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