47 lines
1.1 KiB
Go
47 lines
1.1 KiB
Go
package ethutil
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import "reflect"
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// The list type is an anonymous slice handler which can be used
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// for containing any slice type to use in an environment which
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// does not support slice types (e.g., JavaScript, QML)
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type List struct {
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list reflect.Value
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Length int
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}
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// Initialise a new list. Panics if non-slice type is given.
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func NewList(t interface{}) *List {
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list := reflect.ValueOf(t)
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if list.Kind() != reflect.Slice {
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panic("list container initialized with a non-slice type")
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}
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return &List{list, list.Len()}
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}
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func EmptyList() *List {
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return NewList([]interface{}{})
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}
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// Get N element from the embedded slice. Returns nil if OOB.
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func (self *List) Get(i int) interface{} {
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if self.list.Len() > i {
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return self.list.Index(i).Interface()
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}
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return nil
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}
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// Appends value at the end of the slice. Panics when incompatible value
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// is given.
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func (self *List) Append(v interface{}) {
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self.list = reflect.Append(self.list, reflect.ValueOf(v))
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self.Length = self.list.Len()
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}
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// Returns the underlying slice as interface.
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func (self *List) Interface() interface{} {
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return self.list.Interface()
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}
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