Hilbish/moonlight/value_clua.go

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2024-07-21 15:37:08 +00:00
//go:build midnight
package moonlight
type Value struct{
iface interface{}
relIdx int
refIdx int
}
var NilValue = Value{nil, -1, -1}
type ValueType uint8
const (
NilType ValueType = iota
BoolType
IntType
StringType
TableType
FunctionType
UnknownType
)
func Type(v Value) ValueType {
return v.Type()
}
func BoolValue(b bool) Value {
return Value{iface: b}
}
func IntValue(i int64) Value {
return Value{iface: i}
}
func StringValue(str string) Value {
return Value{iface: str}
}
func TableValue(t *Table) Value {
return Value{iface: t}
}
func FunctionValue(f Callable) Value {
return NilValue
}
func AsValue(i interface{}) Value {
if i == nil {
return NilValue
}
switch v := i.(type) {
case bool: return BoolValue(v)
case int64: return IntValue(v)
case string: return StringValue(v)
case *Table: return TableValue(v)
case Value: return v
default:
return Value{iface: i}
}
}
func (v Value) Type() ValueType {
if v.iface == nil {
return NilType
}
switch v.iface.(type) {
case bool: return BoolType
case int: return IntType
case string: return StringType
case *Table: return TableType
case *Closure: return FunctionType
default: return UnknownType
}
}
func (v Value) AsInt() int64 {
return v.iface.(int64)
}
func (v Value) AsString() string {
if v.Type() != StringType {
panic("value type was not string")
}
return v.iface.(string)
}
func (v Value) AsTable() *Table {
panic("Value.AsTable unimplemented in midnight")
}
func ToString(v Value) string {
return v.AsString()
}
func (v Value) TypeName() string {
switch v.iface.(type) {
case bool: return "bool"
case int: return "number"
case string: return "string"
case *Table: return "table"
default: return "<unknown type>"
}
}
func (v Value) TryBool() (n bool, ok bool) {
n, ok = v.iface.(bool)
return
}
func (v Value) TryInt() (n int, ok bool) {
n, ok = v.iface.(int)
return
}
func (v Value) TryString() (n string, ok bool) {
n, ok = v.iface.(string)
return
}