58 lines
1.0 KiB
Go
58 lines
1.0 KiB
Go
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package slices
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import (
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"reflect"
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errors "golang.org/x/xerrors"
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)
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type PtrSlice struct {
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slice reflect.Value
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current interface{}
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t reflect.Type
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idx int
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length int
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}
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func NewPtrSlice(s interface{}) (*PtrSlice, error) {
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ps := &PtrSlice{}
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ps.t = reflect.TypeOf(s)
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if ps.t.Kind() != reflect.Slice {
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return nil, errors.New("Attempted to create a PtrSlice from non-Slice")
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}
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ps.slice = reflect.ValueOf(s)
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ps.length = ps.slice.Len()
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ps.idx = 0
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ps.current = ps.slice.Index(ps.idx).Interface()
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return ps, nil
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}
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func MustPtrSlice(s interface{}) *PtrSlice {
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ps, err := NewPtrSlice(s)
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if err != nil {
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panic(err)
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}
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return ps
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}
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func (ps *PtrSlice) Val() interface{} {
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return ps.current
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}
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func (ps *PtrSlice) Incr() {
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ps.idx++
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ps.current = ps.slice.Index(ps.idx).Interface()
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}
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func (ps *PtrSlice) Len() int {
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return ps.length
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}
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func (ps *PtrSlice) Offset(offset int) interface{} {
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return ps.slice.Index(ps.idx + offset).Interface()
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}
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func (ps *PtrSlice) Get(idx int) interface{} {
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return ps.slice.Index(idx).Interface()
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}
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