineReader {
 		}
 		hooks.Em.Emit("hilbish.vimAction", actionStr, args)
 	}
+	/*
 	rl.HintText = func(line []rune, pos int) []rune {
-		if hinter == nil {
+		if hinter == lua.LNil {
 			return []rune{}
 		}
 
-		retVal, err := rt.Call1(l.MainThread(), rt.FunctionValue(highlighter),
+		err := l.CallByParam(lua.P{
-		rt.StringValue(string(line)), rt.IntValue(int64(pos)))
+			Fn: hinter,
+			NRet: 1,
+			Protect: true,
+		}, lua.LString(string(line)), lua.LNumber(pos))
 		if err != nil {
 			fmt.Println(err)
 			return []rune{}
 		}
 		
+		retVal := l.Get(-1)
 		hintText := ""
-		if luaStr, ok := retVal.TryString(); ok {
+		if luaStr, ok := retVal.(lua.LString); retVal != lua.LNil && ok {
-			hintText = luaStr
+			hintText = luaStr.String()
 		}
 		
 		return []rune(hintText)
 	}
 	rl.SyntaxHighlighter = func(line []rune) string {
-		if highlighter == nil {
+		if highlighter == lua.LNil {
 			return string(line)
 		}
-		retVal, err := rt.Call1(l.MainThread(), rt.FunctionValue(highlighter),
+		err := l.CallByParam(lua.P{
-		rt.StringValue(string(line)))
+			Fn: highlighter,
+			NRet: 1,
+			Protect: true,
+		}, lua.LString(string(line)))
 		if err != nil {
 			fmt.Println(err)
 			return string(line)
 		}
 		
+		retVal := l.Get(-1)
 		highlighted := ""
-		if luaStr, ok := retVal.TryString(); ok {
+		if luaStr, ok := retVal.(lua.LString); retVal != lua.LNil && ok {
-			highlighted = luaStr
+			highlighted = luaStr.String()
 		}
 		
 		return highlighted
 	}
+	*/
 	rl.TabCompleter = func(line []rune, pos int, _ readline.DelayedTabContext) (string, []*readline.CompletionGroup) {
 		ctx := string(line)
 		var completions []string

runnermode.go

@@ -1,56 +1,47 @@
 package main
 
+/*
 import (
-	"hilbish/util"
-
-	rt "github.com/arnodel/golua/runtime"
 )
 
-func runnerModeLoader(rtm *rt.Runtime) *rt.Table {
+func runnerModeLoader(L *lua.LState) *lua.LTable {
-	exports := map[string]util.LuaExport{
+	exports := map[string]lua.LGFunction{
-		"sh": {shRunner, 1, false},
+		"sh": shRunner,
-		"lua": {luaRunner, 1, false},
+		"lua": luaRunner,
-		"setMode": {hlrunnerMode, 1, false},
+		"setMode": hlrunnerMode,
 	}
 
-	mod := rt.NewTable()
+	mod := L.SetFuncs(L.NewTable(), exports)
-	util.SetExports(rtm, mod, exports)
+	L.SetField(mod, "mode", runnerMode)
 
 	return mod
 }
 
-func shRunner(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) {
+func shRunner(L *lua.LState) int {
-	if err := c.Check1Arg(); err != nil {
+	cmd := L.CheckString(1)
-		return nil, err
-	}
-	cmd, err := c.StringArg(0)
-	if err != nil {
-		return nil, err
-	}
-
 	exitCode, err := handleSh(cmd)
-	var luaErr rt.Value = rt.NilValue
+	var luaErr lua.LValue = lua.LNil
 	if err != nil {
-		luaErr = rt.StringValue(err.Error())
+		luaErr = lua.LString(err.Error())
 	}
 
-	return c.PushingNext(t.Runtime, rt.IntValue(int64(exitCode)), luaErr), nil
+	L.Push(lua.LNumber(exitCode))
+	L.Push(luaErr)
+
+	return 2
 }
 
-func luaRunner(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) {
+func luaRunner(L *lua.LState) int {
-	if err := c.Check1Arg(); err != nil {
+	cmd := L.CheckString(1)
-		return nil, err
-	}
-	cmd, err := c.StringArg(0)
-	if err != nil {
-		return nil, err
-	}
-
 	exitCode, err := handleLua(cmd)
-	var luaErr rt.Value = rt.NilValue
+	var luaErr lua.LValue = lua.LNil
 	if err != nil {
-		luaErr = rt.StringValue(err.Error())
+		luaErr = lua.LString(err.Error())
 	}
 
-	return c.PushingNext(t.Runtime, rt.IntValue(int64(exitCode)), luaErr), nil
+	L.Push(lua.LNumber(exitCode))
+	L.Push(luaErr)
+
+	return 2
 }
+*/

util/export.go

@@ -4,14 +4,12 @@ import (
 	rt "github.com/arnodel/golua/runtime"
 )
 
-// LuaExport represents a Go function which can be exported to Lua.
 type LuaExport struct {
 	Function rt.GoFunctionFunc
 	ArgNum int
 	Variadic bool
 }
 
-// SetExports puts the Lua function exports in the table.
 func SetExports(rtm *rt.Runtime, tbl *rt.Table, exports map[string]LuaExport) {
 	for name, export := range exports {
 		rtm.SetEnvGoFunc(tbl, name, export.Function, export.ArgNum, export.Variadic)

util/util.go

@@ -39,7 +39,6 @@ func SetField(rtm *rt.Runtime, module *rt.Table, field string, value rt.Value, d
 	module.Set(rt.StringValue(field), value)
 }
 
-// DoString runs the code string in the Lua runtime.
 func DoString(rtm *rt.Runtime, code string) error {
 	chunk, err := rtm.CompileAndLoadLuaChunk("", []byte(code), rt.TableValue(rtm.GlobalEnv()))
 	if chunk != nil {
@@ -49,7 +48,6 @@ func DoString(rtm *rt.Runtime, code string) error {
 	return err
 }
 
-// DoFile runs the contents of the file in the Lua runtime.
 func DoFile(rtm *rt.Runtime, filename string) error {
 	data, err := os.ReadFile(filename)
 	if err != nil {
@@ -59,8 +57,6 @@ func DoFile(rtm *rt.Runtime, filename string) error {
 	return DoString(rtm, string(data))
 }
 
-// HandleStrCallback handles function parameters for Go functions which take
-// a string and a closure.
 func HandleStrCallback(t *rt.Thread, c *rt.GoCont) (string, *rt.Closure, error) {
 	if err := c.CheckNArgs(2); err != nil {
 		return "", nil, err