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package luar
import (
"reflect"
"github.com/yuin/gopher-lua"
)
func sliceIndex(L *lua.LState) int {
ref, mt := check(L, 1)
key := L.CheckAny(2)
switch converted := key.(type) {
case lua.LNumber:
index := int(converted)
if index < 1 || index > ref.Len() {
L.ArgError(2, "index out of range")
}
val := ref.Index(index - 1)
if (val.Kind() == reflect.Struct || val.Kind() == reflect.Array) && val.CanAddr() {
val = val.Addr()
}
L.Push(New(L, val.Interface()))
case lua.LString:
if fn := mt.method(string(converted)); fn != nil {
L.Push(fn)
return 1
}
return 0
default:
L.ArgError(2, "must be a number or string")
}
return 1
}
func sliceNewIndex(L *lua.LState) int {
ref, _ := check(L, 1)
index := L.CheckInt(2)
value := L.CheckAny(3)
if index < 1 || index > ref.Len() {
L.ArgError(2, "index out of range")
}
val, err := lValueToReflect(L, value, ref.Type().Elem(), nil)
if err != nil {
L.ArgError(3, err.Error())
}
ref.Index(index - 1).Set(val)
return 0
}
func sliceLen(L *lua.LState) int {
ref, _ := check(L, 1)
L.Push(lua.LNumber(ref.Len()))
return 1
}
func sliceCall(L *lua.LState) int {
ref, _ := check(L, 1)
i := 0
fn := func(L *lua.LState) int {
if i >= ref.Len() {
return 0
}
item := ref.Index(i).Interface()
L.Push(lua.LNumber(i + 1))
L.Push(New(L, item))
i++
return 2
}
L.Push(L.NewFunction(fn))
return 1
}
func sliceAdd(L *lua.LState) int {
ref, _ := check(L, 1)
item := L.CheckAny(2)
hint := ref.Type().Elem()
value, err := lValueToReflect(L, item, hint, nil)
if err != nil {
L.ArgError(2, err.Error())
}
ref = reflect.Append(ref, value)
L.Push(New(L, ref.Interface()))
return 1
}
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