43 lines
988 B
Go
43 lines
988 B
Go
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package luar
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import (
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"reflect"
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"github.com/yuin/gopher-lua"
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)
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// Metatable is the Lua metatable for a Go type.
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type Metatable struct {
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*lua.LTable
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}
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// MT returns the metatable for value's type. nil is returned if value's type
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// does not use a custom metatable.
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func MT(L *lua.LState, value interface{}) *Metatable {
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val := reflect.ValueOf(value)
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switch val.Type().Kind() {
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case reflect.Array, reflect.Chan, reflect.Map, reflect.Ptr, reflect.Slice, reflect.Struct:
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return &Metatable{
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LTable: getMetatableFromValue(L, val),
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}
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default:
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return nil
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}
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}
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func (m *Metatable) method(name string) lua.LValue {
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methods := m.RawGetString("methods").(*lua.LTable)
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if fn := methods.RawGetString(name); fn != lua.LNil {
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return fn
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}
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return nil
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}
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func (m *Metatable) fieldIndex(name string) []int {
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fields := m.RawGetString("fields").(*lua.LTable)
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if index := fields.RawGetString(name); index != lua.LNil {
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return index.(*lua.LUserData).Value.([]int)
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}
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return nil
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}
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