github.com/hairyhenderson/gomplate/v4@v4.0.0-pre-2.0.20240520121557-362f058f0c93/internal/conv/conv.go (about)

     1  package conv
     2  
     3  import (
     4  	"fmt"
     5  	"reflect"
     6  )
     7  
     8  // InterfaceSlice converts an array or slice of any type into an []interface{}
     9  // for use in functions that expect this.
    10  func InterfaceSlice(slice interface{}) ([]interface{}, error) {
    11  	// avoid all this nonsense if this is already a []interface{}...
    12  	if s, ok := slice.([]interface{}); ok {
    13  		return s, nil
    14  	}
    15  	s := reflect.ValueOf(slice)
    16  	kind := s.Kind()
    17  	switch kind {
    18  	case reflect.Slice, reflect.Array:
    19  		l := s.Len()
    20  		ret := make([]interface{}, l)
    21  		for i := 0; i < l; i++ {
    22  			ret[i] = s.Index(i).Interface()
    23  		}
    24  		return ret, nil
    25  	default:
    26  		return nil, fmt.Errorf("expected an array or slice, but got a %T", s)
    27  	}
    28  }